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Marshall Amp Full Revalve Kits / Marshall VBA 400 Harma STR Ruby 6550A Full Upgrade Kit
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All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.
All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.
Marshall amplifiers are voice of Rock and Roll past, present and in future.These amplifiers have been used by all the music legends.
From Clapton's fierce bluesbreaker solos with John Mayall, to the powerhouse slam of Jimmy Page in Led Zeppelin to Steve Jones awesome sound with his JCM800.
These Kits are designed and put together to enable you to get the best out of your particular amplifier.
Our Classic kits are aimed at giving you the closest to the original Mullard/Marshall sound that has rocked the music world
LAST SETSpecial Offer 10% Discount
The Marshall VBA 400 Harma STR Ruby 6550A full upgrade kit is designed to give you the classic Marshall bass sounds reminiscent of the vintage late 60's early 70's Marshall super bass and Marshall Major amps.
The Harma ECC83 STR is a very well balanced with nice even bass response which has plenty of depth. The mid-range is very transparent which when changing pickup selection or using different basses gives a nice tonal variation that was lost in some other valves.
The Harma ECC82 STR follows the frame grid style of plate construction which makes it super low in microphonics. The sound is extremely well balanced and transparent. This valve also has less midrange emphasis allowing you to dial in the amount of fatness that you want. It supplies a clear and deep bass response with a fast attack which makes it ideal for those percussive styles of playing
The Ruby 6550A STR is a remake of the classic General Electric 6550A and the Ruby 6550A STR has many upgraded features to replicate the classic General Electric 6550A that was used many original vintage bass amp such as the Ampeg SVT
The valve is manufactured with a stronger anode material with welded plates with copper support rods. Heavy grade straight glass envelope, classic triple solid getter design and metal base ring. The other nice upgrade is thick mica top supports which prevents valve rattle.
Soundwise the Ruby 6550A STR produces an extremely balanced sound with an accurate musical reproduction of all the frequencies. It is very vibrant and has a lively sound with an incredibly clear bass response. It also has plenty of distortion free performance with a very smooth treble response so is a great choice in these super bass amps.
We vigorously test and dual matched and this set is a specially selected set of 8 off 6550A identically matched for use in the Marshall VBA 400 bass amps.
The set consists of 12 valves
3 Specially selected Harma ECC83 STR
1 Specially selected Harma ECC82 STR in V3
8 Selected and matched 6550A Ruby 6550A STR in a matched Octet.
Please note that this kit is for the valves only
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