40Hz and below!! most cars will not be able to feel that sub-bass region.
Why?
speakers energy translates to vibration on body panel and to heat!!..
even the sub-box is NOT heavy enough to produce that freq.

Yes! its still possible to produce low sub-bass region.
How?
1. Fully damp including roof (RM3K++above)
2. foam all the hollow pillars and etc.. (RM1K++above)
3. Lock down the sub enclosure' preferably with weight on it
4. Sub can play 33Hz below well.. large sub with vented enclosure(min 2.2cbft above)
- 15" or 18" has much larger surface area. Hence able to push the air gently NOT violently like a 10" or 12". 8" only good for midrange.. (juz kidding)
5. use a min 10awg sub cable. Forget about that RM0.50 cents terminal cup. Its a disaster!!!
6. use HDF unstead of MDF. Much stronger and denser!!
7. Use wood glue + internal bracing for sub enclosure. Finish off with a 2" nail above into the panel.
8. Use a combo 25mm+19mm HDF on the front panel at least!!
9. Change alternator to 120amps above with extra 4awg power and grounding cable.
10. Rear deck cut a bigger ventilation hole + heavily damped it. Preferably 1/3 air can come into the cabin from the boot!!

Have fun!! do all the above your car will be one of its kind. Not even a JLW7 or velodyne plug-and-play type(without doing any of the above) can compete with all the customization job above.
Thats serious ICER!! who seeks the best NOT juz buy the best drivers
Best drivers + well thought off customized job = very different from mass market cars
*applicable not juz to sub but to all other hardware and components!!

RM5K can get a very decent premium SQ items lor if excluding HU
Recommended the following:
Setup 1
Mcintosh 4ch amp
Vifa 2-way or Focal 165KF or Focal K2P UV

Setup 2
Luxman 2ch amp
Vifa 2-way or Mcintosh 2-way or Focal 165KF or Focal K2P UV

Either one is RM5k thereabout.

Cant go wrong with the stuff above.

Put your self in the manufacturer's shoes, do you wann to target mass market or niche market?
Mass market will have better volume.
Niche market will be otherwise.

Analogy to this, Cd's like Black Eye Peas(generic CD) Vs Dianna Krall(audiophile CD) which has better sales world wide?
If you are into the music business, and you have a choice to get either one record license to sell/distribute in South East Asia, which would you choose?

So there's no really bad amp for anybody. If an A person can afford a RM3K amp, so thats a good amp for him/her.
If B person can only afford a RM300 amp, thats a good amp for him/her too.

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If one were to be a pure seeker in high-fidelity hifi system, the person would buy the best amp, best HU, best speakers and etc...
Having a RM30K amp, RM20K HU, RM30K speakers and etc... + superb tuning/installation skills, would you be able to achieve 'audio nirvana' ?
Some might be happy some might not. It depends on the maturity level or exposure to music.
Ex: when I was young, I never like Bittergourd but now as I crazed for Bittergourd cook with chicken.. nice:)

Please dont be confuse here, I'm not saying that a RM30K speakers will NOT sound good whereas a RM2K speaker will sound better.

I still believe having the best hardware to achieve 'audio nirvana'. But then again having the best hardware + superb tuning/installation skills still will NOT be able to achieve but with better hardware it makes life a little easier.
Why?
-cause to build a hi-end system is NEVER about plug-and-play.
To me in my opinion and pls dun flame me, the route is 'customized' setup.
Ex: Some people like to use the word customized sub box by juz building one enclosure and expect to get it right cause they based on manufacturer's recommendation or using winISd.
Those are just theoretically values which can be accurate, but NOT optimum!!!
Why NOT build 4-10 different enclosure and you might juz get the sub sound even better!!..

Let talk more about a RM20K amp/HU, is it the best amp/HU? Well it could be as compared with the rest. But is it the best amp for the music?
Most probably NOT!!
It could have a very good amp topology design, but fail to have premium parts in it.
Example -
Why still use an opamps where a discrete HDRam are much better
Why use a normal transformer where a pure silver toroidal is even better
Why still use a thin aluminium heat sink+ chasis wher a thick solid aluminium block CNC machined out is even better for lower floor noise
Why the amp chassis go 'zing' when we run our finger across the chassis/heatsink where this is what we would hear when its amplified
Why still use a PCB board design where as point-to-point soldering can improved the sound to a few notches up
Why still use carbon potentiometer for volume attenuation where using a single high quality resistor in series with the signal and there is only one switch contact with multiple series resistor tap is better
Why still used the generic switching power supply where it is known to generate 'noise'
and etc...

I guess the reason for the above is cost. A pure silver toroidal transformer can cost up to a brand new honda accord. A block of Alumimium CNC machined out just for a single amp, will cost several thousand of dollars
So in conclusion to me at least, a RM20K amp/HU is still far away from achieving 'audio nirvana'...

The above statement is strictly based on my personal opinion and as you know music is always subjective to different people.
Analogy to this- If A person were to drive a Evo9 he/she would like to hang out with all the crazy car mods guys as we have the same level of interest/exposure/goals BUT you can never expect B person who believe in pump and drive to mix with them. Hence different opinion!!...

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Added on January 21, 2010, 3:16 amTo me if you wann near close to perfection install job, an analogy is like this:
Send the car for a premium aftermarket paint job.
Was quoted RM4K for the job. This particular owner is very fussy about everything and he has and 'eye' for paint works.
So if you were to sent to a premium body shop, bare in mind that there will be stages in doing the job.
1. Mudguard/Body knocking to rectify irregular surface - A guy doing it
2. Boh lai and then sanding it down to flat perfect surface - B guy doing it
3. Primer/Basecoat/Clear coat spray - C guy doing it
4. Compounding/Polish to remove surface imperfections - D guy doing it(probably bangla/mynmmar)

Highest paid worker generally will be A,B,C guy.
But overall there's always a main guy(sifu/boss) to supervise overall job or even hands-on on certain areas.

So if this owner wanns near perfection job, I recommended to him that only the so-called 'sifu' should do the whole entire process of the new paint job. No one else should help or touch the car.
That way you can rest assured a quality premium job.
But be prepare to pay extra + more time needed to finish such high premium expectation job.

Conclusion, the owner is nice guy. He juz wanns a peace of mind and job to be done professionally. He understand the whole thing, and without hesitation he juz ask how much more for the 'sifu' to do my car


This post has been edited by carcrazy: Jan 21 2010, 03:16 AM

by just changing an aftermarket speakers + amp will NOT yield satisfactory results. but will be better as compared to stock. using OEM HU can still achieve desirable results with certain mods and add-ons

good reliable top of the range amp!!
ur in luck!!
i have a superb used unit in superb mint conditon Helix A2 competition amp. only for RM1.8K cash
condition like new and the original plastic on top of the acrylic is still there. so rest assured no scratches on the top panel..
new locally, easily going for RM8K+/-
150RMS X 2, lots of headroom!!
made in germany...nice

*pic above is NOT the actual unit. u can come to my showroom to view the actual unit
call 0122962799 victor, for fast reply

This post has been edited by carcrazy: Apr 30 2011, 05:49 PM

the customer carry it back from US. he bought it cheaper than local selling price. so at RM1.8K used in mint cond, its a good deal. hurry only 1unit left. he actually has 2unit. the other sold oredy. the unit is in my showroom!

reason for sale: bought 2 unit of luxman CM amp(zero negative feedback topology design) from audio creations

*pic above is for illustration only

small boot space better dun use this design. end up NO boot at all..

i also have a used genesis Dual mono amp for sale. same price at RM1.8K only.
others to consider, TRU Billet B475,B2100 used unit

at audio creations, you can find a lot of premium brands at affordable price. we dun sell chap ayam brands nor do we carry any of them!! nice..

a few variables to look at why sub blew:
1. Amp sending clip signals to sub, hence vc overheated
2. Amp has a dc current leakage
3. maybe this particular model sub is not meant for spl output, hence over-excursion
And etc...need to see the actual setup to diagnose further as there many variables to consider

also NOT to forget another premium HU


* copper chassis
* 24bit burr brown PCM1704 DAC (famous in home hifi DAC, same DAC chip used in mcIntosh MDA5000)
* 6N Pure silver RCA preout

for more info:
http://www.alphaaudio.co.jp/usa/denon_web/dct-z1/dct-z1.html

we have used unit in good cond. going for only RM3.8K(comes with ori box) special pricing. new was RM8800

Its urs..give u brother price

I got a polkaudio used unit in good cond. Cheap cheap onli rm380
Reason for sale- customer upgraded to 3way scans revelator

or u can oso consider this
Focal 130A1 5.25" component set.
special clearing price, local set RM550 (brand new)
Lau chap price for u..yummy

click for more info
http://www.focal.com/en/car-audio-sound/ha...e-es/130-a1.php


This post has been edited by carcrazy: Apr 10 2012, 12:37 PM

componenet speakers
rm300, rm500, rm800, rm1000 and etc... all yield a diff sounding for a component speaker assuming the price bought is the accurate market selling price but not a samurai price.
in general speakers range from rm300-rm500 is usually local/china brand as premium international brand would not be possible at dat price.
they will still do justice to the system as its still consider an upgrade from stock system.

price range from rm800-rm1300 in general would satisfy most user. at this range it makes more sense to get a premium international brand as opposed to a local/china brand.

at rm2k - rm8k n above, in general is for user looking to build a good sounding system close to audio nirvana. they r not looking for an upgrade from stock system.

aiyor...been busy building a speaker cabinet for u n quaza, using Etons(germany made drivers) since both of u alwiz said never audit Eton before!!

internal bracing structure

* now on finishing stage


so wat kind of hardware u wanna listen to?
demo rig:
HU(must be less than RM1K)
amp(must be less than RM1.5K)

mcIntosh of coz...hehe
but it doesnt fits the pricing criteria

whic range of Focal u wanna listen to?
planning to build another car audio demo speakers using Focal