Mr. Foxen

Noticed last couple of practices that I've been clenching my teeth when playing. Fairly sure I didn't used to do it, would have noticed the jaw ache before. Guessing because I am taking a bit more of a lead role in this project, and generally taking a different position musically (listening to the drums for time and ignoring the guitar, rather than watching the drummer, and listening to the guitar). Anyone else do this, tips for stopping, discuss.

You also don't lose any top compared with a single speaker, not a consideration with a sub, that can use a heavy sub driver, which provides the low extension, at the cost of top. The advantage of isobaric is greater low end extension compared with a single speaker with an equivalent sized enclosure. From the makers point of view the additional advantage is using generic drivers. They are pretty much the antithesis of Claber's designs (based on his own requirements) of light weight, high sensitivity and high max SPL. Basically, his boxes are big but light and loud, these can be small, although heavy and quiet. They would also probably be cheaper if their business model were comparable, since they use two cheap drivers rather than one very expensive one.

[quote name='Silent Fly' post='788450' date='Mar 28 2010, 12:30 PM']* [i]Something else?[/i] In my opinion the best solution is a crossover. The signal is split in low and high frequencies. The two components are processed separately and then recombined. In this way it is possible leave the low frequencies untouched and process only the treble (or vice versa)[/quote] Isn't this basically what the Lomenzo Hyperdrive does? Figure it would be handy to have a pedal like that but with a loop for another drive rather than the meh drive sound of the hyperdrive.

Feedback is awesome. Roll off some treble somewhere along the line to make it not squealy. I'm at work so I can't post a Khanate live video, so go search one on youtube.

[url="http://cgi.ebay.co.uk/Bass-Guitar-Amp-which-I-know-nothing-about_W0QQitemZ330418558012QQcmdZViewItemQQptZUK_Musical_Instruments_Guitars_CV?hash=item4cee7b143c"]Badly listen Westone Spectrum[/url]

[url="http://cgi.ebay.co.uk/Ashdown-ABM500-bass-head_W0QQitemZ110513063271QQcmdZViewItemQQptZUK_MusicalInstr_Amplifiers_RL?hash=item19bb178567"]£160!![/url]

Suppose if someone really wanted one, they'd have trouble finding one. Nice spelling too.

[quote name='stevie' post='788467' date='Mar 28 2010, 12:52 PM']An isobaric speaker doesn't save any space, i.e. it is not any more efficient than a normal direct radiator.[/quote] The bass extension is the space saving, otherwise, you need more air behind the driver for the bass extension, hence using two speakers instead of one saves air volume, smaller cab, same limits as the single speaker in a double sized cab. Edit: I'm seeing it as a 1x12 with bass extension of a 1x12 in a double sized box, rather than a folded up 2x12 that they market it as.

Does that look like its made of loads of pieces of wood?

I'd like to see a side by side with the standard BDDI. Realised my one is missing the boost, guess older model, and could do with that for power amp driving purposes.

[quote name='stevie' post='787666' date='Mar 27 2010, 09:39 AM']For bass guitar, isobaric is a waste of time (and the benefits are marginal at best for hi-fi). The second driver effectively adds weight to the speaker cone, which improves the low-end extension and reduces efficiency.[/quote] Time isn't the issue, its a space one. Power is cheap now, you can get a lot of watts for not much money, but space is always a premium. This design means you get a lot of bottom from a small box, the extra speaker takes up space, but not as much as you'd have to increase the size of the box for the same bottom. I'd guess the point is mostly that you can use two standard speakers, rather than getting a very custom heavy one like Acme use.

Don't get a landmark head, get a Sansamp and a PA power amp, does same stuff (maybe the rack version) and unlimited power. The GS412 can take a kilowatt head, so might as well do it.

Bear in mind there is no need to 'match watts', impedance (ohms) is the important bit.

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[quote name='obbm' post='786036' date='Mar 25 2010, 04:59 PM']Don't you mean "out of an amp into a speaker"? The only power going into an amp is from the AC mains.[/quote] Yes, hurried work typing. Actually, mostly confused by phrasing of question 'power handling on back of amp'. Back of cab = speakers thermal power handling.

There is a 'but' in that the rating is for the amount of power you can be putting into an amp before the voice coil overheats. If could be farting and tearing at a lower power, depending on its excusrion limited power handling, which is specific to frequency, so not as handy to quote.

[quote name='umph' post='785994' date='Mar 25 2010, 04:22 PM']pots shouldn't really ever fail unless you do something stupid. I always used alpha pots and i've never had a problem with one even when i've set them on fire.[/quote] You don't count being on fire as a problem?

[quote name='Prime_BASS' post='785909' date='Mar 25 2010, 03:10 PM']2 half stacks is over kill. I took my two guitr half stacks an a 300w bass combo to a gig in a relatively small theatre and neither of the stacks where abouve 4 on the master volume. And the 2x10 bass combo was only around 4 or 5 on it's volume, plus a drummer. I wouldn't waste your money on gear trying to be heard you may find it won't make a difference. You might want to trying experimenting with room acoustics and where you position your rig on relation to dead spots on stages, corners, curtains an in relationto your drummer and the guitar amps. You should try and suggest playing at level that you can at least shout over. Also the few gigs I've done with monitors I've had to stand at least 10ft away from my amp to hear it. You might want to get them to turn it down on the bass front and try and compensate your tone to increase in mids and low mods to try and cut through the mix I would like to try, what I call a stage stereo effect, especially since you have 2 cabs of the same spec, you should place each cab either side of the drummer. So you would have Guitar-bass-drums-bass-guitar. It's only an idea but hopefully the cabs will have a better spread. I'm no scientist, but you should try every option you have with current gear you have before spending any more money.[/quote] Pretty much fully disagree with all of this post. The right gear will help you cut through, maybe not the amount of money you spend, but the right choice. Don't put a cab either side of the drummer, I've done it with a pair of 8x10s and it cause very obvious comb filtering, no bass in some places, step foward and it it's nuts, was actually kind of useful for my purpose, but not good sound. Plus as they are 4x10s, they'll end up low and you'll miss out on higher frequencies also. Mids and low mids will help cut through as they are 'louder' to the ear, but since that is detuned guitar territory and it is a volume competition, you are picking the wrong battle.

Think there were suggestions on the Acoustic forum, might be a job for WinISD, the 126 port goes quite fart up the back of the cabinet, but I have no idea how to count the flared part at the front, that's something for AlexClaber of BFM to chip in on. I'd guess you'd measure the bit up the back of the cab as the port, and ignore the flare, or maybe do it both ways, and see which gives you a sensible looking tuning.

I'd guess the stupid amount of power the guitarists have is cause the detune/use too much bottom anyway, so you should aim to carve some space below them. Either by having them cut some bottom, or using the fact that bass cabs can get much more bottom than guitar cabs. Big and ported is the way for this. The Classic Ampeg 8x10 stack is probably going to be covering very similar frequency range to detuned guitars and big mesa 4x12s.

Sounds like the two of them are having a volume war with each other, the drummer seem happy to keep up, so you probably won't get so far with the asking them to turn down. Your only option is to get awesome earplugs and fight fire with fire. Problem is deaf guitards turn up even more. You have a great advantage that guitar technology has moved much since the 60s, but bass has. A couple of big modern cabs (aguilar GS412 would be the reccomendation from experience, good luck finding some though), big and ported, maybe a Barefaced Big One + matching Big Sub, a kilowatt + power amp (Crown or QSC) and the ridiculous bargain RPM1 preamp in for sale section will sort you, same sort of Ashdown tone, enough volume to melt your guitards. In fact, maybe go for biggest heaviest cabs you can (8x10s, Mesa) so they have to help move them, when they moan, say 'I only need these cause you won't turn down.'.

[quote name='MoonBassAlpha' post='785015' date='Mar 24 2010, 07:10 PM']just a note of caution here with the feedback thing. You will effectively be driving a full power square wave into your speakers.[/quote] Not quite sure how you are figuring that. Square wave distortion sounds nasty, and if it is coming from before the power amp, its not comparable to clipping the power amp into square wave territory.

The speakers help each other, its basically like doubling the motor strength, to the same cone. It means you need half the amount of air in the box behind them, but correspondingly twice the amp power, and it has the same max output as a single speaker (in a 2 speaker sized box, if that makes sense, like you could put one speaker in a 2 speaker sized box and get lots of bottom, 2 speakers in a 1 speaker sized box gives same bottom, but up tot he maximum of a single speaker.).