My first McIntosh

Discussion in 'McIntosh Audio' started by zappafan2, Sep 3, 2017.

  1. kevzep

    kevzep Its all about the Music

    Im sure that will be pretty straight forward, completely losing audio on one channel can only mean one thing, intermittent connection. Its not terminal and I'd say not expensive to sort out.
    The meter is telling you the amplifier is actually still functioning, which is a good thing...
     
  2. 62caddy

    62caddy Trust but verify Subscriber

    Messages:
    7,825
    Location:
    NEPA
    Definitely not normal function. These amplifiers should make no sound when powering on or off and certainly should not be making noises after powered up. Sounds like a power supply issue possibility. Frankly I wouldn't continue to run the unit if exhibiting these symptoms. Get it checked ASAP is my advice.
     
  3. zappafan2

    zappafan2 AK Subscriber Subscriber

    Messages:
    479
    Location:
    Central Illinois
    Its not making any noise after powered up just right when I power it on I see the drivers in both speakers pulsate, no noise at all when powering down. Seems that when I first turned it on I heard a small thump in speakers a couple of times, its mainly a pulsating on my speakers drivers. Thanks for the help I am going to post another thread about the 2105 and get some more feedback, the owner of the shop assured me that according to his tech it is not an issue I want to believe him but I just don't know. I still have time to return this for a full refund and I want to make sure I do the right thing.
     
  4. damacman

    damacman Blown and Injected Subscriber

    Messages:
    6,530
    Location:
    Gilbert, AZ
    One of my MC2300s began doing this immediately after I had it serviced at Marvin's in Fort Worth. I took it back and they were unable to offer an explanation, but did assure me that the amp met all published specs. I put it back in service and forgot about it. That was 20 years ago ... No issues whatsoever and that amp has been in daily use since. I have also had an MC2105 do the same thing.

    I suggest that you give the dealer the chance to check the amp out. If they give it the green light, it's likely not an issue worth worrying about.
     
  5. woofmytweets

    woofmytweets AK Subscriber Subscriber

    Messages:
    1,489
    Location:
    Toronto, Canada
    i was told by my tech, that with some of these units, new caps exceed the specs of the older ones, and there can be some settle time when they break in. i know mine had a bit of a break-in period when i had it serviced (an MC 2205) and now seems very solid. for completeness, it made a snapping noise through my speakers once when i turned it off, but has been perfect since.

    the channels cutting out, however, i would say is not normal. could be issues with the speaker cables, perhaps a speaker relay - i'm not really an expert, but the sound cutting would seem to be something you'll need to get remedied
     
  6. SaturationPt

    SaturationPt AK Subscriber Subscriber

    Messages:
    591
    Location:
    N.E. Indiana
    Check the speaker switch for your channel cutting out, might be dirty.

    Regarding the speaker "pulsation": If you turn your preamp on first, then the amplifier, does it still do this? Same with turning off - if you turn the amp off with the preamp still on any noise / pulsation? If the answer is yes to either of these then I do not feel that it is normal.
     
  7. welcomdmat

    welcomdmat AK Subscriber Subscriber

    Messages:
    487
    Location:
    Pittsboro, NC
    For simplicity when turning your system on, I have my amp plugged into a Switched plug on my preamp. When I turn on my preamp, it turns on my amp.

    I do not have a choice because there is no on/off switch for my amplifier. It is still a nice way to sequence the powering up of your system as amplifiers prefer to be turned on last and off first.
     
  8. 62caddy

    62caddy Trust but verify Subscriber

    Messages:
    7,825
    Location:
    NEPA
    Yes - Panamax 1000 or 1500 power controller does precisely that. Need to find a used one on ebay Audiogon etc.
     
  9. zappafan2

    zappafan2 AK Subscriber Subscriber

    Messages:
    479
    Location:
    Central Illinois
    Started making a buzzing noise to go along with the pulsation it is now unhooked and ready to go back for a refund, getting the refund and calling Audio Classics. Thanks for all the help guys appreciate it.
     
  10. techguy0192

    techguy0192 AK Subscriber Subscriber

    Messages:
    445
    While that's a good suggestion, the MAX 1000 and 1500 now have a good bit of age on them. Personally, I'd look at more recent models. I think the APC AV G5 would be a good alternative and can be found online starting around $150.
     
  11. 62caddy

    62caddy Trust but verify Subscriber

    Messages:
    7,825
    Location:
    NEPA
    Yes but the Panamax units are triggered by a switched A/C outlet such as on the back panel of a preamplifier as the OP was looking to do; I'm not certain whether the APC device has this facility.

    I have a MAX1000 in each of my systems that I purchased used on eBay. They're both working very well. One did need a new capacitor in the PS board.
     
  12. slowpat

    slowpat AK Subscriber Subscriber

    Messages:
    3,684
    Location:
    SF Bay Area, CA
    Sorry to hear that you're returning the 2105. Audio Classics has a good reputation among AKers...might as well check out Terry and Tom's store - mcintoshaudio.com.

    As for the pre-amps, the C29 is more difficult to find as they don't come up for sale that often, and the C32 may experience the ribbon cables issues sooner or later. The other suggestions will all work. I think if you're willing to try any of the suggested preamps, the more opportunity you will have, rather than fixating on a single model.
     
  13. Tcomisky

    Tcomisky AK Subscriber Subscriber

    Messages:
    3,135
    Location:
    Lawrenceville, NJ
    What speakers are they? They look like Ascend Acoustics Seirra 1's?

    I made a pair of those based on that design, out of Bamboo. Great sounding speaker!
     
  14. zappafan2

    zappafan2 AK Subscriber Subscriber

    Messages:
    479
    Location:
    Central Illinois
    They are Sierra 1's a great speaker
     
  15. Searing75

    Searing75 Active Member

    Messages:
    228
    Location:
    Olean, NY
    What?! No C32? Those ribbon cables are not the problem folks make them out to be! Sure, if you go into one and pull the ribbon cables out of their sockets, then they may crumble a bit, but they are easily replaced. The preamp has a beautiful sound, and very usable features.
     
  16. Tcomisky

    Tcomisky AK Subscriber Subscriber

    Messages:
    3,135
    Location:
    Lawrenceville, NJ
    Yes they are. I made a pair of towers based on that design. My friend upgraded his with the new RAAL tweeter, driver and crossover and gave me the left over parts. I made these cabinets out of bamboo flooring that was on sale at Lowes. A lot of glue, bonds and black lacquer and here they are.
    Really great sounding speaker for the driver size!


    IMG_0769.JPG

    Pre paint:

    DSC04324.JPG
     
  17. zappafan2

    zappafan2 AK Subscriber Subscriber

    Messages:
    479
    Location:
    Central Illinois
    Wow very nice, you did a great job!! My Fiance' is still amazed at the sound these put out, if you could have seen her expression on first seeing them "Oh I did not know this is the direction you were going":D:D:D After a few of our favorite lps she was hooked
     
    Tcomisky likes this.
  18. kevzep

    kevzep Its all about the Music

    That is not the reason I didn't list the C32. I owned a C32 for some time, then I went to a C40, which brought me closer to the sound I was after, and then eventually to the C48 which I love.
    Later I got myself a C33 to pair with my MC2205 in the second system, it very much reminds me of the C40.
    The 29/30 are from the same mold as the others I mentioned. I just didn't care for the 32, it not a bad pre-amp though.
     
  19. zappafan2

    zappafan2 AK Subscriber Subscriber

    Messages:
    479
    Location:
    Central Illinois
    Talked to Tom Manley today real nice guy, wants me to look real hard at the 2205 he is really high on it. That is also looking at my budget which is around 2k, in his opinion I would forget all about the 2105 after hearing the 2205.
     
  20. musichal

    musichal poet emeritus Subscriber

    Messages:
    7,954
    Location:
    Norman OK
    Just in the last few days, I've been thinking about Mc, too. I have owned Mc, but only for reselling, and they sold fast. That 2105 looks great in your room, zap. The compact MA-5200 integrated seems to be calling my name of late. I've been saving up, and am very close to affording a new one, but would prefer a lightly used price. Anybody heard one? Or have any opinion about its quality? It would fit into my cabinet, while Mc separates would not. And it would be for the Khorns, so a classic match. I don't intend to hijack zap's thread, but figured I wouldn't get very many replies if I started my own, and with other Mc components already under discussion here figured I wasn't straying too far OT anyway.
     
    Last edited: Sep 15, 2017

Share This Page