mijknahs wrote:What speakers are you using? Maybe the MosValve was coloring it in a brighter way and the Mac is more neutral? How about the settings of the SMS? Bass off? Treble up?
jeager wrote:Sounds like something is funky to me. MC250 should sound exceptionally clear not muddy at all, even if you add some bass with the preamp...my impression was wow how very clear/clean and pleasant sounding. Nothing dark, no unpleasant qualities at all ...
TRG wrote:Good point...maybe the MosValve was coloring it in a bright way and I've gotten used to the sound over the past couple of months, but I don't know...it just doesn't seem like the mac would be this this dark, with the SMS set the way I have it??
I keep switching back and forth between the mac and the MosValve for comparison and I can't beleive how much darker the mac seems to me?!
mijknahs wrote:I have a MosValve and it doesn't really sound drastically different from the McIntosh amps I've used (I mean my wife can't tell them apart). They both should have a similar brightness. The McIntosh should have a better "depth" to it but the brightness should be there too.
Pete B. wrote:I have and use both of those amps.
The Mosvalve has that "Presence" knob, so if you are used to running that fully clockwise that would be as treble-ee as the Mosvalve gets. I typically run that knob around 2o'clock.
But all in all I don't notice a drastic change like you are mentioning.
The Mac is a little "Blurp-ier" in a Jerry-esque way, but I don't dectect any treble cut compared to the Moss.
I have the 962 in a rack with an Alembic F2B and Lexicon LXP-1 Reverb, as another grab and go unit.
This is all based on general use of those units, not side by side test.
I think I will be able to to do an actual side by side test today or tomorrow to simulate your issue. I will report back.
Pete B. wrote:Hey so the Wife and Daughter split for Target, so I just ran your test.
The Mossvalve is definately treble-ee-er.
My Dual Showman Reverb has two Pre-Amp tap outputs.
I ran one to each power amp input.
Then I switched the speaker cord (1x12" JBL-E120) back and forth several times to set levels (basement volume).
So I had the guitar on full for vol/tone knobs, and used the Standby switch during speaker cord changes, so I could go pretty quickly from amp to amp with all else being equal for the most part.
So with the left channel of the Mac at around 10 o'clock on volume, the Mossvalve Channel A was on about 9 o'clock volume.
By trial & error I found I had to set the "Presence" knob on the Mossvalve at about 10 o'clock to get the treble-ee stuff to match the MC250.
I was playing a Tiger modded Strat mainly using middle or bridge in single-coil.
I was running licks from Cumberland, West La, Slipknot, Eye's, both chords and single note runs, up and down the neck.
So I would say that if you run a test-fire with these conditions, and find it's still night and day, then maybe you could demonstrate the same test to your old (or new) Tech, for... "Furthur Diagnosis" [Oh Man, I just came up with a Furthur Tribute Band name! ].
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