The Supro 1777 Galaxy 300W 4×12 guitar extension cabinet is engineered with a hybrid, oversized ‘half-back’ design. This unique configuration features a partially open, top section angled above a closed-back, isolated lower compartment, blending the tonal characteristics of vintage open-back cabinets and the low-end punch of sealed enclosures. The Galaxy 4×12 is designed to operate in two modes – as a mono 4×12 (300W) or as two separate 2×12 cabinets (150W each) in bi-amp or stereo configurations, offering 16-ohm operation in the latter. Loaded with Eminence CV75 speakers, the Galaxy series captures the essence of classic British tone reminiscent of the revered, early 80s UK V30 speakers.
The Eminence CV75 speakers provide a 102.2 dB sensitivity and are selected for their ability to deliver a distinctive, high-gain tone. With an 8-ohm impedance in single mode and 16 ohms in stereo or bi-amp mode, this cabinet is versatile for different amplifier configurations.
Key Specifications
- 300W power handling for robust performance
- Loaded with Eminence CV75 speakers for authentic British sound
- Switchable between 8 ohms for single operation or 16 ohms for dual channel use
- Delivers high sensitivity at 102.2 dB for clear, powerful sound projection
- British tone with the warmth of UK vintage speakers




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