Tube Amp for Magnepan 3.6 - Rogue Zeus/VTL-MB450


Hey Audiogoners,

First post to A-gon and I need your advice! I've researched this site extensively, read thousands of your threads, and purchased good product through you folks. So here goes.....

Bought a used pair of Maggie 3.6Rs -absolutely love them! [Chose over ML Odyssey, Ascent i (also liked), Maggie 1.6] They're accompanied w/Supernal tweeters and an AMC B1-20 sub. I'm upgrading my stack from ss to tubes. Caught the addiction! Having listened to tubes while auditioning e-stats/planars, I've concluded that they just make the sound more "real life" -at least for my taste (go to alot of live shows). I just love that sound!

Also picked up a used VTL 2.5 tube pre-amp along with the 3.6s. Had no prior knowledge of VTL. The 2.5 presents a beautiful large deep soundstage (3D), brings everything to life, sounds tubey -not overly tubey. I've heard some pre-amps I like better (Viva Linea), but at a much higher price point.

So, I want to upgrade two things -Amp and CD

Amp:

Having had such good experience with VTL, I'm tempted to pick up a used pair of VTL-MB450s (at half list), never having heard them. Also considering Rogue Zeus (used)-listened through modest set of electronics/speakers. The Zeus is so powerful that it actually carried the entire system. Bass is tremendous -best I've heard in a tube amp so far. Could have been a tad more articulate in the mid/highs, and didn't present a deep soundstage, but I'm tending to attribute these limitations to the electronics/speakers that accompanied the setup. My sense is that the Zeus could power my 3.6s very well, and drive them to their potential. Zeus is also very well made. Liked the warm standby switchable mode as well as built-in tube biasing. Knocks -it's So friggin' heavy (even more of a monster in real life), & pumps out a ton of heat. Definitely an Uber-amp.

Is there anyone out there in Audiogondom who has listened to both the Rogue Zeus AND the VTL-MB450, and can give me a real life comparison???.....

Other products I've auditioned ...to give a sense of my listening tastes (please DO NOT BE OFFENDED as I'm not trying to knock a brand of gear you may own; it's all good):

ASL Hurricanes - listened opposite Zeus, w/better electronics/speakers. Found them to be more articulate (tubey) in the mids (real nice), lean highs, definitely light bass (compared to Zeus).

Jolida 3000 monos - sounded decent w/3.6s. Tad syrupy. Definitely not the bass slam/quickness of Zeus. Good sound none the less.

Sim Audio Moon W-5 (I know it's ss, but comes highly recommended with the 3.6s) - listened while auditioning Metronome tube CD (w/Moon stack, Triangles). The whole setup disappointed me. The sound was flat, not dimensional. Maybe it was the setup. I'm still stumped.

Can't find Wolcotts in my area. Haven't auditioned VAC.

So, VTL-450 or Rogue Zeus? And why?

Second question, CD.

Tubes?

I really like the Shanling 200 sound, but have heard consistently horrible stories (from 3 of 4 dealers) about reliability. Heard they've addressed firmware issues, but still leary about dropping bucks on a unit with double digit failure rate.

Others...
Metronome CDv2 demo - just sounded flat an uninspiring (maybe it was the system).
Jolida 100 modified - sounded good; lively, crisp, warm but not too tubey.
AMC DB6 modified (with an AMC DAC9 modified) - decent, but not as articulate or sweet as Shanling, not as crisp as Jolida, and didn't seem all that well built. I do like the DAC9 by itself though.
Eastern Electric Mini Max -good for the money, well built, but simply can't compare to Shanling sound.
Audio Research top loader -didn't enjoy w/Krell stack
Musical Fidelity 308 -beautiful crisp highs; maybe should audition w/tube stack.
Wadia 861, McCormick ($3K) -just didn't enjoy them

So, I'm stuck. I like the Shanling sound, but not its Word Of Mouth reliability.

Any other suggestions? Next on my audition list is the Cary 308t. Remember, I'm looking for that warm, lively, beautifully finished sound -but not too analytical.

Sim Audio Moon Eclipe? Rega Jupiter? Other?

Thank you folks.
angelsmtn

Showing 4 responses by eldartford

And furthermore...I still think that a much simpler mod (that what EA and RAM are doing) would be almost as good. Parts...$200. Labor...$200. Profit...$300. Total cost $700. Maybe I will play around with one of my amps after all.
Rooze...The bridged zr1600 is good for 1600 watts into 4 ohms, and biwire makes no difference.

However, neither the Carver or the Krell is delivering anything like this power. If it did, I don't know if your ears or your speakers would blow out first! There are characteristics of an amp that just naturally go along with high power capability, and these characteristics, rather than the high power per se, are what makes a high powered amp sound better.

I tend to believe that the 600 watt capability of the Carver is enough of a good thing for your Maggies, and that bridging them is overkill. I am not surprised that you found the single stereo amp configuration equal to the bridged one. The only rational use for the second Carver would be biamping, using an electronic crossover.

I think that the "giant killer" description refers to a modified Carver. There is a lot of low level signal processing that is useful for the pro sound application but unnecessary for home audio. This circuitry is easily bypassed.

However, even in stock form I think that it's a damn good amp, and using it instead of one of those "giants" makes it possible for those with limited funds to spend several grand more on speakers. Such a speaker upgrade more than equals any subtle improvement through other amps.
Rooze,,,A Mod to the Carver will cost a lot less than the VTL 450. I would be most interested in more info on zr1600 mods. I really think that a simple inexpensive mod to bupass of all the low level signal processing circuitry, and upgrade of a couple of capacitors and OP amps would get you most of the Mod benefits. I can live without silver wire and new binding posts. I would almost do it myself, except that the circuitry is all surface mount and tiny components that make the physical job a lot harder than what would appear on the schematic.

Do you know that on the Carverpro website you can download schematics of the zr1600, and see what we are dealing with?

How do you deal with fan noise? I have three of the super low noise fans to install in my amps, but I have never got around to doing it because my amps are located in the cellar and I can't hear the fans anyway.
Rooze...If I were you (which I am not) and I needed to spend some more money, I would Mod one of my Carver amps, buy a Marchand Electronics crossover, and biamp my Maggies, with the Mod amp on top.

You already have the Carver amp, so the cost is $1700, not $2450. Can you really get the pair of VTL 450 for $3750, Used already. Are you ready for the upkeep costs of a big tube amp? I am sure you will want to upgrade all the tubes right away.

Are you having fun yet?