This is a very good product for a good price but needs a little bit of modification to be perfect

This thing is great pairs fast & easy and very loud

adapter I had laying around with no problems.-- Negatives1: Audio has a noticeable scratchy sound, as well I can hear audible pulses in the background when it's not playing audio.----Soldering a small length of copper wire, solid or twisted pair on the Bluetooth antenna gets rid of both the pulses and scratchy sound.2

I have it pushing a pair of 6" speakers and it works well.

Pros: small, class D so no heat, super easy to install and use, plug and play, inexpensive, great output

The output is amazing (I stopped regarding numbers as there is NO standard in the industry) adjustable gain lets you hook to anything and output is sufficient to drive full size speakers

I do not need the greatest audio output so for my intended

It has a good range on the bluetooth and is very easy to pair with other bt4.0 compatible devices.

I think this is going to make a great device for a science project!

Awesome device, plenty of power to light up my whole yard (for sound ,that is.)

This little device receives Bluetooth very well and the amp works great with a switching power supply.

The unit gets hot but not bt signal or indicating lights never tur on, so im returning this defective device...

It has good sound quality and can be very loud, however the Bluetooth range is poor

It also makes good crisp sound come out of some older speakers that aren't the best quality

Easy to use has good sound quality for what I want and pairs up really quickly.

Did not work good , horrible quality

The sound quality is decent and there is very little feedback when the music is on.

I then realized i had to ground the amp, i soldered a wire to the bluetooth antenna and the other end to a L bracket inside the the speaker box i made and the static drastically decreased and can hardly hear it at all.

This is a great little amp for anyone looking for a simple, inexpensive, good sounding bluetooth amp

dies , your Amp is pretty much waste until you figure out the Line Ins

great little amp works but some stuff puts out a little buzz noise when nothing is playing doesnt bug

This little device receives Bluetooth very well and the amp works great with a switching power supply.

The unit is very compact, about the size of a business card, and I appreciate the little stand off "feet" provided with the board

The unit gets hot but not bt signal or indicating lights never tur on, so im returning this defective device...

It could be that I got a one-off defective unit, so I think I will try a replacement before completely giving up on this device (and spend more money on another solution - sigh).

Perhaps I have a bad unit, but I'm guessing it's just poor engineering and for the use case (playing audio constantly when on

These units are great for building custom one of one Bluetooth speaker setups

great little amp works but some stuff puts out a little buzz noise when nothing is playing doesnt bug

i bought two of these and one works great, but the other doesn't work at all

Was working great until one day it just stopped working

When the bluetooth stereo died in my workshop, I decided to build my own and this board worked wonderfully

Good, simple, works, does the trick.

Why do all of these cheap bluetooth audio receivers have a lot of static noise when connected?

I used the amp in a portable Bluetooth application- it worked flawlessly

I bought 2 of the BOSS Audio BRS40 4" speakers that were very cheap and made a pretty crude wooden box and placed the amp inside and bam you got a cheap loud bluetooth speaker perfect for small to medium spaces.

Has an annoyingly loud bluetooth start up sound and the bluetooth chip has a low compatibility with bluetooth inputs (i.e. not compatible with PC bluetooth output devices or old ipod devices.

It has some buzzing or hum but the bluetooth is very good.

Overall this is a decent board, but if you care about audio quality be warned.

This little board is amazing , Bluetooth is flawless , the output to my home speakers is way more than I expected , it's a great product.

For $16 (at the time of this writing), the board is a steal: plenty of volume, clean sound and easy installation.

So I un-soldered the defective connector and took one off of the defective board.

This board is also louder than the original card and sound quality is excellent with my speakers.

Sometimes it sparks and makes a loud popping sound like the speaker's going to blow

Aside from that the sound and quality this board puts out is excellent and worth every dollar.

It also makes good crisp sound come out of some older speakers that aren't the best quality

The sound is excellent if you ignore the loud startup noise

The sound was loud, clear and without any imperfections.

Using two known good power supplies, one the recommended 12v 5a, LED indicators do not light, and bluetooth does not show

8 ohm's subwoofers and x3 4-ohm tweeters and still put out enough power to almost blowing them

I would recommend a good power supply and use a 2200uf 25V capacitor like Nichicon

I haven't even used both little white switches up yet because I already have enough power coming out of this little thing

I like mine very well as it has enough power to push some 6x9 car speakers I had laying around

Worked right out of the box using cheap computer speakers and 8 AA batteries.

Sometimes it sparks and makes a loud popping sound like the speaker's going to blow

I bought 2 of the BOSS Audio BRS40 4" speakers that were very cheap and made a pretty crude wooden box and placed the amp inside and bam you got a cheap loud bluetooth speaker perfect for small to medium spaces.

This really is a good amp for the price and has almost everything you would need for a small speaker system like mine

Great for portable speakers, limited on Bluetooth distance

Two issues that I'm having with it: 1) Buzzing noise emits from speakers.

But unless your bluetooth is right next to your phone, it has a weird static noise that will drive some people crazy.

The sound is excellent if you ignore the loud startup noise

This board has lot of static noise and the power ON produces a loud tone

Significant electronic noise - 3 Stars for that.

Any amount of beeping when you do anything with an amplifier is too much beeping, but these beeps are also inexplicably loud

Works well and the bluetooth connects fast, but I would rather they leave the beeps silent on the next board.

It would be fine except for the ridiculous noise floor and the beeps it makes when you turn it on

The horrendous full volume beep indicating Bluetooth connection is somewhat less annoying than the

Tried two of these boards, and both exhibited a loud POP of distortion when pausing music

Sometimes it sparks and makes a loud popping sound like the speaker's going to blow

The only drawbacks, and they might be attributable to bridging it, are that it has a very low static-like hiss when there is no music and a very loud "pop" when I turn off the power

I also had to change a resistor inside the unit two Lower the loud popping sounds that it makes during power on and off