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HK Receiver Center Channel shuts down

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Uncle Albert

After over a year of flawless performance of my HK AVR525 receiver, the unit can't handle loud transients in DVD movies... the center channel gets knocked out
Any similiar experiences? I may have to shiop for a new, more robust (more power and reliability) unit soon. Suggestions are welcome.
Uncle Albert

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It'd make things alot easier.... - grantv 11:30:34 10/26/04 (9)
If you listed your system. Speakers especially in this case.
- Re: It'd make things alot easier.... - Uncle Albert 06:52:55 10/30/04 (8)
  Center - M&K MX700 (8 ohm)
  Fronts - Avance Elipson 680's (4 ohm)
  Rears - B&W 300 series (8 ohm)
  - Are you sure? The MX700 according to the M&K site is a subwoofer, not a center channel. NT - grantv 08:48:04 10/30/04 (7)
    - Oops ..... - Uncle Albert 17:06:01 10/30/04 (6)
      It's actually the S125C
      - That said.... - grantv 22:34:04 10/30/04 (5)
        
        In Reply to: Oops ..... posted by Uncle Albert on October 30, 2004 at 17:06:01:
        
        The S125C is rated at 4 ohms according to the M&K website. If your receiver is rated only to 8 ohms (which as far as I can find on the HK website, it is) then this is probably your problem. You could do any of a number of things:
        -Get a more robust receiver
        -Get a separate mono amp if the receiver has preouts (I didn't check while I was there)
        -Get a center rated at 8 ohms
        -Zero formers may work also (no affiliation nor do I really know much about them, but they may be your cheapest fix)
        
        Zero formers (Open in New Window)
        
        Re: That said.... - Uncle Albert 06:54:02 10/31/04 (4)
        
        In Reply to: That said.... posted by grantv on October 30, 2004 at 22:34:04:
        
        I did try a seperate tube mono amp, without success.
        UA
        
        You mean that..... - grantv 12:01:20 11/01/04 (3)
        
        In Reply to: Re: That said.... posted by Uncle Albert on October 31, 2004 at 06:54:02:
        
        Even when using a separate power amp using pre-outs the center channel goes out on loud transients? Maybe the center has a "breaker" of sorts???? Either that or your receiver is having some sort of problem as it shouldn't "see" the 4 ohm load using a separate power amp from the pre-outs. It does have pre-outs, right?
        
        Does the center have some sort of "breaker"??? NT - grantv 13:14:06 11/02/04 (1)
        
        In Reply to: You mean that..... posted by grantv on November 01, 2004 at 12:01:20:
        
        Re: Does the center have some sort of "breaker"??? NT - Uncle Albert 16:21:58 11/03/04 (0)
        
        In Reply to: Does the center have some sort of "breaker"??? NT posted by grantv on November 02, 2004 at 13:14:06:
        
        No
        
        Re: You mean that..... - Uncle Albert 12:45:19 11/02/04 (0)
        
        In Reply to: You mean that..... posted by grantv on November 01, 2004 at 12:01:20:
        
        Yes
We're so sorry... - Ironwoods 10:40:02 10/26/04 (4)
Hey, did you check your connections?
Does the HK indicate a circuit fault or clipping?
Are you using the optical or digital coax?
Does the speaker sound ok, at the times it does play?
Whos make is the center?
Have you tried switching the center with one of your mains?
You shouldn't have to buy a reciever every year or so, unless this is some ploy to upgrade %)
- Re: We're so sorry... - Uncle Albert 06:54:13 10/30/04 (3)
  Hey, did you check your connections? YES
  Does the HK indicate a circuit fault or clipping? NO
  Are you using the optical or digital coax? OPTICAL
  Does the speaker sound ok, at the times it does play? YES
  Whos make is the center? M&K
  Have you tried switching the center with one of your mains? YES
  You shouldn't have to buy a reciever every year or so, unless this is some ploy to upgrade %)
  - A little sketchy - Ironwoods 06:36:05 10/31/04 (2)
    So the problem exsists with one of the Avance Elipson 680's (4 ohm)at the center position?
    If the mains are not shutting down with the normal configuration, I'd think the impedence is not the issue here, as they are also rated @ 4 ohms.
    A cheap test with a coax replacing the optical could reveal a problem with the optical connection. Have you tried this?
    Does the H/K have a discrete center channel volume control? If so, where is this set?
    Which input terminals are you using on the center?
    What guage is the center channel speaker wire and how far of a run is it?
    - Re: A little sketchy - Uncle Albert 06:53:05 10/31/04 (1)
      So the problem exsists with one of the Avance Elipson 680's (4 ohm)at the center position? NO, Epsilons never shut down
      If the mains are not shutting down with the normal configuration, I'd think the impedence is not the issue here, as they are also rated @ 4 ohms. I agree
      A cheap test with a coax replacing the optical could reveal a problem with the optical connection. Have you tried this? No, are you suggesting that the optical cable or circuitry for that optical connection may be at fault?
      Does the H/K have a discrete center channel volume control? NO If so, where is this set?
      Which input terminals are you using on the center? The "regular" center channel outs (using the HK's amp) .. I've also used a seperate tube amp to power the ctr channel with no success
      What guage is the center channel speaker wire and how far of a run is it? Don't know exact guage but it's Monster XP� Clear Jacket - Compact Speaker Cable - about 3 foot run.
      - More ?'s - Ironwoods 09:53:52 11/08/04 (0)
        
        In Reply to: Re: A little sketchy posted by Uncle Albert on October 31, 2004 at 06:53:05:
        
        Sorry I missed your reply to my questions until today, as I had seen your newer post reguarding a new reciever.
        Yes, I think you should at least try the digital coax swap. I've heard of strange instances were some fideling has revealed a problem.
        I had also seen on the M&K www. that your center channel has a choice of 2 *inputs* ; regular and maximum output. Which configuration are you using?
        It is however, sounding like that center is the rat in the kitchen. Especially since the problem doesn't happen with one of the Avance Elipson 680's at the center position. Have you tried the M&K in the L or R *main* postions?
And you didn't change anything? NT - grantv 09:27:38 10/25/04 (3)
- NT - Uncle Albert 17:49:46 10/25/04 (2)
  Nope
  - How many ohms is the center and what is the amp rated to? - grantv 18:34:01 10/25/04 (1)
    Maybe you did some damage over a period of time to the amp section.
    - Re: How many ohms is the center and what is the amp rated to? - Uncle Albert 06:55:09 10/30/04 (0)
      Center is rated 8 ohms ... amp is 8 ohms as well

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