BassmanPaul

I would first check the ground soldered lug on the volume or gain pots.

A point to remember is that if you want your speakers to be twice as loud you would have to apply ten times the power to them. That is if they can handle that of course!

It's hard to find good help!!

It seems more like a toy rather than a usable amplifier for bass.

I can only imagine how heavy your bass is. I bought a fretless Carvin LB76WP in Walnut and while the bass played a treat at the end of the evening I was knackered from it's weight. For a little guy like me it was just too much. I recently gave it to a bass playing nephew along with a Carvin BX1500. He is delighted with both. All that said the bass is beautiful and you should be proud. Never having played a fretless before I had Carvin install fret lines. The thought of that massive expanse of Ebony scared me. I hardly look at the neck any more when I play. LOL

I'd keep the Genzler.

Then basically the 2x10 will be holding the 4x10 back.

Just as a thought, what are the impedances of the two cabinets? For equal power sharing the two 10 has to be twice the impedance of the four 10.

For me, if you took apart a combo amp that you had borrowed from me I'd be more than a little peeved!!

A few seconds without a load is not going to cause too much of a problem. For the record a short circuit across the output jacks is fine for a tube amp. Some manufactures short the output if a speaker cable is not plugged in.

Careful @Rich- you don't want to mangle your Wurzels! Over here they're known as Rutabagas. LOL

In the late Sixties I bought a Leak TL50 Plus. A mono power amp with 50W output from a pair of Cathode biased KT88s. I paid five quid for it. I built a single tube pre-amp, basically the normal channel of a Fender Bassman, to plug into the pre-amp socket on the Leak. It worked really well.

The cabinet had to be rewired to suit the 4Ω output impedance of the Bassman head.

I've owned two Bassman 50 heads. One was horrible into it's matching 2x12 cabinet. It lasted a weekend before I returned it. The second worked fairly well into a Marshall 4x12 but the cabinet had to be rewired to make it 4Ω.

@stereoplayer Those tray stands are great. We used to have a few. One each side if the stage holding up an Altec A7 with a massive Altec horn atop each. We never had a problem being heard! LOL

I tried running Stereo back in the early Eighties. For me it didn't work that well.

If you stack the Mark Bass cabs on top of each other you'll have better dispersion out in the room.

He hasn't been back since his first post!

Is the 1/15 a Backline GK?

Where the Deer and the Antelope play.

To work properly with an 8Ω 4x10 the 2x10 would need to be 16Ω for equal power sharing. That gives you a load of 5.3Ω. Both cabs would also need to work with the same polarity otherwise they will fight each other all night long. That said they still might not suit each other tonally.

I think not! Your cabinet seems to have had a driver change. Were the B&C drivers modelled to make sure that your cabinet was an appropriate fit for them?

There is no such word as ohmage unless it has an H in front of it! The correct word is Impedance. Never connect both outputs on an amplifier to the same speaker cabinet. Many amplifiers use two output modules that run in Bridge mode to produce more power than the single channel can provide. In Bridge, each channel is driven by. the same signal BUT with opposite polarity. Connecting them together will destroy both output modules.

@agedhorse Let's page the man himself.

Six EL34s would be correct.