Description:
THD + N <0.05%
SNR> 100DB
Frequency response: 20HZ -20KHZ -0.05DB
Input voltage: between AC20V to AC28V (You can also use AC12V-0-12V without the middle wire)
Input transformer power> 5VA
Quiescent Current: 25 MA
Voltage gain = GAIN 10 times
With potentiometer
FFT test: test platform AP SYS TWO, the output voltage signal: 1.06V
Input transformer power> 5VA
Quiescent Current: 25 MA
Voltage gain = GAIN 10 times
With potentiometer
FFT test: test platform AP SYS TWO, the output voltage signal: 1.06V
Frequency response 20HZ-25KHZ (-0.05 DB)
10K FFT test:
Note:
It is recommended to use P9 front-end with L series back-end or MX series pure back-end amplifiers, especially with L12-2, L20, L20SE, L15, etc.
If the P9 front-end is paired with MX50SE or L7, L20V7 amplifiers, it is recommended to adjust the amplifier gain. L7,MX50SE, L20, Change the 330 ohm resistor on the amplifier to 470 ohms.
It is not recommended to pair PREAMP9 with other back-end circuits not produced by LJM, as it may not achieve the best combination effect. Especially circuits like JLH1969 are not suitable for pairing with P9 front-end
If the P9 front-end is paired with MX50SE or L7, L20V7 amplifiers, it is recommended to adjust the amplifier gain. L7,MX50SE, L20, Change the 330 ohm resistor on the amplifier to 470 ohms.
It is not recommended to pair PREAMP9 with other back-end circuits not produced by LJM, as it may not achieve the best combination effect. Especially circuits like JLH1969 are not suitable for pairing with P9 front-end
Package:
1 x PREAMP 9 Preamplifier Board with potentiometer
On 30-Jul-2026 at 22:10:29 EDT, seller added the following information: