Class-T Bluetooth Power Audio Amplifier - 120W Mini Dual Channel Sound Stereo Receiver Box w/USB, RCA, 12V Adapter - For Subwoofer Speaker, Home Theater, PA System, Studio Use PFA220BT

Cumple muy bien, lo conecte a 6 bicinas para hambientar una area grande y funciona excelente..

Thought it was bigger not do clear but it works

Funciona increiblemente bien,.100% recomendable

- I'm not sure where they got the 120W specification. The sound output is much less in my opinion. The power supply output is rated at 2500mW@12V which is 30W so the amp can be max 30W if it's 100% efficiency. That's about what it really sounds like to me. The sounds seems clear and good. - The tone controls made some static while adjusting them, especially the treble. I cranked them back and forth a few times and it seemed to clear up. - The bluetooth seems to work OK with my Ubuntu Linux laptop. It was detected as a "headset", and no problems getting it to work. - I tested the RCA jacks on the back and they are OK, although they appear to be slightly crooked. - I don't know what to do with the SD and USB inputs. The documentation is very brief. Maybe one is just supposed to know this sort of thing. I'll probably keep the unit as it meets my needs with the bluetooth amplification of my laptop and it's loud enough in spite of the power rating issue. *********** Update 2016-0219: I sent the unit back last week. The bluetooth quit connecting reliably and when I tried the line input, it had lost a channel. It also did not power up reliably. It sometimes took several power cycles to get it to come on.

Great sound and functionality! Money well spent.