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 JL Audio 12WX-4 subwoofer, Need opinions and reviews

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Quazacolt
post Jun 29 2011, 11:06 PM

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QUOTE(amjb76 @ Jun 29 2011, 09:22 PM)
Good luck mate! Ive always marvelled at ppl who are good in engineering smile.gif no wonder u are well verse in how amp works and other technical stuffs - it's sound very much Greek to me lol!

Btw just curious la how on earth I could feel the sub thumping at the front when it's actually installed at the back of the trunk?
*
go wiki and read up more on sound frequencies lol.
craziechild
post Jun 30 2011, 01:19 AM

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no need to go wiki...

you simply go on a tuning session until its there... biggrin.gif
Quazacolt
post Jun 30 2011, 01:21 AM

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QUOTE(craziechild @ Jun 30 2011, 01:19 AM)
no need to go wiki...

you simply go on a tuning session until its there... biggrin.gif
*
that works too biggrin.gif
TSamjb76
post Jun 30 2011, 06:54 AM

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QUOTE(Quazacolt @ Jun 29 2011, 11:06 PM)
go wiki and read up more on sound frequencies lol.
*
Read but still couldn't understand LOL - was rather hoping that someone could explain to me in lay man's term hehehe....


Added on June 30, 2011, 6:59 amAnd tuning session huh? Ah that one needs sifu and master Sifus to be around if go in alone sure koyak laugh.gif

This post has been edited by amjb76: Jun 30 2011, 06:59 AM
Quazacolt
post Jun 30 2011, 08:00 AM

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QUOTE(amjb76 @ Jun 30 2011, 06:54 AM)
Read but still couldn't understand LOL - was rather hoping that someone could explain to me in lay man's term hehehe....


Added on June 30, 2011, 6:59 amAnd tuning session huh? Ah that one needs sifu and master Sifus to be around if go in alone sure koyak laugh.gif
*
sub frequencies are omni direction lol, so unless the the settings/setup/tuning is done horribly wrong, placement of sub shouldn't be a matter as placing any direction would yield the same results. of course, dont go full retard and put it in places like your car engine, or for home audio, buried deep underground or something, common sense applicable here.
TSamjb76
post Jun 30 2011, 08:48 AM

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QUOTE(Quazacolt @ Jun 30 2011, 08:00 AM)
sub frequencies are omni direction lol, so unless the the settings/setup/tuning is done horribly wrong, placement of sub shouldn't be a matter as placing any direction would yield the same results. of course, dont go full retard and put it in places like your car engine, or for home audio, buried deep underground or something, common sense applicable here.
*
don't go full retard huh? laugh.gif that's one thing I like about the Sifus here. Very knowledgable and informative and u make it sound very simple smile.gif thanks!

zacisme
post Jun 30 2011, 10:06 AM

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QUOTE(amjb76 @ Jun 30 2011, 08:48 AM)
don't go full retard huh? laugh.gif that's one thing I like about the Sifus here. Very knowledgable and informative and u make it sound very simple smile.gif thanks!
*
yup, its omni, so it can be anywhere...
but how to create upfront bass?
The midbass is the key point biggrin.gif
The correct upfront bass is full strength bass reproduction
not just boomy congested at front, thats noise laugh.gif

TSamjb76
post Jun 30 2011, 10:20 AM

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QUOTE(zacisme @ Jun 30 2011, 10:06 AM)
yup, its omni, so it can be anywhere...
but how to create upfront bass?
The midbass is the key point  biggrin.gif
The correct upfront bass is full strength bass reproduction
not just boomy congested at front, thats noise  laugh.gif
*
Hahaha! Well said sifu Zack smile.gif I think my midbass is adequate already just need the sub base to make it whole n complete.

carcrazy
post Jun 30 2011, 10:54 AM

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QUOTE(Quazacolt @ Jun 30 2011, 08:00 AM)
sub frequencies are omni direction lol, so unless the the settings/setup/tuning is done horribly wrong, placement of sub shouldn't be a matter as placing any direction would yield the same results. of course, dont go full retard and put it in places like your car engine, or for home audio, buried deep underground or something, common sense applicable here.
*
i used to think placing the sub any direction doesnt matter as its low freq playin, so its omin like u said. but much later on i found out its NOT true in car environment.
u can experiment it urself, by moving the sub in the boot.
1. move to the middle of the boot
2. move towards left
3. move towards right
4. change firing sub direction

*u'll will be surprise wif the results attain!!
try it and have fun icing

note: this exercise is NOT for normal consumer as their mind set is about practicality(max boot space). nothing wrong wif that.
this is only for enthusiast, as their mindset is about maximizing SQ in their system, main priority..
craziechild
post Jun 30 2011, 11:00 AM

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QUOTE(carcrazy @ Jun 30 2011, 10:54 AM)
i used to think placing the sub any direction doesnt matter as its low freq playin, so its omin like u said. but much later on i found out its NOT true in car environment.
u can experiment it urself, by moving the sub in the boot.
1. move to the middle of the boot
2. move towards left
3. move towards right
4. change firing sub direction

*u'll will be surprise wif the results attain!!
try it and have fun icing

note: this exercise is NOT for normal consumer as their mind set is about practicality(max boot space). nothing wrong wif that.
this is only for enthusiast, as their mindset is about maximizing SQ in their system, main priority..
*
+1
carcrazy
post Jun 30 2011, 12:36 PM

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further improved sub bass quality at boot area:
1.Dampen boot thoroughly, preferably wif heat gun for maximum effect
2. Seal off all gaps and holes wif sika silicone pump gun
3. Fill up all cavities wif semi hard foam + waterproof
All can de done diy but need a bit of effort and time
zennn
post Jun 30 2011, 12:58 PM

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QUOTE(amjb76 @ Jun 29 2011, 09:22 PM)
Btw just curious la how on earth I could feel the sub thumping at the front when it's actually installed at the back of the trunk?
*
when talking about sub bass its actually about feeling the vibrations, not hearing the sound. so there are several things u can do and other factor that help or hinder getting upfront bass.

one way is to permanently mount sub box directly onto chassis (screwed onto the metal at the trunk)

can also play with your phase (switch around +ve and -ve terminals) but sometimes u get upfront bass and lose the kick or dynamics

important to get good mid bass from your mids, and tune the mid high pass together with sub low pass so they blend well together

well built sub box also helps. also some subs are a bit more transparent than others, makes it easier to get upfront bass.

This post has been edited by zennn: Jun 30 2011, 01:01 PM
TSamjb76
post Jun 30 2011, 03:34 PM

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QUOTE(zennn @ Jun 30 2011, 12:58 PM)
when talking about sub bass its actually about feeling the vibrations, not hearing the sound.  so there are several things u can do and other factor that help or hinder getting upfront bass.

one way is to permanently mount sub box directly onto chassis (screwed onto the metal at the trunk)

can also play with your phase (switch around +ve and -ve terminals) but sometimes u get upfront bass and lose the kick or dynamics

important to get good mid bass from your mids, and tune the mid high pass together with sub low pass so they blend well together

well built sub box also helps.  also some subs are a bit more transparent than others, makes it easier to get upfront bass.
*
hmm.gif bro in your expert opinion, with my current settings can the above be achieved? i.e. no processor / electronic x-over / HU with time correction and all???
craziechild
post Jun 30 2011, 05:51 PM

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it can be achieve... smile.gif

if your installations was top notch... then basically its just gain level matching, freq adjustments and also phase switching. until you get that sweet spot- bass from front, dynamism, and also kick...
TSamjb76
post Jun 30 2011, 07:29 PM

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QUOTE(craziechild @ Jun 30 2011, 05:51 PM)
it can be achieve... smile.gif

if your installations was top notch... then basically its just gain level matching, freq adjustments and also phase switching. until you get that sweet spot- bass from front, dynamism, and also kick...
*
Thanks bro smile.gif we should have a tt session when bafukie is next back in jb - 2nd half of July I think.

cheers.gif
Quazacolt
post Jun 30 2011, 08:57 PM

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QUOTE(amjb76 @ Jun 30 2011, 08:48 AM)
don't go full retard huh? laugh.gif that's one thing I like about the Sifus here. Very knowledgable and informative and u make it sound very simple smile.gif thanks!
*
well it can get complicated and theres more to it on sound frequencies especially even if you just read the wiki/google information without thorough in depth research.

but, you wanted simple terms and answers, and thats as simple as it gets smile.gif


Added on June 30, 2011, 9:00 pm
QUOTE(carcrazy @ Jun 30 2011, 10:54 AM)
i used to think placing the sub any direction doesnt matter as its low freq playin, so its omin like u said. but much later on i found out its NOT true in car environment.
u can experiment it urself, by moving the sub in the boot.
1. move to the middle of the boot
2. move towards left
3. move towards right
4. change firing sub direction

*u'll will be surprise wif the results attain!!
try it and have fun icing

note: this exercise is NOT for normal consumer as their mind set is about practicality(max boot space). nothing wrong wif that.
this is only for enthusiast, as their mindset is about maximizing SQ in their system, main priority..
*
well, obviously placing subs in different manner, and not just "generally" your trunk/boot space, would yield a different result. perhaps i should've rephrased my answer better.

that said, amjb wanted a simple answer, and thats as simple as it can get imo.


Added on June 30, 2011, 9:02 pm
QUOTE(zennn @ Jun 30 2011, 12:58 PM)
when talking about sub bass its actually about feeling the vibrations, not hearing the sound.  so there are several things u can do and other factor that help or hinder getting upfront bass.

one way is to permanently mount sub box directly onto chassis (screwed onto the metal at the trunk)

can also play with your phase (switch around +ve and -ve terminals) but sometimes u get upfront bass and lose the kick or dynamics

important to get good mid bass from your mids, and tune the mid high pass together with sub low pass so they blend well together

well built sub box also helps.  also some subs are a bit more transparent than others, makes it easier to get upfront bass.
*
i personally dont think its just vibrations as the human hear "spec wise" can listen to a good length of "sub" frequencies.

how else are we able to differentiate a good solid bass thump vs a loosened/muddied bass?


Added on June 30, 2011, 9:05 pm
QUOTE(amjb76 @ Jun 30 2011, 07:29 PM)
Thanks bro smile.gif we should have a tt session when bafukie is next back in jb - 2nd half of July I think.

cheers.gif
*
ala why JB not KL lol

This post has been edited by Quazacolt: Jun 30 2011, 09:05 PM
craziechild
post Jul 1 2011, 01:51 AM

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the "sub bass" you heard is actually more of the super-positioned waveform of the mid-bass...

those punches you feel on your chest, thats the real sub bass... smile.gif

while brings it to the point why overlapping the lpf of the sub and the hpf of the mids are usually recommended... because you need them to but playing some freq together to achieve the natural phenomenon of super-position. smile.gif

and understanding this would also explains why dynamism and kick sorta be compromised when you flip the polarity. smile.gif

This post has been edited by craziechild: Jul 1 2011, 01:52 AM
TSamjb76
post Jul 1 2011, 08:22 AM

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QUOTE(Quazacolt @ Jun 30 2011, 08:57 PM)
well it can get complicated and theres more to it on sound frequencies especially even if you just read the wiki/google information without thorough in depth research.

but, you wanted simple terms and answers, and thats as simple as it gets smile.gif


Added on June 30, 2011, 9:00 pm

well, obviously placing subs in different manner, and not just "generally" your trunk/boot space, would yield a different result. perhaps i should've rephrased my answer better.

that said, amjb wanted a simple answer, and thats as simple as it can get imo.


Added on June 30, 2011, 9:02 pm

i personally dont think its just vibrations as the human hear "spec wise" can listen to a good length of "sub" frequencies.

how else are we able to differentiate a good solid bass thump vs a loosened/muddied bass?


Added on June 30, 2011, 9:05 pm

ala why JB not KL lol
*
rclxms.gif come down to JB la bro and we can all have the tt session here

why JB? cos we all are staying here laugh.gif


Added on July 1, 2011, 8:23 am
QUOTE(craziechild @ Jul 1 2011, 01:51 AM)
the "sub bass" you heard is actually more of the super-positioned waveform of the mid-bass...

those punches you feel on your chest, thats the real sub bass... smile.gif

while brings it to the point why overlapping the lpf of the sub and the hpf of the mids are usually recommended... because you need them to but playing some freq together to achieve the natural phenomenon of super-position. smile.gif

and understanding this would also explains why dynamism and kick sorta be compromised when you flip the polarity. smile.gif
*
I see.... wow! you should open up your own accessory shop bro - sure laku notworthy.gif

This post has been edited by amjb76: Jul 1 2011, 08:23 AM
bafukie
post Jul 1 2011, 09:43 AM

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come come come.... we straight go audit to understand. Nothing beats listening to a system. smile.gif
TSamjb76
post Jul 1 2011, 10:56 AM

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QUOTE(bafukie @ Jul 1 2011, 09:43 AM)
come come come.... we straight go audit to understand. Nothing beats listening to a system. smile.gif
*
Hear! Hear! rclxm9.gif

but we are all waiting for your to come back with your ride bro - so can audit the p99 notworthy.gif

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