Bill Fitzmaurice

If there's only a capacitor it's safe to just disconnect the tweeter. If there's a coil as well it's not.

He did. There are lots of explanations why, none that I've seen from Keith himself. The most obvious reason would be because he wrote the songs, knew what he wanted, and the bass tracks were laid down early in the session.

Neo is more expensive than ceramic, but the main reason neo drivers cost more is that most have cast frames, which are more expensive than stamped steel, and nearly all are performance upgrades compared to ceramic OEM drivers.

The sound of the records through at least 1970 was likely a mic'd amp. Even after that when it was probably direct the mix on the records was bass shy, because the average consumer playback systems of the day couldn't handle much below 80Hz. Modern re-mastered mixes sound completely different, and not just with the bass. The re-mix of 'Satisfaction' is dominated by piano, which for the first 40 or so years after its release I never heard at all.

And it's fantasy. Even the Grateful Dead Wall of Sound couldn't produce 6Hz at 130dB. Makes for good reading, though.

The SVT debut was the 1969 Stones US tour. Bill, Keith and Mick Taylor all used them, because their UK spec Fenders were all burned out in rehearsal in Los Angeles by a dodgy power conversion. There were five prototype SVTs at Ampeg in LA, which ended up as the Stones backline for the tour. Why they didn't just get replacement Fenders from down the road in Fullerton isn't known. Likely it was another of many cockups by the new owners of Fender, CBS.

Not in this century. But do so in Times Square in New York City and no one would notice.

If you're walking through the 'hood you'd best be wearing a hood. Wear a bonnet and you'll get rolled, and not the way a car rolls.

That we can agree on. Now, about a car trunk. It got that name because they originally looked like this: How do you get 'boot' from that? 🙄

Using different cabs works very well when each operates within its own frequency bandwidth. That's what PA systems do. Bass cabs don't do that. For every frequency where different cabs are augmenting each other there's another where they'll be fighting each other. With identical cabs they're always augmenting each other.

Mixing cabs seldom works anywhere near as well as using identical cabs. That's not to say that any two cabs together won't usually work better than either alone, because they will. But what you're proposing is more like having summer tires on one side of your car and winter on the other, so you're ready for any condition. The reality is that it won't work well in either summer or winter. Find a cab that you like. If one isn't loud enough get another. If what you have doesn't work for you try something else.

Garter belt. They look much better on these lassies: https://www.fredericks.com/lingerie/sexy-gartered-lingerie?offset=0&limit=56

Class A valve amps can do double duty as portable room heaters. They're that inefficient. But as to the OPs question the vast majority of the power consumption is linear with respect to output, so if you're running ten watts out of a ten watt amp or ten watts out of a 1kW amp the power meter will be spinning at pretty much the same rate.

Yes, but when you have just one brace connect the middle of two opposing panels their stiffness becomes the same as if you'd doubled their thickness. With more braces one can make a cab out of 12mm that's stiffer than one made of even 24mm plywood that's not braced.

Or building commercial cabs. Most use 18mm, because it's less expensive to build a minimally braced, or even unbraced, cab from 18mm than it is to build a well braced cab from 12mm due to the higher labor cost of bracing.

The OBC 212 by all reports sounds good, and it's small. However, the downside to the isobaric configuration is that it has the same output as one twelve in a standard ported cab. It also weighs a lot more than most 112s.

By and large the Alpha is better in a sealed cab, the Beta better in a ported cab, but it also depends on the cab particulars.

Alignments are obsolete. Back in the Dark Ages before the PC, when speakers were designed with slide rules and scientific calculators, alignments were devised, to reduce the innumerable possible permutations to just a few, for the sake of simplicity. WinISD still has them listed in the initial calculation stages as starting point, but once you've got to the results page you can change the box volume and tuning frequency at will and it will recalculate the result, with each recalculation being a new alignment. This gives you the ability to try all of those innumerable possible permutations. With slide rule or scientific calculator that was impractical, as each new calculation could take fifteen to thirty minutes to do the calc, and then another thirty minutes to manually chart the result. With a PC and modeling software it's very practical, with each new calculation and chart taking no more than fifteen to thirty seconds, unless you decide to overlay the charts for each new calculation. Then it can take maybe a minute or two for each additional.

If the port is too short it will make for a boomier tone, if too long you lose midbass sensitivity. You should use speaker modeling software to determine the correct length.

It's strange. I've only come across one driver, the Dayton RSS 390-HF-4 subwoofer, that has a rear gasket but not a front gasket. Of course the cab that I specify it in is a horn, so a gasket has to be added. 🙄

The gasket on the front is so you can rear mount them, though that's seldom done today other than in horn loaded cabs. They should have a gasket on the rear of the flange as well, 'tis puzzlement why they all don't. They can be sourced.

You may use 18mm in just about any cabinet. The reason most well designed cabs don't use it is that with adequate bracing 12mm is sufficient with less weight.

Varying the size of a sealed cab by a moderate amount has little effect on the result.

That sound is 95% technique, 5% gear. Bootsy Collins was one of the first, and is still one of the best funk players. Bootsy could play a washtub bass and it would still sound like Bootsy.

My preference is blowing out. Blowing in can result in dust accumulation on the heatsink, reducing its effectiveness over time. I've seen fans with filters to prevent dust from ending up inside, on computers, but not on amps. They're not a panacea either, you have to periodically clean the filters. Pro-sound rack mount power amps can be either in or out flowing, with the fans on either the front or back. With those I've seen occasions where an out flow from one amp can get pulled into the in flow of another amp, leading to a very uncool result.