I'm planning on using these drivers from 250-3400hz. Was wondering if anyone would be willing to help calculate a proper sized enclosure for that frequency range?
Ciare NDK6-1.5 - Ciare NDK6-1.5 is a 6.5 inch lightweight neodymium midrange speaker for all midrange speaker systems- Ciare Speakers - Ciare NDK6-1.5 6.5 inch lighweight neodymium midrange speaker. Ciare NDK6-1.5 6.5 inch midrange speakers
Ciare NDK6-1.5 - Ciare NDK6-1.5 is a 6.5 inch lightweight neodymium midrange speaker for all midrange speaker systems- Ciare Speakers - Ciare NDK6-1.5 6.5 inch lighweight neodymium midrange speaker. Ciare NDK6-1.5 6.5 inch midrange speakers
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I'd guesstimate 1.5 litres (sealed), but you're not using the driver near Fs, so any size above ludicrously small. The TS based calculators describe how a driver works around Fs, so aren't as important for a driver that has a high pass filter.
For 250Hz-1kHz, picking a good baffle (the stuff that was covered in your baffle thread) will probably have more effect than getting the box size 'perfect'.
For 250Hz-1kHz, picking a good baffle (the stuff that was covered in your baffle thread) will probably have more effect than getting the box size 'perfect'.
Has anyone ever ported a midrange speaker, in a 3-way design? I have never even seen it done. I inquired from a Ciare dealer, and received this response:
"Ciare NDK6-1.5 is a very good sounding midrange speaker. Nice choice. It wants to be in a small vented enclosure of .19 cu. ft. You could do 10.25" wide x 8" x 4" deep. (1) round 1.5" port with a .75 depth. If you use .75" thick plywood you could just cut the 1.5" hole. This keeps this speaker flat from 300Hz and up. I would use some insulation on every other wall for this area."
I am only playing this midrange down to 250hz. Why would I need a port for this? 250 to 3400hz.
I really wanted to use it sealed ... I need some understanding and educating, please.
"Ciare NDK6-1.5 is a very good sounding midrange speaker. Nice choice. It wants to be in a small vented enclosure of .19 cu. ft. You could do 10.25" wide x 8" x 4" deep. (1) round 1.5" port with a .75 depth. If you use .75" thick plywood you could just cut the 1.5" hole. This keeps this speaker flat from 300Hz and up. I would use some insulation on every other wall for this area."
I am only playing this midrange down to 250hz. Why would I need a port for this? 250 to 3400hz.
I really wanted to use it sealed ... I need some understanding and educating, please.
Maybe their reasoning is the same as this article:
Satellites and Subwoofers
See figure two.
The port is tuned pretty high. It gives a bump in output, but when combined with the correction filter (in in your case, when combined with the crossover), it means that the flat response is extended slightly lower than otherwise.
For a pro application, the bump in output is good, because it'd reduce the driver's excursion slightly.
Okay ... thanks for that angle. I will be using these from only 7.5 feet away, in my home. I can not imagine having two point sources in a midrange application. I would not be wanting midrange coming from a hole in the enclosure.
What about the backwave of the speaker? That does not exit the port and affect the sound negatively?
I'm confused ... The port is an open hole. Sound is going to escape. How does that not smear the sound arriving at the listening position?
Hi Michael ... where did they hide the port on it? I can not find one in photos.
I REALLY need some understanding. from my limited knowledge, ports augment certain frequencies by also playing music from the port. For low frequencies, a rear port is just fine. But porting midrange frequencies seems VERY odd to me. Can you actually REAR port a midrange driver, without some odd partial dipole effect?
I REALLY need some understanding. from my limited knowledge, ports augment certain frequencies by also playing music from the port. For low frequencies, a rear port is just fine. But porting midrange frequencies seems VERY odd to me. Can you actually REAR port a midrange driver, without some odd partial dipole effect?
Troels has several three ways with ported mids.
My current speakers are one of these.
And who says you need to put the port on the front ?
Troels has done side and rear porting for mids.
My current speakers are one of these.
And who says you need to put the port on the front ?
Troels has done side and rear porting for mids.
Okay OldnCranky, and Michael ... It is becoming obvious to me, that frequencies coming from the port to augment the level of the cone itself, is INCORRECT in how it must work. Otherwise, side, and rear ported would never work.
It must be the port does not put out sound to augment the cone's output, but to allow the cone to go lower itself, while maintaining the same level.
Please tell me I am understanding finally.
It must be the port does not put out sound to augment the cone's output, but to allow the cone to go lower itself, while maintaining the same level.
Please tell me I am understanding finally.
No.
You might find that reading a book or some articles would be more efficient than making wild guesses on a forum.
Thank you for your advice. I am afraid I do not have time to read a book, at this time in my life. I am having to wing it, and I am learning what I need from kind people on the forum. And, I learn much better with direct questions, when I am trying to figure things out, I am already reading about, but still confused on. 😉
I find that someone will usually be kind enough to explain things they so easily understand, such as ports on a midrange, and how you can get away with midrange rear ports.
I find that someone will usually be kind enough to explain things they so easily understand, such as ports on a midrange, and how you can get away with midrange rear ports.
Because you don't want to take the time yourself, you have others spend their time answering your questions?
Hard to see the big time savings, sorting through conflicting advice with no fundamental knowledge that would facilitate discerning fact from opinion, but we all have our preferences, I suppose.
Hard to see the big time savings, sorting through conflicting advice with no fundamental knowledge that would facilitate discerning fact from opinion, but we all have our preferences, I suppose.
You will get sound from a port, but you won't get high fidelity. A resonator (port) output level only comes up after several cycles of the sine wave input have pumped up the spring mass system so it gives some audible output. So you throw transient response out the window. I would not want to add a resonance in the midrange, adding it to the bass is bad enough.