Foundation v3 & SN Tube Linestages

The Foundation v4 and SN utilize different tube compliments both designed around the same topology.

NOTE: The Capacitor Selector option found on the Foundation v3 is no longer an available feature.

The Foundation v4 and SN are single ended tube preamplifiers designed around the 6922 and 6SN7 dual triodes (footnote 1). The design goal of the Foundation preamplifiers was to provide an audiophile quality at an affordable price.

Remaining chassis has two large vent holes on the top of the chassis with pure copper mesh for ventilation. 

The Foundation line preamplifiers are designed to complement most power amplifiers available including tube or solid state design.

The power supply is of usual Response Audio quality. A high quality toroidal transformer feeds a solid state CLC (choke filtered) design utilizing polypropylene filter capacitors. Tube filaments are powered by a separate regulated DC supply.

The circuit is designed  in such a way as to have a maximum tube life for the tubes.

The v4 and SN both have more than enough output for any power amplifier, transistor or valve, and is ideal for driving long interconnect cables to remotely located power amplifiers due to its low output impedance.

Standard Chassis is black anodized aluminum 16" x 16" x 5.5" with laser engraved aluminum front panel.

All Foundation products are housed in an all aluminum chassis with aluminum front backing plate with a laser engraved acrylic front panel. The chassis itself uses extensive bracing to help eliminate any resonance from the chassis to get into the signal. We have decided to not pursue expensive, custom CNC'ed aluminum chassis for the Foundation Series to keep our pricing reasonable. Do you want to spend an extra couple of thousands of dollars for a fancy chassis only to get the same performance? 

See pricing below.

• Aluminum chassis with laser engraved acrylic front panels
• Neutrik RCA connectors
• Remote volume control w/Mute
• Tape Monitor Loo
• Enhanced ground scheme
•  Solid state choke filtered power supply employing a high current toroidal transformer with a separate transformer used to drive the remote volume control and input selector

• Warranty: 2 years parts and labor. 90 days on tubes.

TAPE - Allows the use of an EQ, Processor, Tape unit, and of course our Harmonia v3 DHT tube stage. Please view our Harmonia Application video