Cherry Amp Repairs?

rhale64l7 · « **Reply #60 on:** 25 Dec 2022, 09:55 pm »

Well folks I love to diy. I wanted to send out a feeler, And this goes along with people not finding parts. So I am thinking of putting up my 60 volt Cherry amp supplies. I have 4. I will take 300$ each or 550$ for two. So if you blew one up like I did I would have spares. I would sell all 4 for 1,000$

FL Guy · « **Reply #61 on:** 25 Dec 2022, 10:52 pm »

I'll take one. Sending you a PM.

sonicxtc · « **Reply #62 on:** 26 Dec 2022, 02:33 pm »

For anyone interested on a related note...
I have 3 Cherry amps that I will be listing in a day or so and a very good price.
They will include ALL the misc. parts, XLR/RCA converters, extra power supplies, etc.
I think there are 4 power supplies total.

If anyone is interested please PM and I'll reach out with early info.
One PAIR inline cherry Maraschino King In-line 60 Volt
One single amp Cherry King DTM with triple caps

I'll likely be selling these at a very good price, especially as a combo of all 3.

rhale64l7 · « **Reply #63 on:** 30 Jan 2023, 02:53 am »

If anyone else is interested in any of these power supplies I have 2 left I will sell for 250$ ea. They are the King 60 volt power supplies that are the original ones that came with the King Maraschino amps.

Ron

LarryD56 · « **Reply #64 on:** 7 Feb 2023, 01:21 am »

Looks like I am needing a set of FETs also. These would be for an STM Mk2. The part number on these FETs is BV8N11. I have a local tech that is willing to replace the blown parts, we just need to get our hands on the replacements.

Larry D.

FullRangeMan · « **Reply #65 on:** 7 Feb 2023, 01:43 am »

Try Mouser or Digi-Key.

LarryD56 · « **Reply #66 on:** 7 Feb 2023, 04:34 am »

Thanks FRM. Already tried those two. They are my regular go-to sources.

Barry_NJ · « **Reply #67 on:** 7 Feb 2023, 06:44 pm »

oops, sorry...

rhale64l7 · « **Reply #68 on:** 31 Jul 2023, 09:41 pm »

Folks I have two 60 volt power supplies from Micro Audio that are in custom boxes. All OCC copper Neotech and Vampire wire inside. Also have good IEC inlets and Neutrik DC cable outlet. I will take 250$ a piece. Both for 400$

rhale64l7 · « **Reply #69 on:** 31 Jul 2023, 09:43 pm »

If you want photos email me or message me on here and give me your email address.

BassMojo · « **Reply #70 on:** 30 Apr 2024, 05:03 pm »

Yesterday I discovered that one of my three MEGAschino mono blocks stopped outputting sound. Upon inspection, there is an internal red LED light inside indicating some sort of Ch2 fault. The other two monos have only the blue lights and function perfect. Has anyone else experienced this? Any ideas for possible repair if needed? I've reached out to Tommy's son for possible direction, but don't expect a response as he never responded to my prior messages upon Tommy's passing (RIP buddy).

LarryD56 · « **Reply #71 on:** 30 Apr 2024, 07:01 pm »

Just FYI:
I did get my STM King MK2 repaired after buying a matched quad of FETs from bobh123 and having the local tech in Twin Falls install them and test out the unit. Now, it sounds as great as it did before. I'm being more careful now with the amp's cables while it's running. It's been working well for over a year now, so as long as you have a good tech, these amps can be fixed.

Larry D.

BassMojo · « **Reply #72 on:** 30 Apr 2024, 07:09 pm »

Thanks Larry. I'm not sure the issue, but would like to explore a fix. There are no signs of damage and no bad/odd smell. I have used shielding on the binding posts since I bought them new from Tommy in late 2020 as I wasn't comfortable with the closeness of them. I am thinking that it is another issue and would be willing to ship it to someone competent for a prognosis. I'll PM you if you don't mind sharing the repair shop in Twin Falls.

arb70sok · « **Reply #73 on:** 3 Nov 2025, 10:40 pm »

I bought two Maraschino Kings in 2015 and have had no problems until last week when I may have shorted the speaker cables on one of them. I now have a problem with that power supply. It appears to be "dead". No blue light and no power to that channel (I still get sound out of the speaker but it sounds awful!) the other speaker is just fine. Having read the other posts on this thread, I suspect that I may have blown the 8 amp fuse on the power supply. I am based in London, UK. If anyone knows of someone in the UK who could help me diagnose and fix the problem, I would be very grateful. If that is not possible, any pointers and support to help me diagnose/fix the issue myself would be greatly received.

arb70sok · « **Reply #74 on:** 8 Nov 2025, 01:14 pm »

I managed to open up the power supply and check the fuse and sadly that wasn't the problem.

I wouldn't have a clue about how to proceed now with a repair so am hoping to find someone UK based who has the skills and knowledge to repair this power supply.
If I find someone who executes a good repair at a reasonable price, I will update here.

bobh123 · « **Reply #75 on:** 8 Nov 2025, 09:31 pm »

Hi: If you're getting some garbled sound out of the speaker, it's likely the power supply still has some/all of the voltage. When you short the speaker cable, the output FETs on the amplifier board normally short out on one side or both. Since the sound is garbled, one pair of FETs may be okay and the other pair shorted. A few years ago, I bought a bunch of FETs, matched them, used for my failed amp, and sold many to users that had failed FETs. I don't have access to my stash of matched FETs right now.

The AOB416 FETs were discontinued by the manufacturer but some supply houses may have some. I bought a reel of 100 from a decent supplier in China.

If you find the power supply is dead, you can likely replace it with one similar to the SMPS800RS. Audiophonics.fr has some listings. https://connexelectronic.com/product/smps800rs/ has various models.

Bob

I.Greyhound Fan · « **Reply #76 on:** 9 Nov 2025, 05:46 pm »

Digikey lists adequate replacement FET, scroll down to the bottom of the page

https://www.digikey.com/en/products/detail/alpha-omega-semiconductor-inc/AOB416/2353875#product-details-substitutes

arb70sok · « **Reply #77 on:** 10 Nov 2025, 07:36 pm »

Quote from: bobh123 on 8 Nov 2025, 09:31 pm

Hi: If you're getting some garbled sound out of the speaker, it's likely the power supply still has some/all of the voltage. When you short the speaker cable, the output FETs on the amplifier board normally short out on one side or both. Since the sound is garbled, one pair of FETs may be okay and the other pair shorted. A few years ago, I bought a bunch of FETs, matched them, used for my failed amp, and sold many to users that had failed FETs. I don't have access to my stash of matched FETs right now.

The AOB416 FETs were discontinued by the manufacturer but some supply houses may have some. I bought a reel of 100 from a decent supplier in China.

If you find the power supply is dead, you can likely replace it with one similar to the SMPS800RS. Audiophonics.fr has some listings. https://connexelectronic.com/product/smps800rs/ has various models.

Bob

Bob

Thanks a lot for this. The amp itself is fine as I have tested with the other power supply and all sounds good. It is just the power supply that is dead and I reckon that it is going to be difficult to diagnose and repair so replacing with the SMPS800RS sound like a great idea if that would work. How can I change your "likely" to "definately"? Perhaps that isn't possible. Also the audiophonics.fr has two products one rated at 48V and the other at 72V. I believe the original power supply was rated at 60V. Which power supply would be the more suitable for my application?

https://www.audiophonics.fr/en/search?search_query=SMPS800RS

arb70sok · « **Reply #78 on:** 14 Nov 2025, 12:02 am »

You might be bored with my power supply saga by now but having dismantled it and checked the underside of the board ...

I am now confident this is what I need

https://connexelectronic.com/product/smps800rs/

and I have duly orderd from connex.

Sadly https://www.audiophonics.fr/ didn't have the 230VAC, 60V option in stock.
They did have the RE version but a quick google established that would not be an appropriate replacement.

The price in USA + shipping was similar to that from France + shipping, so went for the exact supply and voltage from connex.

I also took a good look at exactly what I would need to do to fit the new supply into the original box from DAC and it looks straightforward (famous last words!).
I will let you know how I get on.

leehan76 · « **Reply #79 on:** 11 Dec 2025, 02:25 am »

Quote from: arb70sok on 14 Nov 2025, 12:02 am

You might be bored with my power supply saga by now but having dismantled it and checked the underside of the board ...

I am now confident this is what I need

https://connexelectronic.com/product/smps800rs/

and I have duly orderd from connex.

Sadly https://www.audiophonics.fr/ didn't have the 230VAC, 60V option in stock.
They did have the RE version but a quick google established that would not be an appropriate replacement.

The price in USA + shipping was similar to that from France + shipping, so went for the exact supply and voltage from connex.

I also took a good look at exactly what I would need to do to fit the new supply into the original box from DAC and it looks straightforward (famous last words!).
I will let you know how I get on.

Hi,

I’m curious how did this work out for you? I’m not sure if you had a similar issue with your Cherry amp. But my 5-CHerry won’t power on. I’m wondering if it’s just replacing a power supply on my amp as well. I took some pics of the inside of my amp to see if it may be something I can fix but the fuse looks ok, although two of the caps do look a little bulgy? Any suggestions welcome.

Regards,
John