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  #11  
Old 05-29-2016, 07:17 PM
McInosh McInosh is offline
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And no need to bias with each tube swap?
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  #12  
Old 05-29-2016, 07:23 PM
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And no need to bias with each tube swap?

Worry about bias adjustment once you figure out and replace the problematic tube(s).
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  #13  
Old 05-29-2016, 07:49 PM
McInosh McInosh is offline
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Been thinking of new tubes anyway. You confident it's a tube issue? If so, I'm just gonna replace them all.
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  #14  
Old 05-29-2016, 07:54 PM
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Been thinking of new tubes anyway. You confident it's a tube issue? If so, I'm just gonna replace them all.
I'm not sure at all actually. But a tube likely and it costs you nothing to swap left for right to diagnose the issue.
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  #15  
Old 05-29-2016, 08:17 PM
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Been thinking of new tubes anyway. You confident it's a tube issue? If so, I'm just gonna replace them all.
McInosh.......Figure out if it is a tube issue before you begin buying tubes. Take the time and swap all of the left channel tubes to the right channel and the right channel tubes to the left channel. If the problem travels with the tubes, you now know the amp doesn't need service, just new tubes. If your tubes have extended hours on them, buy all new power tubes. I can highly recommend Gold Lion KT88's. Don't overlook your four 12AX7 tubes and the two 12AT7 tubes. Try swapping them between channels as well. If it is time to replace the small tubes, again Gold Lion gold pin 12AX7 and 12AT7 tubes are excellent and reasonably priced.
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STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario
LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113
VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A
Last edited by jdandy; 05-29-2016 at 08:53 PM.
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  #16  
Old 05-30-2016, 11:48 AM
McInosh McInosh is offline
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Gotta find a repair shop nearby.

Swapped every tube from right to left and the right channel still has a little less volume and no bass.

Thanks for your suggestions folks.
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  #17  
Old 05-30-2016, 12:17 PM
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McInosh.......Did you also swap the small tubes?
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STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario
LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113
VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A
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  #18  
Old 05-30-2016, 01:08 PM
McInosh McInosh is offline
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Yep, swapped every tube
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  #19  
Old 05-30-2016, 01:26 PM
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Yep, swapped every tube
Bummer. Sounds like it's the amp. One last thing, flip the balanced/RCA switch back and forth a few times while powered off. Then put it in the correct position and give it a listen.
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  #20  
Old 05-30-2016, 01:37 PM
McInosh McInosh is offline
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Thanks, I did that too, just to make sure they were firmly in the proper position
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