Audio Research REF 110 or Ref 75

Vdosc, take a look at this Wilson Watt Puppy 6 review. Just above the section titled "Comparison" is a comment from Dave Gordon at Audio Research that talks about using the 8 ohm tap on the amp even though the speaker is 4 ohm. Even if you decide to get a new amp, it appears the speaker/amp combination may be best using the 8 ohm tap.

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Zd542, Lak & Vdosc, Would a subwoofer be a possible solution
in this scenario?
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I've had watt puppy 7s and Sasha paired with a ref 110 with 6550s and then kt 120s and I too thought it was a great combo but a little light below. The ref 150 made a big difference and I've heard the ref 250s sound even better. My guess is the ref 75 will be an upgrade but a used ref 150 would be a marked upgrade.

Thanks, this is very useful information, and I do have a sub a JL 110 but I prefer to get the most out of the Wilsons. The sub is really too low, just rumble great for Movie but not as tight and punchy as the Wilsons. It does help a little when listening at very low volumes. I can use it as kind of a loudness control.

I have the reference 75 and auditioned it on wilson Duettes, a different speaker I know. I compared it with a Ref 110, upgraded with KT120 tubes and I found the Ref 75 significantly better and certainly powerful enough for the speakers.

When I auditioned the amp, it was on the recommendation of a review in a UK magazine. The reviewer bought the amp himself and commented that 75 to 100 watts has always seemed to be the area that ARC produces great amps. Having heard the ref 110 and 150, I think he is right, the ARC ref 75 seems exceptional, even compared to the 110 and 150.