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Rick,You are one of the few speaker builders I know of that has used the 23W SS sub in designs. Can you give a subjective opinion of the fidelity of the woofer compared to the Aura products? I'm not that interested in overall SPL, more sound quality.Thanks,C
The 23W/4557T00 ?It has a really low fs as well. 20,5hz! It's a fun driver as it has no 2'nd harmonic...I'd say the Scan Speak is a texture master. By this we think of the Scan Speak as having no "warmth" of it's own (The absence of 2'nd harmonic..).This is audible so that bass instruments say acoustical bass, you can more easily hear how all parts of the instrument contributes to the total vibration of the instrument. Yet the instrument sounds like it's "dry"/"Realism ...The Aura Sound woofers have a more JBL'ish? type of "warmth" ... Eh? Gives you a more "mass and weight feel...of the sound".This is most likely depending on a lot of factors.. and is more of a character difference than an actual BIG difference.It should be perceptible.. ever so lightly however. The 23w is something like 7db less sensitive than your typical Aura Sound driver, that is also a thing to remember..You cannot just use any amp with this black hole of a woofer! You need serious torq!Another thing is that the 23w is a bit insensitive to what kind of stuffing you use in the cabinet, this is reported some places on DIYforums. Uhm, so using wool won't give it much more warmth sort of speak. Say playing the song "Sledgehammer" from Peter Gabriels So album (What a super album!!!)I'm guessing here, but I'm gonna try to word this..The linianite Subs should (by using the 23w's) achieve a Levin that plays more free of the soundfield, with a more sense as to what string is actually being struck. Trying to figure out what string Levin is striking is a bit of a problem as he,especially on "Sledgehammer", appears to be playing a one string bass... (I believe it was a 4 string'd Music Man Sabre)I'm guessing a quad of 23w's will nail it with regards to what finger is pulling what string...Again... I'm trying to iterate a "text" here with regards to how one can put into words the sonics of a sub driver...Which granted must be really "deep stuff to try to write..." ...Anyway. Lets hope i didn't get to far out on the deep end here... Ps 42:7Imperial
Yes, I've seen the sensitivety quoted as something in the 79 - 82.5db zone...for the 23w. I'm not sure what the real number is.Imperial
To use the 23W it in a three way, would you need to go active? Or could it work with two per side in parallel for what would still be moderately low sensitivity?Thanks for your time,C
- it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz.Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz.
even on passive, isn't a series capacitor a high-pass filter??
Quote from: chrismercurio on 5 Dec 2007, 04:36 pm- it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz.Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz.Why would you put a capacitor in series with a sub-woofer???
Quote from: Jazz and Baroque on 5 Dec 2007, 04:59 pmQuote from: chrismercurio on 5 Dec 2007, 04:36 pm- it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz.Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz.Why would you put a capacitor in series with a sub-woofer??? It's rare but I have seen this done on small monitors to prevent the woofer from too large of an excursion. Obviously with this driver that's not needed and 18L is too small of an enclosure for it.
Quote from: Rick Craig on 6 Dec 2007, 03:58 amQuote from: Jazz and Baroque on 5 Dec 2007, 04:59 pmQuote from: chrismercurio on 5 Dec 2007, 04:36 pm- it goes LOWWWWW.... : reflex: 63 liter, tuned to 17 Hz with a 60mm diameter tunnel, 440mm long gives a -3 dB of 14 Hz.Closed in 18 liter, with a 2.000µF capacitor in series gives a -3dB of 25 Hz.Why would you put a capacitor in series with a sub-woofer??? It's rare but I have seen this done on small monitors to prevent the woofer from too large of an excursion. Obviously with this driver that's not needed and 18L is too small of an enclosure for it.I think the series cap is to tame the resonant peak from the high Qtc alignment, allowing one to use a smaller box. It provides excursion protection, too.
Rick, what do you think of the Dayton RSS265 10" aluminum woofer? It looks a lot like the Aurasounds.The Aurasound 794 is almost three times more expensive than the 513, it should be a beast!
