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    M-125's driving Magnepan MMG

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    OH Dave

    Posts : 2
    Join date : 2015-03-15

    M-125's driving Magnepan MMG

    Post by OH Dave on Sun Mar 15, 2015 1:45 am

    I'm currently using SS amp 100 wpc into 8 ohms and 200 wpc into 4 ohms but am interested in the improved soundstage of tubes. My concern is the driving the Magnepan MMG's with possibly less power into 4 ohms than I am using now.

    What experience has anyone had with the M-125 mono blocks driving the small magnepans.

    audiobill

    Posts : 270
    Join date : 2014-03-13
    Location : Philadelphia

    Re: M-125's driving Magnepan MMG

    Post by audiobill on Sun Mar 15, 2015 7:00 am

    They drove my 1.7's just fine.

    Bob Latino
    Admin

    Posts : 2415
    Join date : 2008-11-26
    Location : Massachusetts

    Re: M-125's driving Magnepan MMG

    Post by Bob Latino on Sun Mar 15, 2015 9:17 am

    The VTA amps drive complex loads like planar magnetic speakers very well with no issues. Before the development of the VTA M-125's in 2010, I had a pair of Magnepan 3.6R speakers downstairs that I use to drive with a PAIR of VTA ST-120's in a vertical biamped configuration. See photo below. In 2011, I sold one of the ST-120, brought the other one upstairs to use in another system and now drive the Maggie 3.6R's with a pair of M-125's. (lower photo) They do a fine job ...

    Bob



    M-125's now driving Magnepan 3.6R speakers




    zx

    Posts : 194
    Join date : 2011-08-05

    Re: M-125's driving Magnepan MMG

    Post by zx on Sun Mar 15, 2015 11:34 am

    Great work Bob............cool looking Amps..
    Magnepans & Apogees love tubes ...I think the M-125 should drive most Speakers...




    Thanks for the site bob....

    deepee99

    Posts : 1337
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: M-125's driving Magnepan MMG

    Post by deepee99 on Sun Mar 15, 2015 2:21 pm

    My old Maggie 2Gs ran fine off the M-125s. Problem was, when I got the Mags, their tweeter coils were toast, so I lashed a pair of Heil ESS up to them in parallel to boost the high end, which dropped the effective load to about zero. Not a good idea for a tube amp. At least the rectifiers didn't think so. But that was my fault.
    I would definitely hook speakers of this type up to the 4-ohm taps off your output xformers.
    You might ask Magnepan directly for their advice at:
    http://www.magnepan.com/contact
    by phone.
    Despite their fame, it's a small, family-owned and operated company. No corporate BS. The daughter answers the phone, and routes you directly to the old man unless he's out ice-fishing.






    wgallupe

    Posts : 85
    Join date : 2014-05-18
    Age : 62
    Location : Central Mass.

    Re: M-125's driving Magnepan MMG

    Post by wgallupe on Sun Mar 15, 2015 4:23 pm

    I'm gonna have to bring my MMGs upstairs and try them with the ST-120 / SP-13 / PH-12!

    deepee99

    Posts : 1337
    Join date : 2012-05-23
    Location : Wallace, Idaho

    Re: M-125's driving Magnepan MMG

    Post by deepee99 on Sun Mar 15, 2015 7:44 pm

    wgallupe
    If your Maggies are old and tired, as mine were when I bought them off the Bay, the top-end windings may very well be shot. The company will send you a treble-end re-wire kit for IIRC about $40. I was too lazy to go to that trouble, hence the Heils in parallel which arrangement kept blowing up rectifiers.
    Your VTA amp(s) will bring out the Maggies' mid-range that is nonpareil.
    Good hunting
    -d-

    pedrocols

    Posts : 64
    Join date : 2014-11-24
    Location : Western MA

    Re: M-125's driving Magnepan MMG

    Post by pedrocols on Sun Mar 15, 2015 8:50 pm

    I am currently powering a pair of MG 1.7 with the M-125s. What I noticed is that they "sound better to me" with amps in pentode mode.

    OH Dave

    Posts : 2
    Join date : 2015-03-15

    Re: M-125's driving Magnepan MMG

    Post by OH Dave on Sun Mar 15, 2015 10:12 pm

    Thanks for the quick responses. Looking forward to building the M-125's

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