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Ruby Tubes / 6550A STR-RUBY TUBES SINGLE
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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.
Ruby Tubes are a distributor brand the supplies valves from China, Russia and Slovakia. The factories send valves to the USA parent company Magic Parts who test and select them and distribute them to Music stores, Manufactures and engineers the World over under the Ruby Tubes label.
Ruby Tubes may be found in all brands of amplifier equipment, along with other valve powered products
Single ValveRuby Tubes may be found in all brands of amplifier equipment, along with other valve powered products
Great as a regulator in Audio Research amplifiers
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
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 a 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 for Hi Fi as well as Bass amplifiers.
Ruby state that their 6550A STR meets the specifications of the classic USA made 6550A and can be used in any 6550 application with excellent performance.
They state that the 6550STR Ruby has outstanding stability and reliability and certainly its construction is excellent.
All Ruby Power valves are tested by Magic Parts for quality assurance and selected for low microphonics and hum. The valves are dual matched on anode current and gain.
They are then retested and dual matched by Watford Valves on our custom test rigs in real working conditions. This ensures that you will get the highest quality Ruby Tubes power valves available.
These valve offer exceptional sound quality & great item to use as a regulator in Audio Research Amps
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