Bill Fitzmaurice

[quote name='chris_b' timestamp='1464445385' post='3059519'] Running an amp at 4 ohms does not make it less reliable than running it at 8 ohms!! [/quote]True. OTOH going to a 4 ohm driver "to get all of the watts out of my amp" will at best result in a few dB of additional output, and depending on the driver specs it could actually have less output. This is of course totally predictable, using speaker response modeling software, but as the OP decided to leap before looking I give it a 50-50 shot that we'll see a 600w 4 ohm driver appearing in the classifieds in short order.

[quote name='ricksterphil' timestamp='1464388430' post='3059209'] I have a Genz Benz 500 1x15 running at 8ohms 300w. By adding an extra speaker cab it will run at 4ohm and 500w[/quote]Only if the second speaker is 8 ohms. [quote]I want to upgrade the standard speaker with a 600w 4 ohm job[/quote]Going to a higher thermal power rating doesn't mean it's an upgrade. It's far more complicated than that.

[quote name='spongebob' timestamp='1463256277' post='3050032'] Trouble is, car space... [/quote]Get a larger car. Bass players and tiny rides don't mix. Just be thankful you don't play drums.

[quote name='casapete' timestamp='1463270111' post='3050126'] ever noticed that an awful lot of pro players with road crew still favour heavy valve/ big cab rigs? [/quote]Ever seen them haul their own gear?

[quote name='Kex' timestamp='1463212601' post='3049512']Go and try and lift up a professional full range B&W studio monitor, or even a high end home hifi, its massively heavy and there is a reason for that. [/quote]There is, that being that heavy minimally braced or unbraced construction is much less expensive than well braced lightweight construction. If the speaker isn't going to be moved from place to place on a weekly, or even daily, basis then weight isn't an issue. It may not be if you're young and dumb with more muscle mass than grey matter. But as you get older most of us realize that schlepping less weight is its own reward.

[quote name='Merton' timestamp='1463078791' post='3048436'] There's a thread on here elsewhere; the array cabs have a passing resemblance to BFM cabs IMO [/quote]Only passing, as the woofers aren't horn loaded. But at least they got the placement of the midranges correct.

[quote name='discreet' timestamp='1461490742' post='3034999'] Is anyone actually reading the specs and info on the 410? It[i] looks [/i]exactly like every other 410 (if a little smaller and lighter), but that's where the similarity ends. [/quote]+1. There's a right way and a wrong way to make a 4x10, 6x10 or 8x10. Alex does it the right way. AFAIK at this point he's the only one who does. Personally I'd rather the superior dispersion characteristics of a vertically stacked pair of 2x10. But if the particular form factor of a 4x10 is what you want then it's the only 4x10 worth considering IMO.

[quote name='Musicman20' timestamp='1462281688' post='3041704'] it would be replacing a fairly big rig [/quote]Big, but the drivers used in those Orange cabs are marginal in what matters, which is excursion/displacement. I'd venture that a Barefaced Super Twin would have much more output than your old stack.

[quote name='grandad' timestamp='1461621353' post='3036286'] A 4ohm cab will draw twice the power from the amp as an 8 ohm cab. The loudness will be noticable but not twice as loud. [/quote]Yes, and no. With the same amp settings the 4 ohm cab will be 3dB louder, which is noticeable, but not significant. But at the full power capacity of the cab they'll have the same output. There's really no advantage to a 4 ohm cab unless your amp is rated at less than half what the cab is.

The first SS amps were quite horrid, especially where noise is concerned.

[quote name='JTUK' timestamp='1461500232' post='3035143'] Also, pubs are too much work for the money anyway, IMO, so there is a limit to what you want to rig and another mouth to feed. If you have a load in and out or around an hour each, including set-up/break-down, of course, you will not be able to charge for it. Diminishing returns etc and I don't think a small P.A/gig needs mixing beyond the band anyway.. If you can't hear someone in the band...there is something pretty wrong IMO, and for pubs, it is that simple and basic. [/quote]Common arguments, but IMO they don't hold water. If you're taking pub gigs to get rich you should consider a different profession. As in any line of work entry level positions are a means to an end, not the end itself. If you want to get better gigs then you have to sound better, and if you want to sound better that means doing whatever you can to differentiate your band from the rest. That means good PA, and someone to run it. Even if he's not George Martin he will still give you something that no one on the stage can: a set of ears in the audience.

[quote name='JTUK' timestamp='1461252136' post='3032924'] Equal share of what tho? Pub money will be from £50... no decent engr is going to work for that... [/quote]One could make the argument that no decent musician would either. Engineers are just like any other artist. You do it because you love it. If you do manage a living at it all the better.

[quote name='JTUK' timestamp='1461233460' post='3032644'] A decent engr isn't going to work for pub money. So if you get anyone to do it, you'll have to educate and teach him. [/quote]For many years the bands I was in had an engineer, taught by me, who received an equal share.

[quote name='EBS_freak' timestamp='1383566266' post='2265856'] I stand by what the rest of the thread is hinting towards, the Bose will not cut it with a loud band... and having been there, you won't convince me any other way! [/quote]+1. A friend of mine is a keyboard/vocal single act who has an L1. It's fine for what he does in the small clubs he works in. When he sits in with my band he still uses the L1, but only for his keyboards as a backline rig. Just for the heck of it he once tried to run his vocals through it, rather than my PA. It really was like bringing a knife to a gunfight, and a small pocket knife at that.

[quote name='hubrad' timestamp='1460710459' post='3028004'] Still, with say 2 x 250W speakers in series, you'd not hit the front one with 500W, would you? [/quote]You would not. Half the voltage would be dropped in each, therefore half the power would be dropped in each. [quote]And with the same in parallel they'd get an equal share of the power? (again, simplistic approach..) [/quote]Yes, because half the current would be dropped in each.

[quote name='Ant' timestamp='1460666595' post='3027798'] thanks guys! and would i just simply cut it out and stick it (staple or adhesive i imagine?) to the inside walls and back? [/quote]+1.

[quote name='taunton-hobbit' timestamp='1460661201' post='3027742'] If you can get hold of some old-fashioned carpet felt, you can't go wrong..... [/quote]That will do, as will 5mm polyester upholstery batting or 5mm open cell foam. It will tighten the mids quite a bit by eliminating internal reflections.

Those are 8 ohm Eminence Beta 12s, with a thermal rating of 250w. In that small sealed cab their real world power handling before farting out is more like 125w each, and being sealed there's not going to be much happening below 70Hz. It really should be lined with damping material as well. [quote]Power handling is double that of one speaker, as a series pair can only handle the single amount whereas a parallel pair will split it between them.[/quote]You're confusing what happens with power versus what happens with voltage. On that matter with parallel connections each driver sees the same voltage, with series the voltage is split amongst each driver.

We are visually oriented creatures, so looks are paramount, with anything and everything. Years ago when I was in the ski business Nordica introduced a line of ski boots that fit great, but were butt ugly, so even the very few who were convinced to try them on didn't buy them. The following year the exact same boots were reintroduced with a different name, and appealing graphics. It became the #1 best seller, not just within the Nordica line, but of every line.

[quote name='Kevin Dean' timestamp='1460370381' post='3024977'] I was wandering if it was worth using both my Barefaced Super compacts , one behind me & the other out front under the vocal PA ? [/quote]That would result in phase cancellation issues. Low frequency sources should seldom be split. The issue here is why a vocal only PA? Your stage rig should drive the stage, the PA should drive the room. That's the only method by which you can get a result that's good for the audience out front while remaining comfortable for the band on stage.

It depends on the room. Most rooms are very 'wet' in the lows and mids, so reverb would only make things worse. OTOH in a very dry room, like a recording studio, some reverb might be in order. But as one usually adds studio effects in mix-down you still wouldn't want a reverb amp. However, back in the '60s many studio players did use guitar amps with reverb, most notably Carol Kaye. It's most noticeable on the tracks she did for Phil Spector, but you can hear it on Beach Boys tracks as well.

[quote name='Fonkbass' timestamp='1459705603' post='3018786'] i would go for a no tweeter build if the Beyma's give me enough high end.. [/quote]It's not about high end, it's about dispersion. No matter what the on-axis sensitivity no twelve is going to work well off-axis above 2kHz. The BGH25 is rare in that it can be used to 2kHz, so there's no hole in the mids.

The plans should give you a list of a few appropriate drivers, and a range of T/S specs so that you can compare other drivers as well. 'Should', although I have no idea whether they do.

[quote name='Passinwind' timestamp='1459012016' post='3012868'] I should reiterate that "Passinwind Electronics" is still just a vanity name for my hobby builds, not an actual commercial entity at this time. [/quote]Good thing, one would not want bass gear to have a name which implies that it will fart out.

[quote name='Kevin Dean' timestamp='1458987698' post='3012591'] I'm sure my cab became louder ? [/quote]Probably not, at least not by an audible amount. Break in isn't that dramatic.