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VAC Signature 200iQ Stereo/Mono Power Amplifier

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Achieve perfect sonic purity with the VAC Signature 200iQ Stereo/Mono Power Amplifier. Boasting unmatched performance and power, this luxury amplifier produces up to 100 watts per channel in stereo and 200 watts monoblock with its exclusive patented VAC iQ Continuous Automatic Bias System that ensures each power tube is operating at its optimal level. Revel in a pristine sonic experience with the VAC Signature 200iQ.


“I love the balance between old school and modern. VAC has lavished these units with cost-no-object niceties... while eschewing new valve types in favor of venerable KT88s. The sound reflects this with detail and scale to match the best of solid-state, yet with luscious warmth to never let you forget it's a tube affair. Or a love affair...”
Ken Kesslerhi-fi news, April 2, 2021


Vacuum tube power amplifier with transformer coupled output


  • VAC iQ Continuous Automatic  Bias System ™
  • Class A1 triode input & driver stages
  • Direct coupled input & driver stages
  • Low feedback design (6 dB)
  • 12 volt trigger
  • Detachable power cord
  • IEC power receptacle

Switch Settings

Fully balanced or single-ended input
Stereo or mono operation

Power Output

100 watts/channel stereo continuous
200 watts mono continuous

Speaker Matching Taps

1-2 ohms, 2-4 ohms, 4-8 ohms

Frequency Response

4 Hz to 85 kHz, +0/-3 dB

Full Power Bandwidth

13 Hz to 70 kHz, +0/-3 dB

Residual Noise

Typically > 95 dB below-rated output

Input Impedance

  • 200k Ohms, Stereo, Balanced
  • 100k Ohms, Stereo, Single Ended
  • 100k Ohms, mono, Balanced
  • 50k Ohms, mono, Single Ended


  • 30 dB, Stereo, Balanced
  • 33 dB, Stereo, Single Ended
  • 31 dB, Mono, Balanced
  • 34 dB, Mono, Single Ended

Output Polarity

Balanced input is Pin 2 positive.

Tube Complement

  • 4 x type 6SN7
  • 4 x type KT88
  • Compatible with KT120
  • Electrically compatible with KT150 (may be too tall to fit under the cage)

Operating Voltages

Available factory set for 100, 120, 220, or 230/240-volt operation


  • Cardas rhodium RCA jacks
  • Neutrik XLR jacks
  • Cardas rhodium binding posts


  • 18" W x 17.25" D x 8.75" H
  • 457 mm x 438 mm x 222 mm
  • Excluding knobs & connectors


100 lbs. 
45.5 kg