stevie

[quote name='xgsjx' post='1320924' date='Jul 29 2011, 10:45 PM']Agreed, you would expect that but it does depend on what make of driver it is though. A cheap 15 will most likely go lower than a cheap 10 as it would most likely have a greater excursion, but with a well built driver a 10 could have as much excursion as any other size & then it's down to all the other parameters & how well the cab has been designed to accommodate the drivers.[/quote] I think you always have to try to compare like with like. Yes, you can get hi-tech 10s that will do wonders, and 12s that will outperform many 15s. Interesting that you bring up the question of driver quality though, because the total cost of the drivers in a 4x10 is about three times that of the equivalent 1x15. Anyone trying to buy a half decent set of 10s is going to be spending over £200. Spend £200, or even £300, on a 15" driver, and your 15" cab becomes a completely different animal.

[quote name='DirkThrust' post='1320906' date='Jul 29 2011, 10:27 PM']Let me put it another way without namecalling.[/quote] Thank you. [quote name='DirkThrust' post='1320906' date='Jul 29 2011, 10:27 PM']I've found that a 4x10 produces more thump, thud, thunk, whump or whatever other unscientific name you call the sound bass players like than a 1x15. IME, YMMV of course.[/quote] I accept that's your experience and I haven't said anything to the contrary. I was questioning the statement that most 4x10s go lower than most 1x15s - and explaining why I think it's not always the case. In the same size cab, a 4x10 will be louder but a 15 will go lower. On average, that is. That's my point.

I think this is the first time I've seen anyone resorting to namecalling on Basschat.

[quote name='xgsjx' post='1320798' date='Jul 29 2011, 08:12 PM']Most manufacturers 4x10s produce more lows than their 1x15s.[/quote] Yes, I've heard that too. You really would expect the opposite to be the case though. You'd expect the average 15" driver to go lower than your average 10" driver because of its lower resonant frequency and greater excursion.

[quote name='Benplaysbass' post='1320618' date='Jul 29 2011, 04:29 PM']I had thought that the 115 cab would give it the lows.[/quote] That's what most people would do but some people believe you should never mix driver sizes.

[quote name='ficelles' post='1320497' date='Jul 29 2011, 02:46 PM']Any rule of thumb for size?[/quote] Doesn't it depend on the EBP and Qtc?

[quote name='andydye' post='1276680' date='Jun 21 2011, 09:23 AM']My intention is that it will have an internal void of 300x300x300mm with 4 25mm dia vents in the front, this matches the Eminence data sheet vent requirement for my chosen speaker (Eminence Basslite CH2010 10") but exceeds the data sheet for internal volume (would be 300x300x200mm) as I liked the idea of a bass-cube...[/quote] Only just noticed this - these DIY posts disappear from the radar very quickly. If you've not started building yet - don't build a cab that's a cube. It's the worst possible shape. The ideal is to have each dimension different to prevent standing waves that will come out through the cone and colour your sound. Also, don't use four 1-inch ports. Just use one.

There's a useful comparison of some P-bass pickups here: [url="http://www.atkinsonbasses.com/multimedia"]http://www.atkinsonbasses.com/multimedia[/url]. The GFS ones certainly sound good (no Wizards though, and no Fralins).

You don't really need a 2-way crossover, although if you're prepared to pay for one it won't do any harm - it will just make the wiring more complicated. Most cabs don't use anything on the bass drivers; they just filter the low frequencies out of the horn. A capacitor and small inductor will do it, but you need to know the recommended crossover frequency and impedance of the horn to work out the correct values.

No free lunch needed. You are sacrificing the high frequences on axis to bring them closer in level to the high frequencies off axis. Quasi constant directivity. This is a really neat idea, provided free of charge to the guitar playing community and very nicely documented. I wish I'd thought of it - don't you Bill?

[quote name='StevieD_FenderP2009' post='1317890' date='Jul 27 2011, 02:16 AM']Hi there dude how would I wire it in like this?[/quote] Two wires from your input into the crossover and from there into your horn. The crossover is in parallel with your main drivers.

I don't know whether to laugh or cry.....

[quote name='Marvin' post='1318382' date='Jul 27 2011, 03:52 PM']Are you suggesting I'm just a sheep?[/quote] Now you're putting words in my mouth :-)

[quote name='Marvin' post='1317459' date='Jul 26 2011, 06:57 PM']You seem to be trying to say that Bill and Alex are peddling snake oil, for want of a better analogy.[/quote] You're putting words into his mouth, Marvin. What he is saying IMO is that you should think for yourself and not be a sheep. Self-styled gurus are often not quite what they appear to be. To quote Socrates: To find yourself, think for yourself.

I'd advise you to what I did and download a free program called Best Practice which allows you to play back the MP3s at a slower speed without altering the pitch. Some of the Major's pieces are much too fast for amateurs like me.

OK then. Please enlighten us and explain why blocking off the hole would help.

[quote name='Mr. Foxen' post='1316899' date='Jul 26 2011, 12:31 PM']Think the point is it doesn't work the way you think it works.[/quote] It's quite clear how it works. There's a link on the page Lawrence gave that takes you straight to the designer's description. Blocking up the hole is nonsense.

[quote name='LawrenceH' post='1316247' date='Jul 25 2011, 08:56 PM']but a neater solution (IMO) is Jay Mitchell's 'foam donut' [url="http://www.stratopastor.org.uk/strato/amps/prii/speaker/foamdonut/foamdonut.html"]http://www.stratopastor.org.uk/strato/amps.../foamdonut.html[/url][/quote] I've never seen that before, but it's very clever. And it's properly documented with measurements. Excellent.

[quote name='Bill Fitzmaurice' post='1316462' date='Jul 25 2011, 11:22 PM']I think you'd find adding a beam blocker to the hole in that foam thingamajig would get a better result than either alone.[/quote] The hole in the foam is an integral part of the design. If you block it up with a beam blocker it won't work properly. Have you read the description?

[quote name='Marvin' post='1316071' date='Jul 25 2011, 06:41 PM']Most mass manufactured cabs are simply constructed boxes with drivers in them with little or no acoustic engineering involved in it's design.[/quote] Most commercial bass cabs I've seen are reasonably well designed. I agree that there is a tendency to cut corners to get the price down. It has to be said, however, that very little acoustic engineering is actually required to knock together a bass guitar cab. The real engineering has been done by the driver manufacturer. This is why anybody who can use a saw and and screw together a simple box can build one and it will work. The hardest part is getting the box to look pro.

Most times, 'not flash' is what the music needs. I like the Rhythm Kings - a bunch of great musicians.

[quote name='Mr. Foxen' post='1316026' date='Jul 25 2011, 05:54 PM']The top of the cab will be higher if it is stacked vertically, that is a bunch of the point.[/quote] I agree that getting the cab to a height where you can here it properly is what matters. When you've got that sorted, it is a matter of personal preference what speaker configuration you use.

[quote name='Mr. Foxen' post='1315993' date='Jul 25 2011, 05:33 PM']No, Fender didn't make tall stacks, they made short combos, and guitartists tend to sit on them or stand in front of them, so all the top end misses them and icepicks anyone in front..[/quote] Sorry, I was too cryptic. When standing in front of and above a speaker, a guitarist will hear more and smoother mids and highs when the speakers are side by side than when they are vertical, assuming the top of each cab is positioned at the same height.

[quote name='Mr. Foxen' post='1315981' date='Jul 25 2011, 05:27 PM']I think audience on axis, but guitard's ears off axis is usually the problem scenario.[/quote] That would be one vote for Leo Fender then.

[quote name='skankdelvar' post='1315972' date='Jul 25 2011, 05:23 PM']If one is out there amid the audience and one can perceive it then, yes, it might indeed be obvious.[/quote] This is a solution looking for a problem. Have you ever been in an audience and not been able to hear the guitar?