Results 1 to 7 of 7
  1. #1
    AR Newbie Registered Member
    Join Date
    Jan 2016
    Posts
    4

    Talking Strange Audio Problem

    Hi,
    This is my first post, so if it's in the wrong place, don't hesitate to let me know. My 2 channel system is a McIntosh MA6300 running 2 Focal Chorus 720 loudspeakers. I listen to CD's, (Rotel) Vinyl (Linn)and stream music from the web via an Audio Engine Sender/Receiver.

    About 1 year ago I started to notice that every so often, (not every time I listen) one of the channels (the issue doesn't seem to favor left or right) would start cutting in and out, or producing static like noise. I checked banana plugs and connections on the back of the Mac and the Focals, tightened everything up, moved the wireless receiver away from the rest of the system,and things seemed to get better.
    But it wasn't fixed. The problem continued to happen off and on, but without any rhyme or reason. Then it would just go away.
    I took the MA6300 in for repair, and of course they ran the system for 4 days straight with no issue. Brought it home, and it ran without the issue for about 7-8 months. then last week it started again.
    I'm now thinking I'll start eliminating gear from the system so that I only run bare bones CD's and Vinyl. The problem is that if that doesn't help, the system could still run for months and then show up sometime down the road.
    If anyone has suggestions of any kind I'd appreciate it. My brain is fried with just trying to figure this out.
    Cheers,
    Cap

  2. #2
    Forum Regular blackraven's Avatar
    Join Date
    Nov 2006
    Location
    St. Paul, Minnesota
    Posts
    5,422
    Capndad, I would post that here-

    The Lab

    I think that you will get a lot of responses from a lot of qualified audio engineers.
    I hope this helps.


    Larry
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
    Magnepan QR1.6 speakers
    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
    Monitor Audio S1 speakers, PSB B6 speakers
    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
    Adcom GFR 700 AVR
    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

  3. #3
    AR Newbie Registered Member
    Join Date
    Jan 2016
    Posts
    4
    Quote Originally Posted by blackraven View Post
    Capndad, I would post that here-

    The Lab

    I think that you will get a lot of responses from a lot of qualified audio engineers.
    I hope this helps.


    Larry
    Thanks Larry. Very kind of you.

    Cap

  4. #4
    Forum Regular
    Join Date
    Mar 2002
    Location
    St. Louis, MO, USA
    Posts
    10,178
    does the problem happen on all your sources or just the Bluetooth receiver?

    intermittent issues are the worst.

    If it's from all sources it would almost have to be an amp issue. If Mac uses any microprocessing in the amp, like preamp section, it may be it's just needing an occasional reset which can be done by unplugging the amp for several seconds. This could be why it didn't do anything in the shop and worked for so long without the issue returning for you.
    Mark Levinson #512 SACD & 532h power
    Pass Labs XP-10 preamp
    Clearaudio Performance DC & Maestro v2 E, AcousTech Ph-1p
    Clarus Crimson loom - AC outlet to speaker terminal
    JBL 4367's & SAM3ha
    Revel S30's & SVS PC13 Ultra (sub)
    Marantz BD-7003 > AV-8003 > LINN 5125
    Transparent cables / Tributaries HDMI
    PS Audio Quintet & Surgex SA15&20

  5. #5
    AR Newbie Registered Member
    Join Date
    Jan 2016
    Posts
    4
    Thanks Mr Peabody. I believe the issue lies with the Balance pot since I was able to make the problem worse yesterday by turning the knob back and forth a few times. And because I don't want to apply more than one fix at a time, today I'll get a can of DeoxIT and work on the pot. We'll see how long that lasts, if it works.

    Thanks for the post,

    Cap

  6. #6
    AR Newbie Registered Member
    Join Date
    Jan 2016
    Posts
    4
    So I finally got a can of contact cleaner and took a shot at cleaning the balance pot today. But after listening for about an hour, the problem came back. I'm gonna take another crack at the cleaning since the pot doesn't look like I expected it to. (i.e. no holes in which to spray the cleaner.)

    Anyone know what kind of pot McIntosh used in the MA6300. If I knew that, I could find out how to clean it properly.

    Here's another clue. When I recycle the power (Turn it off and on) the problem is gone, and stays gone!!

    Thanks to all for the great replies.

    Cap

  7. #7
    Forum Regular blackraven's Avatar
    Join Date
    Nov 2006
    Location
    St. Paul, Minnesota
    Posts
    5,422
    Give McIntosh service a call and maybe they can help
    Pass Labs X250 amp, BAT Vk-51se Preamp,
    Thorens TD-145 TT, Bellari phono preamp, Nagaoka MP-200 Cartridge
    Magnepan QR1.6 speakers
    Luxman DA-06 DAC
    Van Alstine Ultra Plus Hybrid Tube DAC
    Dual Martin Logan Original Dynamo Subs
    Parasound A21 amp
    Vintage Luxman T-110 tuner
    Magnepan MMG's, Grant Fidelity DAC-11, Class D CDA254 amp
    Monitor Audio S1 speakers, PSB B6 speakers
    Vintage Technic's Integrated amp
    Music Hall 25.2 CDP
    Adcom GFR 700 AVR
    Cables- Cardas, Silnote, BJC
    Velodyne CHT 8 sub

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •