Johnson Amplification JM60 - Manual (Page 29)

Specifications
Inputs
Input: 1/4” unbalanced
Input Impedance: 470 k Ohm
FX Return: 1/4” Stereo TRS
Return Impedance: 15 k Ohm
Maximum Return Level: +18 dBu
Outputs
External Speaker: (JM60 only) 1/4” unbalanced - 60 Watts output
FX Send: 1/4” Stereo TRS
FX Send Impedance: 680 Ohm
Maximum Send Level: +18 dBu
Headphone: 1/4” Stereo TRS
Headphone Impedance: 10 Ohm minimum
Controller Connections
J3 Footswitch: 1/4” TRS
J8 Controller: 5 pin DIN
Preamp/Power Amp
Tube: 12AX7
Plate Voltage: 240 Volt
Power Amp Output Mono: 60 Watts RMS. into 8
Ω
s
Power Amp Output Stereo: 120 Watts RMS. (60 per channel) into 8
Ω
s
DSP Section
Frequency Response: 20-20kHz +/-0.5 dB
Signal to Noise: Greater than 96 dB (A-weighted) ref=max signal, 22kHz measurement bandwidth
A/D Converter: 20 bit, 128x Oversampled
D/A Converter: 20 bit, 128x Oversampled
Sampling Rate: 46.875 kHz
Power
Power Requirements: 100, 120, 230 or 240 VAC 50/60 Hz
Power Consumption: 220 Watts
Memory Capacity
Factory: 27 Presets
User: 27 Presets
JM60 Dimensions: 11” (D) x 23” (W) x 18” (H)
JM60 Net Weight: 45 lbs.
JM120 Dimensions: 11” (D) x 27.75” (W) x 18” (H)
JM120 Net Weight: 61 lbs.
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Appendix