Bill Fitzmaurice

[quote name='fatback' timestamp='1328701407' post='1531277'] If they're not common, is there any particular reason why? [/quote]Unless you have an amp capable of 2 ohm operation you'd only be able to use one. And there's no benefit to running a 4 ohm cab.

[quote name='Freddie75' timestamp='1328561543' post='1529209'] I don't really have much knowledge in this area so any help would be appreciated. [/quote] A great deal of knowledge is required for a successful result. For one thing the power rating of the drivers has no direct relationship with output capability. IMO if you don't like what you have sell them and buy something you do like.

Beta is a simplified version ( it has nothing to do with age) using fewer driver parameters, so the result isn't as accurate.

[quote name='frosty55' timestamp='1328357218' post='1525890'] I didnt choose the driver, I just found it up in the loft. I have a bass guitar and a 100W H&H amp, and I wouldnt mind gigging again. I just need a plan, with dimensions, of a suitable cab. [/quote]In that case you'll find it on the Eminence site,

[quote name='frosty55' timestamp='1328184784' post='1523148'] I was actually looking for dimensions/plan of the cab. Cant calculate from graphs and suchlike. Seems like you need a degree in maths for that. Any other sources you know of? [/quote]My first question would be why the Delta 15? If you can't answer that question based on your results of software modeling its response and displacement limited output then you shouldn't be considering it at all. And if you were able to model its response and displacement limited output you wouldn't be asking about cab designs. Before thinking about building your own cab you do need to have a very good undertsanding of what's contained at these two sources, and how to use design software: http://www.eminence.com/support/understanding-loudspeaker-data/ http://techtalk.parts-express.com/showthread.php?t=219617

[quote name='Phil Starr' timestamp='1328122134' post='1522226'] Well it is an interesting choice of driver with High Q and high Vas it wants a big cab. Win ISD came up with 654l as a first suggestion! With a 100litre cab tuned to 40 Hz (10.2cm dia 7.81cm port) it shows a big peak in the bass at 100Hz (about 3dB) but quite wide and flat. Combined with this speaker's big midrange peak this is going to have an 'interesting' sound. You might like it. [/quote]+1. It's an adequate driver for a very low power amp that needs a midbass response peak, 50 watts tops. but that's it.

[quote name='Dave Tipping' timestamp='1327619490' post='1514481'] Any suggestions for a nifty way to damp the vibrations between the two? [/quote]You should be able to find something like this: http://www.walmart.com/ip/Ozark-Trial-Camping-Pad-Blue/16783660

[quote name='nickhuge' timestamp='1327600588' post='1514083'] Its interesting that on the markbass site it says "This cabinet was redesigned in Spring 2007, and now stacks perfectly with all Standard series cabinets." If it's a bad idea, why redesign it? [/quote]Manufacturers build what sells, what sells is cabs sized so that they stack nice and pretty. How they sound together is not a consideration. Looks is what sells cabs. As for the issue of watts: moot. Watts have very little to do with how loud a rig will go. Why is nicely spelled out at the Barefaced Bass site.

[quote name='nickhuge' timestamp='1327597457' post='1514021'] The Ampeg is rated at 500W. What do I need to get in terms of specs for a suitable pairing? Another 8ohm, but what power handling? [/quote]Power ratings are meaningless. What matters is impedance, displacement and phase response. For equal power into both cabs they must be the same impedance. For equal ability to use that power both cabs must have the same driver displacement. For the same phase response they must be identical drivers. With identical cabs you get all of the above, with mis-matched cabs the best you're likley to realize is equal impedance.

[quote name='nickhuge' timestamp='1327593196' post='1513924'] Hi All I'm geting a Markbass Traveller 1x15 and being a dumb guitarist clueless with bass I have been told I am being naive thinking for bigger shows I can pair it with Markbass 4x10 (even though on the markbass site it says its been redesigned so it stacks with the standard cabs). Is there anything other than another matching cab I can pair it up with? Perhaps a 2x10 102P? What's best? Hope you can help ps, it's being fed by an ampeg SVT III Pro [/quote]You can pair it with anything so long as the amp will handle the impedance load. Most of the time you'll get best results with another identical speaker.

[quote name='far0n' timestamp='1327342003' post='1509645'] Yeah same cones, just different impedence. I'm assuming the 4 ohm cone will have more windings? [/quote]If anything less, but that assumes the two coils use the same wire gauge, and you can never assume anything. In any event if you need to know the end result difference modeling software will tell you.

[quote name='Dave Tipping' timestamp='1327002394' post='1505128'] THE QUESTIONS -> 1.) Will the terror bass head through the SP210 be a decent bit louder / punchier / bassier and have more clean headroom than the Ampeg BA115? [/quote]The amp, maybe. The speaker, no. Go to the Barefaced bass site and read about the main limiting factor in speaker output, displacement. The displacement of the SP210 is about 150cc; a standard 2x10 with the same drivers would be 300cc, but the isobaric loading of the SP cuts displacement in half. That's the price paid for its small size. The displacement of the BA115 is 330 cc.

[quote name='lovetheblues' timestamp='1326664433' post='1500282'] Cab 1: Ampeg SVT Classic 410 BE, USA made, 8 ohms, 500 watts (sealed) Cab 2: Avatar B410 with the ceramic magnets, 8 ohms, 1400 watts (ported) [/quote]Avoid the Avatar. The drivers used, Delta 10s, are marginal for electric bass use.

Use a DI for the lows, a mic for the mids and highs. Effects pretty much don't affect the lows anyway, and a mic will catch the tone of the speaker as well.

[quote name='mikhay77' timestamp='1326318605' post='1495525'] Can't see valve production stopping in my lifetime!Only when musicians aren't needed anymore. The day it happens is the day Fender stop making Strats,Jazzes and P's,well IMO! [/quote]Tried buying Kodachrome lately? How about a typewriter? Buggy whip?

[quote name='clauster' timestamp='1326286624' post='1494898'] According to my plans, the Beta10 was a recommended driver and that has a 16 ohm variant. [/quote]There may have been a Beta 10b (16 ohm) at some point, but it's not currently offered.

[quote name='Count Bassy' timestamp='1326227648' post='1494186'] I think some here said in another thread, some time ago, that had Neo not been available then ceramic magnets would have been developed to meet almost the same performance by now anyway. [/quote]They were developed and have been in use since the 1970s. The advantage to neo is that it can do the same thing with both less weight and lower cost. The cost benefit has been largely lost, but not completely. The Eminence 3015LF still holds a slight price advantage over the typical ceramic equivalent, such as the B&C 15TBX100, at least on this side of the pond.

[quote name='flyfisher' timestamp='1326207372' post='1493798'] I can't see valves disappearing unless demand really does disappear. [/quote]Demand already has disappeared. The music industry alone uses tubes, and it's a very small industry in the grand scope. The largest consumer of tubes was the military, and the reason former Eastern Bloc countries continued to produce tubes long after the West stopped was that their militaries still employed them. Once all the Soviet era military hardware using tubes has been retired so will the tube, as few musicians would be willing to pay the 50 pounds each that a 12AX7 will eventually go for. Eventually the tube will go the way of photographic film.

[quote name='kennyrodg' timestamp='1326186421' post='1493339'] It makes me wonder why it's 8ohm in the first place [/quote]Good question. None of the drivers recommended for it are available in 4 or 16 ohm.

[quote name='jackers' timestamp='1326198111' post='1493560'] This is true. China have almost all of the worlds supply of rare-earth metals, so they have a monopoly on neodymium, [/quote]Rare earths aren't rare at all, and most of the world's supply is outside of China. It's only rare earth mining and manufacturing that's concentrated mainly in China, a situation that is changing by the day. The current neo shortage won't last. Tubes OTOH are going away, it's just a matter of time. Producing them without destroying the environment is just too expensive, and when the Russians and Chinese finally wake up, smell the coffee and institute safe manufacturing regulations tubes will be history.

[quote name='kennyrodg' timestamp='1326038442' post='1491390'] Hi Bill, Thanks for coming along. i want to run the cab at 8ohms then I have the option of running another cab for larger venues if required. If you there is no need or a better option for me i'd appreciate the advise. See forum title=Numpty Thanks, Pete. [/quote]You'll likely find 4 ohm or 16 ohm drivers hard to find. I don't know of any off hand, neo or ceramic.

[quote name='kennyrodg' timestamp='1326031286' post='1491247'] run the can at 8ohms. [/quote]Why?

Output is limited by displacement. You can read about it on the Barefaced site. But you won't be able to compare the displacement of any other cabs to Barefaced cabs, because only Barefaced publishes their displacement figures.

[quote name='cytania' timestamp='1325485856' post='1483527'] I still wonder about getting some drummer headphones and standing there looking a noob like Paul Gilbert or Keith Moon (or do they look cool?). [/quote]Danny Seraphine used headphones back in the 60s, for a very good reason: foldback monitors had not yet been invented. No one ever accused him of being a noob.

[quote name='Mr. Foxen' timestamp='1325462303' post='1483451'] "Wattage" also relies on the cabinet since it varies with impedance, hence voltage swing, since that is the what the amp provides. [/quote]+1, and that's another reason why even rating amps with watts is of dubious value. They should be rated by voltage swing, just as light bulbs should be rated by lumens, which completely removes the fudge factor. But that's very much diametrically opposed to the goals of marketing.