Bill Fitzmaurice

Since you asked...🤪 The shape makes a huge difference in how light a cab may be made. Bent panels are much stiffer than flat panels, which allows them to be made from thinner materials. Between bent panels and bracing one can make cabs from 3mm and 6mm plywood, with no ill effect. It's very labor intensive, but well worth the effort if you want the lightest possible cab still using inexpensive materials.

Most of that goes into electric motors for cars, and windmills that provide electric power to charge car batteries. The main reason for high neo pricing is most of it comes from China, which wants to corner the market on electric cars, so they raised the price on neo for export. People have made cabinets out of everything imaginable, including concrete. But heavy materials just aren't practical, and they're not necessary. If you built balsa aircraft models as a kid you already know how to make structures that are very light weight yet very strong.

It's been considered, and used, but aircraft, boat and automobile industries use so much of it that there's not much left over for cottage industries. This keeps the price high as well.

Bamboo laminate is a very good material, but is so much in demand in the building trades that it's hard to find and prohibitively expensive.

1. Carbon fiber is very stiff while also being very light, so it is structural. But there's a lot in the GR advertising that doesn't live up to scrutiny. They're light, yes. But as to the rest...🤥 2. Barefaced braced construction is labor intensive, which adds to the cost. So do their premium drivers. There's nothing wrong with plywood. 3. A conventional plywood enclosure uses 18mm plywood with minimal bracing, if any. Whatever the material is better results come from thinner/lighter materials with extensive bracing. It's more expensive, because of the added labor cost, but you gain the benefit of lighter weight every time you pick it up.

Floor pedals are configured to operate with the low voltage output of pickups. The voltage at the effects loop is much higher, at what's called line level, which is what rack mount processors operate at. Using floor pedals at line level can cause distortion.

I can see them being good with guitar, as guitar cabs need not be very large. But bass cabs do need to be large to go low. As reinforcement for double bass they may be OK.

My assumption with a lead for an amp is it would be the only piece using it and dedicated to it. Which begs the question as to how the OP lost his. Maybe the missus is using it on the coffee pot? 🤥

Another way to look at it is that the lead fuse reveals the current capacity of the wire, which must be equal to or higher than the current draw of the amp. That means you want the lead fuse rating equal to or higher than the amp fuse rating. You can't really go too high, but there's no point in going more than twice the amp fuse rating either. You can feel confident in ignoring the performance claims made by purveyors of leads that resemble fire hoses.

There should be an ampere draw rating on the back of the amp near the mains cord plug socket.

Note that SS and valve amps aren't the same. SS impedance load ratings are minimum, but valve load ratings are maximum. For instance if you have a valve amp with 4 ohm and 2 ohm output taps you'd use 4 ohm with a 2.67 ohm load.

It's not just the amps, it's also the speakers. Ampeg has used Eminence almost as long as Eminence has been around, and Eminence bass drivers have a distinctive rise in the midrange. When emulators are voiced they include the voicing contributed by the speakers.

It could be a suspension separation from the cone, it could also be the voice coil is rubbing.

They're out there. https://www.amazon.com/gp/product/B01LBVWFWC/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Amps and cabs have a built in tone. The purpose of an emulator is to duplicate that tone playing straight through a power amp and FRFR speaker. Playing one through a bass amp and cab isn't what they're made for. OTOH a PA with the EQ set flat is the same as going direct through a power amp and FRFR speaker. If I was to use one I'd send it's output to a power amp and FRFR cab for me to hear and to the PA for the audience to hear.

Compression is good if you don't overdo it. The idea is to reduce high level peaks. Gating is just as useful, to reduce the level of mics not in use, but again you don't want to overdo it.

Because the same settings will sound different in every room. Sometimes you really have to wonder how guys who make money creating sound have no idea how sound works. That's why you take an RTA with your phone. You don't need to guess which frequencies need adjusting or by how much. It's right there for you to see.

You can't adjust EQ from the stage, you have to do it listening or measuring, preferably measuring, out front during sound check.

You might want to consider retiring those cabs. A Barefaced 212 has the same output capability as that of a 3620.

First off, chaining them in series would be 16 ohms. When amps have two outputs they're almost always wired parallel. That's how you get a 4 ohm load from two 8 ohm cabs.

The brand doesn't matter, the specs do. In this case that driver works best in a 300 liter cab, not 90, while the short 3.4mm xmax is barely adequate for electric bass.

You can have a ratio of a ten watts amp to one watt cab and they'll be fine, just don't turn the amp up past the point where the speaker distorts.

The Jensen is not very good. Response is boomy, while it's mechanically limited to 150w.

You only need to calibrate it if you want an SPL reading, which you don't need for seeing the system response.

Did I fail to mention you need separate EQs for monitors and mains? 🫢 EQ adjusts the response to suit the room. However, the room consists of two separate entities, on the stage and in the audience. On the stage you're trying to get maximum intelligibility without feedback, in the audience you're trying to get the best overall sound quality. Seldom the twain do meet.