Tone Control 2.1 CH Professional Hifi Stereo Subwoofer Pre Amplifier JRC2068 Front Tone ZK-PRO1

Tone Control 2.1 CH Professional Hifi Pre Amplifier JRC2068 ZK-PRO1
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Professional Hifi Front Tone 2.1ch Stereo Subwoofer Operational Amplifier
JRC2068 OP-Amp Balanced / Unbalanced Output
Brand: Original Wuzhi Audio
Model: ZK-PR01
Name: Front tone board JRC2068
Input voltage: 12-30V DC, (cannot input AC power)
Working current: 28mA
Audio input interface: XH2.54-3P, free 3P double ended shielded wire with a length of 30cm.
Audio differential/balanced output interface:
Three XH2.54-3P terminals for left, right, and subwoofer,
Audio single ended/unbalanced output interface:
Two XH2.54-3P terminals for left and right stereo and subwoofer,
it can be connected to pure downstream power amplifiers such as ZK-1602 and ZK-3002.
Two free 3P dual head audio cables.
Operational amplifier chip: Six original JRC2068D
Distance between potentiometer 23.5mm.
1. Change R53 resistance value (factory default 10K, 0dB)Left amplification factor=R53/10K,
which can adjust the left gain size. For example, adjusting to 20K will double the gain.
2. Change R9 resistance value (factory default 10K, 0dB)The amplification factor on the right side is R9/10K,
which can adjust the gain on the right side. For example, adjusting it to 20K will double the gain.
You can also fine tune the resistance value of R53 R9 to achieve balanced output of the left and right speaker channels.
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