can anyone can tell me how this small portable bluetooth speaker has good bass like in jbl,marshall,bose and many more speaker. How cabinet of this small type speaker is design.And how can i make this small speaker with great bass?
Welcome to the forum!
The amplification inside the speaker does not supply a 'flat' signal to the loudspeaker like a hi-fi amp does, but boosts the bass electronically, giving the impression of a bigger, bassier speaker.
The experts here will tell you how this works, I'm sure!
The amplification inside the speaker does not supply a 'flat' signal to the loudspeaker like a hi-fi amp does, but boosts the bass electronically, giving the impression of a bigger, bassier speaker.
The experts here will tell you how this works, I'm sure!
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It's not quite as simple as increasing the strength of the bass compared to the rest of the audio spectrum. The small speaker driver must be designed to have a large cone excursion i.e. be designed to handle the large amplitudes of the boosted bass signals.
Another way is to use Digital Signal Processing (DSP) to add harmonics to the signal that trick our brains into hearing lower frequencies that are not actually added to the audio signal or produced by the speaker. This works well for small speakers with limited excursion capabilities.
Another way is to use Digital Signal Processing (DSP) to add harmonics to the signal that trick our brains into hearing lower frequencies that are not actually added to the audio signal or produced by the speaker. This works well for small speakers with limited excursion capabilities.
thank you for sharing knowledge between us. Is it esay to make these type of small bass boost speaker at home.
It would be difficult to design what you want from scratch, unless you have a good knowledge of electronics.
The best bet may be to search for a kit such as: DIY Kit Bluetooth 5.0 Portable Speaker MP3 Music Player Audio Power Amplifier | eBay
However, such a cheap kit is unlikely to deliver the "great bass" you are after, so look for something more expensive.
At some point, it will be more econonomical just to buy a commercially produced model from the likes of JBL.
The best bet may be to search for a kit such as: DIY Kit Bluetooth 5.0 Portable Speaker MP3 Music Player Audio Power Amplifier | eBay
However, such a cheap kit is unlikely to deliver the "great bass" you are after, so look for something more expensive.
At some point, it will be more econonomical just to buy a commercially produced model from the likes of JBL.
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i've been racking my brain trying to do a small build and get the same bass output as a soundlink mini, but struggled...considering the parts and 7-8v battery they somehow get decent sound at decent levels out of tiny drivers. From my understanding there may be some circuits and DSP/EQ manipulation happening to get this.....
TLDR manipulation of DSP/EQ and bass boost circuits i believe.
in the way of bass and volume the closest i got was Inspired by the Phantom - 3D printed project -
Techtalk Speaker Building, Audio, Video Discussion Forum , best thing about this is it gets low for a 2inch driver with a F3 of 60hz, yes it is twice the size of a soundlink, but it craps all over it 🙂
, but a non battery option that was surprising ok, was 3rutu5 - QUARAN-TEEEEENIE -
Techtalk Speaker Building, Audio, Video Discussion Forum and a mono speaker that honestly sounded a bit tiny with all the passives was Boozetooth Speaker MKIII -
Techtalk Speaker Building, Audio, Video Discussion Forum, i also did the boozetooth with a ported arangement which was louded and better, but gave up trying to fluff about with all the internals and it gets frustraiting....
TLDR manipulation of DSP/EQ and bass boost circuits i believe.
in the way of bass and volume the closest i got was Inspired by the Phantom - 3D printed project -
Techtalk Speaker Building, Audio, Video Discussion Forum , best thing about this is it gets low for a 2inch driver with a F3 of 60hz, yes it is twice the size of a soundlink, but it craps all over it 🙂
, but a non battery option that was surprising ok, was 3rutu5 - QUARAN-TEEEEENIE -
Techtalk Speaker Building, Audio, Video Discussion Forum and a mono speaker that honestly sounded a bit tiny with all the passives was Boozetooth Speaker MKIII -
Techtalk Speaker Building, Audio, Video Discussion Forum, i also did the boozetooth with a ported arangement which was louded and better, but gave up trying to fluff about with all the internals and it gets frustraiting....
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You can tune a bass reflex enclosure to just above the lowest frequency you want to reproduce, no matter how ugly the frequency response becomes, use equalization to flatten the weird frequency response you got and use digital predistortion and/or motional feedback to reduce the loudspeaker's distortion.
The secret is "Hofmann's Iron Law" (who was the H in KLH). Josef Anton Hofmann - Wikipedia To get deep bass from a small enclosure, you have to sacrifice sensitivity (efficiency).
Fortunately, we now have cheap, powerful and efficient class-D amplifiers, so a small speaker could have as much power as the typical "high power" car head unit, around 10 watts RMS per channel, 100 times more than a table radio or boom box of the past.
Then you have to find a driver that is small enough to fit in a tiny box yet has an Fs comparable to a much bigger driver; that means an unusually heavy cone, which makes it inefficient. The boxes are tuned as ported boxes, but with a passive radiator since a conventional port couldn't fit in the box. Passive radiators replace the inertia of a moving slug of air inside a port with a weighted drone cone.
The electronics creates a wider stereo image by adding a portion of each channel out of phase into the opposite channel. (Not a new thing; boomboxes and stereo table radios of the past sometimes did this too. Radio Shack called it "Stereo-Wide.") There could be a 2nd order auxiliary filter to convert the 4th order ported system to 6th order, or a high pass filter to block low frequencies the woofers can't handle. Finally, there may be limiters or "concealment" circuits that prevent amplifier clipping or exceeding the woofer mechanical limits.
Finally, if the Logitech dock I tore apart is representative, there's a single lithium-ion cell with protection module (short-circuit and overcharging), a switching converter to step that up to run the power amplifier, and stuff to manage the charging of the lithium cell. And stuff for Bluetooth and user interface.
Fortunately, we now have cheap, powerful and efficient class-D amplifiers, so a small speaker could have as much power as the typical "high power" car head unit, around 10 watts RMS per channel, 100 times more than a table radio or boom box of the past.
Then you have to find a driver that is small enough to fit in a tiny box yet has an Fs comparable to a much bigger driver; that means an unusually heavy cone, which makes it inefficient. The boxes are tuned as ported boxes, but with a passive radiator since a conventional port couldn't fit in the box. Passive radiators replace the inertia of a moving slug of air inside a port with a weighted drone cone.
The electronics creates a wider stereo image by adding a portion of each channel out of phase into the opposite channel. (Not a new thing; boomboxes and stereo table radios of the past sometimes did this too. Radio Shack called it "Stereo-Wide.") There could be a 2nd order auxiliary filter to convert the 4th order ported system to 6th order, or a high pass filter to block low frequencies the woofers can't handle. Finally, there may be limiters or "concealment" circuits that prevent amplifier clipping or exceeding the woofer mechanical limits.
Finally, if the Logitech dock I tore apart is representative, there's a single lithium-ion cell with protection module (short-circuit and overcharging), a switching converter to step that up to run the power amplifier, and stuff to manage the charging of the lithium cell. And stuff for Bluetooth and user interface.
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Having done a couple of designs for some bluetooth companies.
Most bigger brands all use dynamic EQ techniques, in combination with compression and some additional psycho-acoustic effects like bass enhancement techniques.
(so basically fooling your brain there are lower frequencies).
"Voice shaping" the sound also really helps. (so giving the impression of something basically)
I have never seen any more sophisticated techniques (especially not in the sense of motion feedback, way to costly and complicated to implement)
And while sounding impressive, when you REALLY focus and listen to these little devices, a trained listener could hear most of these magic tricks.
But lets be honest, nobody does that when just having a chat with friends, lying on the beach or having some background music out in the yard or porch.
Most bigger brands all use dynamic EQ techniques, in combination with compression and some additional psycho-acoustic effects like bass enhancement techniques.
(so basically fooling your brain there are lower frequencies).
"Voice shaping" the sound also really helps. (so giving the impression of something basically)
I have never seen any more sophisticated techniques (especially not in the sense of motion feedback, way to costly and complicated to implement)
And while sounding impressive, when you REALLY focus and listen to these little devices, a trained listener could hear most of these magic tricks.
But lets be honest, nobody does that when just having a chat with friends, lying on the beach or having some background music out in the yard or porch.