Karaoke audio PerAmp,Model No.:DSP-908.

parts of the musical channel
Frequency range of the main sound channel: 20Hz~50Kh (±dB)
Frequency range of center adjustment sound channel: 25Hz~15KHz (±dB)
Frequency range of heavy bass sound channel: 15Hz~180KHz (±dB)
Total harmonic distortion: 0.10%
S/N  Ratio: ≥80 dB
Degree of separation: ≥60 dB (1 KHz
Max in put level of line: ≥1.5V
Max out put level of line: ≥2V
Range of the main sound channel to adjust tone from high to low: -10dB~+10dB

Max in put level of mike: ≥150mV
Max out put level of mike: ≥1V
S/N Ratio of mike (State of direct connection): ≥72dB
Input impedance: 600Ω
 Adjustment tone range from high to low of mike: -10dB~+10dB
Common specification
Power: -220±10%
Overall Dimension (length×width×height): 482×286×55mm
N Weight: 4kg