2005 THD – BiValve 30 – 2x KT66 – ID 6089

The THD BiValve-30 is the UniValve’s big brother and an exceptionally flexible single-ended Class A tube amplifier.
What makes it unique: The two power tubes can be replaced independently with numerous types of octal tubes (8-pin base)— without having to readjust the bias and even without the tubes needing to be matched.
This allows you to experiment with a wide variety of sound characteristics using combinations of 6L6, EL34, 6550, 6CA7, 6V6, 6K6, KT90, KT88, KT77, and KT66. The amp is currently equipped with 2x KT66 tubes.
A truly fascinating piece of THD technology for tube enthusiasts and those who love to experiment.
This item is in good condition and comes with a dust cover and an inspection report. The handle was installed separately.

✅ Year of construction: 2005
✅ Model: THD BiValve-30
Power: 30 watts
✅ Power amplifier: Single-ended Class A, 2x KT66
✅ Tubes: various octal types without bias adjustment
✅ Compatible with: 6L6, EL34, 6550, 6CA7, 6V6, 6K6, KT90, KT88, KT77, KT66
✅ Serial number: 0603
✅ Manufactured in the U.S.
✅ Weight: 15.5 kg
✅ Condition: Good
✅ Case: Dust-proof cover
✅ Documents: Inspection Report