Foundation Tube Linestage with Digital Output

The 6922 based Foundation is a tube preamplifier designed around the 6922 dual triode. The design goal of the Foundation preamplifier was to provide an audiophile quality Bluetooth streaming preamplifier at an affordable price.

Line-level preamplifier. Three line inputs plus one built in Bluetooth input, two line outputs and one SPDIF (digital) output from wi-fi streaming board. The Bluetooth server can be run internally from its analog output (input BT) or, using its digital output, can be connected to an outboard DAC of your choosing before routing back into one of the Foundation's inputs.

The Foundation line preamplifier is 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. 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 6922 tubes.

The preamplifier has 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.

Wood front panels available. See pricing below.

• Aluminum chassis with CNC engraved hardwood/acrylic front panels
• Neutrik RCA connectors
• Alps remote volume control w/Mute
• Tape Monitor Loop
• Mono/Stereo switch
• Audyn Plus coupling capacitors
• One Bluetooth 5.0 internal input with digital output.
•  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

• Tube Complement: (2) 6922 driver tubes
• Three sets of RCA inputs
• One Bluetooth 5.0 internal input with digital output 
• Two sets RCA main outputs 
• Gain: 10dB
• Input Impedance: 100Kohms.
• Output Impedance: 
• Frequency Response: 
• Dimensions: 16Wx16Dx5.5H w/footers
• Weight: 
• Direct Selling Price with Digital Bluetooth Board w/digital output
• Single Ended: $2,700 Bronze Acrylic
• Direct Selling Price without Digital Bluetooth Board
• Single Ended: 2,500 Bronze Acrylic
• Warranty: 2 years parts and labor. 90 days on tubes.