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Low Down Sound 15/6.5 Cab

#561
Yeah, come to think of it there was a large system setup for us at last year's car show. So yeah, there has got to be some kind of PA support. We have not played this particular show with this particular organization so I'll have to check into it further.

There are many stages and we are just one of them. We're there to help attract people to the Harley area. Its quite an honour.
 
#566
Better mileage comes from pointing at the driver datasheet link, not a commercial outlet page ; p
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I don't know if this makes the link "non-commercial" but here's the manufacturer's web site.

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If that still violates - I guess I can post the quoted price and t/s directly - but all I really want to do is identify the driver precisely, give notice of the going rate on the market, and ask if anyone has tried it your 15/6.5 box, or considered trying it.

Thanks
 
#567
Foz said:
I don't know if this makes the link "non-commercial" but here's the manufacturer's web site.

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If that still violates - I guess I can post the quoted price and t/s directly - but all I really want to do is identify the driver precisely, give notice of the going rate on the market, and ask if anyone has tried it your 15/6.5 box, or considered trying it.

Thanks
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The 3015LF will play ~4dB louder without distortion.

Alex
 
#574
greenboy said:
I don't know if it's faulty measurement techniques or if Faital just doesn't yet have driver materials use / design down - because most of their graphs show a characteristic valley right in what would otherwise be the useful range of operation. This graph seems not to be an exception.
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Yeah that's really weird - their mids show that as well as do pretty much all the drivers I've looked at.

I wonder if they'd turn out differently measured in a cabinet and all that.

I might get an opportunity here soon to A/B my fEarful with a 15.6 from Marc @ Dr. Bass using faital drivers, so I'll see if I can work out a way to take some measurements if that works out.
 
#575
So far I've seen only a couple of neo 18Sounds that I could make a case for if less power-handling were acceptable and cost were not an issue. I wouldn't even consider a non-neo when a great neo can be had because PART of the magic of these enclosures is highest potential SPL per pound. That ratio goes way down when you throw in say another 12 pounds (allowing for heftier baffle as well).

The only driver I've seen as an all-around alternative design contender (not all-around winner) if cost and availability allowed, is the BMS 15N630, which Passinwind and I both chased (and he ended up being able to get before the dealer who had me slated for one went under). This driver had less xmax, but enough so that it wasn't an issue, and could perform basically the same job as the 3015LF does in maybe 80% the space.

But that driver is almost impossible to get in the US and when it can be had is at least $100 more. There's the SPL per DOLLAR equation sticking up its ugly mug ; }
 
#576
One interesting thing I see about the Faital woofer charts is that they don't have a breakup mode that is as peakey as the 3015LF. So I can definitely see the appeal there if you're a company who doesn't want to spend the green on a 500/800hz crossover.

I'd anticipate you could get away with crossing that faital over around 1.2khz pretty easily which would probably bring the cost of the crossover down (and the difficulty). Heck you could probably just squeak by with a straight high pass if it sounds as good up top as Marc claims.

Obviously that defeats a lot of the purpose of using a high quality midrange, but in looking at that chart closely I can see why folks who don't want to design a complex crossover might like it.
 
#577
rpsands said:
Yeah that's really weird - their mids show that as well as do pretty much all the drivers I've looked at.

I wonder if they'd turn out differently measured in a cabinet and all that.
Click to expand...

They do. Though I don't recall their cutsheets saying always just what it is.


I might get an opportunity here soon to A/B my fEarful with a 15.6 from Marc @ Dr. Bass using faital drivers, so I'll see if I can work out a way to take some measurements if that works out.
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Unless you can at least do windowed impulses you don't have a chance of producing anything tha'll mean anything, let alone when used comparatively, unless you go to a big backyard and set up "just so".

Anyway, anything I've seen from Dr Bass seems to be designed around hit-and-miss luck. Some of the more ambitious Dr Bass designs are missing things like proper-sized ports and anecdotally are tuned too high, I just don't think they end up being what they could be ... Not that I am interested after the abysmal and huge improprieties exhibited in the Dr Bass business model. They could come up with a Meyers-quality box and I'd be loath - or afraid - to buy it.
 
#578
Here is a shareware program you can play around with to take windowed impulse measurements... very versatile. You can't save files with the demo version, but the license for personal use is only 79 Eu - and if all you want to do is compare a couple of speakers you can screen grab results from the demo and get graphs suitable for casual analysis.

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Setting up speaker measurements using the ground plane technique is pretty easy - all you need is a PC/Laptop, some software, a flat mic [Behringer sells one for about $60], a decent sound card with mic pre and a reasonably large room - unless you want to look really low in the band (that'll take a really big room or an empty parking lot) - measuring to compare xover performance and/or mid-band break up you can do in any decent sized class room.

Also Arta makes summing measurements to make polars easy so you can look at on-axis versus off-axis performance... it'll even make way cool psychedelic sonograms.

Here's a very nice paper on ground plane measurement [*edit to fix link]

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and more basic description

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