Blackstar Full Revalve Kits / Blackstar Artisan 15 Mazda EF86 Groove Tubes Super Pre EL84S Full Upgrade Kit

Blackstar Artisan 15 Mazda EF86 Groove Tubes Super Pre EL84S Full Upgrade Kit Blackstar Artisan 15 Mazda EF86 Groove Tubes Super Pre EL84S Full Upgrade Kit Click on image(s) above to view larger
£148.00
£130.50

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Black Star guitar amplifiers have quite rightly caused a major buzz in the music industry since their launch back in 2007. By upgrading the valves to our selected sets customers have been able to voice their amps to their personal requirements. Customers have reported a range of benefits when upgrading the valves over the factory items. Here we have listed our most common upgrades using current production and the best new old stock items to help you get the most out of these fine Black Star amplifiers.
Special Offer 10% Discount


Groove Super Premium S Series full upgrade kit is designed to give your amplifier the ideal balance of clean headroom and smooth warm overdrive using a specially selected set of Groove Tubes.

The Groove Tubes Super Premium ECC83S are the selected GT items and in addition to GTs in house testing are specially drive tested by us to ensure even gain and checked for low noise and microphoney.

ECC83S Groove Tube produces a warm even tone with a full rounded bass response. The valve has a medium gain, when compared to many other modern 12AX7 types. This makes it particularly useful to calm down gain channels of high gain amplifiers to keep overdrive and saturation under control. This nice rounded tone makes this a good choice for amplifiers where clarity and warmth are required.

Groove Tubes Super Premium EL84S valves are specially burst tested by us. We take selected GT items and in addition to GTs in house testing and distortion rating on output valves they also undergo our own unique real world burst testing. The burst testing process involves a series of varying timed electrical signal bursts. This runs the valves under the same stress conditions that they will meet in your amplifier. All out put valves are then dual matched by us on current and gain. This will ensure that you get the best selected GT valves available anywhere in the world.

The GT EL84S is Groove tubes most popular EL84 as it offers a warm clean vintage sound. The valve has a clear and even frequency response with a nice open treble response. The bass has a warm rounded sound which is tight and punchy.

The heart of the Blackstar sound is the classic EF86 channel and to get more gain from this Channel we use a Mazda EF86. The EF86 Mazda excels in guitar amplifier applications due to the design of the Russian Mazda EF86. It has lower output impedance; the result is 10 % more gain when compared to other modern and new old stock EF86s. The Mazda EF86 also has a real musical break up and has a tight focused distortion.

The Kit consists of 6 valves

1 Specially Selected Groove Tubes ECC83S
1 Specially Selected & Balanced Groove Tubes ECC83S
2 Groove Tube EL84S Super Premium in a matched Pair
1 Specially Selected Mazda EF86
1 Specially Selected Harma EZ81 Retro

Please note that this kit is for the valves only

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