they had a vent on their baffle (BP6A - series vented) rather than being sealed (BP4) or external vent (BP6B - parallel vented)
I don't think the vents contributed much to output as back chambers were relatively small, vent area small, and damped by the grill cloth. Karlson even vented the little KR5 "Rocket".
I don't think the vents contributed much to output as back chambers were relatively small, vent area small, and damped by the grill cloth. Karlson even vented the little KR5 "Rocket".
ha ! - - I'd think we'd need Reams Karlson Hypex to handle the lower frequencies. There's an AES paper on it.
That's Greg Raw standing next to a Karlson-Hypex with unloaded Clothespin on top. I'd imagine an EV12L type might make a decent driver for a midrange Clothespin like this one.
The Karlson-Hypex is very interesting as in this double wide version, there were two JBL D140 15 inch speakers , with sealed back chamber, which fired down into a chamber; The throat of the horn was a K-slot - look close. Measurements
in the AES paper were pretty impressive and math, "heavy". I've never seen anyone explain how this cabinet might work
Here is the associated patent:
https://patentimages.storage.googleapis.com/5e/86/1d/d18006c4349204/US4196790.pdf
That's Greg Raw standing next to a Karlson-Hypex with unloaded Clothespin on top. I'd imagine an EV12L type might make a decent driver for a midrange Clothespin like this one.
The Karlson-Hypex is very interesting as in this double wide version, there were two JBL D140 15 inch speakers , with sealed back chamber, which fired down into a chamber; The throat of the horn was a K-slot - look close. Measurements
in the AES paper were pretty impressive and math, "heavy". I've never seen anyone explain how this cabinet might work
Here is the associated patent:
https://patentimages.storage.googleapis.com/5e/86/1d/d18006c4349204/US4196790.pdf
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Robert Reams has done impressive work since tha Karlson-Hypex
Patents by Inventor Robert W. Reams
Robert W. Reams has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
System and method for artifact masking
Patent number: 9875756
Abstract: A system for processing audio data comprising a first signal processing path configured to generate a mask control signal. A second signal processing path configured to generate a decorrelated input audio signal. A mixer configured to mix the mask control signal and the decorrelated input audio signal and to generate an output.
Type: Grant
Filed: September 23, 2015
Date of Patent: January 23, 2018
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
System and method for dynamic recovery of audio data
Patent number: 9852744
Abstract: A system for processing audio data comprising a first system configured to receive an input audio data signal and to electronically process the input audio data signal to generate level normalized audio data. A second system configured to receive the level normalized audio data and to electronically process the level normalized audio data to generate a double sideband AM signal. A third system configured to receive the double sideband AM signal and to mix the double sideband AM signal with the input audio data to generate primary audio data frequency components having double sideband AM signal side components.
Type: Grant
Filed: September 23, 2015
Date of Patent: December 26, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
System and method for decorrelating audio data
Patent number: 9830927
Abstract: A system for processing audio data comprising an audio data source. A delay system coupled to the audio data source and a delay input and configured to delay audio data provided by the audio data source by an amount of time equal to the delay input. A randomizer system coupled to the delay input and configured to generate an output that randomly changes as a function of time.
Type: Grant
Filed: September 23, 2015
Date of Patent: November 28, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC EQUALIZATION OF AUDIO DATA
Publication number: 20170294890
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Application
Filed: June 27, 2017
Publication date: October 12, 2017
Inventor: Robert W. Reams
System and method for dynamic equalization of audio data
Patent number: 9691408
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Grant
Filed: September 23, 2015
Date of Patent: June 27, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR COMPRESSED AUDIO ENHANCEMENT
Publication number: 20160171987
Abstract: A system for processing digitally-encoded audio data comprising a compressed audio source device providing a sequence of frames of compressed digital audio data. A compressed audio enhancement system configured to receive the sequence of frames of compressed digital audio data and to generate enhanced audio data by adding masked digital audio data to the sequence of frames of compressed digital audio data, where the masked digital audio data has an energy level sufficient to keep a kinocilia of a listener active. One or more speakers configured to receive the enhanced audio data and to generate sound waves using the enhanced audio data.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC RECOVERY OF AUDIO DATA
Publication number: 20160173995
Abstract: A system for processing audio data comprising a first system configured to receive an input audio data signal and to electronically process the input audio data signal to generate level normalized audio data. A second system configured to receive the level normalized audio data and to electronically process the level normalized audio data to generate a double sideband AM signal. A third system configured to receive the double sideband AM signal and to mix the double sideband AM signal with the input audio data to generate primary audio data frequency components having double sideband AM signal side components.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DECORRELATING AUDIO DATA
Publication number: 20160173979
Abstract: A system for processing audio data comprising an audio data source. A delay system coupled to the audio data source and a delay input and configured to delay audio data provided by the audio data source by an amount of time equal to the delay input. A randomizer system coupled to the delay input and configured to generate an output that randomly changes as a function of time.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR LEVEL CONTROL AT A RECEIVER
Publication number: 20160173808
Abstract: A system for controlling a volume level of television program audio data comprising a first automatic gain control unit having a first threshold value, a first target value, a first smoothing time and a first recovery rate, configured to receive an audio input and to generate an audio output. A second automatic gain control unit having a second threshold value, a second target value, a second smoothing time and a second recovery rate, configured to receive the audio output of the first automatic gain control unit and to generate a second audio output, wherein the first threshold value is less than the second threshold value.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC EQUALIZATION OF AUDIO DATA
Publication number: 20160171985
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR ARTIFACT MASKING
Publication number: 20160171968
Abstract: A system for processing audio data comprising a first signal processing path configured to generate a mask control signal. A second signal processing path configured to generate a decorrelated input audio signal. A mixer configured to mix the mask control signal and the decorrelated input audio signal and to generate an output.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
Audiovisual content delivery system
Patent number: 8559749
Abstract: A system for processing video data to improve image quality at low data rates comprising an encoder generating an entropy signal representing the relative entropy of the video data and a plurality of filters each receiving the entropy signal and a threshold setting and filtering the video data if the entropy signal is greater than the threshold setting.
Type: Grant
Filed: February 5, 2010
Date of Patent: October 15, 2013
Assignee: Streaming Appliances, LLC
Inventor: Robert W. Reams
AUDIOVISUAL CONTENT DELIVERY SYSTEM
Publication number: 20110164827
Abstract: A system for processing video data to improve image quality at low data rates comprising an encoder generating an entropy signal representing the relative entropy of the video data and a plurality of filters each receiving the entropy signal and a threshold setting and filtering the video data if the entropy signal is greater than the threshold setting.
Type: Application
Filed: February 5, 2010
Publication date: July 7, 2011
Inventors: Robert W. Reams, Evan C. Johnson
AUDIOVISUAL CONTENT CHANNELIZATION SYSTEM
Publication number: 20110167445
Abstract: A system for providing audiovisual data. A run-length audiovisual data system for providing run-length audiovisual content. An advertising content system for providing advertising content. A semantic filter system for processing the run-length audiovisual content and the advertising content and matching the run-length audiovisual content to the advertising content based on semantic filter output matching.
Type: Application
Filed: February 5, 2010
Publication date: July 7, 2011
Inventors: Robert W. Reams, Evan C. Johnson
Audio spatial environment engine
Patent number: 7853022
Abstract: An audio spatial environment engine for flexible and scalable up-mixing from an M channel audio system to an N channel audio system, where M and N are integers and N is greater than M, is provided. The input M channel audio is provided to an analysis filter bank which converts the time domain signals into frequency domain signals. Relevant inter-channel spatial cues are extracted from the frequency domain signals on a sub-band basis and are used as parameters to generate adaptive N channel filters which control the spatial placement of a frequency band element in the up-mixed sound field. The N channel filters are smoothed across both time and frequency to limit filter variability which could cause annoying fluctuation effects. The smoothed N channel filters are then applied to adaptive combinations of the frequency domain input signals and are provided to a synthesis filter bank which generates the N channel time domain output signals.
Type: Grant
Filed: October 28, 2005
Date of Patent: December 14, 2010
Inventors: Jeffrey K. Thompson, Robert W. Reams, Aaron Warner
Spatial teleconferencing system and method
Publication number: 20090052701
Abstract: A system for processing audio data is provided. A left channel system receives a first channel of audio data, and a right channel system receiving a second channel of audio data. A delay coupled to one of the left channel system and the right channel system provides a delay to one of the first channel of audio data and the second channel of audio data, wherein the delay causes an apparent location of a source to a listener to occur in a single location.
Type: Application
Filed: August 20, 2007
Publication date: February 26, 2009
Inventor: Robert W. Reams
Phase decorrelation for audio processing
Publication number: 20090052676
Abstract: A system for decorrelating audio data is provided. The system includes a noise generator generating a random noise signal. A phase shift system receives an input channel of audio data and the random noise signal and generates a phase shifted channel of audio data having a phase shift based on the random noise signal.
Type: Application
Filed: August 20, 2007
Publication date: February 26, 2009
Inventor: Robert W. Reams
System and method for processing audio data
Publication number: 20040013272
Abstract: A system for processing audio data is provided. The system includes a spectral shaping system that receives sample audio data and adaptive gain data and generates spectral characteristic data for one or more spectral bands. The system also includes an audio processing system that receives the spectral characteristic data and which processes the audio data so as to provide the spectral characteristic data for the spectral bands of the audio data.
Type: Application
Filed: March 7, 2003
Publication date: January 22, 2004
Inventor: Robert W Reams
Electro-acoustic system analyzer
Patent number: 5555311
Abstract: A method and apparatus for analyzing performance parameters of an electro-acoustic system. The bandwidth of the electro-acoustic system is determined by applying a broad band stimulus signal to its input, and picking up the resulting acoustic signal with a microphone. The microphone output is then applied to a state variable filter having a low-pass filter output, a high-pass filter output, and a band-pass filter output. The operating frequency of the state variable filter is changed incrementally through each of a plurality of frequencies. The high and low frequency responses of the electro-acoustic system is determined on the basis of the operating frequencies of the state variable filter at which accumulated values of the outputs of the state variable filter bear certain relationships to each other.
Type: Grant
Filed: April 1, 1994
Date of Patent: September 10, 1996
Assignee: Electronic Engineering and Manufacturing, Inc.
Inventor: Robert W. Reams
Acoustic transducer having multiple frequency resonance
Patent number: 4196790
Abstract: An acoustic transducer for reproduction of sound over a wide frequency band. The transducer consists of an elongated partially enclosed chamber having a sound source at one end and wherein the cross-sectional area of the chamber is decreased with distance along the length of the chamber away from the sound source. A curved wall is included in the chamber to serve as an expanding horn, the lower end of which is provided with an elongated slot aperture which widens exponentially as a function of the length of the chamber through which sound energy is delivered to the aperture of the horn.
Type: Grant
Filed: March 27, 1978
Date of Patent: April 8, 1980
Inventor: Robert W. Reams
Patents by Inventor Robert W. Reams
Robert W. Reams has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
System and method for artifact masking
Patent number: 9875756
Abstract: A system for processing audio data comprising a first signal processing path configured to generate a mask control signal. A second signal processing path configured to generate a decorrelated input audio signal. A mixer configured to mix the mask control signal and the decorrelated input audio signal and to generate an output.
Type: Grant
Filed: September 23, 2015
Date of Patent: January 23, 2018
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
System and method for dynamic recovery of audio data
Patent number: 9852744
Abstract: A system for processing audio data comprising a first system configured to receive an input audio data signal and to electronically process the input audio data signal to generate level normalized audio data. A second system configured to receive the level normalized audio data and to electronically process the level normalized audio data to generate a double sideband AM signal. A third system configured to receive the double sideband AM signal and to mix the double sideband AM signal with the input audio data to generate primary audio data frequency components having double sideband AM signal side components.
Type: Grant
Filed: September 23, 2015
Date of Patent: December 26, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
System and method for decorrelating audio data
Patent number: 9830927
Abstract: A system for processing audio data comprising an audio data source. A delay system coupled to the audio data source and a delay input and configured to delay audio data provided by the audio data source by an amount of time equal to the delay input. A randomizer system coupled to the delay input and configured to generate an output that randomly changes as a function of time.
Type: Grant
Filed: September 23, 2015
Date of Patent: November 28, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC EQUALIZATION OF AUDIO DATA
Publication number: 20170294890
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Application
Filed: June 27, 2017
Publication date: October 12, 2017
Inventor: Robert W. Reams
System and method for dynamic equalization of audio data
Patent number: 9691408
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Grant
Filed: September 23, 2015
Date of Patent: June 27, 2017
Assignee: PSYX RESEARCH, INC.
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR COMPRESSED AUDIO ENHANCEMENT
Publication number: 20160171987
Abstract: A system for processing digitally-encoded audio data comprising a compressed audio source device providing a sequence of frames of compressed digital audio data. A compressed audio enhancement system configured to receive the sequence of frames of compressed digital audio data and to generate enhanced audio data by adding masked digital audio data to the sequence of frames of compressed digital audio data, where the masked digital audio data has an energy level sufficient to keep a kinocilia of a listener active. One or more speakers configured to receive the enhanced audio data and to generate sound waves using the enhanced audio data.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC RECOVERY OF AUDIO DATA
Publication number: 20160173995
Abstract: A system for processing audio data comprising a first system configured to receive an input audio data signal and to electronically process the input audio data signal to generate level normalized audio data. A second system configured to receive the level normalized audio data and to electronically process the level normalized audio data to generate a double sideband AM signal. A third system configured to receive the double sideband AM signal and to mix the double sideband AM signal with the input audio data to generate primary audio data frequency components having double sideband AM signal side components.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DECORRELATING AUDIO DATA
Publication number: 20160173979
Abstract: A system for processing audio data comprising an audio data source. A delay system coupled to the audio data source and a delay input and configured to delay audio data provided by the audio data source by an amount of time equal to the delay input. A randomizer system coupled to the delay input and configured to generate an output that randomly changes as a function of time.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR LEVEL CONTROL AT A RECEIVER
Publication number: 20160173808
Abstract: A system for controlling a volume level of television program audio data comprising a first automatic gain control unit having a first threshold value, a first target value, a first smoothing time and a first recovery rate, configured to receive an audio input and to generate an audio output. A second automatic gain control unit having a second threshold value, a second target value, a second smoothing time and a second recovery rate, configured to receive the audio output of the first automatic gain control unit and to generate a second audio output, wherein the first threshold value is less than the second threshold value.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR DYNAMIC EQUALIZATION OF AUDIO DATA
Publication number: 20160171985
Abstract: A system for processing audio data is disclosed that includes a plurality of gain adjustment devices, each gain adjustment device having an associated audio input frequency band. A plurality of control signal processing systems are configured to receive audio input data for one of the associated audio input frequency bands and to generate a gain adjustment device control signal. The gain adjustment device control signal is configured to decrease a gain setting of an associated gain adjustment device for a predetermined period of time as a function of a transient in the associated audio input frequency band.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
SYSTEM AND METHOD FOR ARTIFACT MASKING
Publication number: 20160171968
Abstract: A system for processing audio data comprising a first signal processing path configured to generate a mask control signal. A second signal processing path configured to generate a decorrelated input audio signal. A mixer configured to mix the mask control signal and the decorrelated input audio signal and to generate an output.
Type: Application
Filed: September 23, 2015
Publication date: June 16, 2016
Inventor: Robert W. Reams
Audiovisual content delivery system
Patent number: 8559749
Abstract: A system for processing video data to improve image quality at low data rates comprising an encoder generating an entropy signal representing the relative entropy of the video data and a plurality of filters each receiving the entropy signal and a threshold setting and filtering the video data if the entropy signal is greater than the threshold setting.
Type: Grant
Filed: February 5, 2010
Date of Patent: October 15, 2013
Assignee: Streaming Appliances, LLC
Inventor: Robert W. Reams
AUDIOVISUAL CONTENT DELIVERY SYSTEM
Publication number: 20110164827
Abstract: A system for processing video data to improve image quality at low data rates comprising an encoder generating an entropy signal representing the relative entropy of the video data and a plurality of filters each receiving the entropy signal and a threshold setting and filtering the video data if the entropy signal is greater than the threshold setting.
Type: Application
Filed: February 5, 2010
Publication date: July 7, 2011
Inventors: Robert W. Reams, Evan C. Johnson
AUDIOVISUAL CONTENT CHANNELIZATION SYSTEM
Publication number: 20110167445
Abstract: A system for providing audiovisual data. A run-length audiovisual data system for providing run-length audiovisual content. An advertising content system for providing advertising content. A semantic filter system for processing the run-length audiovisual content and the advertising content and matching the run-length audiovisual content to the advertising content based on semantic filter output matching.
Type: Application
Filed: February 5, 2010
Publication date: July 7, 2011
Inventors: Robert W. Reams, Evan C. Johnson
Audio spatial environment engine
Patent number: 7853022
Abstract: An audio spatial environment engine for flexible and scalable up-mixing from an M channel audio system to an N channel audio system, where M and N are integers and N is greater than M, is provided. The input M channel audio is provided to an analysis filter bank which converts the time domain signals into frequency domain signals. Relevant inter-channel spatial cues are extracted from the frequency domain signals on a sub-band basis and are used as parameters to generate adaptive N channel filters which control the spatial placement of a frequency band element in the up-mixed sound field. The N channel filters are smoothed across both time and frequency to limit filter variability which could cause annoying fluctuation effects. The smoothed N channel filters are then applied to adaptive combinations of the frequency domain input signals and are provided to a synthesis filter bank which generates the N channel time domain output signals.
Type: Grant
Filed: October 28, 2005
Date of Patent: December 14, 2010
Inventors: Jeffrey K. Thompson, Robert W. Reams, Aaron Warner
Spatial teleconferencing system and method
Publication number: 20090052701
Abstract: A system for processing audio data is provided. A left channel system receives a first channel of audio data, and a right channel system receiving a second channel of audio data. A delay coupled to one of the left channel system and the right channel system provides a delay to one of the first channel of audio data and the second channel of audio data, wherein the delay causes an apparent location of a source to a listener to occur in a single location.
Type: Application
Filed: August 20, 2007
Publication date: February 26, 2009
Inventor: Robert W. Reams
Phase decorrelation for audio processing
Publication number: 20090052676
Abstract: A system for decorrelating audio data is provided. The system includes a noise generator generating a random noise signal. A phase shift system receives an input channel of audio data and the random noise signal and generates a phase shifted channel of audio data having a phase shift based on the random noise signal.
Type: Application
Filed: August 20, 2007
Publication date: February 26, 2009
Inventor: Robert W. Reams
System and method for processing audio data
Publication number: 20040013272
Abstract: A system for processing audio data is provided. The system includes a spectral shaping system that receives sample audio data and adaptive gain data and generates spectral characteristic data for one or more spectral bands. The system also includes an audio processing system that receives the spectral characteristic data and which processes the audio data so as to provide the spectral characteristic data for the spectral bands of the audio data.
Type: Application
Filed: March 7, 2003
Publication date: January 22, 2004
Inventor: Robert W Reams
Electro-acoustic system analyzer
Patent number: 5555311
Abstract: A method and apparatus for analyzing performance parameters of an electro-acoustic system. The bandwidth of the electro-acoustic system is determined by applying a broad band stimulus signal to its input, and picking up the resulting acoustic signal with a microphone. The microphone output is then applied to a state variable filter having a low-pass filter output, a high-pass filter output, and a band-pass filter output. The operating frequency of the state variable filter is changed incrementally through each of a plurality of frequencies. The high and low frequency responses of the electro-acoustic system is determined on the basis of the operating frequencies of the state variable filter at which accumulated values of the outputs of the state variable filter bear certain relationships to each other.
Type: Grant
Filed: April 1, 1994
Date of Patent: September 10, 1996
Assignee: Electronic Engineering and Manufacturing, Inc.
Inventor: Robert W. Reams
Acoustic transducer having multiple frequency resonance
Patent number: 4196790
Abstract: An acoustic transducer for reproduction of sound over a wide frequency band. The transducer consists of an elongated partially enclosed chamber having a sound source at one end and wherein the cross-sectional area of the chamber is decreased with distance along the length of the chamber away from the sound source. A curved wall is included in the chamber to serve as an expanding horn, the lower end of which is provided with an elongated slot aperture which widens exponentially as a function of the length of the chamber through which sound energy is delivered to the aperture of the horn.
Type: Grant
Filed: March 27, 1978
Date of Patent: April 8, 1980
Inventor: Robert W. Reams
little PC speakers, if a K may help, probably would be a regular K - unless the speaker is inordinately "bright" as the klam format buries the speaker at the far end of the slotted wedge vs a regular K having the driver at the shallow end.
Little K have their cavity resonance up pretty high It might be possible to make a little klam which does not honk, using pvc pipe, sliced diagonally and end fitted with a flat piece with slot cut - or take a heat gun and flatten the front pipe to get an oval cross section. That could be fun. .The back chamber could be 4" or 5" pvc adapter so result would look like a sawed off potato cannon.
This little klam w. FR88 was pretty bad sounding - a speaker with significant on-axis rise such as a LaVoce 3" I've used with slot filter probably would have been better.
9mm Baltic birch would be better even for such a tiny thing as this than 6mm.
Melamine sponge front and back chamber pads probably would have helped too.
My klam15 sounds fine without any front chamber damping. Mild damping might give some improvement.
Klam8 and Klam 10 size could use some front chamber damping to reduce ricochet junk. That would not be noticed
at some distance but would be obnoxious up close.
I'm lusting after the first X15's tweeter klam and hope can find someone to print it after Pelanj posts the 3D model.
Little K have their cavity resonance up pretty high It might be possible to make a little klam which does not honk, using pvc pipe, sliced diagonally and end fitted with a flat piece with slot cut - or take a heat gun and flatten the front pipe to get an oval cross section. That could be fun. .The back chamber could be 4" or 5" pvc adapter so result would look like a sawed off potato cannon.
This little klam w. FR88 was pretty bad sounding - a speaker with significant on-axis rise such as a LaVoce 3" I've used with slot filter probably would have been better.
9mm Baltic birch would be better even for such a tiny thing as this than 6mm.
Melamine sponge front and back chamber pads probably would have helped too.
My klam15 sounds fine without any front chamber damping. Mild damping might give some improvement.
Klam8 and Klam 10 size could use some front chamber damping to reduce ricochet junk. That would not be noticed
at some distance but would be obnoxious up close.
I'm lusting after the first X15's tweeter klam and hope can find someone to print it after Pelanj posts the 3D model.
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I've personally only built Klam3 and Klam18. I do think a Klam15 built by my long distance friend John Lapaire, turned out very well and the only mod I would do would be to shorten its back chamber to move Qtc and power handling up a bit, and reduce overall length. It should be very nice up on a tripod. (I lost upper body strength in just a couple of months decades aoo from sleep apnea - don't know what it really did.}
IIRC there's maybe 2 cubic foot rear chamber. With medium rear chamber bill that might be knocked down by a half a cubic foot, which would shorten overall length by maybe 4 inches.
IIRC there's maybe 2 cubic foot rear chamber. With medium rear chamber bill that might be knocked down by a half a cubic foot, which would shorten overall length by maybe 4 inches.