Johnson-amplification JM60 User Manual download pdf (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 Ωs

Power Amp Output Stereo: 120 Watts RMS. (60 per channel) into 8 Ωs

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.

Appendix

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Johnson-amplification JM60 User Manual Page 29