Bill Fitzmaurice

1 hour ago, Hellzero said:

Calling @Bill Fitzmaurice.

I can't help, it's not familiar. 

The values of the resistors don't matter, you don't want to use them. As mentioned a crossover splits the frequencies to highs and lows. That capacitor isn't a crossover, it's a high pass filter, a very poor one at that. TBH I wouldn't bother with the tweeter, unless for some reason you feel the need for it. A fifteen doesn't reach high enough to be used with a tweeter of that sort. If you want improved upper midrange/lower high frequency response and dispersion a sealed back 6.5 inch will work far better...with a real crossover, of course. You can find full specs on the woofer here. The page is in French, but that doesn't affect the T/S parameter abbreviations. https://petoindominique.fr/php/mysql_thiele_seul.php?hp=5054

By and large a pair of 100mm ports would be good with a pair of tens, but port velocity goes up as driver excursion goes up, so you need a lot more area with 8mm xmax drivers than you do with 4mm xmax drivers. I model the box at the voltage that reaches xmax within the speaker passband and adjust the port dimensions as required to keep velocity no more than 20m/s. I never use pre-made ports anyway. Some recommend no more than 17m/s, but it's not like you're constantly hitting xmax. If you are you've got the wrong speaker/drivers. 

The number of ports doesn't matter, only the total area. I routinely use four corner ports, as they also brace the top, bottom, baffle and sides. That said 100l is huge for two tens. Two twelves would be more appropriate. 

This was common in the days before 3 wire mains cables were used, which insure that all devices are properly grounded. But it usually presented a problem only if one was holding a guitar and touching the mic. Just holding a mic should never present a problem. Even if the mic body is receiving current she would have to be a path to ground to feel anything. Have you had someone else hold the mic to see if they feel it? 

With regard to modeling software it only predicts response within the region of pure pistonic response, which is roughly to two octaves above the driver Fs. To see what happens above that use the SPL chart on the driver data sheet, which is not influenced by the cabinet. I can't comment on the Eminence software, as I've never used it. For direct radiating speakers I use WinISD 0.7. 

1 hour ago, Dan Dare said:

 Behringer owns Midas, which gives it access to some excellent mixer designs and explains why their stuff is decent.

Behringer has of course acquired many brands, giving it legal access to many designs. Go back to the 1990s and they blatantly copied other companies gear, like Mackie and Roland, without the benefit of owning those companies. They're still at it, the Klon Centaur pedal being one example. Not that plagiarism in the gear business is unusual. Jim Marshall copied Fender circuits, and there are innumerable clones of Strats, Les Pauls, P Basses and J Basses. Behringer was a bit different, as at one time it seemed that everything they made was a copy. 

Only with valve power stage. SS outputs have a minimum load, but no maximum. Valves have a maximum load, but no minimum. Many valve amps incorporate a switched output jack that will short circuit the output when nothing is plugged in, to prevent damage in that event. 

Make the internal volume and port area and length the same as the original box. Wire the drivers series/parallel, use whatever type jack is on your other cab. 

SS amps don't need a load, valves do. 

7 hours ago, Supernaut said:

Nothing wrong with Behringer. Their customer service is excellent from my experience. 

Behringer has good designs, if not original, so for the most part they work well. But they keep the cost down by using cheap hardware.

BTW, all the pots on your amp and bass should be cleaned once in a while. Otherwise dust inside can scratch the resistive track and once you do that replacement is the only option. 

It needs cleaning, with this or the equivalent. https://www.crcindustries.com/qd-electronic-cleaner/

16 minutes ago, agedhorse said:

As a bass guitar driver, it’s very limited. Some of this can be overcome by using multiples of this driver (410 and 810 for example)

+1. The original SVT had drivers with 1mm xmax. That's why it took sixteen of them to handle the SVT head. You can find ads from 1969 showing the SVT head with two SVT 810 cabs. As driver technology improved the need for that many drivers lessened. Today you can find tens that are the equal of eight of the original SVT drivers. 

Without specs you can't model the result to compare them. However, at 1.8mm xmax the Delta 10B (B stands for 16 ohm) was not a bass driver. It was intended for PA tops that weren't run much below 100 Hz. 

Being closer to the floor doesn't attenuate highs, it just makes them harder to hear, being more directional than low frequencies. You get the best results with the cab aimed at your head. 

By and large 50Hz tuning will give the best results with the average driver. Premium drivers may work better with 40-45 Hz tuning, but these aren't premium. 

The main issue with the Beta 10 isn't tone, it's the paltry 3mm xmax. That limits it mechanically to 30 watts or so. That wasn't so bad when it came out some 30 years ago, but it's not up to today's standards. This also could have been built on the BP102 motor, where xmax is a far better 6.2mm. No way of knowing, really, unless you have a friend with a Klippel analyzer. 

Eminence generally will not give out specs on OEM drivers. Chances are that's a 16 ohm version of the Beta 10. Measuring them yourself isn't difficult, but you need the necessary gear. 

-3 to -6dB is a reasonable target, but the only way to know if you're hitting that target is if your console has individual channel level meters. 

That G-K seems a reasonable option, especially as the enclosure isn't ridiculously small. One can't get decent lows from a tiny box for the same reason that basses don't have a 45cm scale length.

I wouldn't consider anything with smaller than an eight inch driver. Sure, you could use fives...if there are at least four of them, which pushes the price up, as four fives cost a lot more than one eight. Even an eight is questionable, as manufacturers don't load premium eight inch drivers into inexpensive combos. For what you'd pay for a combo with a premium eight, like a Trace ELF 1x8, you could get a better result with a much less expensive combo loaded with a middle of the road ten. 

Where driving is concerned the Quebecois are only slightly better in following the rules of the road than the Italians. But in the great Commonwealth of Massachusetts one has to fail an IQ test to get a drivers license. 🤪

I've done that since my first desk with that capability, a Yamaha 01v, in 1998. 

Old Peaveys had no trouble with 2 ohms. Back in the days of discreet transistor output stages it was easy to go to 2 ohms, you just used more transistors to increase the current capacity. It's not quite that simple with Class D modules. Sure, they can do it, but it's going to up the cost. However, note that the minimum impedance load tends to be rated at full power. You can run at 2 ohms at 1/4 power and keep the current demand within spec. But who's going to advertise a 2 ohm capable amp at 250 watts compared to 4 ohm capable at 1,000 watts? 😲