SANWU boards are usually quite decent. Without knowing your Speaker Impedance or the output power you want, I would recommend you this one:
sanwu tpa3116
sanwu tpa3116
Speakers are Boston Acoustic A60 Series II. Just regular bigger bookshelf speakers that are 8 Ohm and sensitivity is at 90. I do not require lots of power. 15W per channel should be plenty as I just need background music when I work on projects.
With this one you can boost the bass:
http://www.ebay.com/itm/TDA7492-Wir...441586?hash=item35f852c8b2:g:NqcAAOSwK7FWhQD4
or this one with on/off switch and bass boost as well:
TDA7492P 2 25W Power Amplifier Wireless Bluetooth 4 0 Audio Receiver Module 40RF | eBay
http://www.ebay.com/itm/TDA7492-Wir...441586?hash=item35f852c8b2:g:NqcAAOSwK7FWhQD4
or this one with on/off switch and bass boost as well:
TDA7492P 2 25W Power Amplifier Wireless Bluetooth 4 0 Audio Receiver Module 40RF | eBay
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Don't rule out the "50w/channel" boards. The generation of Class D chips currently common on these inexpensive amp boards only deliver low-distortion output to about 50-60% of their rated power. You need to knock off more since the rated power is usually into 4Ohm speakers, and yours are 8. With a 19v supply, that probably puts you at about 15 clean watts/channel.
I'd look for a board with a recent CSR Bluetooth 4.x chip on a module, like the last one on your list, or the ones suggested by afterlife2 and JimBeam69. Consider too whether you want AUX input, or if being limited to Bluetooth is A-ok.
I'd look for a board with a recent CSR Bluetooth 4.x chip on a module, like the last one on your list, or the ones suggested by afterlife2 and JimBeam69. Consider too whether you want AUX input, or if being limited to Bluetooth is A-ok.
Thanks for replies. After reading your posts, I am leaning toward the third amp on my list (based on TPA3116). It has 50W per channel and Bluetooth 4.0. It is also simple as it has no external buttons to deal with. I assume that volume is controlled by the phone which is the way I want it.
The 3116 has issues, so that's why I did not recommend it. Look here in the forums or youtube for the reasons why.
The noise issues are a concern for me. I am interested in the 50x50 + 100w sub boards. At first I read the TPA3116 boards with bluetooth had noise issues. Then I read the non BT ones also had noise issues. Unfortunately the TDA7492 doesn't seem to have an option with sub out. Bluetooth is not as important as 1/8th / RCA input. Any suggestions that would cover that?
What sub do you have m0b1liz3? I have a Dayton 1200 sub that has 4 speaker wire inputs, so if your sub has that you're good.
I haven't bought the sub yet. I was going to buy Dayton Audio ND91s and then put a 6.5" sub in the middle in a tri-compartment box. I really just wanted one amp to do all 3 speakers. I have a mobile desktop computer stand with a small desk platform. There is a decent amount of space under the monitor where I could fit an all in one box. I wanted to make it relatively small. Otherwise I would have just continued to use my old 41hz Amp 6 and bigger speakers. I actually find I move the desk / computer around tons now that it is on a mobile platform.
I will be interested to see where this goes.
My mate is a scout leader and he wants me to find a suitable amp for the kids to build into their own old suitcase getto blasters. They have been scrapping drivers from broken getto blasters and raiding all the op-shops.
Its seems hard to find a board that is flexible enough to work for all the kids as some dont have phones with bluetooth. Im thinking this:
1. 50 x 2
2. Simply volume pot
3. 3.5mm IN
4. Bluetooth IN
5. No major turn on or off thump. 5w drivers
Give me a heads uo if anybody knows of finds anything of the sort.
Cheers. Dean.
My mate is a scout leader and he wants me to find a suitable amp for the kids to build into their own old suitcase getto blasters. They have been scrapping drivers from broken getto blasters and raiding all the op-shops.
Its seems hard to find a board that is flexible enough to work for all the kids as some dont have phones with bluetooth. Im thinking this:
1. 50 x 2
2. Simply volume pot
3. 3.5mm IN
4. Bluetooth IN
5. No major turn on or off thump. 5w drivers
Give me a heads uo if anybody knows of finds anything of the sort.
Cheers. Dean.
IMO, the perfect "50wpc" 2ch board with Bluetooth doesn't exist (yet) but two are worth considering:
Sanwu TPA3116d2 2ch with speakerphone:(blue soldermask, about $14)
This is advertised as 50+50wpc. It has Bluetooth input but sadly there doesn't seem to be a version with 3.5mm input. Pretty darn quiet as is but doctormord has posted instructions how to improve it if you have soldering skills. Very good sound quality with no weird noises at low volume. Biggest drawback of this board is that it has speakerphone functionality and IIRC the Bluetooth module is programmed to ring through the speakers at a very high volume. So if you are using your phone as a source be prepared to be blasted by your ring tone if someone calls. The beeps when pressing buttons are also pretty loud if I remember right. My son has this board driving a pair of Yamaha bookshelf speakers with a tablet and he never touches the buttons or gets a call so none of this is a concern.
Sanwu TDA7492p 2 ch (usually has red soldermask, $10-17 depending on version and whether or not you get it with the acrylic case and buttons)
The larger version of this board appears to come in three flavors. One version has both Bluetooth and the 3.5mm input. More than adequate for boom box duty. BUT, as received it has a HUGE turn on thump that throws DC at your drivers for half a second. Again, doctormord has posted a fix for this but you'll need to have the ability to replace two SMD resistors. IIRC, the speakerphone version of this board also has a loud ring. All versions seem to have dip switches for setting the gain and you'll have to experiment to find the best setting for your setup.
There is a smaller version of the 7492p board that I see on eBay now that has dual input but it has a qfp Bluetooth chip on the main board instead of the daughter board with the CSR micro BGA. I have no experience with this one. The concern here is how it is programmed and executed determines how loud the ring tone and button beeps are, and also whether or not there is proper control of the mute function on the amplifier chip to prevent turn on thump. A smaller TDA8932 board I bought that had a similar (and presumably cheaper) Bluetooth IC on board had a really obnoxious Asian woman's voice that announced at FULL volume that "the Bluetooth device is ready to pair" and "the bluetooth device is paired" a second or two later. That one went straight in the trash! That situation may not be the case here but until someone here reviews this smaller & cheaper 7492p board it is buyer beware. Maybe one of you will take the gamble of buying one and reviewing it?
None of these have a volume pot on them. I understand why you want one but if they're in the signal path like most are at this price point, they will likely become noisy. The TPA3116 2ch boards that do have volume pots don't seem to be liked here. I bought one of the 2.1ch YJ boards and it has very annoying background digital noise; I don't know if the 2ch version does or not.
Sorry for the long post. Hope this helps someone make a better informed decision.
Sanwu TPA3116d2 2ch with speakerphone:(blue soldermask, about $14)
This is advertised as 50+50wpc. It has Bluetooth input but sadly there doesn't seem to be a version with 3.5mm input. Pretty darn quiet as is but doctormord has posted instructions how to improve it if you have soldering skills. Very good sound quality with no weird noises at low volume. Biggest drawback of this board is that it has speakerphone functionality and IIRC the Bluetooth module is programmed to ring through the speakers at a very high volume. So if you are using your phone as a source be prepared to be blasted by your ring tone if someone calls. The beeps when pressing buttons are also pretty loud if I remember right. My son has this board driving a pair of Yamaha bookshelf speakers with a tablet and he never touches the buttons or gets a call so none of this is a concern.
Sanwu TDA7492p 2 ch (usually has red soldermask, $10-17 depending on version and whether or not you get it with the acrylic case and buttons)
The larger version of this board appears to come in three flavors. One version has both Bluetooth and the 3.5mm input. More than adequate for boom box duty. BUT, as received it has a HUGE turn on thump that throws DC at your drivers for half a second. Again, doctormord has posted a fix for this but you'll need to have the ability to replace two SMD resistors. IIRC, the speakerphone version of this board also has a loud ring. All versions seem to have dip switches for setting the gain and you'll have to experiment to find the best setting for your setup.
There is a smaller version of the 7492p board that I see on eBay now that has dual input but it has a qfp Bluetooth chip on the main board instead of the daughter board with the CSR micro BGA. I have no experience with this one. The concern here is how it is programmed and executed determines how loud the ring tone and button beeps are, and also whether or not there is proper control of the mute function on the amplifier chip to prevent turn on thump. A smaller TDA8932 board I bought that had a similar (and presumably cheaper) Bluetooth IC on board had a really obnoxious Asian woman's voice that announced at FULL volume that "the Bluetooth device is ready to pair" and "the bluetooth device is paired" a second or two later. That one went straight in the trash! That situation may not be the case here but until someone here reviews this smaller & cheaper 7492p board it is buyer beware. Maybe one of you will take the gamble of buying one and reviewing it?
None of these have a volume pot on them. I understand why you want one but if they're in the signal path like most are at this price point, they will likely become noisy. The TPA3116 2ch boards that do have volume pots don't seem to be liked here. I bought one of the 2.1ch YJ boards and it has very annoying background digital noise; I don't know if the 2ch version does or not.
Sorry for the long post. Hope this helps someone make a better informed decision.
By the way, does anyone know if the 7492P board that has yellow soldermask that was linked above has the turn on thump fixed? I assume it might be a newer rev?
That should be configurable in the phone when you pair it with the BT device. At least my phone allows me to select if I want audio and phone connections to go thru the BT device. Turn the phone option off and all your phone will transmit to the BT device is audio.
BTW: Thanks for a detailed post on available BT amplifiers.
Good point about changing the settings in the phone itself, thanks for mentioning that.
The blue 2ch TPA3116d2 BT 4.0 board that JimBeam, XRK, doctormord, and others have recommended is a very good board as received if you can live without the aux in. And if you are doing critical listening its nice that there is an upgrade to make it even better.
In general, I like the idea of the Bluetooth being a part of the amplifier board since the CSR module has an output that can automate the mute during the turn on (the red 7492p board does this too, the designer just didn't use the right values to keep it muted long enough).
The TDA7492p board sounds ok to me (but I can't hear anything past 13khz or so) but with what I spent on drivers I just couldn't live with the turn on thump. I haven't gotten around to doing the mod to increase the turn on delay, but I imagine once done it would be a good all around board for most people. The fact that it comes in three flavors and you can get the case, buttons and standoffs in a kit is a nice plus.
BTW, I looked some more at the Sanwu board with the yellow soldermask. It appears that it uses a TDA7492 vs a TDA7492P. No idea if it has turn on thump or not. Some discussion of the chip differences are here:
http://www.diyaudio.com/forums/class-d/232217-25w-tda7492-50w-tda7492.html
The blue 2ch TPA3116d2 BT 4.0 board that JimBeam, XRK, doctormord, and others have recommended is a very good board as received if you can live without the aux in. And if you are doing critical listening its nice that there is an upgrade to make it even better.
In general, I like the idea of the Bluetooth being a part of the amplifier board since the CSR module has an output that can automate the mute during the turn on (the red 7492p board does this too, the designer just didn't use the right values to keep it muted long enough).
The TDA7492p board sounds ok to me (but I can't hear anything past 13khz or so) but with what I spent on drivers I just couldn't live with the turn on thump. I haven't gotten around to doing the mod to increase the turn on delay, but I imagine once done it would be a good all around board for most people. The fact that it comes in three flavors and you can get the case, buttons and standoffs in a kit is a nice plus.
BTW, I looked some more at the Sanwu board with the yellow soldermask. It appears that it uses a TDA7492 vs a TDA7492P. No idea if it has turn on thump or not. Some discussion of the chip differences are here:
http://www.diyaudio.com/forums/class-d/232217-25w-tda7492-50w-tda7492.html
Does anybody know if the boards with buttons (play, stop, ffwd, rev, etc) can be used without accessing them? Can board's volume be set for 100% so everything is controlled thru the phone?
My son says he never touches the buttons - controls everything from his phone or tablet. It defaults to 4 notches from full volume at startup (the middle?) and that seems to be adequate for everything he does. He plays them pretty loud sometimes so I think it's plenty for most. There are six beeps at startup at what I would describe as moderate volume, after that it's ready to pair or play music if you had already been paired before.
Just to confirm, this is with regards to this amplifier:
TPA3116 Bluetooth 4 0 2CH Stereo Audio Receiver Power Amplifier Board 2 50W MF | eBay
Just to confirm, this is with regards to this amplifier:
TPA3116 Bluetooth 4 0 2CH Stereo Audio Receiver Power Amplifier Board 2 50W MF | eBay
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I was wondering the same thing about the BT boards that have RCA inputs. When it switches from BT to RCA, is the gain set mid way? I like the idea of no volume knob since my sound card can control the volume or phone with BT.
I have these and they sound good.
Tested with Minimus 7, AR PS2052 and Acoustech PL-980 speakers
Very easy to build.
I have the TDA7492P amp you have listed on ebay.
I also have this unit with the aux input.
50W+50W TDA7492P Bluetooth CSR4.0 Audio Receiver Digital Amplifier Board Sale - Banggood.com
The same as the one in your list but with an aux input.
I bought these for the cases. NO AUX
https://www.aliexpress.com/item/2-2...Wireless-Bluetooth-4-0-Audio/32715744656.html
https://www.aliexpress.com/item/Blu...-Board-Module-for-TDA7492P-2/32717681783.html WITH AUX
And these for the power supplies.
https://www.aliexpress.com/item/96W...-For-Laptop-Notebook-EU-Plug/32613409478.html
The company also has them with US plugs for a few cents more.
Since I've got beaucoup US plug cables I just bought the cheaper ones.
Here is an easy mod to drop the distortion and improve the frequency response. Trevor Marshall - Class D Audio Amplifier Design - TDA7498 Output filters
Tested with Minimus 7, AR PS2052 and Acoustech PL-980 speakers
Very easy to build.
I have the TDA7492P amp you have listed on ebay.
I also have this unit with the aux input.
50W+50W TDA7492P Bluetooth CSR4.0 Audio Receiver Digital Amplifier Board Sale - Banggood.com
The same as the one in your list but with an aux input.
I bought these for the cases. NO AUX
https://www.aliexpress.com/item/2-2...Wireless-Bluetooth-4-0-Audio/32715744656.html
https://www.aliexpress.com/item/Blu...-Board-Module-for-TDA7492P-2/32717681783.html WITH AUX
And these for the power supplies.
https://www.aliexpress.com/item/96W...-For-Laptop-Notebook-EU-Plug/32613409478.html
The company also has them with US plugs for a few cents more.
Since I've got beaucoup US plug cables I just bought the cheaper ones.
Here is an easy mod to drop the distortion and improve the frequency response. Trevor Marshall - Class D Audio Amplifier Design - TDA7498 Output filters
I have these and they sound good.
Tested with Minimus 7, AR PS2052 and Acoustech PL-980 speakers
Very easy to build.
I have the TDA7492P amp you have listed on ebay.
I also have this unit with the aux input.
50W+50W TDA7492P Bluetooth CSR4.0 Audio Receiver Digital Amplifier Board Sale - Banggood.com
The same as the one in your list but with an aux input.
I bought these for the cases. NO AUX
https://www.aliexpress.com/item/2-2...Wireless-Bluetooth-4-0-Audio/32715744656.html
https://www.aliexpress.com/item/Blu...-Board-Module-for-TDA7492P-2/32717681783.html WITH AUX
And these for the power supplies since I can adjust the voltage to match the output impedance
https://www.aliexpress.com/item/96W...-For-Laptop-Notebook-EU-Plug/32613409478.html
The company also has them with US plugs for a few cents more.
Since I've got beaucoup US plug cables I just bought the cheaper ones.
Inline power switch if you want.
5.5x2.1mm DC Connector Switch Power Plug Cord For LED Strip Sale - Banggood.com
No speaker "pop" when turning on, just a beep.
A small pop on turn off. No concern.
Would prefer softer, but tolerable even connected to the PL-980s. 98db @ 1W.
Connects when it comes on, pairing first time , shows as SHUNUO.
Chose the headphone, not the headset for the audio renderer.
I use Foobar 2000 or PotPlayer from Windows, Neutron in Android.
For 4 ohms use 19-20V, 8 ohm 24V.
Search for "TDA7492P spec sheet" and it will give you all the info you could want.
Does my SMSL Q5 sound cleaner? My Lexicon/Adcom/Legacy pre/amp?
At higher power levels, yes. They also have better bass extension.
Changing 2 caps on the $12 board makes them sound the same.
Here is an easy mod to drop the distortion and improve the frequency response. Trevor Marshall - Class D Audio Amplifier Design - TDA7498 Output filters
All this is available on ebay, but I live in Mexico and often ebay sellers will not ship here or charge excessively for shipping.
Nice place to visit. Hope some of this info helps
Tested with Minimus 7, AR PS2052 and Acoustech PL-980 speakers
Very easy to build.
I have the TDA7492P amp you have listed on ebay.
I also have this unit with the aux input.
50W+50W TDA7492P Bluetooth CSR4.0 Audio Receiver Digital Amplifier Board Sale - Banggood.com
The same as the one in your list but with an aux input.
I bought these for the cases. NO AUX
https://www.aliexpress.com/item/2-2...Wireless-Bluetooth-4-0-Audio/32715744656.html
https://www.aliexpress.com/item/Blu...-Board-Module-for-TDA7492P-2/32717681783.html WITH AUX
And these for the power supplies since I can adjust the voltage to match the output impedance
https://www.aliexpress.com/item/96W...-For-Laptop-Notebook-EU-Plug/32613409478.html
The company also has them with US plugs for a few cents more.
Since I've got beaucoup US plug cables I just bought the cheaper ones.
Inline power switch if you want.
5.5x2.1mm DC Connector Switch Power Plug Cord For LED Strip Sale - Banggood.com
No speaker "pop" when turning on, just a beep.
A small pop on turn off. No concern.
Would prefer softer, but tolerable even connected to the PL-980s. 98db @ 1W.
Connects when it comes on, pairing first time , shows as SHUNUO.
Chose the headphone, not the headset for the audio renderer.
I use Foobar 2000 or PotPlayer from Windows, Neutron in Android.
For 4 ohms use 19-20V, 8 ohm 24V.
Search for "TDA7492P spec sheet" and it will give you all the info you could want.
Does my SMSL Q5 sound cleaner? My Lexicon/Adcom/Legacy pre/amp?
At higher power levels, yes. They also have better bass extension.
Changing 2 caps on the $12 board makes them sound the same.
Here is an easy mod to drop the distortion and improve the frequency response. Trevor Marshall - Class D Audio Amplifier Design - TDA7498 Output filters
All this is available on ebay, but I live in Mexico and often ebay sellers will not ship here or charge excessively for shipping.
Nice place to visit. Hope some of this info helps
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