Custom Dual Quad 84 // Tube Integrated Amplifier

SOLD , now part of a Private Collection

One of a kind custom-built dual-mono EL84 amp was designed and built by Gordon W, who is a major contributor to the content of audiokarma.org. Check out the documentation below for Gordon's description of the design, original photos of this amp, and schematics. Tests well and sounds great. Very nice design.

Condition
9/10
Serial No.
NA-GWDQ-01
Restoration
  • Full 30-point service check
  • Tested all tubes
  • Set Bias
  • Cleaned controls, switches, and chassis
Factory Specs

Type   Dual-mono tube amplifier

Power Output   25 WPC (as tested)

Frequency response   20Hz to 20kHz

Total Harmonic Distortion   .05% (as tested)

Output Impedance   8Ω

Tube Complement   8x EL84, 4x 5814 (12AU7 compatible)

Dimensions   17"W x 8"D x 6"H

Weight   25 lbs.

Documentation

Custom Dual Quad 84 Owner's Manual

Custom Dual Quad 84 Schematic

Stock No.
8083127271645

One of a kind custom-built dual-mono EL84 amp was designed and built by Gordon W, who is a major contributor to the content of audiokarma.org. Check out the documentation below for Gordon's description of the design, original photos of this amp, and schematics. Tests well and sounds great. Very nice design.



Condition

9/10

Serial No.

NA-GWDQ-01

Restoration

  • Full 30-point service check
  • Tested all tubes
  • Set Bias
  • Cleaned controls, switches, and chassis

Factory Specs

Type   Dual-mono tube amplifier

Power Output   25 WPC (as tested)

Frequency response   20Hz to 20kHz

Total Harmonic Distortion   .05% (as tested)

Output Impedance   8Ω

Tube Complement   8x EL84, 4x 5814 (12AU7 compatible)

Dimensions   17"W x 8"D x 6"H

Weight   25 lbs.

Documentation

Custom Dual Quad 84 Owner's Manual

Custom Dual Quad 84 Schematic

Stock No.

8083127271645

Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier
Custom Dual Quad 84 // Tube Integrated Amplifier

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