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Old 7th November 2019, 06:23 PM   #1
adri123 is offline adri123  United Kingdom
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Default DIY Bluetooth Speaker

Hi

Am looking to make a DIY BT speaker. I made one a few years ago with my son and fancy making another but have forgotten which amp etc I used.

Can anyone recommend a pair of full range speakers that would be good for such a project?

Last one had a pair of "peerless P830986 HI END 3inch fullrange speaker" That was the ebay ad anyway. It sounded super but I can't find any more of them.

Also, what amp module would you recommend?

TIA

Adri
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Old 7th November 2019, 09:57 PM   #2
kd1yt is offline kd1yt  United States
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The Fountek FR59EXE fullranges, which I have used and really liked, have been on sale at Madisound for about $14 and have a built-in grille. Without a port or a passive radiator they will be thin on the low frequencies but in a 4x4x4 inch internal cavity box with a Dayton DMA58-PR I got a really nice full-bodied, full-range sound.
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Old 8th November 2019, 06:04 AM   #3
Nenola is offline Nenola  Finland
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Could you give a bit more specs to start with? Like what kind of battery are you planning to use, or already have? What size of enclosure is the maximum? Budget?

Those Peerless are still available, for example here:

Buying a Peerless PLS-P830986 woofer? | SoundImports - SoundImports

Peerless by Tymphany 830986 3" Full Range Woofer

Tangband and Dayton Audio have also good candidates for the job.
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Old 8th November 2019, 07:34 AM   #4
adri123 is offline adri123  United Kingdom
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Thx for the replies.

If I go from a 3" driver like the peerless to a 2" one like the FR59EXE will there be much of a difference?

I do want a good full sound.

Also the aim is to have a BT speaker. Any suggestions for an amp module with BT included would be appreciated. What wattage should the amp be.

As for batteries I thought about using some of the 18650 lithium batteries in a holder with a step up/down voltage converter if needed.

Adri
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Old 8th November 2019, 07:37 AM   #5
adri123 is offline adri123  United Kingdom
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Also, if I go for 2 x the FR59EXE would that need 2 passive radiators?

Cheers

Adri
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Old 8th November 2019, 07:52 AM   #6
adri123 is offline adri123  United Kingdom
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And final question for now.

Would a single Dayton Audio RS100-8 4" driver give a better sound than stereo FR59EXE ?

So many variables!!!
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Old 8th November 2019, 04:52 PM   #7
Nenola is offline Nenola  Finland
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With bigger driver it's usually easier to get the lower notes audible. The fountek has Frequency Response 139-20,000Hz and the dayton 90 to 20,000 Hz, so the dayton probably would be a better choice. There is also ND91 from dayton, which goes quite low, and usable as a full range driver.

You could do with one passive radiator if it is large enough, or just build a ported box. But in smaller builds, passive radiators will save some enclosure volume.
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Old 8th November 2019, 09:10 PM   #8
kd1yt is offline kd1yt  United States
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Quote:
Originally Posted by adri123 View Post
Also, if I go for 2 x the FR59EXE would that need 2 passive radiators?

Cheers

Adri

The usual rule of thumb is 2x the surface area of PR as compared to the active driver. But the DMA58 has ~2x the Xmax of the FR59, so I decided to wing it and it seems to work.
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Old 9th November 2019, 01:22 PM   #9
adri123 is offline adri123  United Kingdom
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tempted to try the tested route of FR59EXE with the Dayton DMA58-PR (I'm assuming it would be 2 drivers to one PR)

The other option that has come up is a single Fountek FR135EX with a PR yet to be chosen. Being a total newbie though How would you handle stereo sound from the amp module to a single driver?

Can't decide which way to go.

Help most welcome!!!

Adri
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Old 17th November 2019, 05:55 AM   #10
Nenola is offline Nenola  Finland
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Quote:
Originally Posted by adri123 View Post
How would you handle stereo sound from the amp module to a single driver?
With mono amplifier. I have used this in some projects:

TPA3118 PBTL Mono Digital Amplifier Board 60W 8-24V POWER AMP Replace TPA3110 YA | eBay
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