hello all

AFAIK, stereo 4ohms can be bridged to 2ohms mono (2x8ohms bridged to 4ohms mono). A search around should confirm/rubbish my op. I do get these things wrong sometimes as the lateness hits me (ie, my flimsy knowledge heads South). Hope this helps, but do check first.

Twizza, thanks for the details (and I’m glad the combo got resolved). Here’s some late-night ramblings from a bassman…

Although I don’t have Avatar cabs, I hear very good things from The Bottom Line forum about Dave. You will, most likely, get more useful ops from him than me, f’r’instance. The 1960, OTOH, is an off-the-shelf Marshall cab and I bet you get little pre-purchase support compared with Avatar.

OK, cab construction. Absolutely nothing wrong with birch-faced plywood. Good compromise of lightish weight, rigidity and the right sound. Medium Density Fibreboard (MDF) weighs a ton and comprises floor-scrapings held together by resin-yack. You can go the whole hog and look into Thiele-Small parameters (I can’t even remember the correct spelling) but good cab makers have already done this.

Secondly, the stereo thing. The Randall has a stereo chorus. I’m not that big-dealed on the usefulness of stereo chorus (maybe for Def Leppard?) but remember that a stereo speaker cab is only as good as the separation. If you have a 4×12″, even wired up separately for stereo, it won’t sound much different from mono. Imagine your hifi with the speakers stuck together – not very stereo.

The 4ohms allows the max possible output. I’m surprised at how conservative the claimed increase is (120W vs 100W) so I’d guess ‘bad’ distortion is not an issue. I’m not over-keen on your previous advice. The 8ohm would only sound better if a lower impedance were stretching things and you were diming it. Doubt very much if the slight increase in W for 4ohm makes things pear-shaped.

In all humility, though, I think you’ll get more sense bouncing this off Dave at Avatar. FWIW, I think those cabs look cool and are reasonably priced. Choice of drivers, too – well worth sending another e-nquiry.

Twizza, I had a look around but I’m confused about whether you’re looking for a cab for your RG200 combo, or for a different head (the 200 stereo chorus?). Please post up all the relevant model numbers you’re interested in. Avatar should be able to direct you to what you want, though – it’s their line of business. HST, I’m happy to chip in with an op if you’d like one.

BTW, as I understand it, two 4ohm cabs in stereo is effectively 2ohm bridged mono, but my head is airline-fuzzy 3am, and I’ve been wrong before. I’ll attempt cool reflection later.

Twizza, I’ve just got back from my hols, so this is off the top of my head. I’ll need to look at the Randall site, and Avatar.

Basically, a SS head will put out more vol if the cabs are of lower impedance. If you were home-making a 4×12″ (as your previous posts), I would parallel two of the G12Ts to one input (4ohms) and parallel the other pair (also 4ohms) to another input. Your stereo out would then put out the max vol. The Avatar cab you mention would be best as 4ohm version, but please post up the model numbers and I’ll happily have a look at the sites. Both Randall and Avatar’s tech support should also reply to your emails quickly enough.