alexclaber

[quote name='Monckyman' post='1199283' date='Apr 14 2011, 12:28 PM']Amps trying to punch above their weight produce square waves (clipping) and your driver won`t like that.[/quote] No, they won't give a damn. Read the link I posted earlier. If clipping was so bad how would we amplify guitars and synths without forever blowing drivers?

[quote name='ThomBassmonkey' post='1199250' date='Apr 14 2011, 11:59 AM']If you run a 500w amp at half*, is it only putting out 250w of power? Or does it not work like that? * assuming everything's (hypothetically) running 100% efficient, perfectly flat response over the whole volume range and there's an even volume increase so 5 on the volume dial is actually exactly 50% of the output from 10 on the dial.[/quote] No, absolutely not. It will be putting out 250W only at the moment when the voltage hitting the amp (which depends on how hard you're hitting the strings, how loud your pickups are, any gain your onboard preamp is adding, any gain FX are adding), multiplied by the gain applied by the amp (which depends on gain, EQ and volume knobs), then squared and divided by the speaker impedance equals 250W. Pluck a bit harder or a bit softer and the same point in the note could be putting out 500W or 125W. Pluck a lot harder or softer (like twice or half as loud) and your amp could be clipping hard as it tries to produce 2500W (thus you get 500W for a longer portion of the note) or producing just 25W. And I bet in the course of any gig you play with a dynamic range of more than just going up and down fourfold (20dB).

Read this: [url="http://barefacedbass.com/technical-information/mythbusters1.htm"]Amp mythbusting![/url] The Wizzy cabs have very low excursion limited power handling so you'll hear the increasing distortion (with clean sounds) well before thermal failure occurs. The risk from slap is causing such high excursion that the speaker doesn't just distort but completely runs out of travel, thus creasing the cone, buckling the voice coil or damaging the suspension. I think that's fairly unlikely to happen with that woofer but to be sure see if EA can tell you the ratio of Xlim to Xmax.

[quote name='Musicman20' post='1198230' date='Apr 13 2011, 02:51 PM']Remember, this is acoustic. I am going to try the TC RS210, but from previous experience it is very loud for a small cab![/quote] Does your amp have one of those new fangled volume knobs? If not then you could try plucking softer.

[quote name='andy67' post='1195098' date='Apr 10 2011, 09:39 PM']Ohh, ow, ouch!! You have just broken the rule of sound... A good set of speakers will only show up a poor amp for what it is! It is best to balance out a rig by buying the components as close in price as possible.[/quote] The problem with this 'rule' is that there isn't a consistent correlation between price and performance - and the big discrepancy is that the performance:price ratio of electronics has hugely improved over the years (barring valve stuff where limited production, expensive parts like valves and transformers, and older designs and production techniques keep the prices high) whilst the cost of producing electro-mechanical devices like loudspeakers or building and finishing cabinets hasn't come down much.

I scoped the Shuttle 6.0 a while back and there is a nicely positioned steep highpass filter. I gather the knee point for that filter is a bit higher for the 3.0 and a bit lower for the 9.0 - however if you saw how high up the vast majority of bass cabs roll off then you'd stop thinking about it. It's just there to get the best out of the likely cabs it'll be used with. Most bass amps have a roll off somewhere in the lows to make life easier on the power stage and easier on the speakers. One notable one that doesn't is the venerable SM400 - which resulted in its reputation for not being as loud as you'd hope, due to wasting power trying to make noise where the cab really couldn't. Having used my passive bass (active basses often have highpass filtering in the preamp), through my DC coupled Class A U5 (preamps often have highpass filtering too), through my QSC PLX 3002 with the filters switched off, I was astounded at quite how much the woofer jumped around in the Compact at high SPL. Engaged the 30Hz filter and the tone didn't change one whit but the woofer movement was vastly reduced (so you could push it harder before it starts compressing/distorting). Engaged the 50Hz filter and the tone tightened up very slightly and the woofer looked like it was hardly moving (the movement would have been much more obvious without the grill in the way).

[quote name='MatthewKeys' post='1192408' date='Apr 7 2011, 11:17 PM']1. Takes a while for the sound the come out after turning it on[/quote] That's usually normal - it takes a while for amps to charge their power supply capacitors. [quote name='MatthewKeys' post='1192408' date='Apr 7 2011, 11:17 PM']2. Sounds like a character in a computer game is dying whenever I turn off my amp? If you don't get what I mean I will try to video it soon..[/quote] Likewise, that's usually normal - I think it's the sound of some of the caps discharging. Any amps that don't have extra circuitry to stop this happening will make interesting noises when you switch them off. [quote name='MatthewKeys' post='1192408' date='Apr 7 2011, 11:17 PM']3. Not very loud, I practice it at Gain half way, Master halfway with a passive bass[/quote] Turn it up more, that's what the knobs are for. If it starts distorting, sounding squished or gets more midrangey and the bottom more thin, then you're running out of output. [quote name='MatthewKeys' post='1192408' date='Apr 7 2011, 11:17 PM']I bought a new tweeter for my 410HLF cabinet and it arrived today, I bought it because my old tweeter was having no/little effect on the high end, all it really did was add an extra bit of hiss and I was told by the people at loud technologies that it's most likely I had blown my tweeter. Apparently not, the new tweeter is having exactly the same problem! I have made sure I connected it the right way round. I took off the back of the amp and made sure everything was plugged in and intact, which it was..so I really don't know what is going on.[/quote] If you're not using fairly fresh strings and your amp is quite mellow sounding (as the SVT3 is) then you might not hear much through a tweeter. If you're hearing hiss from a tweeter then I'd be very surprised if it's blown - if it's hissing then it's working. Plug an iPod or suchlike into your amp and play music through the rig. The cymbals will come mostly through the tweeter so you'll be able to hear clearly if it's working or not. Turn the tweeter knob up and down and listen to how the sound changes. The 410HLF has quite a large dip in the upper midrange and treble between where the woofers roll off and the tweeter kicks in, and that may be the sonic region where you're noticing the lack of treble, not where the tweeter has output.

[quote name='Merton' post='1190747' date='Apr 6 2011, 05:54 PM']Is the fact that Eminence is involved going to screw Barefaced as well? [/quote] It's not just Eminence, it's anyone and everyone that uses neodymium - neo loudspeakers, electric motors, generators, etc. The result for us is that prices are going up and may continue to go up. If the cost of neo goes stupid high then we'll look into comparable quality ferrite drivers, which would make the cabs heavier but still as light as most other neo cabs are now.

I would say it's mostly down to how the player approaches things but that at high SPL many rigs can't play clean enough to allow it through unsullied.

The cost of the raw neodymium in our drivers has gone from about £5 to £50 per woofer, in the last year.

Google neodymium prices. The price has gone through the roof! We don't intend to stop using neo speakers if it's reasonably possible but they will be getting more expensive and the price volatility and limited supply is causing a lot of stress and hassle for everyone in the industry.

If you do divide it, do so vertically, and make the bass half as big as possible.

[quote name='lojo' post='1185026' date='Apr 1 2011, 05:38 PM']BTW, do you still have the barefaced cabs doing the rounds, Id be keen to try one with my new terror, I think I am going to pass on my TC cabs and go for a 1 cab solution[/quote] No, although there may be a Midget T still going out if time allows...

[quote name='lojo' post='1184984' date='Apr 1 2011, 04:52 PM']If the wiring in a Amp from the first connector to the 2nd is effectively daisy chaining what is the difference, or is it to do with the length of the cables?[/quote] I noticed that if you only have one speakon socket on a cab then people who are planning to use it with another cab ask why and at that point you then know they're planning to use it with another cab. As our cabs can handle far more power than most then it's rather a waste to add a second non-Barefaced cab when you could just throw more power at the Barefaced cab, because once you've got a second less potent cab in parallel then you're restricting how hard you can push the Barefaced. Plus, adding a second cab that isn't designed to work together can cause rather random performance.

[quote name='JTUK' post='1184950' date='Apr 1 2011, 04:13 PM']...I can't go on these stages with a weedy 12" or two, I'm afraid.[/quote] I quite agree, if I'm using a 12" or two I'm careful to only use ones that are suitably badass!

[quote name='Count Bassy' post='1184783' date='Apr 1 2011, 02:32 PM']I can sort of understand the space problem on the RH450, but why on earth would speaker manufacturers not fit two sockets as standard, Total extra cost would (I'm guessing) be less than a tenner.[/quote] We chose not to discourage daisychaining unsuitable cabs with ours. We can't stop bad practices but at least we can make it more difficult!

[quote name='patch006' post='1184299' date='Apr 1 2011, 09:36 AM']Its all your fault Alex, with only one blooming speakon input on my barefaced compact!! [/quote] Well we do offer optional second speakon inputs when people order second cabs! I should point out that we were selling cabs before TC and EA launched heads with single speakon outs, so I totally blame them. Electrically a Y-cable will work perfectly, and it'll probably reduce the chance of other people liberating your speaker lead. What cab are you using with the Compact? I hope it can keep up!

You can turn two speakon cables into one Y speakon in about 10 minutes, armed with only a screwdriver.

The ratings are only nominal, just a guideline to help with amp matching. The actual impedance varies hugely across the frequency spectrum. Nominal impedance ratings are inaccurate by definition.

[quote name='waynepunkdude' post='1176994' date='Mar 26 2011, 11:28 AM']Do you still make the Vintage?[/quote] No, it's been replaced by the Super Fifteen. But you'll only need bigger than the Super Twelve if you have to use both of 4x10"s for your gigs, it's damned loud!

Transmission line cabs might look like a variant on a ported cab but they're a totally different animal! The only acoustic upside to front ports is that you feel the thump of air movement more than with a rear port if you're standing very close to your rig. Move further away and the performance will be no different for a given woofer(s), enclosure size and port tuning and area (assuming suitable damping).

As long as the port is within 1/4 wavelength of the woofers then the output will be in phase. [url="http://www.mcsquared.com/wavelength.htm"]http://www.mcsquared.com/wavelength.htm[/url] 100Hz 1/4 wavelength is 2'10" - and a correctly tuned port will have hardly any output that high up, most output happening an octave lower (so 1/4 wavelength 5'8").

The problem with selling an amp that is rated down to 2 ohms is that you'll sell fewer to people with 8 and 4 ohm cabs because so many are convinced that they need to get full power from their amp. Marketing psychology!

My guess is that it has good protection circuitry and they've proven that you can't damage it driving three of their cabs. Lots of amps will run loads below their rated minimum without a problem. I'd be surprised if it has issues driving any other three 8 ohm nominal cabs, but conveniently for their sales they're not guaranteeing it for anything but their own cabs. I'd be astounded if there's anything clever going on with internal circuitry in the cabs, especially having poked around in them.