Okay TB gearhead genius nerds... I have a couple of different but overlapping questions here.
Being the owner of a pair of Accugroove Whappo Jr. cabs, I sorta followed the Accuswitch (a magic switch to change impedance from 4 to 8 ohms) controversy wayyy back in the day. I dropped off Talkbass somewhere along the way, but left with the notion that the Accuswitch does not really perform as intended. With the configuration of my rig (powered by a Crest CA9) there were no pressing issues to worry about.
Fast forward to today. I'm using a Markbass CMD 121P for most gigs, and putting one of the Whappo Jr. cabs under it for bigger gigs. The Markbass is supposed to put out 500w when used with an 8 ohm extension cab, and with the Whappo Jr. it sounds every bit as wickedly good as I might hope - I haven't turned it all the way up, but I haven't heard any hint of distortion.
That said, my bandleader said he thought he heard distortion during a bass solo. I told him I was pretty sure he was hearing some crunchy fret buzz from me digging in here and there, but I wasn't about to dismiss his concerns entirely.
He looked at my gear and remarked that the Markbass might not be pushing enough power to drive the Accugroove. My ears tell me otherwise, but if there is transient distortion I can't hear or other issues I'm not savvy to, I certainly don't want to abuse the cab.
And now the icing on the cake... I'd always left the Accugroove set to 8 ohms and assumed the switch made no difference, but my bandleader flipped it while I was playing and I was surprised to learn that the rig sounded better (better mids and highs) with the cab set to 4 ohms. No noticeable difference in volume, just tone.
So, to try to wind up and distill this down... 1. Is my Markbass combo insufficient to power its internal speakers plus the AG cab? 2. Given the "voodoo" of the Accuswitch, am I risking harm to the Markbass amp by running the AG cab set to 4 ohms, since that would (in theory) reduce the total load to below 4 ohms. 3. What other issues and concerns might I be neglecting here.
Okay, thanks for reading... (whew)