Stewart 1.2 - Will it overheat?

Discussion in 'Amps and Cabs [BG]' started by emjazz, Jun 30, 2003.

  1. emjazz

    emjazz Supporting Member

    Feb 23, 2003
    Boston, MA
    Has anyone had problems with the Stewart 1.2 overheating?
  2. coyoteboy

    coyoteboy easy there, Ned Supporting Member

    Mar 29, 2000
    Sactomato, CA
    Once, a long time ago, outside, in the sun, loud playing. no fan. I've played other, similar gigs and had no problem. It's been a real workhorse for me, and I've relied on it.
  3. jokerjkny


    Jan 19, 2002
    NY / NJ / PA
    like i said in another thread,

    i did a few low volume gigs that haphazardly became "high volume" gigs, and the Stew rocked on just as well. and it was inside my 2 rack SKB case. granted this happened before NYC's sudden heatwave, but still, the stew was rockin'.

    at a hot sunshine gig, good air flow from something like a clip on fan to a larger box fan that can better cool both you and the amp should blow enough cool air over the massive heatsink fins, to keep the Stew AOK.
  4. Jerry J

    Jerry J Supporting Member

    Mar 27, 2000
    P-town, OR
    For what it is worth, I don't have actual personal experience with the Stewart amps. But the guys at Bass Northwest love the Stewarts but really only recommend the 1.6 or the 2.1. That could be a sales ploy but they really aren't that way. Chad and the Aaron are really on the up and up.

    On the other hand, I sure would never question Joker's or Coyoteboy's experience.
  5. bben


    Feb 28, 2002
    Santa Fe, NM
    I haven't had any problems with mine, but I only drive a pair of 1x12s with it, and I have lots of air space around the heatsink fins.
  6. basss

    basss Supporting Member

    Aug 27, 2001
    I have mine in a 2 space rack with a preamp. I usually run it bridged into 8 ohms. I have done loud gigs with no fan and have never had a problem.
  7. Carl Brusky

    Carl Brusky

    Sep 21, 2000
    Let me tell you about my experinece.

    I have a SWR Gran Prix preamp feeding a power amp. This power amp feeds either a Bergantino 310 which is 4 ohms or a 112 ontop of a 115 whic totals 4 ohms.

    I had a Stewart 1.2 mounted in a rack with a space below it and a external fan blowing air across the bottom. You will notice the bottom is the area tha gets real hot. I also had a space above the amp. So much for staying with a small rack, right?

    Well one night I was playing through the Bergie 310 and we were half way through the 1st set when my Stewart power amp went into thermal protect mode. I was pissed. The next week the amp came out and a QSC PLX 1202 went in instead. NO PROBLEMS SINCE.

    MY ADVICE. If runnig bridged and less than 8 ohms forget it. It will not take it. At least mine didn't.
  8. davelowell


    Jan 18, 2001
    stl, mo
    i did so many searches before ending up with a qsc plx 1602. i would like another ten or so pounds off of my rack weight, but i also want something with a fan. i got the qsc and love it, never looked back at the stewart repair table, even once.

    your mileage may vary

  9. emjazz

    emjazz Supporting Member

    Feb 23, 2003
    Boston, MA
    Thanks for all your responses so far. I am curious about the 1.2 because I was thinking about switching out my iAMP800 for the Stewart and a RavenLabs pre with the two channels. I am eventually going to get a Woods but untill I can afford that I want something else with two channels that is light. I may just stick with the iAMP and get the small RavenLabs PMB-II to go in front of it. I really like not having a fan for an amplifier. It makes recording in a studio much easier.
  10. TheCreature


    May 22, 2002
    Dallas, TX
    I'm running my 1.2 in a two space rack w/a preamp. Bridged into four ohms, playing fairly loud, the 1.2 regularly goes into thermal shutdown during the first set. I used to carry a clip on fan - what a PIA, so I had an amp tech mount a small 120V fan to the back of the amp inside the rack, and that works OK. Played out at the lake last weekend, 95 deg F, in the Texas sun and it held up fine. Still got hot as hell though.
  11. coyoteboy

    coyoteboy easy there, Ned Supporting Member

    Mar 29, 2000
    Sactomato, CA
    The differing experiences might be accounted by inconsistancies in build quality over the years. For the longest time I ran at 2 ohms a side into four Acme Low b-2's, and I was pumping those speaks, and nary a clip light was a showin'. Granted, mine is a grey PA-1000, though I doubt there is a significant difference.