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Re: Subs EP400-300
Rustolem #372585 04/08/12 07:33 PM
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I wonder if I could upgrade my 350 to a 500 by replacing just the speaker and the amp? I doubt if it's that easy, but it sure would be nice not to have to replace the cost of the cabinet too. I'm assuming there is some difference in the speakers between the 2.

Re: Subs EP400-300
Rustolem #372586 04/08/12 07:37 PM
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The cabinet's somewhat different, since the 350 amp is much smaller than the 500. So at least the plastic boot would have to be changed.


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Re: Subs EP400-300
Rustolem #372599 04/08/12 08:49 PM
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Sorry about the title I mean to say 350-400..
As for me I was looking at the 350, for somebody that is not to knowledgeable I thought it would enough for me, and I can just set the crossover setting with the Yamaha..
As for placement I had this problem with my last Polk sub was that it was next to my left front tower and never really heard it all that well except when I got up to leave the room all of a sudden there was "sub".
So for this one I was thinking about to the right of my sitting position about 6 feet away in the corner.

Thanks


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Re: Subs EP400-300
Rustolem #372605 04/08/12 09:10 PM
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you will have to experiment with sub placement, all rooms are different. I would recomment the "crawl" test. Place the sub in the location where you will be sitting, put on some good low bass tracks, crawl around the perimeter of the room and listen for the best overall location where it is not to BOOOOMY or One Note Bass sounding, then just switch the sub and you back to the seat.


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Re: Subs EP400-300
Rustolem #372606 04/08/12 09:19 PM
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Originally Posted By: Rustolem
Sorry about the title I mean to say 350-400..
As for me I was looking at the 350, for somebody that is not to knowledgeable I thought it would enough for me, and I can just set the crossover setting with the Yamaha..
As for placement I had this problem with my last Polk sub was that it was next to my left front tower and never really heard it all that well except when I got up to leave the room all of a sudden there was "sub".
So for this one I was thinking about to the right of my sitting position about 6 feet away in the corner.

Thanks


What you are describing with your present sub is room modes - peaks and dips in the response. Basically the sub wasn't placed in the optimal spot for your listening position and you were sitting in a "null". This is all fixable.

So when your waiting for your new subwoofer, google the terms "subwoofer crawl" in the search engine and read about it. This will help you in providing the best placement and extracting the best performance of your new investment.


I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

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Re: Subs EP400-300
BlueJays1 #372617 04/08/12 10:26 PM
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Originally Posted By: BlueJays1
Originally Posted By: Rustolem
Sorry about the title I mean to say 350-400..
As for me I was looking at the 350, for somebody that is not to knowledgeable I thought it would enough for me, and I can just set the crossover setting with the Yamaha..
As for placement I had this problem with my last Polk sub was that it was next to my left front tower and never really heard it all that well except when I got up to leave the room all of a sudden there was "sub".
So for this one I was thinking about to the right of my sitting position about 6 feet away in the corner.

Thanks


What you are describing with your present sub is room modes - peaks and dips in the response. Basically the sub wasn't placed in the optimal spot for your listening position and you were sitting in a "null". This is all fixable.

So when your waiting for your new subwoofer, google the terms "subwoofer crawl" in the search engine and read about it. This will help you in providing the best placement and extracting the best performance of your new investment.

Yeah have read all about the "sub crawl" but physically not able to do which is also why I can't go out and "audition" speakers and have to rely on online user info and reviews.
As for placement I think in that corner is going to be best if it were up front it would be a good 14 feet away from me.

Thanks


Mits WD-92840
Sony BDP-CX960
Yamaha RX-A3000
Axiomv3 M80's,VP180,QS8s
HSU VTF-3MK4 Sub
PanamaxM5400
Re: Subs EP400-300
Rustolem #372618 04/08/12 10:58 PM
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a couple of things that can work quite well if you can't do the sub crawl and you don't want to sit in a null;

put the sub something like one third off the side wall at the front, and just a few inches away from the front wall. you should see an illustration of this if you check at the address below this message. i had to do this, and not the sub crawl, as i could not move the sub easily enough; my sub's frequency resp. is very flat and i cannot detect the changeover from front speakers to the sub. the integration is excellent.

next, have your LP (your ears) at around 38% (of the length of the room) from the back wall; or if you have a large room: from the front wall.

when done, carefully run your Audyssey or MCACC or whatever calibration program you have.

Last edited by J. B.; 04/08/12 11:00 PM.
Re: Subs EP400-300
Rustolem #372620 04/08/12 11:35 PM
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My observations on the EP350 vs 400 based on listning to both at Axiom.

The EP400 has more output than the 350. In Axiom's listening room, the EP400 was still overpowering at its 1/4 setting on the volume dial vs the EP350 sounding good at 1/2. Since the two were on the same channel, the voltage out of the receiver was the same. That room was 12'x20'x8' (1,920 cf)

According to the specs it also plays lower with a -3db point of 18Hz, vs 28 for the EP350. You will notice the difference in movies like Terminator3, Transformers etc. where there is a lot of LFE.

I see from the tech specs, the 350 may have a -3db point of 18Hz. Based on my experience in my concrete slab appartment I would say that is the absolute best case. My 350 is flat to 21Hz and then output falls off steeply, so I may hit that point, but I have no low frequency loss through my walls (concrete does not flex).


Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!
Re: Subs EP400-300
J. B. #372621 04/08/12 11:42 PM
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Originally Posted By: J. B.
a couple of things that can work quite well if you can't do the sub crawl and you don't want to sit in a null;



or, you could buy 4 subs... and have the best of all worlds.

http://www.youtube.com/watch?v=ayOXz26qm3I

Re: Subs EP400-300
fredk #372627 04/09/12 03:02 AM
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Originally Posted By: fredk

The EP400 has more output than the 350. In Axiom's listening room, the EP400 was still overpowering at its 1/4 setting on the volume dial vs the EP350 sounding good at 1/2. Since the two were on the same channel, the voltage out of the receiver was the same. That room was 12'x20'x8' (1,920 cf)


My experience in my home was different than yours. The little EP400 couldn't give me any shake or feel while watching movies and the EP350 easily did the job. I have always thought of the EP400 as a music only sub or one for very small rooms.


Jason
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