I wish people take certain facts into consideration before recommending.

IMO, the Usher MD1 with a 7" woofer with 87 dB efficiency or the MD2 with two 7" woofers presenting a 4 ohm load would be too much for the SET amp in question.

I did take facts into consideration, the specs for the ushers are the following:

MD1

One dome tweeter

**One mid-low woofer 7"**
Sensitivity 87 dB @ 1 watt

**Impedance 8 ohms**
Frequency Response 38 Hz ~ 40 kHz

Power Handling 90 watts

I had once consulted with Virenji for my Jamo e875's which have the following specs and he suggested the GM70, I was going by that comparison. Here are the specs below

Jamo e875

One dome tweeter "

**One mid woofer 6" **

Two Low woofers 6"

Sensitivity 88 dB @ 1 watt

**Impedance 6 ohms**
Frequency Response 32 Hz ~ 20 kHz

Power Handling 150-220 watts

And here is what I was suggested by Virenji

I looked up specs on the Jamo speakers. Even though tube amplifiers are low powered, you may be able to get satisfying sound using either of these Lyrita amplifiers:

Lyrita Integre Two integrated amplifier (pushpull design, 10 watts/channel)

Lyrita GM70 SET integrated amplifier (single ended design, 20 watts/channel)

I would have bought the gm70 but it was 14k out of my budget so had to go with something else.

The Ushers are about the same if not more power efficient than these e875's which is why I feel the GM70 should be able to drive them. Best way to know is a home test.