Vacuum Tube Sound for the 21st CenturyMapletree Audio Design offers a unique range of products designed and hand crafted by Dr. Lloyd Peppard, a retired electronics engineering professor. The goal is to increase your enjoyment of recorded music through the use of vacuum tube amplification and signal processing.
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Monobloc Power Amplifier - 50 W with
KT88s running class AB1 ultra-linear with fixed
bias. Triode mode switch. Built on a stainless steel Dynaco
Mk III chassis with Mullard topology driver
circuitry (6SJ7 voltage amplifier and 6SN7GT long-tail phase
inverter) and Dynaco spec output and power transformers.
WIth premium passive components and a very stiff power
supply, the sonics are effortless and open, espeicially
noticable on high level transients. Available for 240 VAC (
Super Stealth monobloc power
amplifier. Using the EH 6V6GT tubes in class AB
ultra-linear push-pull, the Super Stealth delivers
a clean 8 W, making it suitable for a wide range of
Super Stealth SE monobloc power amplifier. The special edition of the Super Stealth includes provision for 12 V or 6 V driver tubes, dc balance adjustment for output tubes, and bias adjustment.
Special Red octal driver module for Dynaco Stereo 70 power amplifiers. A drop in, point-to-pointwired driver board using Mullard driver topology with 2-6SJ7 and 2-6SL7GT tubes.
Line and Speaker Routers
LR 1 Line Router
Any combination of 6 or less I/O lines is possible. Design it yourself to suit your needs.
Ideal for switching line sources between headphone amplifier or preamp or adding additional line inputs to preamp.
Appearance as shown for LR 1 Pro below.
LR 1 Pro Balanced Line Router
Any combination of up to 3 inputs and/or outputs.
Neutrik XLR connectors.
SP 1 Speaker/Amplifier Router
Two power amplifiers to one speaker system or one amplifier to two speaker systems.
Bi-directional (either configuration can be used in reverse direction if needed).
ETO (Engineered To Order): Expanded I/O capability can be provided . Prices available on request.