Actually I found out down firing sub is more consistence in the db accross the sub freq response. I try to calibrate my Paradigm PDR-10 using my DD-12 manual tuning with mic. With front firing position, a slight changes of mic direction will see a dip of 3db. I put 3 door stopper and point my PDR-10 downwards and it solve this problem. The freq response is much better across the range from 30hz to 100hz. With an equalizer, I manage to tune my paradigm within 3db from 25hz to 100hz.

The crawling method is to find the best position to minimize peak and valley across the freq response of the bass. Because bass freq is very low, the cancellation of wave in the room is greater. You can easily hear the differences in bass if you walk around in your HT room. Even my Velodyne DD eq can't cater for certain freq if the placement is bad. If you have DD, it's very easy. Just place the sub at your listening position, turn on the freq sweep and use the mic at all possible position in your room. The graph that show the flatest would be the optimum location.

If your sub do not have a freq sweep graph, then you need to use your ears. The better way is to use SPL meter and play certain freq between 20hz to 100 hz and plot the graph for each location but took a long time to do. Remember, if you have eq in your sub, cut is always better than boost.

HornyAngMoh problem I believe is he is sitting in the valley of the sub sound. Move your sub in / out from the wall should shift your peak/valley around. If your coffee table is 3 ft from your position, the first thing to do is shift your sub out 3 feet. Try and see or should I say hear

This post has been edited by pierreye: Nov 7 2008, 11:47 AM

Wait until you watch Dark Knight. The bass is crazy. I think I developed permanent ear damage after watching 2 1/2 hours of batman .

May I ask where you find the ad for SPL-1200R for RM 4.6k? My friend might be interested. He kena "goreng" by my DD-12.

Keep in mind that sub can't be compare just based on specs. You need a sub with well controlled lower freq so that it wouldn't sound muddy. Normally ported sub is not as musical as fully sealed sub and placement would be more difficult.

Just redo my sub tuning and wish to share some tips. You need a sound meter to do the test.

1. If you measure a dip in crossover freq between your speaker and sub, most likely both speaker and and sub might be out of phase which cause cancellation. For example, if you cross your sub at 80hz, check out the region between 60hz to 100hz. If you see a dip here, try to turn the phase until you get a smoother integration.

2. If you can't tame that region, another way is try to move your sub in/out until you get a smoother integration.

3. Sometimes if you have a front firing sub, try to turn it into down firing (put 4 door stopper to raise your sub up).

If you can save profile then easy. Normally for movie, you want powerful boom with your sub so you can set the your sub +3 to 5 db higher. For music, you want a level as flat as possible. If your sub do not have profile saving features, another way is to use your amp sub level output. Most modern amp should let you set the level for each speaker including sub. Use your amp profile to save 2 settings, one for movie, another for music.

Service depends on the company. If I'm not wrong, some company might ask you to diagnose yourself which part is having problem. They will send the parts down for you to replace yourself so you save in transportation. For eg. recently I bought a pair of Axiom QS-8 surround speaker. Best part is free shipping for 3 biz day using Fedex. After 2 months, one of the driver is having problems (you can hear static sound for certain freq). The tech support just ask me to do some simple test and send a replacement within 7 days without asking me to return the defective driver. So this type of internet purchase is OK, much better than dealer support which sometimes take 1 month to return the unit.

If you got jalan, get a group buy and use shipping in container (which you can either buy half or full container load). Sometimes they have ways with custom to "ignore" tax.

This post has been edited by pierreye: May 18 2009, 09:23 AM

Can't comment on their whole set of AV system. I only get the QS8. I would say it worth the RM 2k. In the market, if you are going for branded bipole speaker easily will cost you min 4k and above. QS8 give me a better surround effect.

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Added on May 18, 2009, 4:25 pmYup. They help to pay first. Projection screen only 10% tax.

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Added on May 18, 2009, 4:29 pmSuppose to have tax but Fedex forgot to collect the tax from me . Replacement driver no tax as it is declare below USD 100. Anything below USD 100 will be no tax. I know most American company wouldn't under declared items value but if you get from HK or China, you can ask them to declare below USD 100. I previously get my Citypulse DAC with no tax from HK.

This post has been edited by pierreye: May 18 2009, 04:29 PM

If you seriously want a good sub, you need to spend at least min 5k and above. Those entry level sub normally can't produce clean bass and very deep low freq. If you looking at velodyne sub, I would say start with SPL series. Once you hear/feel how a better sub perform, you wouldn't satisfy with entry-sub.

One scene that my friends always blown away is star wars episode 2 on light saber duel. With a good sub, you can feel the low humming of the light saber.

This post has been edited by pierreye: May 20 2009, 09:32 AM