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OTL, Output Transformerless Amplifier User Group.

Re: List of speakers suitable for OTL amps.

Hi Lew-

yes, there is some varience in the Sound Labs!! Depending on the vintage, ZEROs can help a lot. I recently heard a *new* set of A-1s running with MA-1s and the tonality was utterly neutral with a presentation stunning in its overall musical nature- I totally get why the speaker has such a following!

Paul Bolin based some of his comments on the MA-1 in his review several years ago while using Appogee Duetta Signatures, which are 4 ohms and arguably the best of the Appogees. Other Appogees, like the old Full Range, need either ZEROs or the Atma-Sphere Z Music device to work with almost any tube amp.

The people at Magnaplanar maintain that the best they ever heard the MG-20s was with MA-2s. MA-1s make a good showing on them too. To do well with M-60s the ZEROs are required.


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