Hi all,
Started to get interested in audio 20 years ago (yikes!). Got seriously distracted with work and family, but a friend has renewed my interest. I've been lurking and searching on horns, TL and full range and love the concepts. I've seen the FAST abbreviation but can't for the life of me work out what it means.
I'm also not sure if full range is the way for my music listening as while I have eclectic tastes I do listen to a lot of rock. I'd love some thoughts.
Regards
Paul
Started to get interested in audio 20 years ago (yikes!). Got seriously distracted with work and family, but a friend has renewed my interest. I've been lurking and searching on horns, TL and full range and love the concepts. I've seen the FAST abbreviation but can't for the life of me work out what it means.
I'm also not sure if full range is the way for my music listening as while I have eclectic tastes I do listen to a lot of rock. I'd love some thoughts.
Regards
Paul
Another way to think of it is "Two-way with low XO"
as for the awesomeness -well that depends on the implementation
as for the awesomeness -well that depends on the implementation
Hi,
Bass unit and a FR. Bass unit about 4dB more sensitive than the FR.
Crossover 1st order series in the middle of the baffle step caused
by the baffle width. FR sealed. Bass sealed or vented.
rgds, sreten.
Alternatively just build this : https://sites.google.com/site/undefinition/tarkus
Bass unit and a FR. Bass unit about 4dB more sensitive than the FR.
Crossover 1st order series in the middle of the baffle step caused
by the baffle width. FR sealed. Bass sealed or vented.
rgds, sreten.
Alternatively just build this : https://sites.google.com/site/undefinition/tarkus
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Much to prescribed. I've done what I call FASTs with all but 1st order XO'ers. And why not a horn on the woofer?
Generally correct about baffle step, but again, not really a requirement. Some people cross quite low (circa 100hz).
Hi,
Whatever, an FR with subwoofers is not IMO a FAST.
No different to any small speaker than needs subs.
IMO the the emphasis in on ASsisTed, and BSC.
For ASsisTed*, power handling, max SPL and frequency
balance all improve a lot, compared to just adding subs.
YMMV thinking something else, fair enough.
rgds, sreten.
* Done right.
Whatever, an FR with subwoofers is not IMO a FAST.
No different to any small speaker than needs subs.
IMO the the emphasis in on ASsisTed, and BSC.
For ASsisTed*, power handling, max SPL and frequency
balance all improve a lot, compared to just adding subs.
YMMV thinking something else, fair enough.
rgds, sreten.
* Done right.
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its something I'd like to try and have work - a quick lashup some years back with a 10" butyl rubber surround Pioneer woofer and 1st order to 6.5" Fostex indicated too much modulation distortion. 2nd order highpass may work - 200 watt input peaks would not be too much - I want a small system which sounds coherent and to approach the subjective cleanliness of a decent front-load horn system with material such as Dan Weiss "Tiintal" CD where there's a lot of packed/fast drum note flurries against a Strat guitar as the drone instrument.
Freddi,
The way to go is a minidsp and bi amping. It lets you play with XO slopes and location. Use a K15 as the sub with XO at 200 Hz and use one of your smaller SK8 with an AN8 or W8-1772 on the top. That would sound great probably very clean dynamics.
The way to go is a minidsp and bi amping. It lets you play with XO slopes and location. Use a K15 as the sub with XO at 200 Hz and use one of your smaller SK8 with an AN8 or W8-1772 on the top. That would sound great probably very clean dynamics.
Thank you, this like what I might be after. Sounds like separate enclosures and sometimes separate amps? Any links or designs I should look at?
There is some info here on a FAST system I did using a miniDSP and inexpensive class D amps. http://www.diyaudio.com/forums/full-range/249984-cheap-fast-ob-literally.html
Look for the thread called "a Speaker that kicks butt in large spaces" to find out more about the Karlson k15 which I proposed to Freddi to use as the woofer or sub woofer of a FAST. For the full range top I proposed a SK8 which is a scaled down K15 for an 8 in driver. This is perfect because the sk8 don't have much below 100 Hz but the cabinet reduces displacement by effectively loading the driver.
Hmm, and here I always thought it meant:
Fullrange AS Tweeter.
Basically a design using a fullrange driver above the baffle-step region. Of course highly dependent on the size of the baffle - which could have a very small baffle with a resulting high-pass behavior nearing 1 kHz. Nor necessarily utilizing an electrical high-pass filter for the driver, though usually advisable. Nor necessarily utilizing a low-pass electrical filter for the bass driver, though again - likely advisable for most designs and bass drivers.
A commercial example:
6moons audio reviews: Boenicke Audio W5
Fullrange AS Tweeter.
Basically a design using a fullrange driver above the baffle-step region. Of course highly dependent on the size of the baffle - which could have a very small baffle with a resulting high-pass behavior nearing 1 kHz. Nor necessarily utilizing an electrical high-pass filter for the driver, though usually advisable. Nor necessarily utilizing a low-pass electrical filter for the bass driver, though again - likely advisable for most designs and bass drivers.
A commercial example:
6moons audio reviews: Boenicke Audio W5
Someexamples in this thread: http://www.diyaudio.com/forums/full-range/144099-thread-tysen-variations-fast.html
dave
dave
I loath the FAST acronym on a molecular level. It's nonsensical -so, subwoofers have suddenly become 'technology' while all other drive units, presumably, are not? Of course, the alternative Fullrange ASsisTed or Fullrange AS Tweeter circumvent that, but are two of the most lame uses of lettering in an acronym it has been my misfortune to encounter. There merest sneaking urchin ever whelped in an 18th Century gutter would be ashamed of them.
They're two-way speakers. They just happen to have a relatively low crossover frequency. Sometimes. Even that isn't invariable. Either way, they can work very well when designed & executed properly.
They're two-way speakers. They just happen to have a relatively low crossover frequency. Sometimes. Even that isn't invariable. Either way, they can work very well when designed & executed properly.
The moment it has 2-way in its name we can't talk about it in this forum but need to go over to Multi-way forum. 🙂
2-way Low XOver or 2LOXO?
2-way Low XOver or 2LOXO?
Possibly better off there. Using a widebander as a mid-tweet doesn't automatically mean the XO is going to be simpler than some others with, say, midbass + dome tweeter. It can be, but it's not a given. I don't see it mattering where it goes though.
Hey Scott,
It's not my favourite either but loathe? Maybe read it differently. It's not boring old FR and super duper subwoofers, it's how you combine FR & Subs that is the technology. (FAS)T might be more appropriate.
Cheers.
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