PA Amps For Sale - Page 2

imix500 · 4th January 2007, 03:11 AM

A Urei 6250 studio amp. Excellent build quality. Rubicon caps, Sanken 2SA1170/2SC2774, huge transformer, big heatsinks. A rare amp. $250

imix500 · 4th January 2007, 03:15 AM

...

imix500 · 10th January 2007, 01:06 AM

So, to hopefully spark a few buyers I am testing all the amps one by one. Testing will involve reforming the filter caps and looking at a square wave. Other tests can be performed on request.

First Up is DC150 #4. Filter caps reformed great and both channels pass a clean square wave.

imix500 · 17th January 2007, 11:36 PM

Ok, all the Crown amps have been checked. Most of the filter caps reformed well but they should still be replaced soon.

Some of the IOC leds are not working. A quick look showed it is probably a bad connection somewhere, but who knows. At least one is working on each amp.

The only amp that showed any questionable behavior was #3. There is about -1v of offset at idle into a 6ohm load. It amplified a sqaure wave well and up to spec, IOC kicked in at about 66 watts. I did not try to adjust the offest.

I am testing the Ramsa and Urei amp now.

Thanks!

imix500 · 23rd January 2007, 02:54 AM

Ok, both the Ramsa and Urei amps have been tested.
Caps reformed great in both amps.
The Ramsa did 271W and 279W into 3.9ohms with a +4dBu unbalanced input. The amp had more power to deliver for sure, but +4 is as hard as I can drive it.

The Urei did 378W and 370W into 3.9ohms. This was just before any distortion could be seen on the scope. The clip led on channel one didn't illuminate. However it lit with channel two when it clipped. Weird.

I'll give it another week until fleabay.
Thanks!

imix500 · 16th March 2007, 03:29 AM

One more time before they go.

dannyr · 8th May 2007, 03:28 AM

I am looking for the crown pre-amp that goes with this series. It's the crown psl-2. If anybody has one, please let me know. Thanks.

Danny

imix500 · 9th May 2007, 03:52 AM

Details and pics to follow-

Mackie FR-M1400i

AB Precedent 400

EV 7600

imix500 · 29th May 2007, 03:06 AM

A very nice, well built amp. Makes the second best sqare wave on the scope of all the amps I have for sale.
All original inside.

Power quoted is just before clipping into ~8.5ohms:

Ch A- 197.87W
3mV offset

Ch B- 206.40W
8mV offset
Bridged- 501.76W

$150

imix500 · 29th May 2007, 03:08 AM

Back and top...

10th January 2007, 01:06 AM	#13
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	Update So, to hopefully spark a few buyers I am testing all the amps one by one. Testing will involve reforming the filter caps and looking at a square wave. Other tests can be performed on request. First Up is DC150 #4. Filter caps reformed great and both channels pass a clean square wave.

17th January 2007, 11:36 PM	#14
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	Update Ok, all the Crown amps have been checked. Most of the filter caps reformed well but they should still be replaced soon. Some of the IOC leds are not working. A quick look showed it is probably a bad connection somewhere, but who knows. At least one is working on each amp. The only amp that showed any questionable behavior was #3. There is about -1v of offset at idle into a 6ohm load. It amplified a sqaure wave well and up to spec, IOC kicked in at about 66 watts. I did not try to adjust the offest. I am testing the Ramsa and Urei amp now. Thanks!

8th May 2007, 03:28 AM	#17
dannyr diyAudio Member Join Date: May 2007	crown amps. I am looking for the crown pre-amp that goes with this series. It's the crown psl-2. If anybody has one, please let me know. Thanks. Danny

9th May 2007, 03:52 AM	#18
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	A few more... Details and pics to follow- Mackie FR-M1400i AB Precedent 400 EV 7600

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23rd January 2007, 02:54 AM	#15
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	Ok, both the Ramsa and Urei amps have been tested. Caps reformed great in both amps. The Ramsa did 271W and 279W into 3.9ohms with a +4dBu unbalanced input. The amp had more power to deliver for sure, but +4 is as hard as I can drive it. The Urei did 378W and 370W into 3.9ohms. This was just before any distortion could be seen on the scope. The clip led on channel one didn't illuminate. However it lit with channel two when it clipped. Weird. I'll give it another week until fleabay. Thanks!

16th March 2007, 03:29 AM	#16
imix500 Proud Union Member diyAudio Member Join Date: Mar 2004 Location: Nashville, TN	One more time before they go.

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