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THD BiValve 30 Head
THD BiValve 30 Head
THD BiValve 30 Head
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THD BiValve 30 Head

Marsoni M251S
Sale price$499.50
Pay 4 payments of $124.88 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
THD BiValve 30 HeadThe BiValve 30 is a Single Ended Class A amplifier head that allows for versatile tonal experimentation by switching between various octal based power tubes, such as 6L6, EL 34, and KT 66, without the need for re biasing. You can mix and match any combination of output and preamp tubes (12AX7, 12AT7, etc.) to achieve different sounds. This amp delivers a range of tones from smooth and clear to aggressive overdrive, with a powerful output transformer
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  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1952 reviews
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L
Verified Purchase
Lance Low
Phoenix, US
★★★★★ 5
It works!
Fitment was great on my 2014 Subaru Crosstrek. Construction was solid and great that I don’t have to worry about changing it for 18,000 miles. Would purchase again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2026
T
Verified Purchase
Thomas M. Cook
Port Orchard, US
★★★★★ 5
As described, great quality
Perfect fit and function for 2018 Subaru Outback
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
M
Verified Purchase
Michael Mueller
Belleville, US
★★★★★ 4
Good product
This is a long life filter without having to oil and wash like a lifetime k&n.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025
C
Verified Purchase
Create58
Lowell, US
★★★★★ 5
Fits great
Excellent value for the money and fits great. Does exactly what you need it to.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 17, 2026
C
Verified Purchase
Carlos J. Caballero
Battle Creek, US
★★★★★ 5
buen articulo funciona perfecto.
buen articulo funciona perfecto.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 14, 2026

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