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
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
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
I was going to suggest the same thing. Maybe ask for the price without the KT88 tubes.
I originally found out about the upgrade when I called Mark to get a new set of tubes for my M-120's. The KT88's were going to cost me $300. As you mentioned the upgrade includes the KT88's. It also includes all the small signal tubes. I actually pulled all the tubes out of the amps before shipping them.

I asked Mark to install a set of his favorite small signal tubes instead of the stock ones. The ones out of the M-120's are still fine so I'll have something to compare them to. I always wanted to try different tubes, just never got around to it. Once I finally got my system set up properly I was happy just listening to it, didn't touch anything for about 18 months - until now. Every time I would think about any kind of "tweak" I would wind up turning the system on for a while first and then, so much for the tweaks. I could never bring myself to shut it off to mess with things... I may be in the minority but once my system is sounding good I very much prefer to just listen rather than to keep tweaking it. In fact until I talked to Mark I had no plans to change anything, just knew I would be needing new output tubes soon, and he had to go and tell me about the upgrade... :-)

Have a good day
Brad