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I always use one of these when fitting solid shaft knobs (snick!) as tightening the grub screw with the knob fully down causes friction as it rubs against the body, but eyeballing a gap then tightening the grub screw can result in the knob ending up slightly lopsided causing friction for part of its travel. Using a card spacer makes it always come out perfect.

'In phase' implies that one needs the phase response of the drivers to be the same. That is pretty much impossible. But it doesn't matter. All that matters is that they're not 180 degrees or close to that apart at or near the crossover frequency, and as such a simple polarity reversal of one driver is the usual fix. As for crossover design, that used to be a seat of the pants job. You'd start with a calculated component value, but to get it perfect required repeated component swapping and testing to dial in the final result. That hasn't been the case for quite some time, thanks to software like XSim, which unlike traditional calculations doesn't rely on the nominal impedance of the drivers for the calculation but instead uses the full frequency response (FRD) and impedance sweep (ZMA) plots to get an exact result. The only issue with that is finding FRD and ZMA files for the drivers, which are only gradually finding their way onto manufacturer driver data sheets, though you can measure those yourself with the necessary gear. Crossover modeling software is to crossovers as speaker modeling software is to speakers.

Genius 😂

I think I've been fairly lucky with my '25 gigs and had almost forgotten the common reality of being in an originals band; putting in a lot of time, effort and distance only to end up playing to a very select crowd rattling around in quite a big room. Well, 'Mad Friday' was spent 70 miles away doing just that. We were very much reliant on the two home bands bringing a home crowd, but possibly due to the time of year, specific day, general level of circulating illnesses, £7adv/£10door ticket price etc. it just didn't happen. We nipped into another pub on the same stretch of road and that was dead as well, so it wasn't like everyone was just camping out next door. Ho-hum. I've injured my back so the whole thing was a literal pain, but it was fun to slim back the gear to an absolute minimum and see (with a provided house cab) what I could get away with. In the end, it all went in two Mono Vertigos and one Tick bag. Ear protection worked better for being a size larger in the new material they've started making Doc Pro's out of. Footwear was a pair of the wonderfully named Skechers 'Wascana Benen' tac boots. They're refusing to break in and are absolutely eating me alive. RB Vampyre 5 (Streamer LX 5 on the K&M Heli 2 this time) -> Joyo 5GHz bugs -> T21 FlyRig v2 {DI -> PA} -> TC BAM200 -> Hartke 4x10 Have to hand it to the TC BAM - it's a great little amp and I'm just glad that I didn't let my dislike of the TE Elf stop me giving it a try.

Rat Charles

Welcome! 40 songs is a great achievement in just a couple of years! Too many basses? Not possible!

Basses are tools. Buy the bass that makes you happy. Play the bass that fits the gig.

... + unlined 🤣

Graphs look pretty similar to me. But I take your point. Like I say. Will rarely be a stack anyway.

It could still do some screwy things even without stressing the amp. At the frequency where one speaker has an impedance peak, the signal voltage across the other speaker will drop so that it has very little output, which has got to sound weird.

Pretty much my take, except that I've paid from £900 to £1,650 for a gigging bass. I recently was looking for a new bass with a budget of £3k, but ended up getting something that did everything that I needed for half that amount.

I used to use a china white pencil but eventually realised I needed the dots so I installed proper white plastic mini-dots.

The phase at 2kHz (and elsewhere) isn't a phase reversal: it's how the phase is represented when it passes 180 degrees. To see what's actually happening with the phase, you need to compensate for time of flight. Right-click on the phase curve and select Estimate IR Delay (on the latest version of REW) - or press Ctrl+Alt+E. Then have another look at the phase graph. Also, the dip at 2kHz is not typical of a phase reversal dip - unless you're using smoothing, of course, which would tend to fill in the dip.

If I take the lowest ohm value stated and put them all in the calc. I appear to be 6 ohm. Which is still in the safe area for the amp. You'll all probably correct me now but that's fine. Still reading and learning.