Bill Fitzmaurice

And as noted the impedance of the 1/4" output is ten times what it should be. Combine that with the lack of an XLR input on the power amp and what you have is two non-standard devices that doomed any attempt at using them together.

Quite right. I didn't notice that the only way the Sadowsky pre can deliver the required low impedance output is with the XLR output, while the Sumo doesn't have an XLR input, a curious omission. For that matter the high impedance of the Sadowsky 1/4" output is very unusual.

Don't make more of it than you should. All attenuation does is to turn down the tweeter. If a user can't figure that out they should stick to acoustic instruments. 😉

☺️

Because the average horn loaded high frequency driver has 10dB higher sensitivity than the average woofer attenuation by one means or another is a necessity. It can be with a variable LPad, or with a fixed value LPad, or with DSP. Yes, the bass and preamp can reduce the treble, but their frequency passbands don't necessarily line up with that of the tweeter. Besides, there's nothing wrong with tweeter attenuation, we've been doing it for a hundred years, so why not?

You won't get a good guitar tone from a bass cab, at least not if you plan to overdrive it. It's tough to beat a Celestion Greenback.

The key word is 'top'. They're made to be used along with a subwoofer. Some are capable enough to replace a bass speaker, but by no means all, and short of trying them you have no way of knowing.

Considering the target audience I'd say the ad is spot on. I'm 75 but I haven't forgotten what got me started doing this when I was 15, and it wasn't trying to impress my parents.

True. Just like a box of chocolates when you mix drivers you never know what you're going to get.

If that's too crude you're too old. 😲

The difference between tens and twelves is slight. Just having the combo up on top of the extension will make the high end more obvious. For that matter putting it on a stand would.

Assuming the Silverado Special is a 2x12 I'd get a 4 ohm 2x12 extension.

That's a hi-fi speaker. The main drawback is it has lower sensitivity than a pro-sound speaker, so it won't go as loud with the same amp.

Tell that to Derek Smalls. ☺️

Pedals are made to go into bass amps. Rack mount pre-amps are made to go into power amps. I'm sure there are exceptions, but the only way to know if any combination is to make sure that the output voltage of the pedal is at least equal to the required voltage to drive the power amp to full output. Unfortunately neither your SPB-1 nor your GSS provide those specs. The impedances aren't the problem, it's the output voltage of the pedal and the input voltage sensitivity of the power amp.