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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


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    ST-120 with Magnapan MMGs

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    Rbertalotto


    Posts : 98
    Join date : 2021-02-25

    ST-120 with Magnapan MMGs Empty ST-120 with Magnapan MMGs

    Post by Rbertalotto Thu Mar 11, 2021 3:56 pm

    VTA ST-120 up and running with main speakers.....After letting it run for a few hours on my bench with Parts Express C-Note speakers it was time to bring it upstairs and connect it to the Magnapan MMGs. I'm using a Schitt Saga preamp with a Bluesound Node2i streamer running through a Schiit Modi+ DAC. A B&W Subwoofer is connected to the second preamp outputs on the Saga. First observation, it takes the amp about 20-30 minutes to really sound sweet from start up. The tubes need to be at top operating temperatures I imagine. BASS..compared to the Yamaha M45, the bass from the ST-120 is about 300% better! Much tighter, rounder....I can turn the subwoofer down from 12 oclock to 9 oclock...Amazing difference! All other SQ is similar to the Yamaha in class A mode. But the Yamaha in class A is only about 10 watts. (120w in A/B mode) The Maggies need more than that.....so the St-120 wins this battle easily. Otherwise I'm amazed at how quiet the ST-120 is....ear on speakers quiet! More listening is required. The Yamaha M45 is a really great sounding amplifier, especially in class A mode......So the ST-120 has a tought row to hoe......

    ST-120 with Magnapan MMGs IMG_20210311_141524891-vi
    Bob Latino
    Bob Latino
    Admin


    Posts : 3260
    Join date : 2008-11-26
    Location : Massachusetts

    ST-120 with Magnapan MMGs Empty Re: ST-120 with Magnapan MMGs

    Post by Bob Latino Thu Mar 11, 2021 4:20 pm


    Thanks for the photo Roy ..

    The VTA ST-120 runs in Class A/AB1 .. The amp runs in Class A up to about 20 watts and then transitions seamlessly over to AB1 at higher volume levels ..

    Bob

    Tom Pickett likes this post


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