Preamp for my MC30 pair, a Sensi needed.

Discussion in 'McIntosh Audio' started by zenarrrow, Apr 18, 2018.

  1. TSmith8605

    TSmith8605 Senile Member Subscriber

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    Dynaco equipment was designed to provide decent, credible sound quality at the lowest possible price. As such, the build quality and cosmetic are sacrificed as are features. McIntosh is designed with the opposite approach of providing best sound, best build quality, most features and so a much higher price.

    The gain controls on the MC30s are a nice-to-have feature. That the ST 70 does not have this feature is one of the ways they kept the price lower. A competent tech could easily install gain controls in an ST 70 if you want the feature added.

    Don't overthink the clear-path thing. The gain control is just a variable resistor and is not going to add appreciable noise or distortion to the signal. In fact, the signal path in the MC30 uses four small tubes per channel verses just one small tube per channel in the ST70 and so is a much more complex signal path and yet the MC30 clearly delivers much better sound and lower noise.
     
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  2. zenarrrow

    zenarrrow AK Subscriber Subscriber

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    Thank you. From now on I am all ears, an empty page to soak up knowledge. You guys all have years and years on what I know. So I may ask silly questions, but remember I do appreciate it very much all the answers and patient you all have showed me.
     
  3. zenarrrow

    zenarrrow AK Subscriber Subscriber

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    Well at many attempt at types of tweaks. Fiddling with the tone controls. Placing felt in front of the horns etc, speaker placement etc.
    I have come to the conclusion, that for one I don't like having to adjust the tone controls at the beginning of every listening session.

    Don't know if it's the MC30s or the MC30s with the Altec Lansing model 14 horns.

    When I hook my ST-70 back in with the MX110Z everything is precisely accurate.

    So, a conclusion , MC30'S with the Pas 2 Bright. MC30'S with the MX110Z bright. Pas 2 with ST-70 I notice what I never noticed before a lot of back ground white noise(?).

    But with the mx110z MC30'S and my Altecs, a pretty darn good combo.

    Maybe the 30's bring out more of the brightness in the Altecs.

    One thing I am unable to try is different speakers in the mix. Except a pair of Altec 890 Bolero's. Which don't do my system justice on any level.

    Maybe I should save my money and send the 30's into someone who can address my issue with an open mind, with my concerns with my current gear.

    Any suggestions with speakers for a mx110z MC30 setup? As this the only option I haven't tried to adjust.

    Thanks Joe
     
  4. mnmmt

    mnmmt AK Subscriber Subscriber

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    Speakers would be my guess as to where the issue lies. Horns make my ears ache. I use modern tannoy dual concentric speakers and love them (they are a quasi horn with the wave guide tweeter, but make my ears happy). Any Tannoy will work well with McIntosh.
     
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  5. zenarrrow

    zenarrrow AK Subscriber Subscriber

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    Yeah, just weird that the ST-70 doesn't reflect this issue, maybe because the MC30's are so much more detail...?
    As I have stated at times the combo is super musical, almost unreal in how they sound. Just been narrowing down the possible culprits. This will be my new goal
    - as the first response - has to be of interest to you.

    I would hate to send them (mc30's) off and have them come back the same. And they might just well come back just the same. Thank you very much.
     
  6. zenarrrow

    zenarrrow AK Subscriber Subscriber

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    Are you speaking of these roughly?
    https://www.ebay.com/itm/TANNOY-Rev...558414&hash=item1ca022c33d:g:nxYAAOSwHLNZWsuu

    Some of the Vintage ones seem to be pretty expensive.
     

     

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  7. mnmmt

    mnmmt AK Subscriber Subscriber

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    I have the saturn s8, which is a prior version of the xt8f, which get excellent reviews. The problem may not be with the mc30s, but with the st70. If it hasnt been restored, it may just be dull sounding. I have a bunch of old receivers i have restored, and a lot of them sounded wooly and rolled off on the top end before restoration. It may just be that old caps in the st70 counteract the bright tweeters?
     
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  8. zenarrrow

    zenarrrow AK Subscriber Subscriber

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    I will have to take a gander at my ST-70. I bought it restored a few years back. So I do not believe it is out of spec.
     

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