@Magfan
So what turned out to be the problem?
So what turned out to be the problem?
Pass 250.5 shuts down driving Magnepan 3.7
This is my first post so please bear with me.
My Pass labs 250.5 protection circuit shuts the amp down when I drive my new Magnepan 3.7s at high volume. I'm talking about a volme higher than I might consistently listen, but not an unbearable level.
I'm using a Cary Slp 05 preamp with long balanced ICs (25 ft,) The amp is close to the speakers with less than 6 feet of speaker wire. The system works fine at normal volumes. I've tried the same thing with a pair of Cary MB500 (750 W @ 4 ohm) and they too shut down at high volume.
I believe the maggies drop below 4 ohms and I wonder if either amp can handle the impedance drop below 4 ohms.
Has anyone experienced this issue ?
Any suggestions ?
My Pass labs 250.5 protection circuit shuts the amp down when I drive my new Magnepan 3.7s at high volume. I'm talking about a volme higher than I might consistently listen, but not an unbearable level.
I'm using a Cary Slp 05 preamp with long balanced ICs (25 ft,) The amp is close to the speakers with less than 6 feet of speaker wire. The system works fine at normal volumes. I've tried the same thing with a pair of Cary MB500 (750 W @ 4 ohm) and they too shut down at high volume.
I believe the maggies drop below 4 ohms and I wonder if either amp can handle the impedance drop below 4 ohms.
Has anyone experienced this issue ?
Any suggestions ?
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- 35 posts total
The OPs answer on the planar asylum: I can't figure out what he did except hook it back up after litle success with Cary amps.....? I finally went back and hooked up my Pass Labs 250.5 and I've had nothing but great music since. The fact that my pass amp overheated was apparently not related to the Cary amps shutdown. The Cary amps are new because just purchased off of Agon. I wanted mono blocks to place behind the speakers, But after listening to both amps there's no way I could go back to the Cary's. The pass amp just sounds so much better in every way. This is not to discredit the Cary but to my ears there's no comparison. Not to mention that the Cary's don't appear to be a good match for the Magnepan load. I should have known Now these go back on Audiogon and someone will get a great deal. I now would like to see if I could get a another 250.5 and use one 250.5 to drive each channel. Not sure that would work with these amps but I guess that's for another post. Thanks for all the suggestions and help |
I'm not sure what the problem was with the OP's set up. Again, my Cary's are having no issues with my 3.7R's. They handle Mahler(front row loud)without complaint. There is not an inherent incompatibility between the Cary's and the Maggies. Something else was not right. As for the OP's preference for the sound of the Pass 250.5, well, there is a reason Pass amps have such a great reputation. I wouldn't mind having a chance to A/B the Pass and Cary's myself. |
"The OPs answer on the planar asylum: I can't figure out what he did except hook it back up after litle success with Cary amps.....?" RE:ISSUE RESOLVED |
- 35 posts total