CMI Electronics SG100 Guitar Power Amp

Amp is circa 1973/74; 100W RMS
2 Channels, 1 w/ "Notch Shift" (amp tone changes), "Wave Form" (fuzz-ish effect), spring reverb, and what looks to be an old Maestro, built-in phase-shift effect.
Back in the day, (when disco balls roamed the earth), I used to play my prized Fender Jazz through it; bought this amp head mainly for the built-in effects
After recently excavating it, I'm curious how it would sound with guitar, in a recording studio setting; either with a good 4X10, 2X12 or 4X12 cab, or I'll check to see if I have a line-out or 2nd speaker option to DI the thing.
Plenty-o-power for me and what I do, (jazz, blues, R&B, some rock).
Something that MIGHT be interesting: I'm not positive, but I THINK these amps are Solid State input, but tube OUTput. I'm used to tubes warming things up on the input and having solid state power going out.
In all that I've seen about these amps, I've seen people talk about the tubes, etc.; but I haven't noticed anyone mention this specifically. (?)
(Any user/technical info would be much appreciated on this/these points?)

This amp CAN play quite loud; but I tend NOT to play particularly loud. It's been extremely versatile for the things that I've asked it to do (again, blues, jazz, R&B, and occasional rock). Has a great "clean" channel - sans effects; and has some very unique (in-a-good-way) sound on the "effects" channel. Good spring reverb. "Notch Shift" gives slightly different amp tone, (Fender-ish, Standel-ish, etc.), but the differences tend to be subtle to my ear. Built-in phase shift has 3 "speeds" and came with a loud-clicking footswitch that I lost about a decade ago. With a limited or non-versatile guitar, "Wave Form" by itself seems a bit cheesy to me, but when combined with tasteful splashes and dashes of the other effects you can come up with something interesting.

I've had some trouble in the past, (I believe transformer, but I was between gigs with little time so I was in a hurry and didn't get specifics), but I think it was because of an "uninformed technician".
Because of this, I'm not sure that I'd use it on a gig w/out backup; but I plan on educating myself on the input/output - solid state/tube issues of this amp, and that might improve my sense of the amp's reliability.

I'm giving a 9 because I HAVE dealt with some folks from Gibson fairly recently, (CMI/Norlin/Gibson back in the day), when I was trying to get what must be an archival schematic on the wiring of this beast, and the people I dealt with were great! I actually got a .PDF of the schematic that I can blow up and take with me to a reputable amp-repair shop.
I've had it repaired a couple of times - over the past 3 decades - but the warranty was long-gone; subsequently, I haven't worried about an authorized service center in a long time.
Pretty sure the warranty was 1 year, way back when.

I'm going to rate this as a 10-Fantastic Value mainly because digging out this amp is like bumping into an old, dear friend and picking up where you left off! Sadly, I have been playing for over 30 years now.
If this amp were stolen, I'm not sure I'd be able to find another since they stopped making them. I'd love to buy another working model; but I doubt that I'd find one again.
Love finding an old workhouse of an amp; hate how ungodly heavy the thing is!?! At the time, I was comparing it against Fender's and Marshalls; but couldn't afford them and with the power and built-in effects, I went for the CMI/SG Systems amp (remember, I was a kid)...
Bass player by trade; but also play keyboards & guitar.
Sold my prized '75 Fender Jazz bass a year ago (I still mourn the loss); MusicMay StingRay5 fretted & fretless, both w/ added piezo bridge pickups; Warmoth Tele '72 Custom w/ RioGrande MuyGrande Twangbucker bridge & MuyGrande Humbucker neck - push/pull single/humbucker setup; Yamaha Silent Guitars, nylon & steel; SWR Super RedHead bass amp; SWR BigBen 18" ext. cab; Fender HotRod Deluxe w/ 1X12" Celestion Vintage 30; TraceElliott TA50R acoustic amp; Yamaha S80 keyboard; Yamaha PSR500 synth/midi controller; Edirol midi-controller;
Also have project studio recording gear: Dell audio PC sequencer setup running Sonar5; Yamaha AW4416 hard-disk recorder/mixer; Avalon U5 DI box; dbx 376 tube mic-pre w/ digital conversion, compressor, de-esser, EQ; old M-Audio DigiPatch digital patch bay; M-Audio MidiSport 8X8 midi patch bay; Roland M-1000 digital mixer; Yamaha Motif Rack tone generator; Line6 Bass POD Pro; Line6 PODxt Pro; old AC-powered Boss GE-10 graphic EQ (like Eddie VH used to use!); AKG C414B-TLII & AKG C414B-ULS mikes; two AKG C1000s mikes; AKG C2000B mike; Sennheiser 609 guitar amp mike; Sennheiser 935 live vocal mike; Assorted Waves, Arturia, Native Instruments, East-West, Q Up Arts, Antares, and other software instruments and effects; KRK V4 active studio monitors w/ subwoofer; M-Audio SP5 active studio monitors; old SpeakerLab passive studio monitors; (all for A/B/C comparisons); old Kenwood KA-80 50W/side hi-speed solid state stereo amp