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Hand-built Vacuum Tube Amplifiers and Preamplifiers for the the discriminating music lover.

Tube Preamps

Hand built 12AX7-based vacuum tube stereo preamplifier with tube power supply. Works well with solid state and tube amplifiers alike. Features (2) 12AX7's, (1) 5AR4 rectifier, and (2) OD3 Regulator tubes.

  • Front panel volume control and source selector
  • Rear panel "Output Level" control (to match the input sensitivity of your amp(s))
  • (1) 5AR4 (GZ34) Rectifier Tube (included)
  • (2) OD3 (VR150) Regulator Tubes (included)
  • (2) 12AX7 Line Stage tubes (included)

A robustly built stereo Single-Ended amplifier utilizing the KT88 Pentode in either Triode or Ultra-Linear mode producing up to 18 watts per channel.

  • JJ Blue Glass KT88 tubes (included)
  • JJ 12AT7 (included)
  • Triode/UL mode switchable
  • Audyn coupling capacitors
  • 4/8 ohm speaker output

This Stereo push-pull amplifier has been designed from the ground up to give the closest sound to a SET while using a push-pull output stage. Fewer and higher end components provide a transparent 3D soundstage and "meat on the bones" midrange that only SET designs are known for.

  • Class "A" Push-Pull operation
  • Cathode "Auto-Bias" requires no adjustments and prevents Bias failure issues
  • True Triode driver and phase splitters
  • Minimal signal path and less gain stages for increased transparency
  • Triode/UL mode (switchable)

Stereo line preamplifier using the venerable 6SN7 octal triode in a re-designed Cathode Follower circuit. Features 4 sets of stereo inputs, and 2 sets of stereo outputs. Variable gain up to 15 db. 5U4GB tube-rectified power supply for the discerning audiophile!

  • Up to 15 db of gain (variable)
  • 5U4GB tube rectified power supply
  • dual parallel outputs
  • DC used for 6SN7 filaments for low noise
  • 4 sets of gold-plated stereo inputs

A complete redesign of the Transcend MM Phono stage using premium components for more dynamic attack, increased detail and even lower noise floor.

  • 1 Set of Stereo MM Phono inputs
  • 1 set of stereo line level outputs
  • true analog design
  • 100% point to point wired
  • (2) 12AX7's for RIAA correction and gain

Taking the venerable 6SN7 Line-Stage to the next level- this preamplifier has many upgrades which combine to create a truly remarkable soundstage! This unit will compete with any preamplifier- at any price point.

  • 20 Db of gain fully user adjustable
  • 4 sets of stereo line level inputs
  • 3 sets of stereo line outs (note: the XLRs are quasi-balanced not full differential).
  • All gold plated RCA jacks and 100% copper wiring used throughout
  • BENT AUDIO remote volume controller (price without BENT audio remote- $2850)

Taking my KT88/120 Amplifier to the next level- this amplifier has many upgrades which combine to create a truly remarkable soundstage! This unit will compete with any single-ended amplifier- at any price point.

  • Single-ended design with switchable "Triode/UL" modes
  • Hybrid Tube/solid state rectifier system provides the stability of diodes with the smoothness of a tube rectifier
  • 6SL7 driver stage
  • EL34, KT88, KT120,KT150 compatibile with current switch ability to deliver more power from the KT120 and 150 tubes
  • Audyn True Copper coupling capacitors

The Motherlode is a military-spec ultra high end preamplifier utilizing a separate dual power supply for the lowest noise and best resolution.

  • (2) 6SL7 line stage
  • (2) 6SL7 MM phono stage
  • (2) OC3 tube regulators
  • TKD potentiometers
  • Clarity Film capacitor power supply

My vision of the most pure and transparent platform for the 300B single-ended amplifier. This amplifier delivers the wide midrange that the 300B is famous for, while keeping an extended airy high end and maintaining a solid, deep and extended low end.

  • 6SN7 input stage in SRPP mode
  • 6L6 driver stage in triode-strapped mode
  • 300B single ended output stage
  • Audyn True Copper foil coupling capacitors
  • Silver wire used in the signal path

The "Special Push Pull" is an enigma to the push-pull protocol of amplifier design, as this amplifier is built with the no holds barred philosophy that is typically only reserved for boutique SET amps. This design preserves the natural 2nd order harmonics which most PP amps cancel out- leaving the music "thin", "dry" or "solid-state sounding". This is truly an amplifier with bloom, proper color and meat on the bones midrange magic!

  • Full Octal input and phase splitter stages
  • Continuously variable/defeatable damping network (NFB) encompasses the entire amplifier circuit
  • Can be driven directly from a Line Level source, or a preamp
  • Film capacitor power supply
  • Audyn "True Copper capacitors (Duelund available upon request for an upcharge of $950

The 300B remains the purest, most natural sounding audio tube since its inception. The Alpha 300B employs a pair of 300B's per channel running in pure Class A push-pull mode. This is a powerful and musically dominant amplifier providing much of the single-ended sonic signature. It preserves the purity and realism of a SET, along with the speed and slam of a well executed push-pull.

  • Full octal input and phase splitter stages
  • Canadian transformers
  • German-made Audyn True-Copper coupling capacitors
  • Fully outboard power supply with dual tube rectifiers
  • Lifetime Film capacitors used throughout

The most involving 3.5 watts you've ever heard- period. A 2A3 DHT SET amplifier done right, featuring a 6SN7 input/driver stage, a 5U4GB rectifier and a well-smoothed choke-filtered power supply.

  • True DHT SET design
  • 3.5 watts RMS per channel
  • Cathode Auto-Bias circuit for the Power Triodes
  • Fully tube rectified power supply utilizing a 5U4GB (5AR4 can also be used)
  • Direct-coupled 6SN7 input stage fed into the driver stage

A massive SET amplifier using either the 211 or 845 transmitter triodes, producing 25/35 watts respectively with graceful overload characteristics well over 40 watts. This ampliifer has been built to celecrate the true expression of these tubes in a no compromise design!

  • Input tubes: 6SN7 in SRPP mode
  • Driver tubes: EL34 in Triode mode
  • Power tubes: 211 or 845 transmitter tubes
  • Voltage regulator tubes: OC3
  • Damper diode tube: 6CG3