STM 900 arrived yesterday! I live in Italy and it has been a long wait, 35 days from the date of the order. In this moment I have no possibility to hook the amp to my cabs. For now, I can review some particular situations, rehearsal and gig impressions will come soon.
Basses used for test: Warwick Thumb BO 4, Mayones Comodous classic 5, Fender MIM jazz bass modded with Nordstrand Nj4s and custom wiring. Every bass mounts rounds. The Mayo is strung with DR Hi-beams, The Wick with daddario Xl nickels, the Jazz with Dr LO-Riders. Technique: fingerstyle, some chords and harmonics. No slap.
good quality headphone tone (through a AKG K240 studio), even if like may contenders the in-ear volume is always too loud and very difficult to tame. My studio-quality Hp shows every detail and the preamp of the STM is really delivering, in term of detail and feel.
THe DI is medium-high quality, and maybe a little less lively than my T-funk, changing basses and other variables yelds predictable change in the final result. The two major pluses are without doubt the following: warm tubey tone and low noise (no hiss, no Hum).
General impressions on tone:
I do not agree that the amp is not articulate, and I feel that it does not lack mids, the fact is that you will experience a ton of bass, so the other frequencies are somewhat masked and the end impression is a certain scoop with all the tone controls at noon. Low gain settings, think between 9 and 12, produces accuracy. A clean tone with a good high-frequencies detail and an accented scoop tone, the bass is clean and very powerful. I found so may useable tones lowering the bass knob to 9-10, and the others knob flat or with the 2.5 K boosted a little bit, think 1-2 o' clock. The high knob cuts really well, almost in a passive manner but personally I did not like any boost, as this procedure brings too much zing and string squeack-noise. With this controls setting you can find all the tones tweaking the gain knobs. The gain network of this bass is rather complex and unserstanding this points helps to unleash the tonal capabilities of the amp. With the gain button off, you can raise the gain knob and the preamp gives you added harmonics, warmth, and a quite appeciable fulness in the midrange that makes the tone less scooped. with the gain maxed you can really feel a sort of "sag" in the attack of the note, but, and this is the miracle, the map tracks all the subleties and every other information you throw at it. Even fast runs remain very very intelligible and articulate. Push the gain button and with high-output basses you are rewarded with a transition from tubey soft breackup and added harmonic content to full blown nasty overdrive. In that extreme setting, that I will not use so much, the tone is rather annoying but if you lower the highs knob the tone warms up really nicely. More info bass-dependent will come soon! Stay tuned, ciao
