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Rogue Audio M-120 vs M-150

Hello;

I've had a pair of Rogue Audio Magnum M-120 amps for about 18 months now and drive them with a Rogue Audio Magnum 99 preamp. I've been extremely pleased with them, to say the least. Well I recently called Mark of Rogue Audio to order a new set of output tubes and he made me a great offer on upgrading my amps to the newer M-150's. Unfortunately there is no place near me where I can listen to the M-150's so if I upgrade it will have to be without hearing them first. Mark thinks I would be happy with the upgrade and he hasn't steered me wrong yet, but I was hoping to get some additional input before making a decision.

Mark tells me that the newer design produces far less heat, has about double the output tube life, and is more dynamic and transparent. Given how pleased I've been with my current amps I'm more than a little hesitant, but if I can take my system up a notch at a reasonable price, why not? Any input will be greatly appreciated.

Have a good day
Brad
a292
scottht
398 posts
 
Oh I know. A few years ago I had a HK AVR85 for HT and music. It didn't work for music at all. I was also running Paradigm speakers and that was a shame also.
Finaly had to build all new HT and Music systems.
My brother in-law had his M120's converted to the 150's. He said it is a big change for the better. This does also include adjustable bias for 1 tube i believe. Must be the 12ax7. and has a meter.
He is in Florida and I am in NY so I haven't heard them yet.
I know he paid $1400 for the upgrade including the face plates. The new fronts are quite a bit thicker than the old 120's plates.
a292 OP
16 posts
 
Hey thanks Scott! That's considerably cheaper than the price I was quoted ($1795 - there, I said it). I'll have to figure out how to subtly approach Mark about it, although depending on how long ago he did it maybe the prices just went up.

Actually the bias is individually adjustable on each output tube. There's a switch for each output tube to divert the bias current through the meter for adjustment.

I used to use the HK for everything too. Now the HT shares the same front speakers as my two channel system. I just have a separate set of speaker cables for each setup with banana plugs on the speaker end so I can easily switch back and forth. I had to eliminate my center channel speaker to make room for my tubed pre amp but that's the way it goes... I listen to the two channel system FAR more than the HT so any sacrifices have to come from the HT setup.

Brad
scottht
398 posts
 
He had it done about 3 months ago.
killerpiglet
374 posts
 
Brad,

I spoke to Mark and he said they had to raise the prices because they were not making a profit; it seemed they underestimated the cost of the upgrade.

The new price does include a new set of KT88's. I won't be using them much, since I have GE tubes in the amps now, but they'll be something else to play.

KP
scottht
398 posts
 
I was going to suggest the same thing. Maybe ask for the price without the KT88 tubes.
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