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**Roberto** · 04-22-2018, 09:46 AM

I've found this link: https://elektrotanya.com/trace-ellio.../download.html
But there's not everything. Has someone ever substitued those power amp modules with something different?

Thanks!

**Jazz P Bass** · 04-22-2018, 05:02 PM

If you do not need the full 1000 watt output power, then why do you not simply run the one amplifier at 500 watts?

I would disconnect any power leads going to the dead module.

Edit: have you checked the fuses?

I had one of these a while back with a 'dead' module and the fault turned out to be the Speakon output connector, not the amp.

**J M Fahey** · 04-22-2018, 06:35 PM

Originally posted by Roberto View Post

I've bought a Trace Elliot AH1000-12 with one power amp module blown.
Is there someone that can share its schematic?

When was yours made?
Manufacturers keep famous bestselling names but change guts now and then; older ones had Class AB "analog" Lateral MosFet outputs, big heatsinks and heavy power transformers, modern ones use lightweight SMPS and Class D power amps, show your amp guts to be certain.
Front panel and general cosmetics may be the same.

I would like to repair it, otherwise to substitute it with two class D power amp modules, keeping the power supply as is. Due to the higher efficiency of class d amps, there will be two paths: keep the same output power and make the power supply's life easier, or increase a bit the possible output power. I'd go for the former, as 1000 W are absolutely more than what I'll never use.

No, just one path: same power with colder amp.
Power supply defines output power, the power amp is just the "faucet" which sends more or less of it to the speakers.

**Roberto** · 04-22-2018, 08:24 PM

Thanks for the feedback Jazz P Bass. I�m sure it�s dead because I bought from a guy who tried to fix it, and almost destroyed that module. I would prefer to find two class d substitutes for those modules instead of running just one module.

Have you ever done something similar?

Thanks in advance

**Roberto** · 04-22-2018, 08:27 PM

Thanks J M Fahey,

I have the one with the heavy big thoroidal and the two modules with class AB mosfets.

**J M Fahey** · 04-22-2018, 10:26 PM

Ok, how many MosFets per board?

They use the same circuit in all amps , not their own desigh but a Hitachi MosFet application example, straight from the datasheet, just with various supply voltages and more or less output transistors.

Largest I have ir AH500 , meaning 2 x 250W modules with 4 MosFets each; suspect yours is same but with 6 transistors per module.
At least similar Ashdown Mag 500 has the same circuit with one module and 6 transistors.
Nothing new under the Sun.

Check whether this roughly matches what you have.

personally I would repair the dead module, to the extent of cloning its PCB if original is destroyed, go figure.
It is a very simple and nrobust amplifier, eqasy to service in the future, and you already have all the hardware mounted in the proper place (specially heatsinks).

Worst case go the Class D route, but you will have to mechanically adapt them to fit "inside a suit made for somebody else" and consider them disposable if anything happens.

Or plain pull the dead Class AB module and just use the working 500W one , as suggested above.

**Roberto** · 04-23-2018, 04:33 PM

Hi Juan Manuel,

I'll be out for the entire week, I will give you the right answers (and maybe a photo) this weekend.
I remember six or eight MosFets, but I want to give you a correct answer not to waste your time.

Clone the PCB would a bit over my capabilities, also because alot of components on the power amp are smd.
I will give you better answers in a few days.