Mapletree Audio Design
Ear+ Purist HD Stereo Headphone Amplifier

 

  • Heavy duty power supply and output transformers for increased power output and extended bass response with low distortion.
  • Para-feed headphone output circuit drives 32–300 Ohm impedance phones including the Sennheiser HD580/600/650. 
  • All point-to-point wiring. 
  • Tube complement: 2 x 12B4A and 1 x 5751/ECC83/12AX7.
  • Ultra high-speed HEXFRED recitifier diodes and Alps volume control.
  • Passive preamp output jacks and dual line input jacks for system patching.
  • Kit includes punched, painted chassis, bottom cover plate, detachable line cord, all parts, tubes, hardware, silver-plated Teflon wire, solder, knobs. and a step-by-step instruction manual with separate wiring diagrams. Only a few standard tools and a soldering iron are required for construction. 
  • Premium passive components include Black Gate capacitors in signal path, Tantalum film plate resistors, and a Noble or Alps plastic element volume control. 
Specifications: Input resistance:  100 kOhms. Headphone output impedance:  7 Ohms. Sensitivity: 0.3 V for 10 mW output. Output power: 100 mW. 

Email enquiries to Lloyd Peppard at info@mapletreeaudio.com or phone (613) 387-3830