stevie

[quote name='Bill Fitzmaurice' post='1306659' date='Jul 17 2011, 01:45 PM']Exactly. All the parts are the same as a standard bass reflex, they're just rearranged. It would be easier to visualize as a bass reflex with the driver mounted in the usual fashion, but that's what one's imagination is for. Now if one has no imagination... [/quote] It doesn't look like a reflex cab no matter where you stick the driver. There is no Vb. The resonator chamber isn't loading the driver as it would in a normal reflex cab, because it's separated from the driver by a hole. Take away the resonator chamber and what you've got an arrangement that is closer to a transmission line than anything else. Not only that, but according to the patent, the design is flat to 7Hz using a 15" driver without any special characteristics. I'd like to see that in WinISD.

[quote name='alexclaber' post='1306489' date='Jul 17 2011, 11:02 AM']Stevei, tsn't a reflex cab a Helmholtz resonator? Though I see your point, you're suggesting that the cab works by solely exciting the resonant system of the two masses of air in the ports vibrating against the spring that is the volume of air in the enclosure divided by the area of the port:enclosure opening. But what's happening with the woofer backwave, why wouldn't that act like the frontwave from a woofer in a normal ported design?[/quote] A reflex cab contains a Helmholtz resonator, which is the vent, but a reflex system is more than just the vent. This design seems to rely solely on the vent to produce sound - just like blowing over a bottle. The contribution from the rear of the driver would be what you would expect from a driver in free air (or from the air blowing over a bottle)- practically nothing. I think the only reason the driver is not boxed in is because it would raise its resonant frequency. However, if you imagine this system with the driver boxed in, it starts to look very much like a bandpass system.

[quote name='Bill Fitzmaurice' post='1305759' date='Jul 16 2011, 01:42 PM']It's a bass reflex cab, nothing special or unusual except for the external driver mounting, and that serves no purpose, it could be inside with the same result.[/quote] It's not a reflex cab. It's a Helmholz resonator - it more or less says so on the drawing. It has more in common with a classical guitar than a ported cabinet.

I wouldn't call that B stock. It's plain faulty and you'd be justified in asking for your money back. You might be lucky, but you'll certainly never be able to rely on it.

[quote name='Musicman20' post='1289722' date='Jul 1 2011, 11:26 PM']I think I'll bow out and wait for the Bass Gear Magazine writeup. If you want to void the warranty, go down to 2.6 (?) or 2 ohms with non TC cabs. There is a vast library of info on talkbass about it.[/quote] Please don't think I'm having a go at you, Musicman, but all of the discussion on Talkbass (which I haven't read) would have been totally unnecessary if the manufacturer had provided proper specs. That's my beef. And we shouldn't have to wait for a magazine review to confirm a key product specification. I wonder if anyone has actually asked TC straight out what the score is.

I almost forgot - could you use a midi file of this? You'd have to message me your email address, as midi files won't post on here.

I stand corrected

[quote name='alexclaber' post='1289462' date='Jul 1 2011, 07:34 PM']If anyone's interested I can probably get a whole bunch of plots next week and we can see if there's anything special about the RS cabs.[/quote] That would be very interesting, yes.

[quote name='Musicman20' post='1289459' date='Jul 1 2011, 07:25 PM']Err, it is apparently. They don't know the exact ohmage of other peoples cabinets. Tom from Bass Gear magazine stated they have tested them, and the TC cabs are rated slightly higher in actual specs, so they know it will be safe.[/quote] They know as much about the impedance of other people's cabinets as any other amplifier manufacturer. It's not a problem for anybody else - they just state a minimum impedance and that's it. It says 8 ohms on the back of the TC cabinets. It says minimum 4 ohms on the back of the amps. They can't both be true. Which one is wrong? Their cabinets look quite good value to me. They shouldn't need to resort to these shenanigans to flog them. Just give us the facts and we'll make our own minds up.

I think the original was a Motown song, wasn't it? Your singer probably wants to be Michael Buble, who does an amazing version. :-)

[quote name='Musicman20' post='1251765' date='May 31 2011, 04:53 PM']Its because TC know the exact impedance of their cabinets, whereas they dont for other manufacturers.[/quote] Errr, no it's not. TC are withholding information from you to prevent you from making an informed decision. That way, you are more likely to buy their cabs to go with their amp. The same technique is used by the the utility companies to prevent you from switching suppliers. It's not very ethical, but there you go.

[quote name='Bill Fitzmaurice' post='1286571' date='Jun 29 2011, 04:08 PM']And Eminence didn't get to be the #1 driver manufacturer in the world by producing crap.[/quote] Just because you're the world's no. 1 manufacturer doesn't mean you don't produce crap. There isn't a natural relationship between size and quality. Look at General Motors.

[quote name='chris_b' post='1280435' date='Jun 24 2011, 01:57 AM']In real world situations this is probably closer to the truth. When I played a 210 and 115 Basschat told me that using different speaker sizes gave me problems, but it didn't! Now I'm being told I have a problem because I stack my cabs the wrong way. I don't! People should put more trust in what their own ears tell them.[/quote] +1 to that!

[quote name='Pete Academy' post='1280728' date='Jun 24 2011, 11:26 AM']Someone bought an original '61 Strat in to our shop. As soon as it was plugged in you could hear how much better it sounded. As a bass player I hate the back pickup on Strats, but this was fat and smooth - no harshness whatever. The whole sound and tone was just amazing.[/quote] After all those years, what are the chances that the pickups were original? A Duncan APS-1 will improve the sound of the back pickup on any pre CBS strat - not that many people are likely to swap.

[quote name='Mr. Foxen' post='1280965' date='Jun 24 2011, 01:35 PM']That is much less expensive than I was anticipating.[/quote] The reviews are a bit mixed though.

[quote name='Al Heeley' post='1280547' date='Jun 24 2011, 09:24 AM']Just bought a 250W Hartke VX 2x10 + horn from a basschat member which would be handy to position just behind the head of our drummer to help him keep time.[/quote] Isn't that the guy who's supposed to help everyone else keep time?

[quote name='Mikefwlr' post='1280931' date='Jun 24 2011, 01:13 PM']EA seem quite secretive about the specs for their cusdtom drivers. Guess i could measure the impedance with a multimeter (but i don't have one), anyone know the specs of these woofers?[/quote] That's because they like charging £150 a driver for replacements. Measuring the impedance won't get you very far, I'm afraid. If you want to send me one before they both die completely, I'll measure the T/S parameters for you.

If you have any old sleeping bags or duvets you don't need, take the filling out and use that. It's the same stuff.

The Merlot and Cabernet Sauvignon differ in their sizes and are outstanding on their own but make an even better wine when combined. The Cabernet Sauvignon is smaller but it gives body to the mixture while the Merlot, on the other hand, lightens the Cabernet. The Cabernet Merlot blend has a very rich scent that has the touches of black currant, dark berry with a little kick of mint, eucalyptus, chocolate and subtle oak. This wine mixture is best produced in a cool climate and its taste depicts the strength and richness of the Cabernet that is blended and is softened by the Merlot wine that makes it all the more elegant. The lightness of Merlot wine blends well with the strength and body of Cabernets that bring about quite a rich and complex wine mixture. The combination of their differences in terms of quality, taste and other characteristics seem to make the Cabernet Merlot wine such an interesting wine to try and check out. This wine pairs well with many types of cuisines among of which are red meat, pork, poultry, and pasta with a rich and thick sauce.

[quote name='Phil Starr' post='1263233' date='Jun 9 2011, 08:40 PM']All this stuff about not mixing drivers is just an old wives tale. The 'character' of a speaker is largely about frequency irregularities asnd if you mix drivers these are not likely to coincide so you might lose some character, but some characters do need a little turning down at times. There are problems with any multi driver set up too but this is as true of identical drvers as differing ones. Some combinations work and some don't and some of us like a coloured sound and some don't. You have to listen to judge whether a particular combination will work for you.[/quote] +1 - especially the bit about multi driver setups being flawed. But if you're going to do it, this is a sensible way of approaching it.

The Sidewinders were quite good speakers in their day. They were introduced in the mid 1980s and were based on Electrovoice designs. You should be able to pick one up on eBay for not very much money, but you'll probably have to wait a while for one to appear. Still, if you follow Moos3h's advice I'm sure you'll be fine. If you would like someone to double check the technical aspects of the design, post the internal dimensions of the cab (to get the internal volume) and the dimensions of the ports (internal diameter and length). But it certainly looks like a fairly standard box and you should be perfectly OK fitting a pair of Kappalite 15s in there. As these seem to be be quite expensive now, it might also be worth looking at the equivalent B&C or BMS, which will sound better if you don't mind investing a bit more dosh.