MC2150 cosmetic quirks and questions

[Gregory]

Maybe you got an engineering prototype?

That's what Ryan told me in Oct 2012.


-Greg

 

[Gregory]

Found email:

From: Ryan Kilpatrick <ryan@audioclassics.com>
Date: Mon, 22 Oct 2012 10:42:02 -0400
To: xxxxxxx
X-Mailer: Apple Mail (2.1081)

The one we have is a prototype from McIntosh engineering. This is priced at double price because of this and is in our museum.


Ryan Kilpatrick
Audio Classics Ltd
3501 Old Vestal Rd
Vestal, NY 13850
phone & fax (607) 766-3501
​

-Greg

 

[damacman]

I installed 4 or 5 in smaller discos for the HF speakers, normally Klipsch Las Scalas, and used 2250's to drive the MWM. woofer used as subs. Sounded great and with two La Scalas on each channel 90 watts or so was a perfect match. In one disco system we used the 2155 to drive the monitor speakers while 18 2255's drove the fill and dance floor speakers and 4 2600 drove the sub woofers. I liked 2155's and 2150's. They were smooth and easy to listen, too. Power Guard protected the speakers and my ears. I tried them at home but preferred the 7200, because of its much higher damping factor because it didn't have autoformers. It really showed up the PSA2 and DC-300 A's I was using at the time.

I bet that place rocked!

 

[cnolanh]

That's a nice amp, been keeping an eye out for one of those. Did you buy it from Audio Classics? Yes, now I see the Eval sheet. The one they had was some kind of factory proto or Eng model. Are the covers missing from the back of heat sinks? That's what AC sent me photos of, a 2150 with missing back covers.

Please post a photo of the back side.
-Greg

Yes, I bought mine from AC in 2017. It does have the heat sink covers on the back. It’s not the engineering prototype that you posted photos of. But like that one, mine has no serial number showing on the back.

And yes, it’s a fine amplifier!

 

[Gregory]

I installed 4 or 5 in smaller discos for the HF speakers, normally Klipsch Las Scalas, and used 2250's to drive the MWM. woofer used as subs. Sounded great and with two La Scalas on each channel 90 watts or so was a perfect match. — I tried them at home but preferred the 7200, because of its much higher damping factor because it didn't have autoformers. It really showed up the PSA2 and DC-300 A's I was using at the time.

OT – First time I heard La Scalas back in the mid 70s, they were powered by a Crown DC300A. The price of La Scalas then was 595 ea. Next time looking at them in the 80's the price was 753 ea. Had a pair of Cornwalls for home demo in the late 80s. Didn't end up buying but made a frequency response chart in the living room.







-Greg

 

[green arrow]

I have recently acquired this amp, just found this thread.

Wondering if OP or any others have replaced the lamps, and is it an easy job? All four of my lights are out, but the digital system test still works

The MC2150 is so heavy, I don't think I want to take it in for service unless there's something more serious required.

 

[lbcgav]

I have recently acquired this amp, just found this thread.

Wondering if OP or any others have replaced the lamps, and is it an easy job? All four of my lights are out, but the digital system test still works

The MC2150 is so heavy, I don't think I want to take it in for service unless there's something more serious required.

I know you posted this a while ago, but I just wanted to say that it's not a difficult job. Just be careful not to use too much heat when removing the solder as the traces can be easily lifted with too much heat.