They dont fix your mixer because you are not famous only rich people thats sad for them not for me thank you

Shipped a Matrix 1000 to this business for a check over and restoration. They had the unit for months (before COVID started). He requests email contact only. After several emails and phone call, and after months more of waiting, I finally got a call from them stating, the unit was complete and they were going to ship it back, no additional charge because of the time involved in the repair. They had the unit for over a year.I received the unit back in good physical condition but after powering it on,I noticed that patches 000-199 were blank. It appears that the battery may have been replaced without a patch back-up prior. I don’t know, because no post service paperwork was provided.My experience with this business was very frustrating and disappointing in every way. For these reasons, I could never recommend this business and will not be using them in the future.Your review response was a half truth. I paid a $100 deposit plus shipping cost to get it to you. So your service wasn’t free, Just half-baked. If you were unable to complete the job in a timely and thorough manor, you should have passed and returned the unit. Your job is not to question if it had been worked on in the past, your job is to fix what customers send you. You didn’t even bother to offer to send the missing patch SysEx files for me to load. In my opinion, you deserved the review that you got.

I have a Memorymoog synth which is one of the most complex synths ever to work on. I had previously sent it across the country to get it repaired by a company who are suppose to be the best. A year and a half later it was returned to me but unfortunately, within a month it was broken again.I found Rosen Sound locally and brought it over. It was returned to me in a fraction of the time and at a reasonable price. So far, Im super happy with the repair. Its like a new synth.People need to realize that this is a specialized business and you wont get your instrument back within a week. Relax, and just be thankful you found these guys.

Rob and team did an amazing job refurbishing my JP8, it sounds way better than it has in years, they found stuff that I didnt even know was broken and completely exceeded my expectations. Highly recommend!

Brought in my rev2 Prophet 5. I was very patient to get it repaired properly being it was frozen at startup. They found the very rare SSM chip and other issues were found and repaired. Even installed new firmware with added features!They know synths. Highly recommend.

Brought in a Jupiter 6 and very pleased with how it came back. Went in with a few keys not responsive and some controls behaving erratically. When I brought it in Rob tested the unit with me and explained to me aspects of the synth I wouldnt have even thought to have checked. 2 1/2 weeks later I got it back at a fair price. Highly recommended for old synths.

I couldnt help but notice something that the owner mentions on his website. He says that his business is the only one in town that works on large & difficult synthesizers. DONT BELIEVE THIS BOLD CLAIM! There are plenty of techs in the Los Angeles area that have been doing this for longer and who are way more experienced.He also mentions this - We have access to the most most fruitful sources of parts, meaning your synth has a very low chance of unsuccessful repair due to parts availability. DO NOT BELIEVE THIS EITHER! Almost anything can be fixed these days and from the right tech.It sounds like this guy is trying to make a name for himself by stretching the truth and by just flat out lying.This ISNT saying that he cant repair stuff or that he is a bad tech.Be cautious when considering techs like this. More and more these younger techs are popping up which dont have the experience the older, more seasoned techs have.

Excellent service, they fix my Yamaha DX7IID power supply (didnt turn on) and now it works like new. very affordable and professional. need a vintage synth repaired? they can do it.thanks! ROB.

Rob was very helpful and did a great job my Juno 106. Plan to go here for all of my synth repair needs.

I took my Maxikorg Univox synthesizer to Rosen Sound this past March 2015. After 21 days (he never reached out to me, I had to visit his studio twice to get word from him) they almost fixed the noisy oscillator (for $374), but not completely; so I made the mistake of taking it back for further repair. Almost two months later (now into June), Rob somehow made the synthesizer worse, it now has a constant droning D note. He would not even give a partial refund after sabotaging the synth . He wrote long emails about his righteousness and played up the role of the patronizing expert speaking to the lowly user.In lieu of using creative expletives, the bottom line is this: he does not own an analog synthesizer and should not be advertising as an expert in the field. I would look further, much further, if you have something rare and special.

Good rate, good service.