BRZHIFI L1B Class A Bluetooth Preamplifier (PA34)Product Name: Class A Bluetooth Preamplifier Model : L1B brand: BRZHIFI Colour : Black Warranty: 12 Months The preamp is known for its superior sound quality, using a single ended circuit design allows it to maintain a constant output voltage and reduce distortion & noise. Capable of reproducing high quality sound across the range from low bass to the high treble frequencies accurately. Features: Individual turning knob for Treble, Bass, and Sub