Interesting comments on the difference between Pass and CAT. I am fairly certain that these impressions would be possibly reversed IF Ian was using the CAT preamp along with his CAT amps. The synergy between the Pass preamp and the CAT amp perhaps needs to be called into question. There is, however, no doubt of the synergy between the CAT JL7 and the CAT preamp. The neutrality and accuracy of the Pass and the CAT would certainly, IMHO, point to an issue with the match up of this particular pairing. OTOH, the sound tracks chosen to listen to...Lorde and Black Sabbath...leave me scratching my head, LOL.
Are you referring to this audio.de review? www.nataudio.com/products/all-products/vacuum-tube-power-amplifiers/item/download/40_299ad1d9d2800beb72233a27ae97aca7.html. Unfortunately I did not manage to get a translation from german, and people I know who can read it are not audiophiles ... All I could see is that the main negative feature is heat generation and the reviewer fear of the 1400V - already expected from SE tubes! Do you know what was the source and speakers used for this review?
DaveyF, If Ian had the CAT amp and preamp, that would not then change my impression of the Pass amp and preamp, much less revers it making the Pass combination sound euphonic in the midrange, lacking control in the bass and extension in the highs. How could the addition of the CAT preamp to the system change the sound of the Pass amp/preamp combination reversing it to sound like what I heard from the CAT amp/Pass preamp combination?
Regarding needing to call into question the synergy between the Pass preamp and the CAT amp, remember, fellow member, Al M., liked that combination very much according to the account he gave me after he heard Ian's system with that combination. Ian also likes many aspects of the sound with the Pass preamp and CAT amp. I am just reporting that I did not like the combination as much as I did the Pass/Pass pairing, but I did like some aspects of the sound, particularly the way wind instruments (flute and clarinet) and brass sounded. I don't know about "synergy".
My post is a direct response to Ron's question about whether or not I have yet heard Ian's system with the CAT amps. I shared my impressions of the listening we did that day. I was there to directly compare the Pass amps to the CAT amps, in the same system, without changing anything else. Ian facilitated that comparison for me. Ian did not have the CAT preamp in his system when I was there. I will not predict how it would sound in his system or with either of his amplifiers. Perhaps I will hear it some day in his system.
Regarding music selections, we also listened to Johnny Hartman "Once in Every Life", the D2D LP "For Duke", as well as a selection of Ian's wonderful classical LPs, one of which was a cello concerto and another was "Stravinsky Conducts Histoire Du Soldat Suite Pulcinella Suite".
The Lorde and Black Sabbath LPs were used to get a sense of how the CAT amps handled extremely heavy bass, rock music, and amplified instruments, as well as for a sense of energy, liveliness, and rhythm. Those selections are demanding and they told me what I wanted to know, and more. I like a variety of music, and sometimes, when listening to a system as great as Ian's, I just want to listen to music I enjoy and am very familiar with. Please don't scratch your head for too long.
Interesting comments on the difference between Pass and CAT. I am fairly certain that these impressions would be possibly reversed IF Ian was using the CAT preamp along with his CAT amps. The synergy between the Pass preamp and the CAT amp perhaps needs to be called into question. There is, however, no doubt of the synergy between the CAT JL7 and the CAT preamp. The neutrality and accuracy of the Pass and the CAT would certainly, IMHO, point to an issue with the match up of this particular pairing. OTOH, the sound tracks chosen to listen to...Lorde and Black Sabbath...leave me scratching my head, LOL.
Interesting comments on the difference between Pass and CAT. I am fairly certain that these impressions would be possibly reversed IF Ian was using the CAT preamp along with his CAT amps. The synergy between the Pass preamp and the CAT amp perhaps needs to be called into question. There is, however, no doubt of the synergy between the CAT JL7 and the CAT preamp. The neutrality and accuracy of the Pass and the CAT would certainly, IMHO, point to an issue with the match up of this particular pairing. OTOH, the sound tracks chosen to listen to...Lorde and Black Sabbath...leave me scratching my head, LOL.
I owned a Hovland tube preamp for many years and it was always a nightmare trying to match the output impedance to tube or solid state amps. The finicky nature of matching between brands, topologies and output divices cannot be over stated.
Peter, while the addition of the CAT preamp won't change your impression of the Pass gear;it most likely will show you how the CAT pairing can surpass the Pass gear in areas that you currently find the CAT gear lacking in relation to the Pass/CAT pairing.
IME, a pairing of a ss preamp and a tube amp is not the ideal solution. OTOH, the pairing of a tube preamp and a ss amp can sound great.
An interesting combo would be a new CAT preamp with Ian's Pass amps. Although, I am pretty certain that combo would still not sound as great as the all CAT combo.
Perhaps YMMV.
I have heard the big Stenheims this year, and thought they sounded medicore (at best).
Most isolation techniques, footers, etc have an adverse effect on bass, and some parts seem lost. Haven't tried on HRS stands but does not surprise me.
And Ian, are you sure the amps changed "dramatically"?
So this morning I re-inserted the HRS stands. It's like I had different amps - tonally it was more towards solid state in terms of openness and brightness with less midbass. Actually sounded pretty good (the amps are fully broken in now compared to when I last had them on these stands).
But there's no doubt it changes the character of the presentation. It's not subtle.
Davey,
Absent some technical incompatibility such as an impedance mismatch, if Peter found the CAT amps to make Ian's system sound "far too syrupy, transients were blunted, rhythm was lost and the bass was bloated/fat" why would adding more tubes ameliorate Peter's impressions?
I remember that Ken's original and primary claim to fame is his revered pre-amp, but why would adding a tube pre-amp, which is not known for sounding more transistor-y than transistor pre-amps, add back some of the solid-state sonic characteristics Peter prefers?
Ken used to tell his clients who absolutely needed a solid state amp to use the Symphonic Line Kraft, full class A, 400w (now in 250 and 300w configs), doubling down to 1 ohm, from Germany. It used to work perfectly fine with his CAT pre and was voiced with it.
Caesar uses that config with his MBLs. Haven't heard the amps myself but sounds like a good combo for tough to drive speakers. There is also a guy in the US who restores and mods the amps. Loads of feedback on the Gon.