Fender Full Revalve Kits / Fender Superbassman 300 Harma STR Ruby 6550A Full Upgrade Kit

Fender Superbassman 300 Harma STR Ruby 6550A Full Upgrade Kit Fender Superbassman 300 Harma STR Ruby 6550A Full Upgrade Kit Click on image(s) above to view larger
£356.00
£302.60

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Fender Amplifiers have a huge musical legacy that dates from the very beginning of modern popular music. Fender amplifies have a clean tonal character which is not matched by another manufacture in the world. Our Fender full revalve kits are put together after a life time of using and comparing the performance of valves in these amplifiers. The kits offer the best options drawn from original new old stock USA made valves and their modern counterparts. They are designed and put together to provide improved sonic and tonal definition with more clarity out of these legendary amplifiers. Each preamp kit is specially selected for low noise, uniform gain and tonal characteristic. All output valves have been burst tested and matched on anode current and gain.


Special Offer 15% Discount


The Fender Superbassman 300 Harma STR Ruby 6550A full upgrade kit is designed to give you the classic Fender sounds reminiscent of the vintage late 60's early 70's Black and silver face Fender 100 & 135 Bassman. It also gets the best out of the Ampeg Style channel two circuit

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 ECC81 STR uses the military designed half flange anode plate. This has 3 support rods which run through the anode plate this design was used by all the military as it reduces vibration and shock 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.

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.

The set consists of 10 valves

2 Specially selected Harma ECC83 STR
1 Specially balanced Harma ECC83 STR in V3
1 Specially selected Harma ECC81 STR
6 Selected and matched 6550A Ruby 6550A STR in a matched sextet.

Please note that this kit is for the valves only

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