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#319995 - 08/25/10 05:58 PM Re: whats going on with my EP500? [Re: Philippe]
Vanorge Offline
buff

Registered: 11/12/09
Posts: 47
Loc: south coast metro CA. the OC
okay got my new subwoofer yesterday and installed it. i have a few questions. does it matter how i hook it up. because there are two sets of negative and two sets of positive. so which set of negative and positive go on which side of the subwoofer? hope that makes sense.

i didn't get to calibrate it yet, as im doing that right now, but i did notice yesterday that it seems to be pushing more air out. before it used to suck in more than blow out. anybody know which way it's supposed to be. i would think out but you never know also could i have possibly gotten the connections reversed or better yet right!

tx

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#319999 - 08/25/10 06:09 PM Re: whats going on with my EP500? [Re: Vanorge]
Ken.C Offline
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Registered: 05/03/03
Posts: 18044
Loc: NoVA
You shouldn't be using the high level inputs at all--you should be using a single RCA connection between your sub and the LFE/Sub output on your receiver. The connector on the sub is a 1/4" to RCA right angle adapter, and it can be a little finicky.
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#320004 - 08/25/10 06:34 PM Re: whats going on with my EP500? [Re: Ken.C]
Vanorge Offline
buff

Registered: 11/12/09
Posts: 47
Loc: south coast metro CA. the OC
no im not using high level inputs... i was talking about the speaker connections from the amp to the woofer. the ones inside the box

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#320005 - 08/25/10 06:37 PM Re: whats going on with my EP500? [Re: Vanorge]
Ken.C Offline
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Oh. Got me.

Can you take a picture for us?


Edited by kcarlile (08/25/10 06:37 PM)
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#320008 - 08/25/10 06:49 PM Re: whats going on with my EP500? [Re: Ken.C]
Vanorge Offline
buff

Registered: 11/12/09
Posts: 47
Loc: south coast metro CA. the OC
i'll see how soon i can post some pics, i have my niece with me. tx for trying tho

but for now i guess its called the dual voice coil connections i think.

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#320009 - 08/25/10 06:56 PM Re: whats going on with my EP500? [Re: Vanorge]
Ken.C Offline
shareholder in the making

Registered: 05/03/03
Posts: 18044
Loc: NoVA
I doubt it matters; as long as you've got red to red and black to black, as it were, on both sides, it should work fine. Now, if you've got one reversed, that's not going to be a happy thing, but...
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#320030 - 08/25/10 10:50 PM Re: whats going on with my EP500? [Re: Vanorge]
pmbuko Offline
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Registered: 04/02/03
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Loc: Ben Lomond, California
Originally Posted By: Vanorge
i did notice yesterday that it seems to be pushing more air out. before it used to suck in more than blow out. anybody know which way it's supposed to be.

Vanorge, any subwoofer that is ported must port must blow out and suck in equally. If you believe you're feeling a difference, it's most likely because your hand is not a sensitive enough measuring device. smile

This equal-blow-and-suck isn't just a rule I invented, it's physics. Allow me to explain. In order to make a sound, the subwoofer driver must move outward and inward many times a second. Every time it moves outward, it creates a slight vacuum in the box which causes air to move in through the port. Every time it moves inward, it pressurizes the air in the box and causes air to move out through the port. Keep in mind that the driver is moving in and out anywhere from 20 to 80 times a second or more.

If the subwoofer port were actually blowing more than sucking, that would mean the driver was moving further and further into the box and not returning to the neutral position.

The moral of the story is don't worry too much about the air moving through the port. If you can feel air at all, that means it's working.
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#320050 - 08/26/10 07:59 AM Re: whats going on with my EP500? [Re: pmbuko]
Murph Offline
axiomite

Registered: 10/05/06
Posts: 6955
Loc: PEI, Canada
Originally Posted By: pmbuko

If the subwoofer port were actually blowing more than sucking, that would mean the driver was moving further and further into the box and not returning to the neutral position.


Not to mention that the constant reduction in air pressure inside would mean it would eventually either
a. implode
b. suck in your cat and other small objects
c. turn into a black hole from which nothing short of the the evil power of Justin Beiber's haircut could escape.

Chris will be along shortly to take my laws of physics humor seriously and explain the error of my theories.....
smile Just Kidding Buddy! smile
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#320055 - 08/26/10 08:10 AM Re: whats going on with my EP500? [Re: Murph]
CatBrat Offline
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Registered: 08/05/09
Posts: 6015
Loc: Milky Way Galaxy
:hiding my cat:

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#320107 - 08/26/10 01:46 PM Re: whats going on with my EP500? [Re: pmbuko]
Vanorge Offline
buff

Registered: 11/12/09
Posts: 47
Loc: south coast metro CA. the OC
Originally Posted By: pmbuko
Originally Posted By: Vanorge
i did notice yesterday that it seems to be pushing more air out. before it used to suck in more than blow out. anybody know which way it's supposed to be.

Vanorge, any subwoofer that is ported must port must blow out and suck in equally. If you believe you're feeling a difference, it's most likely because your hand is not a sensitive enough measuring device. smile

This equal-blow-and-suck isn't just a rule I invented, it's physics. Allow me to explain. In order to make a sound, the subwoofer driver must move outward and inward many times a second. Every time it moves outward, it creates a slight vacuum in the box which causes air to move in through the port. Every time it moves inward, it pressurizes the air in the box and causes air to move out through the port. Keep in mind that the driver is moving in and out anywhere from 20 to 80 times a second or more.

If the subwoofer port were actually blowing more than sucking, that would mean the driver was moving further and further into the box and not returning to the neutral position.

The moral of the story is don't worry too much about the air moving through the port. If you can feel air at all, that means it's working.


i didn't measure with my hand.why would you assume that? I used a sheet of paper.I don't think i need nasa equiptment for the simple observation.

what would happen is, it used to suck in the paper more than blow it out. now it blows it out alot more, and harder to boot. i just thought it was strange.

regardless it's working well now. I calibrated it and watched gamer. i do have to set the subsonic filter to on though since i listen to movies quite loud. 100db peaks with my radio shack spl meter. for with the subsonic filter to off, it bottoms out. it made that same clack but just once.

my conclusion is it's a great sub, i just don't like that i can bottom it out at 100dbs with subfilter to off. im eager to try out the SVS ultra.

with it cutting out at 20hz its phenomenal tho.

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