Testing output on MC2255

[saltpeter]

 

[saltpeter]

They are located about an 8 hour drive south of SF, but George Meyer AV has a reputation for doing great work.

http://www.georgemeyer-av.com/mcintosh-products/

http://www.mcintoshlabs.com/us/Support/Pages/ServiceNetwork.aspx

I found that thread I mentioned.

http://audiokarma.org/forums/index.php?threads/mcintosh-repair-restore-in-sf-bay-area.370265/

Thanks!

 

[nj pheonix]

Thanks, I am planning to connect the speakers for load, and then measure the 8 ohm terminals.

We don't use speakers as load , the reason is simple . When we check a powerfull amp we don't disturb our neighbour !
Use 8 ohm loads , it is much better for your speakers !

Probably not so great for your ears either

 

[saltpeter]

Probably not so great for your ears either

I assume anyone trying the test would use a lowish volume setting...maybe not, WAHEY !

 

[nj pheonix]

Usually when people test amp output , they usually test until the onset of clipping. That amp may not clip for a while.

 

[62caddy]

That amp may not clip for a while.

Or at all...thanks to PG.

Probably have to be contented with power readings at 1% THD as there is no PG defeat switch on the MC2255.

 

[nj pheonix]

Good point
Hadn't thought about that

 

[blhagstrom]

Recently got an MC-2250.
One channel out.
Bad LDR.
Research indicated that is a common problem with the MC-2250 and MC-2255.

I managed to track replacements down and get mine going.

It’s something you may want to keep in mind.
The LDR sits in the input line to the amp so it directly effects the whole amp.