Question about Jl Audio 12W3 Car Subwoofer

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I want to know at what frequency to run this subwoofer

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Depends on what kind of music you like, however I wouldn't go too much above 100 Hz. I have one of these and I run my sub channel from my deck at 80 Hz. Subwoofers are meant to reproduce low frequency energy, anything else is just going to be dissipated as heat, which is bad.

Posted on Feb 03, 2010

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1 Answer

How do i set up my subwoofer sawm40


Sounds like you have a passive subwoofer, you run speaker wire from 'front speaker receiver out' to the subwoofer, the 'subwoofer out' to your front speakers. Seem like your sub has a crossover that grabs the bass frequencies and passes off the rest to the front speakers

If you have a 'subwoofer line out' on your reciever and a 'line in' on you subwoofer then just use that single wire, this would be for a powered sub. You know that you have a powered sub if your sub has a power cord attached to it.

Jan 23, 2012 | Sony Audio Players & Recorders

1 Answer

I have a sony HTDDW7600, i cannot get the dedicated subwoofer amp to work. The fan is running on it, but for some reason the only way i can get it to do anything is to unplug the cable that goes from the...


H?,
You have a very good system...one of the best of SONY..SUB does not get activated automatically especially on STEREO mode.DIRECT STEREO Notes • No sound will be output from the subwoofer.
.your system has Dedicated Power Amplifier for 2 Externally Driven Sub-Woofers (200W RMS x 2)..in order to activate the sub woofer amplifier you need to make a selection on the surround modes while you are switching the modes of the surround you will see the speaker position on the display of receiver as well..if you do not see the sub woofer it wont be activated..Sound Field Program (A.F.D) is a good example to test it..
Take care and please Remember to rate/vote and give me 4 Thumbs Up
for Helping out the Community :)

Hope this helps!

--------------------
Additionally please follow the instruction on your user manual to activate the SUB ,as is follows..

-----------------
BASS-OUT
Low-frequency (bass) signals can be directed to the
subwoofer and/or the front left and right speakers
according to the characteristics of your system. This
setting also determines the routing of the LFE (low-
frequency effect) signals found in Dolby Digital or DTS
sources.
Choices: SWFR (subwoofer), FRONT, BOTH
• Select SWFR if you connect a subwoofer. LFE and
low-frequency signals from other channels are directed
to the subwoofer according to the speaker settings.
• Select FRONT if you do not use a subwoofer. LFE and
low-frequency signals from other channels are directed
to the front speakers according to the speaker settings
(even if you have previously set the front speakers to
SML).
• Select BOTH if you connect a subwoofer and you want
to output low-frequency signals from front channels to
both the front speakers and subwoofer. LFE and low-
frequency signals from other channels are also directed
to the subwoofer according to the speaker settings. Use
this function to reinforce low-frequency signals using
the subwoofer when playing back sources such as CDs.

Jun 23, 2011 | Sony MUTEKI HTDDW1600 Theater System

1 Answer

I need to know the enclosure specs for the PSW615 alphasonik subwoofer... need volume for vented enclosure


Hello chetdyal,

For a ported enclosure with room for a port, you're going to need a box with about 3.0 CuFt internal volume. Using 3/4" material and outside dimensions, this translates into a box 25"(w)X18"(h)X15"(d) giving you 3.03 CuFt allowing a little volume for the sub and port displacement. For a tuned frequency of 38Hz, you'll need a rectangular port 2"X6" and 4.6" in length. A round or cylindrical port for the same tuning frequency would be 4" in diameter and 4.9" in length. Increasing the port length will lower the tuned frequency.

There's excellent volume and port calculators on The12v.com web site. I'd recommend that you browse some of the "box-building" information before you begin your build. The DIY Subwoofer site also has some great resources.

Keep in mind that a ported enclosure will tend to produce the loudest bass notes very close to the tuned frequency. So tune it higher or lower according to the music you will be playing.

Hope this helps.

Jun 08, 2009 | Alphasonik PSW615 Car Subwoofer

1 Answer

Subwoofer moving wrong way possibly causing damage!


Hey i'm no expert either but maybe just maybe your amp has a subsonic filter on it which cuts out the lowlow bass maybe check that and either disengage it or turn it all the way down if it even has one thats all i can think of unless you have a ported box and going below the boxes tuning frequency other than that im as stumped as you are-good luck with it

May 08, 2009 | Car Audio & Video

1 Answer

Low pass crossover


Low-pass crossover
Both sets of inputs sum the left and right channels together and the
resulting signal is passed through an adjustable low-pass crossover before
being amplified. The crossover control allows you to adjust the upper limit
of the subwoofer's frequency response from 40 to 120 Hz. The subwoofer's
response will begin rolling off above the frequency you set this control to.
You should set the crossover frequency to obtain a smooth and seamless
transition from the subwoofer to the main speakers in your system. If your
main speakers are smaller units with limited low frequency output, you
may wish to choose a higher frequency (such as 100-120Hz) than you
would with larger speakers which have greater low frequency output. With
larger speakers, you might start with this control set lower, such as 80Hz.

Jan 05, 2009 | Velodyne CHT-10 Subwoofer

1 Answer

Sleep mode


It will power off if the frequency range of the signal being sent to it is set too low, or the amplitude of the signal is too low as well.

Try increasing the subwoofer crossover frequency and/or increase the gain from the LFE/SUB of the receiver/preamp you have it connected to. Also make sure that in the setup menus of ALL of your components have an LFE channel enabled such as by selecting the output of source material of your DVD player for example, to output 5.1. Otherwise, it will not send a signal for the subwoofer to play, nor will it play the signal if the crossover frequency is set too low.

Example; the setting on your DVD player setup menu is set to two channel: result with only one exception, subwoofer will not play

Example; subwoofer/LFE level on receiver/preamp set to -10dB and/or subwoofer volume too low. Result: subwoofer will not play.

Example; subwoofer crossover point set at 35Hz. Source material playing sound at 30Hz and lower. Result: subwoofer will not play.

Nov 23, 2008 | JBL PB10 Subwoofer

2 Answers

Lost instructions


The 'Subwoofer' output on your receiver is used to connect to a powered subwoofer with a built in amplifier. Your KLH speakers use what is called a 'passive' subwoofer, it gets its power from the receiver and then passes the higher frequencies to the left and right front speakers after taking out the low frequencies for the subwoofer. A speaker system with a passive subwoofer is good for casual listening, but a powered subwoofer is required for really hearing low frequencies and rumble in movies. The KLH speakers you have were highly rated in their time for their price. The four satellite speakers and center channel speaker have very good sound compared to the little 'midget' surround sound speakers most people buy today.

Here's how you hook them up:

- The left and right front channels from your receiver terminals should go to the terminals on the subwoofer marked 'From Amplifier'
- Your left and right front speakers are then connected to the subwoofer terminals marked 'To Speakers', they do not connect directly to your receiver.
- Your center speaker is connected to your receiver terminals marked 'Center'
- Your rear speakers are connected to your receiver terminals marked 'Surround'

That should get you up and running. If the bass isn't good enough with the passive subwoofer, you can get a decent powered subwoofer like the Velodyne VX-10 for about $150 and 'kick it up a notch'. Good luck and enjoy....

Jan 07, 2008 | KLH HT-9900 System

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