I suspect you didn't use a RCA Y adapter to connect your sub RCA.

Get this



and try it..

Acording to some expert, if you only plug one left channel, only 70% utilization.....

You are right,

I didnt notice the other end... thanks for pointing that out.

Should be this one...

Bro,

You see the pic I posted here.


The white and red go to your sub left and right. your current RCA go to the other black end. Simple. I guess now you only use the left channel yeah. If you use the right channel lagi teruk, only 30% perhaps. So use both channel ok.

I audition the denon unit before. I notice it doesn't really have the juice to crank the MA RS6. Not sure what the max vol but the guy turn until -6 and still I feel not loud enuf. But the sound of denon is nice and warm. I guess it can be still adjust at speaker level and I suspect the MA RS6 need lots of power drive it open.. la la la. MHO only.

This post has been edited by tracktion3: Oct 16 2009, 05:36 PM

Bro,
according to the link you attached,

Rogers Sub

From this link, I could see:
1. Input from preamp left and right
2. High level input from amp

Did you use 1 or 2?

If you use 2, no wonder no power. I guess I know why, because the manual show like that. But using 2nd connection is like using your amp from your denon to power the sub. your sub is an active sub, since you use sub out RCA from your amp, shouldnt you be using the pre amp input in 1?

And I saw there is left and right on the preamp cable? this is where you use the RCA Y adapter.

p/s MA is Monitor Audio brand RS6 is the model. DSP.. Digital Signal Processing.

other sifu, correct me if I'm wrong. This Roger user manual is not user friendly enuf,

This post has been edited by tracktion3: Oct 18 2009, 12:23 AM

You use no 2? Thats where your problem is. Without the RCA Y adapter, you will get tremendous result. But I suggest, get the Y cable to have 100% capability.

If the drawing the same as the one you attached, everyone I mean everyone will get confuse...

Let us know how it turn out. and btw, you might one to lower down the level before you test ok... ha ha you are at 12db now remember...

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Added on October 21, 2009, 10:41 pmBro alex,
Any update? I'm curious to know. Thanks

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Added on October 21, 2009, 10:50 pmany update bro alex?

This post has been edited by tracktion3: Oct 21 2009, 10:50 PM

You dont need the Y-RCA cable. It shows here that you already has the dedicated Sub Woofer input from your denon. Dont understand why you said still not enuf power.

Audio CD?

When you play Audio CD, use the direct mode.Not sure if Denon 1909 got pure direct or not. Usually at this mode, your sub will not be utilized. I dont think we need sub when play audio CD. Just stereo will do providing your stereo speaker could play full range. Some AVR can use sub as well in the direct mode. But my Yammy 465 cant. And I read from some expert review.... we dont need it. There if now LFE in Audio CD. Other sifu here may be able to help. LFE usually for movies only.

I dont think there going to be any diffrent if you use the L/R channel or dedicated sub input at your sub.

my 2 cents of input.....

Equalizer, the name it self tell us that we need to equalized something. In this case, "To Equalized" the sound so when it arrive on our ear, they arrive equally. When I was young, always like to boost the base and treble and it look like a bath tub. How naive I was. But what actually I'm doing is to get the frequency flat from all band. Good speaker, player, amp and cable will not change the flatness of the graph even when we increase the volume. But very difficult because another factory is hard to control is the room. Lots of reflections which can cause cancellation etc.

When you run Audessey, it will auto tune ( +EQ) each of the speaker and to get the best result base on the room environment. This is hard to do and for those sifu who got the ear of a bat can perhaps tune manually, providing your EQ come with great octave spread.

There are enthusiast that will get everything into perfection including room, cable and of course the hardware and software. This is expensive. So our AVR is consider "far away" from enthusiast who use tube, valve, turn table etc.

So, if you ask me, let your AVR do the tuning. The only area that you should play is the Xover. I suggest around 90hz but it depends on your setting. My apartment is pretty small around 18'x20' living room. So, base on some study, this will create a hump at 90 hz. So, I cross at 80hz for my sub and 100hz at my AVR. It looks like a gap right? Well no, the gap will tone down the 90hz hump and create a balance. I study my Wharfedale 9.1. As matter a fact, it has a bump around 90hz. A trick that the UK folks do to give a somehow good bass. But it depends on design. Many enthusiast don't like that. Speakers should produce flat freq respond as flat as possible. I own a pair of ESI 05 nearfield active Speaker. They produce a pretty flat freq respond. Sound On Sound magazine rated these active speaker a high mark.

So you see, in order to play with EQ, so many factor need to consider. The best is, you need a tool to do that. There is a tread here where sifu and enthusiast measure there freq respond and they own a tool to do that. Amazing result some of them discovered.

There you go... my humble opinion....

Hmmm first you need to know what is Crossover. Well with the name, is like crossing over to somehwere...

Well, is there is a speaker ( one speaker) that can play all the frequencies flat at any volume, that will be hack of a speaker.... but unfortunately no, there is no such speaker. Even the Horn type got some weaknesses...

So in order to get the frequency to be played nicely in a speaker, a diffrent type of size, material, technology etc etc been created. Even the Xover has diffrent design whether it is 24octv or 12octv. Google around and you get the technical answers.

To make things simple, so you see a set of speaker consist of a tweeter, a mid and than a sub. All these 3 are dedicated to play some certain freq. So, in order for them to recieved only a dedicated freq as mentioned, a cross over is required to pass the right freq to the right speaker. Even inside the bookshelf speakers got a cross over inside to make sude the freq devided to the tweet and mid.

Your sub woofer as per the pic attached has "low pass" which is actually a Xover. Which allow the lower freq you set to pass and anything higher than that will be block. There is a few more setting like Q etc etc, but that is to details to explain here. Google to get them.

As I mention, my room somehow cause some increase ( hump) at the 90hz freq. So it look like a camel back you know. In order to tame this hump and make it flat, I have to xover at 80 for my sub and 100hz at my AVR. So graphically this is what it represent:



Is not exacly the same, but just to make you get the point. More of this related to room acoustic and again... if you dont have a dedicated room... just leave this alone. Or.. if you want to be an enthusiast, start reading more.. ha ha ha, is good for yah and may help you to sleep if you have trouble sleeping.

Here is a good site to start
http://www.linkwitzlab.com/rooms.htm


this is my Wharefdale Diamond 9.1 Freq respond chart...



Notice the hump at about 100hz about 5db? couple with my room effect, my bass sound really boomy which I dislike. So, cross them at 80hz sub and 100hz avr could solve this problem. But I just use my ear. Dont have the equipment to measure them.





This post has been edited by tracktion3: Oct 23 2009, 03:00 PM