Quad QC-24

The Quad QC-24 is a wonderful $1,250 tube preamplifier from one of longest-lived, most famous names in High-End audio. It is a Golden Ear Award winner in The Abso!ute Sound. Our mod takes it to the next level and allows it to compete with anything under $3,000.

• Lower S/N ratio with blacker silences, better low-level detail and 3D ambiance retrieval
• Smoother yet more detailed presentation, better macro dynamics
• It seems to play louder, with improved microdynamic contrasts
• Tonal balance is more coherent from top to bottom
• In addition, the midrange is a little more liquid than the stock machine's
• Imaging is more defined, soundstage depth is enhanced
• Bass extension and impact are dramatically improved, weight and authority built out, sounding more like solid-state in this area 

• 4 x small EAR brand Sorbothane isolation feet
• 2 x sheets of SoundCoat chassis damping material
• 3 x pairs of Vampire CM-1F/CB copper body, direct gold-plated RCA input jacks
• 4 x Auricap signal path, metalized polypropylene coupling capacitors
• 4 x MultiCap RTX Series polystyrene and tin-foil coupling bypass capacitors
• 4 x Film Cap power-supply bypass caps
• 4 x upgraded coupling bypass and power-supply capacitors
• 8 x Riken Ohm ½ and one watt signal path 1% carbon comp. resistors (gold-plated leads)
• DH Labs Revelation Series pure 99.99% silver Teflon-insulated input/output wire
• Fou4 x IR Hexfred ultra-fast soft recovery diodes
• TRT WonderSolder used throughout