Hi Borg7x9,
Have you looked at VAC preamps? Although it is out of production, the Phi Beta will drive loads as low as 200 ohms, according to its manual. The Signature 2A, which is the basically the same circuit and is still in production, should do the same. Neither are cheap but do come up on the used market. I have a Phi Beta and it is a great piece. Might be worth a quick call to VAC.
Have you looked at VAC preamps? Although it is out of production, the Phi Beta will drive loads as low as 200 ohms, according to its manual. The Signature 2A, which is the basically the same circuit and is still in production, should do the same. Neither are cheap but do come up on the used market. I have a Phi Beta and it is a great piece. Might be worth a quick call to VAC.