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Thread: Discuss-Crown PS-400/250ti combo

  1. #1
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    Discuss-Crown PS-400/250ti combo

    OK, in This Thread I bought a Crown PS-400.

    I added a APT Holman preamp and am happy with this set up, except it can be driven to clipping pretty easily into a set of 250ti.

    I see that the Crown is rated for 4 ohm service. I ran it hard for an hour into the 250ti and it wasn't even warm. I have a set of L220A that I have set to play nice with the 250ti, so I hooked them all up.

    Now I get some really nice sound levels, no clipping, and effortless jamming. I played almost 2 hours before I put any Steely Dan in

    Any trouble with extended 4 ohm operation (and I'm just guessing on the 4 ohm...whatever a set of 250ti and L220A a side has)?

    Sounds great, very minimal heat, no clipping lights, quite a bit more volume than just the 250ti. And I can always unplug the L220A if I want to just listen to the 250ti (this is an awesome combo with them alone).

    Now and then I see somebody list a "reference track" or something to gauge your system against. Look for a CD titled "Thunder" by S.M.V. and play track 3. That'll clear your sinuses, the snow off your roof, the cobwebs from your speakers. If things ain't tight, you'll know it right off.

  2. #2
    RIP 2010 scott fitlin's Avatar
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    At 4 ohms stereo, as long as the amp isn't getting too hot your fine.
    scottyj

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    How hot would you run it? I just looped the last couple of minutes of By-Tor and the Snow Dog about 20 times, right up to clipping on 4 ohms, and I can hold my hand on the heatsinks with absolutely no discomfort, maybe 115°

    I think the neighbors will intervene long before I melt the amp.

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    Senior Member BMWCCA's Avatar
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    Quote Originally Posted by JeffW View Post
    How hot would you run it? I just looped the last couple of minutes of By-Tor and the Snow Dog about 20 times, right up to clipping on 4 ohms
    How big is your room/house? I'd be knocking chunks of plaster out of the ceiling if I played anything loud enough to clip the PS-400.

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    RIP 2010 scott fitlin's Avatar
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    Quote Originally Posted by JeffW View Post
    How hot would you run it? I just looped the last couple of minutes of By-Tor and the Snow Dog about 20 times, right up to clipping on 4 ohms, and I can hold my hand on the heatsinks with absolutely no discomfort, maybe 115°

    I think the neighbors will intervene long before I melt the amp.
    We ran DC-300A,s for 16 hours straight, 4 ohms stereo operation.

    Your fine, the amp is in no danger.
    scottyj

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