http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/ Engadget Comments for Tymphany's LAT250 subwoofer: smaller than you'd think http://www.engadget.com/media/feedlogo.gif http://www.engadget.com en-us Copyright 2009 Weblogs, Inc. The contents of this feed are available for non-commercial use only. Blogsmith http://www.blogsmith.com/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/A cheap sub will sound better in a properly designed enclosure than a larger/more powerful sub in a crappy enclosure.

As for space requirements... Bose, SONY and a number of other companies offer speakers you can install in the wall so you should look there first. My home theater came with a sub and my Xbox360 sits atop it (vertically) mostly out of sight.]]>Dec 10th 2007 7:59AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 8:10AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 8:10AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 8:00AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 8:12AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
At least they gave the power in RMS instead of trying to make it sound better by using PMPO.]]>Dec 10th 2007 8:16AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
The problems with any multi-driver array come on several fronts. Multiple drivers create an opportunity for both temporal displacements of driver movement (not exactly in physical synch). Even if the drivers are connected to the same motor there will be physical effects at certain frequencies caused by harmonics, boundary effect, etc. Think of waves meeting in the middle of a lake and creating a sum which is greater than their different parts. The driver(s) meet this waves as a physical force and distort slightly (and differently) trying to overcome them. In typical driver/small sub configurations this is overcome by running the drivers out of phase to try and cancel out the effects.

Combing noise is caused by overlaps in sound waves typically near the edge of the drivers or in this case the vents. You get small cancelations in sound from out of phase waves and re-inforcement from others. This is very similar to the distortion effects created earlier but the waves have escaped the box at this point. To minimize this you typically place the drivers at or above the box surface to minimize these diffraction effects and far apart to minimize straight combing.

Vent noise will be a similar but much lesser problem in this type of setup. Typically subwoofers have nice flared vents to overcome the woosh noise or huffing caused by the air moving past the vents. The only other way to overcome this is to make the vent so large relative to the amount of air moving past it but this eliminates the tuning effect of the vent (and probably the box to a large degree).

In any case this is probably aimed more at the bose crowd.
]]>Dec 10th 2007 8:41AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
Plus, I bet most of these will be installed under seats and in trunks...]]>Dec 10th 2007 10:17AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
Having said that: Combing and distortion will always be an issue, it does not matter what environment you use. Its like saying bose speakers sound better in your bathroom than your living room. (they don't). I guess if you don't care, then it doesn't matter. Putting a speaker in your trunk is about being loud for everyone else, its not about quality sound.]]>Dec 10th 2007 11:42AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
I wonder how this little sub would perform in a car instead of a home theater. It could be a great option to use if you didn't want to use something as large as the PLV-7.]]>Dec 10th 2007 8:53AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 9:28AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/
The only people that should these are people who really want to save space and own tiny speakers that aren't able to go down to 100hz.]]>Dec 10th 2007 10:17AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 11:31AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.caraudiomag.com/testreports/0702_cae_alpine_plv_7_subwoofer/index.html

the bigger brother is serious bzns]]>Dec 10th 2007 11:40AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.tymphany.com/datasheet/printview.php?id=139

bad ass. has anyone ever used or heard the alpine? that review was sure good...
]]>Dec 10th 2007 11:55AMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 1:25PMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Nominal impedance
Zn
2
ohm
Minimum impedance
Zmin
2.1
ohm
Maximum impedance
Zo
8.4
ohm
DC resistance
Re
2
ohm
T-S Parameters
Resonance Frequency
fs
60
Hz
Mechanical Q factor
Qms
3.4

Electrical Q factor
Qes
1

Total Q factor
Qts
0.79

Force factor
Bl
5.6
Tm
Mechanical resistance
Rms
4.9
Kg/s
Moving mass
Mms
44
g
Suspension compliance
Cms
0.16
mm/N
Effective cone diameter
D
15.8
cm
Effective piston area
Sd
196
cm2
Equivalent volume
Vas
8.9
ltrs
Sensitivity (2.83V/1m)

90.5
dB
Sensitivity (1W/1m)

84.5
dB
Ratio BL/√(Re)

4

Ratio fs/Qts
F
76

Power handling
Rated Noise Power (IEC 18.1)
100
W
Misc. Parameters
Effective Frequency range (IEC 21.2)
50-300
Hz
Frame dimensions
260x90
mm
Total Mass
845
grams
Frequency at ka=2
1518
Hz
]]>Dec 10th 2007 4:15PMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 4:26PMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 10th 2007 4:55PMhttp://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/http://www.engadget.com/2007/12/10/tymphanys-lat250-subwoofer-smaller-than-youd-think/Dec 20th 2007 8:22AM