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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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    KEF LS50 Meta with VTA ST120

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    Rbertalotto


    Posts : 73
    Join date : 2021-02-25

    KEF LS50 Meta with VTA ST120 Empty KEF LS50 Meta with VTA ST120

    Post by Rbertalotto Thu Nov 25, 2021 5:44 pm

    "The LS50 Meta has minimum EPDRs of 1.66 ohms between 135Hz and 140Hz and 1.7 ohms between 660Hz and 725Hz, both regions where music can have high energy. The partnering amplifier needs to be comfortable driving 4 ohms"

    Any issues driving them with my ST120?
    Bob Latino
    Bob Latino
    Admin


    Posts : 3101
    Join date : 2008-11-26
    Location : Massachusetts

    KEF LS50 Meta with VTA ST120 Empty Re: KEF LS50 Meta with VTA ST120

    Post by Bob Latino Thu Nov 25, 2021 7:42 pm

    Rbertalotto wrote:"The LS50 Meta has minimum EPDRs of 1.66 ohms between 135Hz and 140Hz and 1.7 ohms between 660Hz and 725Hz, both regions where music can have high energy. The partnering amplifier needs to be comfortable driving 4 ohms"

    Any issues driving them with my ST120?

    Hi Roy,

    No ... We have a number of VTA amp customers driving planar magnetic and electrostatic speakers that also go below 2 ohms with no issues. Your VTA ST-120 will be able to drive those KEF LS50 Meta speakers without any problems. The pentode ultralinear output stage, as found on all the VTA amps, is the best TUBE output stage for driving complex, capacitive or low resistance speaker loads.

    Bob

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