Designed and Made in England. 

Built to order.

The photos are of a previous commission. 

There are films of the new S.V.A Reverberation Unit Type A415 on youtube. There are customer videos up there too including one from the legendary Prince Fatty. Search SVA A415.

This version includes the HPF and LPF filters from that solid state UK console company.


S.V.A's version of the classic Grampian 636. This is not a clone. 

1. Each unit is hand built to order with extreme care and love.

2. Germanium Transistors are carefully selected to meet the original operating points of the Grampian circuit.

3. No cheap foreign labour is used and no one is exploited and paid minimum wage.

4. Only high quality capacitors are used in the signal path. 0.6w resistors used through out.

5. This is not an off the shelf product.

6. I have personally installed a rather large solar array and lead acid battery storage capacity  ( 99% recyclable unlike lithium )  and power all of my work with the Sun and the Sun only.

7. I was the first employee at Origin Effects U.K.

Transformer Coupled Germanium Transistor preamp ( preamp  circuit taken precisely from the Grampian 636 ) coupled to a classic driver circuit that drives the tank in a  strong compressed fashion.

Neutrik Connectors.

 L.E.S bulb compressed transistor driven Reverb tank driver.One of the warmest fuzziest transformer coupled mic amps and the most delicious spring reverb. Direct switch added so the A415  can  be used on an AUX bus too. 

  • The A415 uses 7W of power. The A415 are now entirely built and engraved near Oxford using only solar power.

Turnaround 21 working days

Reviews mainly from my ebay feedback page. Those have listing numbers after the feedback comments . Some are DMs . 

"....Yeah have just tried it at the studio - it’s awesome man, absolutely love it. Sounds exactly the same as the one I had tried previously from SOUNDGAS only £4K cheaper. I put it on a desk aux as you said going into the mic input but it seemed to work best with the direct switch flipped up.  That gave me the really nice distortion I remembered from when I’d used one before. Really happy with it - not sure you necessarily want more customers but if you do, let me know and I’ll spread the word a bit amongst other producers I know ....." MG, Ibibio Sound Machine 2021

Michael's A415 spring reverb is exceptionally good. I have tried a bunch of springs over the past 15 years and have never heard one like this. The filters are smooth and their frequency rangers are ideal for cutting out some of the inevitable boomy low end or making the reverb a bit darker. The distortion adds beautiful character to any source. On top of that Michael was very communicative and kept me up-to-date on the building and shipping process. I highly recommend ordering from him. Thanks!
S.V.A. A415 Dub Spring Reverb Grampian 636 Neve Blue / Grey with filters (#186297088830)

Wow what can I say. The a415 unit sounds amazing, blew me away the second I plugged it in. Michael has been a great help and great contact start to finish. Will be buying more from him for sure. Thanks again Michael mate
S.V.A. A415 Dub Spring Reverb Grampian 636 Neve Blue / Grey (#185886264973)

Michael, this thing you’ve made is a real thing of beauty. I’ve had it hooked up for a day and a half and already used it flute, vocals, drum machine and mono synth. It’s absolutely magic! The spring reverb is WAAAY better than I expected it to be . ( Duncan at Map Studios , North London )

Really good service and contact, super pleased with the reverb, sounds proper! CHEERS!!
S.V.A. A415 Dub Spring Reverb Grampian 636 Neve Blue / Grey (#185831103974)

The reverb is great ! Champion reverb🏆 Love the overload L.E.S. Bulb, such a warm light 😆👍!🎚️🎛️ Thanks Michael this one sound perfect for my work. I have other Spring but this one at low level should sound natural , good surprise for me. Happy with it 👍🙉 S.V.A. A415 Dub Spring Reverb Grampian 636 Neve Blue / Grey (#185826960476)

Wow! What a great sound this unit’s got. Everything sounds sweet through it, organic - an instrument in it’s own right. The Direct Switch is very useful & with the two added filters that this Prince Fatty version has, you’ve got plenty of scope to get the kinda sound you want… Big-up Michael

The S.V.A. A415 is fantastic, I love it! This reverb can do no wrong, it sounds great on everything, perfect for any genre. The service is also great, Michael provided me with updates and was a pleasure to deal with. Thanks! Steven Romero, California  ( from my SVA Reverb account ) 

Top Seller!!! The S.V.A. Spring Reverb A415 sounds awesome, deep and ruff reverb sounds with that nice touch of distortion, Many thanks! Top Quality built, great contact, recommended AAA+++S.V.A. Spring Reverb A415 Neve Blue / Grey Grampian 636 Dub Rasta (#185205580325)

I've owned many a spring reverb from the Fisher SpacExpander to Benidub Spring Amp and although they are good. This is the king! Beautifully crafted, very well built and sounds absolutely superb. Over the moon with it. Superb communication and an absolute gent!S.V.A. Reverberation Unit Type A415 Neve Blue /Grey ( Grampian 636 ) Dub Spring (#185206336048)

Hey Michael just wanted to let you know how much I’ve been loving this ridiculous unit you’ve made. I’m currently mixing an album for a pretty successful artist called Joesef, it’s become the vocal sound of the whole record. It’s insane and I love it. Thanks x Absolutely incredibleS.V.A. Reverberation Unit Type A415 X 2 in Grey / Blue for Lee (#185361642449)

I bought this reverb solely based on the few videos on Youtube and I have to say it is quite an impressive character piece. The old school spring reverb sounds beautiful but what makes this reverb unique is the way you can drive the preamp to either give character to the reverb or just use the preamp to add a gritty and characterful overdrive / distortion. The reverb will be a great secret sauce to to add to various sources.S.V.A. Spring Reverb A415 ( Neve R.A.F. Blue / Grey X 2 for Ola ) (#185137315026)

I just have to let you know - I am super happy with the reverbs and that I got two. Have been playing around with them in a mix I am doing snd the sound fantastic. Great job!S.V.A. Spring Reverb A415 ( Neve R.A.F. Blue / Grey X 2 for Ola ) (#185137315026)

The A415 reverberation unit looks and sounds great! Amazing vintage fuzz and reverb tones! Thanks again!!S.V.A. Spring Reverb A415 ( Grampian 636 , Neve R.A.F. Blue / Grey Rasta ) (#185115134523)

Fantastic high quality build and great spring sound. also looks great. overload lights up satisfyingly. wonderful value compared with other manufacturers. 5 starS.V.A. Reverberation Unit Type A415 ( Grampian 636 Neve R.A.F. Blue Grey ) (#185114295832)

OUTSTANIDNG !! 5*****S.V.A Reverberation Unit Type A415 ( Grampian 636 )A+++ superb seller… my A415 sounds utterly incredible, built and shipped to me in bespoke spec, super quickly, excellent communication and not to mention it just saved me a fortune too. Delighted! Thanks for everything:)S.V.A. Reverberation Unit Type A415 ( Grampian 636 Neve Blue Grey ) 

AMAZING version of the classic Grampian 636 spring reverb made famous by Lee Scratch Perry & Pete Townshend. Great communication, quick build, custom color, custom dual outputs. Absolutely adore this unit. Quick shipping to US. Highly recommend!

S.V.A Reverberation Unit Type A415 ( Grampian 636 Neve R.A.F Colour )My A415 is GREAT! I love it! Especially the tones derived from the mic input when driven, amazing!S.V.A Germanium and Transformer Coupled Classic Spring Reverb ( Grampian 636 ) 

Great reverb amazing quality ! excellent communication throughout arrived very well packed. I will defiantly buy from again A++++S.V.A Reverberation Unit Type A415 ( Grampian 636 R.A.F Neve / Blue Grey )

Great communication, packaging and a fantastic product - excellent! S.V.A Reverberation Unit Type A415 ( Grampian 636 ) 

Can't wait to play through it again! Grit and a gorgeous spring reverb in one. S.V.A Germanium Transistor Transformer Coupled Classic Spring Reverb (#184655687408)

AAA+++ Awesome seller…  the character of the pre in the A415, seems really on the money with the sound I expected, really, really lovely, I’m pleased… potentially saved me spending an awful lot of money too:)S.V.A. Reverberation Unit Type A415 ( Grampian 636 Neve Blue Grey )