If I’ve repaired or upgraded your amplifier, or you’ve purchased parts or equipment from me, I’d be grateful if you could take a moment to leave some feedback.
Your comments not only help a small independent specialist service, but also provide future customers with confidence when deciding who to trust with their equipment. Genuine experiences shared by previous customers are often the strongest foundation for that trust.
Thank you for taking the time to share your feedback.
(The feedback input form can be found at the bottom of this page.)


Stoyan is great in communicating via email without delay. He gave great advice as to what options I had and has a wealth of detailed knowledge in what he’s repairing – telling you in a way that’s easy to understand. Job completed within a few days. Excellent throughout. Thank you.
*Kef C4 – no power and blowing onboard fuse*
Sorry for the late reply. I was so glad to find someone that can repair my Kef sub as Kef stopped support and repairs for my model. Stoyan was a pleasure to deal with up front with costs and great advice. A big thank you for repairing my sub, any one thinking of using Stoyan do so he’s great.
I had a problem with my Rel quake subwoofer and Stoyan name came up on the search engine, I had it all checked out and upgraded with some new parts sounds great again!
I will have my power amplifier checked and updated next!
Excellent service
Incredible service, fast turn around time and professional communication. Would not recommend anyone else for the job. Thank you so much Stoyan.
Absolutely first class service. Detailed and prompt communication, excellent turnaround on my repair and very reasonably priced. Full marks and thank you Stoyan. HIGHLY RECOMMENDED!
Absolutely 1st class repair service – fantastic communication throughout, with details provided on repair options, advice, and suitable courier services, all in a timely and professional manner. This repair to my Subwoofer (no power) has brought it back to life and the amplifier board was replaced with an updated version.
I was impressed by the attention to detail and care of my unit, which makes this service standout in a niche electronics area where I was initially wary of trusting someone with my expensive equipment, but Stoyan has more than exceeded my expectations – Highly recommended and many thanks for your help!
I used Stoyans repair service several years ago and I didn’t leave a review straight away as I wanted to confirm the repairs would last. 5 years later and my kef subwoofer amp is still running without fault. I took all the pre-emptive repairs that were recommended and I’m delighted with the reliability of the unit.
Thank You.
Great service. Great instruction as to possible fixes with range of solutions for my subwoofer. Great after sales advice on set-up and care for product. KEF Sub now all fixed and working back in my cinema system. Stoyan would be my first go to for any other electronics issues I come across.
extremely good service, fast and professional, great communication, my REL subwoofer amplifier get second life. highly recommended. thank you very much Stoyan