Product function introduction

The B981 is a powerful 8-channel high-power preamplifier which has dual-sound input with a selector switch.
The product provides an independent 3.5mm stereo earphone jack which can perfectly drive a variety of high-impedance professional monitor earphones.
Each channel can drive 16Ω-600Ω and provide 8 stereo channels for output.
There are four independent volume knob adjustments to control the 8-channel for simultaneous level signal output presenting the rich sound quality
well-balanced bass clear high frequency and no other signal popping phenomenon
and ensuring lossless and undistorted sound.
It can provide +20dB high gain through any line level signal source allowing running through longer cable lines or buffering" to solve low volume problems.
You can use the product to connect line level signal source and power amplifier as a volume controller.
The RCA socket can match almost all other product interfaces. The product is powered by an AC AC9V transformer.

Product parameters

Input impedance: 100K Ohm
Maximum input level: +14 dBV
Output impedance: 47 Ohm per output channel
Frequency response: 20 Hz - 20K Hz
Signal to noise ratio: > 107dB
Total harmonic distortion: < 0.08%
Intermodulation distortion: < 0.01%
Signal input: two sets of stereo RCA socket
Signal output: six sets of stereo RCA connectors and two sets of 3.5mm stereo earphone jack
Product power supply: AC9V-12V
4 independent channel stereo level volume output controlling knobs
Product net weight: 0.68kg
Packaged product weight: 0.82g
Product dimensions: length 145mm X width 112mm X height 42mm
Packing dimensions: length 260mm X width 185mm X height 65mm

Kit list
1 X B981 Professional 8-channel preamp signal-amplifier speaker distributor
1 X AC9V Power adapter (US standard) line length 100CM"