The Koch Jupiter Small stack: 

The KOCH JUPITER HALF STACK:

Wide, Spacious & Dynamic

For players looking for a larger-than-life, three-dimensional sound that effortlessly fills the room, the Koch Jupiter Half Stack is the perfect choice. This impressive rig pairs the responsive Jupiter Head with our legendary Koch KSC212 OB (Open Back) cabinet.
While the Small Stack excels in compact, forward directness, this 2x12 Half Stack delivers a spacious, airy dispersion that brings your guitar tone to life like nothing else.

1. The Magic of the KSC212 Open-Back: Featuring a rear panel with oval ports, this 2×12 cabinet projects sound both forward and backward. This creates a natural, airy soundstage that makes your rig sound much larger than its footprint. Loaded with two of our custom VG12-60 speakers, it delivers incredible dynamic range and a rich, balanced vintage voice.
   

1. Built for the Big Stage: Backed by our ATR tube-hybrid design, the Jupiter Head has more than enough muscle and clean headroom to drive both 12" speakers to their absolute potential. Whether you are rolling out shimmering, pristine cleans or kicking in the 'Hot' channel boost for a roaring lead tone, this Half Stack delivers a massive wall of sound without the back-breaking weight.

The Ultimate Grab-and-Go Gig Rig

Why compromise between lightweight portability and the iconic visual presence of a separate head and cab?
The Koch Jupiter Small Stack pairs our highly versatile, 11 kg Jupiter Head with the premium, compact Koch KCC112-BB60 cabinet.

This combination creates an incredibly stylish, space-saving mini-stack that looks beautiful on stage or in the studio while remaining a breeze to transport in a single trip to the car.

1. Perfect Synergy: The 1×12 cabinet is loaded with our proprietary, custom-voiced VG12-60 speaker. It is engineered specifically to translate the touch-responsive dynamics of the ATR (Authentic Tube Response) power section into tight lows and sweet, singing highs.

 

1. Home & Studio Friendly: Thanks to the built-in continuous Power Dimmer on the Jupiter Head, you can run your tubes hot for rich saturation at whisper-quiet volumes. For silent tracking, simply run the speaker-emulated recording output straight to your DAW with the cabinet bypassed.

TAke A CLOSER LOOK

ATR Athentic Tube Responce

At the heart of the Jupiter 50 Head is our proprietary ATR (Authentic Tube Response) technology. By placing a 12AX7tube in both the preamp and power stage, this hybrid design delivers the organic sag, natural compression, and touch-responsiveness of a full-tube amp at any volume—perfectly blending genuine tube warmth with solid-state reliability.

KCC112  BS60

Built with an incredibly robust 11-layer Birch Plywood shellusing wood-to-wood slot joints glued under pressure, it provides rigid, rock-solid road reliability. Koch pairs this shell with a vibration-free MDF baffle to produce a tight low-end, highly colorful mids, and silky smooth highs.

KSC212 OB BB180

The Koch KSC212 OB is a high-performance 2x12 cabinet designed to deliver exceptional sound for a wide range of applications. Its open-back design with oval ports provides optimized tuning for a rich and balanced tone.

SPECIFICATIONS:

JUPITER 50 HEAD

Amp configuration 

1. 20W Hybrid ATR amplifier (ATR = Authentic Tube Response)
   
2. 1x 12AX7 tube in the pre-amp
3. 1x 12AX7 tube in the power amp
   
4. High Voltage Mosefet power control

The TONE

1. Three foot-switchable channels: Cool (clean), Hot (overdrive) and Hot Gain Boost
   
2. Volume control for the Cool channel and separate Gain and Volume controls for the Hot channel
3. Passive Bass-Mid-Treble tone controls for both channels
   

Connectivity and OUTPUT

• Spring emulated reverb with Volume control
  
• Dimmer (power Control) for continuous control of the output power between 0W and 20W
  
• Buffered serial effects loop
• Recording output with passive speaker emulation filter
• Speaker on/off switch for silent recording
• Extension speaker jack
• 1x 10” Jensen Falcon C10-40 speaker
  

HARDWARE & HANDLING

​-Two button footswitch (not included) with:
* Channel select
*  Gain Boost 

HEAD DIMENSIONS & Weight

• Dimensions 45(w) x 42 (h) x 23.5 (d) cm
  
• Weight ca. 12 kg
  

KCC112 Cabinet

• Ported 1x12" Cabinet
• 12" VG12 60 speaker
• 60 Watt
• Impedance 8 Ohm
• ​11-layer Birch plywood
• Slot joints construction, glued under pressure
  

CABINET DIMENSIONS & WEIGHT

• 54,5(w) x 30,5(h) x 51,5(d) cm
  
• Weight 19.3 kg
  

KoCH KSC212 OB CABINET

• 18 mm, 13 ply baltic birch plywood
• All glued woo-to-wood dado joints
• 2×12 cabinets, one piece baffle
• 2x Koch VG12-90 speakers​
• Heavy Duty corners and handles

• Koch custom Green vinyl
• Internal wiring: Koch Dynacon speaker cable
• Comes with 5ft/1,5m Koch Dynacon speaker cable
• Powerhandling: 1 x 120W RMS or 2 x 60W RM

DIMS & WEIGHT:

• L 76 x W 36 x H 69 d (cm)
• Weight: 29 kg