Hi,
I would like to know what box you guys would reccomend that would get me down to 20hz using the following driver:
Re: 3.7 ohms
Le: 1.30 mh
Fs: 23.5 Hz
Qms: 2.73
Qes: 0.416
Qts: 0.361
Vas: 61.6 Ltr
Mms: 232 g
Cms: 0.35 mm/N
Sd: 468.7 Cu Cms
Bl: 17.46 T-M
Xmax: 15mm
I hope the driver is pretty good as it is cheap and available on my side of the pond.
atb,
greg
I would like to know what box you guys would reccomend that would get me down to 20hz using the following driver:
Re: 3.7 ohms
Le: 1.30 mh
Fs: 23.5 Hz
Qms: 2.73
Qes: 0.416
Qts: 0.361
Vas: 61.6 Ltr
Mms: 232 g
Cms: 0.35 mm/N
Sd: 468.7 Cu Cms
Bl: 17.46 T-M
Xmax: 15mm
I hope the driver is pretty good as it is cheap and available on my side of the pond.
atb,
greg
Its the driver from this subwoofer that bk electrnics produce:
http://www.bkelec.com/HiFi/Sub_Woofers/monolith.htm
The driver is based around a lab12 i think.
greg.
http://www.bkelec.com/HiFi/Sub_Woofers/monolith.htm
The driver is based around a lab12 i think.
greg.
sreten here's the link:
http://www.bkelec.com/HiFi/Drive_Units/BSB/monolith_du.htm
Ive come up with a design in unibox, il post the graphs to see what you think (it probs needs improving).
Here's some stats on the design:
VB: 65l
FB:21.00
F3: 20.32
2 ports (8.00cm Dia) with a total length of 99.56cm.
106db at 20hz
Here's the graphs:
Response Graph - http://img59.imageshack.us/img59/7279/vbresponsemonolithdrivean4.gif
Excursion Graph - http://img59.imageshack.us/img59/9933/vbexcursionmonolithdrivfv5.gif
Am i on the right track?
Thanks,
Greg
http://www.bkelec.com/HiFi/Drive_Units/BSB/monolith_du.htm
Ive come up with a design in unibox, il post the graphs to see what you think (it probs needs improving).
Here's some stats on the design:
VB: 65l
FB:21.00
F3: 20.32
2 ports (8.00cm Dia) with a total length of 99.56cm.
106db at 20hz
Here's the graphs:
Response Graph - http://img59.imageshack.us/img59/7279/vbresponsemonolithdrivean4.gif
Excursion Graph - http://img59.imageshack.us/img59/9933/vbexcursionmonolithdrivfv5.gif
Am i on the right track?
Thanks,
Greg
Greets!
It may be OK, but the long vent's pipe harmonics won't be completely damped by flaring the ends, so they may need additional damping, which will lower output somewhat, so I'm thinking a lower tuned ML-TQWT may be a better alignment overall, though a bit larger:
L = 101"
SO = 200"^2
SL = 19.635"^2
zdriver = 6"
zport = 98.5"
Folded up, both the driver and vent cutout will be at floor level for max boundary gain. Sim shows minimal stuffing, so adding more further smooths it and rolls off the bottom end if it sounds too 'boomy' in-room.
GM
It may be OK, but the long vent's pipe harmonics won't be completely damped by flaring the ends, so they may need additional damping, which will lower output somewhat, so I'm thinking a lower tuned ML-TQWT may be a better alignment overall, though a bit larger:
L = 101"
SO = 200"^2
SL = 19.635"^2
zdriver = 6"
zport = 98.5"
Folded up, both the driver and vent cutout will be at floor level for max boundary gain. Sim shows minimal stuffing, so adding more further smooths it and rolls off the bottom end if it sounds too 'boomy' in-room.
GM
Attachments
greg_mcquaid said:s
Am i on the right track?
Thanks,
Greg
Hi,
Just my opinion but flat alignments can sound boomy, I like to tune
the ports lower than that that gives flattest response, but each to
there own - possibly get an adjustable port and try in situ.
/sreten.
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