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Guyatone HPC-1

Guyatone HPC-1

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This product is Vintage or Discontinued

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Page last updated Feb 02, 2026

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The HPC-1 Bi-Phase Chorus Effect Unit by Guyatone

The Guyatone HPC-1 is a rare vintage bi-phase chorus effect unit from Guyatone, most likely dating back to the 1980s and made in Japan. It isn’t a typical stompbox but a half-rack style chorus processor with two separate modulation paths, allowing for rich and smooth stereo chorus textures that are wider and more complex than many single-phase units. It features straightforward controls for Rate, Depth, Balance, Filter, and Preset offering versatile chorus tones from subtle shimmer to lush modulation. The unit is known for its quiet operation and musical response, often prized by collectors and vintage gear enthusiasts. Originally designed to run on a 9 V DC supply, it also offers input/output jacks and footswitch options for easy integration into rig setups. Because it’s not common, complete units with original packaging are increasingly sought after by players and collectors alike.

Specs:

• Type: Bi-Phase Chorus Effect (Half-rack)
• Brand: Guyatone
• Model: HPC-1
• Era: 1980s (vintage)
• Power: DC 9 V input
• Effect On/Off
• Preset On/Off
• Rate, Depth, Balance, Filter
• Preset Rate & Depth
• Input jack
• Outputs A, B, Direct
• Two footswitch jacks
• Dual-phase modulation for stereo widening & rich chorus textures
• Runs off standard 9 V (adapter)

Product specs

Power	9V
Bypass	true bypass
Analog/Digital	analog
Mono/Stereo	mono

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