Bill Fitzmaurice

They use 6 ohm drivers in the 6x cab, a pair of them in series would explain the 12 ohm option. But you can't wire them to get 4 ohms from a 2x, only from the 6x.

The shipping should be moot as I'd want to make sure the buggering wasn't just cosmetic.

Give them a low ball offer then redo the Tolex yourself. I try before buying.

That's where the voltage and amperage ratings come in. Most wire is rated at 600V. A 1kV amp into a 4 ohm load is 63v. 14 gauge wire is rated at 15A. Said 1kV into 4 ohms is 16A. However, those ratings are for constant full voltage and current. Amps never run at constant full voltage and current. Even 50% duty cycle would be unusual.

There's only one case where that makes sense, that's when you have a 2x that's 8 ohms and a 4x that's 4 ohms, with all six drivers being identical, and the amp is rated for 2 ohm operation. Otherwise go with the one cab that gives the better results.

Kid stuff. When in college my bassplayer (I was lead guitarist, sorry...) asked me to design him a no holds barred cab to house three fifteens. I modified the Jensen Imperial folded horn to fit them. It stood some 6 feet tall, 3 feet wide, 2 feet deep. He made it from 1 inch MDF. We never knew how much it weighed but it took all five of us to lift it in and out of his van. We named it 'The Hulk'. 🫢 Entwistle would have been envious.

Exactly that. All else being equal, although it never is, four tens have 6dB higher sensitivity than two tens. That's equivalent to a four fold power increase. It's more complicated when the drivers and enclosure tunings aren't identical, and they're not all parallel wired, but for the most part adding drivers alone without adding power will still go louder.

Perhaps. Since the lows from your own speaker radiate omnidirectionally they should not be in the monitors. The mids and highs are directional, so they should be in the monitors. For that reason the bass feed to monitors should be high passed at the transition frequency to directional, around 250 Hz.

"If it sounds good it is good." -Duke Ellington

20,000 mAh sounds impressive except mAh stands for milliampere-hour. That means a more sensible/honest rating is 2 Ah. That well may be compatible, but you want to be sure of it, and that the USB cable is rated for at least that.

Because both amp and speaker ratings are written by marketing departments, not engineering departments. Watts sell gear, amperes and volts don't. Wire capacity ratings come from engineering departments.

I would think that putting a mic in front of a double bass wouldn't work well, if at all.

That's why the cabs have two jacks. Make sure the impedance load isn't too low for the amp.

Close enough, side by side you wouldn't be able to tell the difference.

Blue Aran has them listed but with a long lead time for whatever reason.