Vox Cryo Full Revalve Kits / Vox AC15 Custom Classic Series 2004-2009 EL84 Retro Cryo Full Upgrade Kit

Vox AC15 Custom Classic Series 2004-2009 EL84 Retro Cryo Full Upgrade Kit Vox AC15 Custom Classic Series 2004-2009 EL84 Retro Cryo Full Upgrade Kit Click on image(s) above to view larger

All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.

Our Vox Cryo full upgrade kits are designed to get the best sound out of your Vox. Our Classic Retro Cryo kits have been by far our most popular as many owners have found that the Cryo treated valves have helped them find their sonic signature and improved the sound of their amplifiers. By upgrading the valves to selected Cryo valves they have noticed the additional benefits such as better clarity, larger and improved sound stage with increased reliability. Here we have listed our most common upgrades to the Vox range.
15% Discount

Until now midrange warmth, musical complexity and rich harmonic content was only attainable by using rare and expensive new old stock classics made by the English Mullard factory. This changed when we launched the Harma Retro Cryo range.

Now the sought after warm fat sustaining overdriven sound and the lush shimmering warmth of original British made vintage Mullards is attainable as the Classic Retro Cryo full upgrade kit is designed to give you as close as possible to the most sought after sound in Rock Music.

The Cryo process on the Harma Retro provide a harmonically rich and detailed 3D midrange that produces a huge a warm sustaining tone when pushed. The outstanding feature of this valve is it has a smooth linear midrange response The Cryo process adds more focus, better clarity and crisp musical distortion with better imaging in clean or in overdriven modes. This results in that warm a fat guitar tome that we all love.

The Harma EL84 Retro is designed to provide a smoother and warmer output with more mid-range emphasis. The Cryo process tightens up the bass giving the bottom end more definition and depth. The process also enhances the valves mid forwardness, just like the original, giving a full sustaining tone when overdriven to that aggressive biting tone when saturated. Power chords are tighter and have more weight and slam. The resulting single note solos easily cut through the mix. In short, a proven way of obtaining NOS sound quality at affordable price!

The Harma Retro Cryo provides the classic sound with all the warmth and clarity you need for a huge range of musical styles. If that is not enough, The Harma Retro Cryo valves have also attained a 5 star review in Guitar Buyer magazine therefore making these the ideal upgrade.

The kit consists of 4 valves

1 Specially Selected Harma ECC83 Retro Cryo
1 Specially Selected & Balanced Harma ECC83 Retro Cryo
2 Specially Selected Harma EL84 Retro Cryo in a matched pair

Please note that this kit is for the valves only



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