I hacked in a change yesterday and played it at rehearsal last night. I saw this thread and it fits right in. I have flopped between HRM and non-HRM several times; it always seems the choice is ratty or muddy, clean is thin when OD is just right, especially with more than 1 guitar/pickup.
My hack is essentially the 183 non-HRM OD network in parallel with the 101 HRM OD. It requires a 2nd pot somewhere, mine is in the vibrato pedal hole in a SF donor. The -3db points on these are very different. As a bonus you get all of the mixing resistor side effects we all love.
The HRM by itself(non-HRM near 0) sounds thin, responds lazily and gets ratty at higher gain, no surprise. The non-HRM sounds big dark and ballsy but gets muddy on neck HB with higher gain. No surprises here either. The combination seems effective at adapting to the different guitar/PU variations without sacrificing clean sound. Playing it in a band situation, the 2 controls feel like a bass and treble gain, but not in the TMB stack sort of way. I found myself leaving the HRM gain pot at about 11 to 12 o’clock and tweaking the non-HRM pot occasionally to adjust to neck versus bridge PU.
It’s an interesting experiment even if I don’t keep it. A single level/drive control could be done by way of a larger dual pot like 500k and use resistors across the lugs to tune the behavior, could take a lot of work to find magic values.
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The 2nd generation amps have that 3 resistor OD entrance that eliminates much of that Boomy-ness in the neck position that the later 220k/triggers carry which makes the neck Pup (especially a Strat) more articulate and puts it more in the zone sort of speak..2nd generation amps in OD are primary speaking voiced rather heavy in the mids so you get more sing and sustain and cuts through the mix with ease which makes them great for slide as well in both neck and bridge..
As you add more drive or level the OD tone doesn't crunch up as quickly smooths out nicely and wants to sing and sustain more because it's not pushing those lower frequency's.. I can see however how some people miss that low end thickness (in Bridge) the later generation amps w/ triggers have especially if your 2nd generation is a 50w although my 100w still for me serves up some nice low end when you start to push the output section however by this time the amp is for most people and by most standards pretty loud..I have no problems going back and forth on my 2nd generation with my Strat and I too at times find the neck a bit boomy at times on my later Skyliners...FWIW Max posted some clips of his 2nd generation amp (I believe in neck) if you can find them as this will give you a good idea of what I am talking about..My 2nd generation review..
Hope this helps you..
Tony
Last edited by talbany on Wed Dec 15, 2010 8:15 pm, edited 1 time in total.
" The psychics on my bench is the same as Dumble'"
Making the R or the C bigger lowers the cutoff frequency = more bass.
