Koch J45/C112B Jupiter Guitar Amplifier – 45W Combo, 12” Speaker, 3 Channels & ATR Technology

The Koch J45/C112B Jupiter is a powerful 45W hybrid guitar amplifier combo with an authentic tube sound thanks to Koch's patented ATR (Authentic Tube Response) technology . This technology simulates the characteristic saturation of a tube output stage, while providing the amplifier with solid-state power amplification for reliability and stability. With 2x 12AX7 tubes in the preamp circuit and a custom-designed 12” Koch VG12-90 speaker , the Jupiter delivers a full, rich sound – from crystal-clear clean to sizzling high gain.

The Jupiter features three switchable channels: Clean, Overdrive, and High-Gain Overdrive, each with its own gain and volume controls. The three-band EQ with a contour switch provides additional tone-shaping options. A built-in spring reverb, a buffered effects loop, and a speaker-emulated output make this combo suitable for studio and live recording. A dimmer allows you to adjust the output power for optimal saturation at any volume.

Specifications:

• Type: Hybrid guitar amplifier combo
• Power: 45W
• Technology: ATR (Authentic Tube Response)
• Tubes: 2x 12AX7 (preamp and poweramp simulation)
• Speaker: 1x 12” Koch VG12-90 (custom designed)
• Channels: 3 (Clean, Overdrive, High-Gain)
• Regulations:
• 2 sets of Gain and Volume
• 3-band EQ with contour switch
• Reverb: Spring type with front panel controls
• Dimmer: Stepless control of output power
• Buffered effect loop
• Speaker outputs: 4, 8 and 16 Ohms
• Speaker-emulated output with passive filter
• Included: 2-way footswitch (channel select and boost/reverb)
• Dimensions: 54 x 46 x 26 cm
• Weight: 19.1 kg

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