User`s manual

GAIN: 24-Position rotary switch (2.5dB per step) for exact, resettable gain.
• Minimum Gain: +7.5dB (6 o’clock position)
• Maximum Gain: +65dB
• Gain Settings: +7.5, 10, 12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 37.5,
40, 42.5, 45, 47.5, 50, 52.5, 55, 57.5, 60, 62.5, 65dB.
• Interchannel Matching: ±0.1dB (any channel, any box, any gain setting)
CMRR @ 50Hz: 110dB [gain = +60dB]
CMRR @ 10kHz: 100dB [gain = +60dB]
Maximum Input: +21dBu [gain = +7.5dB]
Max. Output into 10kΩ: +29dBu [ ≤ 0.004% thd]
Max. Output into 600Ω: +27dBu [ ≤ 0.004% thd]
High Frequency Limit: 300kHz [+0/-3dB, gain = +60dB]
Pin 2 (+)
Pin 3 ( - )
Tip (+)
Ring ( - )
Main
Out
Aux
Out
Pin 2 (+)
Pin 3 ( - )
BLOCK DIAGRAM
*NOTE: The above JR4 information also applies to the mic preamp channels of the JR2/2.