Review on 🔵 DROK Blue~Tooth Amplifier Board 4.1 | Digital 2 Channel 50W+50W | Wire~Less BT 3.0 4.0 | Speaker Amp with Case by Tommy Willis

From an audiophile point of view. This is my first experience with digital amplification and this product made me buy it. *This overview can serve as a technical specification and operating instructions* Assembly: The electronic board is packed in an anti-static electronics bag. The heatsink is not attached, but you glue it to the amplifier chip already on the underside of the heatsink with the supplied adhesive. The Plexiglas is protected by a removable adhesive paper. In general, assembly is easy, but there are no instructions. The compiled product photos on Revain helped. Connections: The current peak must be in the positive center. Reverse polarity protection works, but if connected incorrectly the board will get very hot. If the power is correct, the red LED lights up. Used power adapter 12V, 800mA (not included). When connected via BT, the LED will be solid, and when the input is 3.5mm, the LED will flash. The usable BT distance is about 30 feet as it should be. The 3.5mm line-in connector looks gold plated. The speaker's screw terminal blocks ensure a reliable connection. The screw presses against a strip of metal that makes direct contact and holds bare wires, speaker pins, etc. Operation: The electronic buttons offer a comfortable click feeling when using. They might be a bit close together, but thumbs shouldn't be a problem. Similar to other BT electronics, a confirmation tone will sound when the maximum volume is reached. Other buttons work as shown in the picture. just tested the switch between Line-In and Blue Tooth. Specifications: Frequency response was measured using 5.25" two-way woofers and a subwoofer/satellite configuration (two-channel passive subwoofer crossover at 110 Hz with a 5.25" DVC passive subwoofer, nominal 6 ohms system impedance) tested. The high/mid frequencies aren't harsh and the bass is pleasantly punchy. I was using the tone generator app over BT and could clearly hear audio below 40Hz to at least 17kHz. Even at maximum volume, the amplifier plays loud without clipping. Speaker clipping can occur depending on your speakers, but in the short time I've been using it there hasn't been an amp. This amplifier is suitable for the sound system in the master bedroom as well as for a small living room with a stereo. I bought it to connect to a digital-to-analog converter that connects to the PCM, the TV's 2-channel digital optical output. This is a simple stereo amplifier with no remote control to connect to the line-in, but via BT you can control volume / next track / previous / pause functions from your tablet, smartphone, etc. If this device lasts many years, come on I will consider it an excellent value. I ask the seller to post detailed audio specs such as continuous average power output (RMS) as well as peak power (50W?), % THD at 1kHz, 4ohms. I would also like to know the maximum recommended current at a given voltage i.e. 12V.