Anybody using Wilsons or Soundlabs with Pass Labs?

Wow! what a lot of interesting responses. I would have never guessed the Aleph models could give satisfactory service on the big speakers.

I have a pair of Wilson W/P 6 and tried a Pass 350 when I was looking for amps. The Pass was a very nice amp but just didn't do it for me. There was nothing wrong but I felt the magic wasn't there. I ended up with Atma-Spere MA1. The only thing I can suggest is giving them a listen.

Ferrari, Did you see Roma's post (Should I sell my Diva?) Could it be there is a dichotomy in perception when it comes to bass response? Shall we say, hi-fi bass, found only in audio, epitomized by truck bed mounted mega woofers, versus natural bass - like the baritone and kettle drum. I would want an amp that gets the texture and timbre of these big wave producers right rather than an amp that will substitute accuracy for cracking the plaster. My X-600 is of the former.

Fdriver has an interesting perspective. One could order/update with the SL biamp option. One could then put Alephs or X series amps on the top end and perhaps Wolcotts on the bottom, or MAs if you wish. Or even 4 channels of Pass amps, if your electrical system is up to it. I believe the new crossover configuration offered as an update by SL would lessen the bass taste issues some of the correspondents cite. I feel recordings vary in bass impact much more than the excellent electronics all the correspondent refer to. Others, credible others, have used the Sunfire 300 watt on the bass and the Wolcotts on the top. HAve fun!

The purpose of my post was not to "insult" the Pass Labs X600. I was mearly pointing out that the amplifier's bass performance (Sound Labs can hit 50 ohms or higher here!) is not acceptable. This includes playing the same recording on other speakers and taking into account the expected bass on a variety of other speaker / amp combinations. I also use test CDs that put out bass tones; the Pass just didn't like the Sound Lab impedance. That does not mean the Pass is a bad amp; in fact, when paired with the appropriate speaker, it is an outstanding amplifier.

The true test of being a real Audiophile is acknowledging that not every component in Stereophiles "Recommended List" will work correctly with other products on the list. The key is to build a system where each of the components compliment each other, instead of exposing weaknesses such as impedance issues - low or high. This is not an easy process, but very rewarding when done right.