AudiogoN Forums: Pass 250.5 shuts down driving Magnepan 3.7

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 ?

Gcoxsom (Threads | This Thread)

01-22-12

Responses (1-35 of 35)

Click title to read one, or click date to read all below it.

01-23-12 Suggestion: do not play your system that loud. otherwise, to ... Elizabeth

01-23-12 I had a problem at high volume using tube arc monos. i thin ... Chadeffect

01-23-12 I suspect there is a problem with the speakers. my cary 500 ... Brownsfan

01-23-12 I had a problem with the cary sp-05 driving my pass labs amp ... Ozzy

01-23-12 Suggestions: call or email pass labs about the problem. t ... Onemug

01-23-12 Are the amps in a well ventilated place? they very big and ... Magfan

01-23-12 I suspect if could be a defective speaker. i`ve heard good t ... Charles1dad

01-23-12 Given two amps same problem, i'd first check your power sour ... Bvdiman

01-23-12 I like that idea. if the wall voltage sags...badly, that'd ... Magfan

01-23-12 At high volume, my 4bsst would flash red driving the 3.6. th ... Jallen

01-23-12 You're not going to like this but perhaps the maggie's are j ... Ngjockey

01-30-12 Get a pair of krell or levinson amps. they can handle 2 ohms ... Ellyjr

01-30-12 That would be nice if the maggies dropped that low.... see ... Magfan

01-30-12 Your in a world of hurt. Ebm

01-30-12 Who's 'in a world of hurt'? Magfan

01-30-12 The guy with the problem.thanks Ebm

01-30-12 Over at the asylum, the op posed the same question. he has ... Magfan

01-30-12 Say what who really cares?? Ebm

01-31-12: Magfan
I'll be sure to be as unhelpful as possible if you ever have a problem, ebm.
Nice attitude.
Magfan (System | Threads | Answers | This Thread)

01-31-12 @magfan so what turned out to be the problem? Mordante

01-31-12 Sorry just joking.please have a nice day sorry!! Ebm

01-31-12 The ops answer on the planar asylum: i can't figure out wha ... Magfan

01-31-12 I'm not sure what the problem was with the op's set up. aga ... Brownsfan

01-31-12 "the ops answer on the planar asylum: i can't figure ou ... Hasse

02-04-12 Bought my first system in about 1987. magneplaner iic with a ... Ralvarad

02-27-12 Pass amps are great and i've heard that the xa100.5s will dr ... Podeschi

02-27-12 He had not installed the tweeter jumpers. no wonder the amp ... Hasse

02-27-12 And the stock tweeter jumpers are lousy. i replaced my jump ... Podeschi

02-27-12 Yes, i´m using the cardas tweeter and midrange jumpers on my ... Hasse

02-27-12 I tried the cardas jumpers (have a new set if anyone wants t ... Podeschi

02-28-12 I think the impedance of the maggies is too low to be safely ... Honeymonster

02-28-12 If you want to get loud, maggies may not be the best choice. Tmsorosk

02-28-12 "i think the impedance of the maggies is too low to be ... Hasse

02-28-12 "cardas smoothed/dampened the sound out a little too mu ... Hasse

02-29-12 I am very adverse to silver in your face etchy sound. the em ... Podeschi