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  1. #1

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    Default anyone running 2 subs?

    I currently have a single psw 505 and am considering buying a second one. reason being is the sub will be in between my tv stand and right tower, and it looks kind of funny not having a congruent set up. also, i'm guessing 2 is better then 1? anyone else doign this?

  2. #2

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    A second sub will add more bass than you might think. If you want powerful bass, do it.

    If you think it'll look good to have 2 subs separated by a tv, don't do it.

  3. #3

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    I like my setup....

    I'd like to get a second RW-10D so i can move those out to the HT setup, but for now, i'm pretty happy.
    I don't read the newsssspaperssss because dey aaaallllllllll...... have ugly print.

  4. #4
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    Yes, two subs (of the same model- very important) are nearly always better then one of the same model. If you put them close together (stacking or side by side)- they will mutually couple (meaning more bass) providing about 6 dB more bass capability. If you put them in different parts of the room, they can help smooth out the bass response over a larger area.
    -Eric
    -Polk Audio

  5. #5

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    Quote Originally Posted by Eric Wong View Post
    Yes, two subs (of the same model- very important) are nearly always better then one of the same model. If you put them close together (stacking or side by side)- they will mutually couple (meaning more bass) providing about 6 dB more bass capability.
    Very true..!


    If you put them in different parts of the room, they can help smooth out the bass response over a larger area.
    This one very tricking, if you put them say 10 feet apart they will more harm than good! More than 50 feet apart your chances are good on getting good sound from them. Good luck!
    Thanks, Jeff...

  6. #6
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    Quote Originally Posted by Jeff Beaird View Post
    This one very tricking, if you put them say 10 feet apart they will more harm than good! More than 50 feet apart your chances are good on getting good sound from them. Good luck!
    Depends on the room's shape and dimensions, as well as the placement of the subs AND the position of the listener(s). It also depends on the goals of the system- if it's maximum SPL at one location, or smoothest response over the largest possible area- either uses a different approach. 10 feet in some rooms may be optimal in smoothing out standing waves and nulls. Regardless, you can't just make a blanket statement saying 10 feet apart will do more harm then good.

    Also, most listeners aren't going to have rooms that can accomodate subwoofers being placed 50 feet apart. If you did, it would be better to close couple the subs for the mutual coupling and greater acoustic output.

    Still, 2 identical subs are almost always better then 1.
    Last edited by Eric W; 08-26-2008 at 04:25 PM.
    -Eric
    -Polk Audio

  7. #7

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    thanks everyone. the subs will be below the screen, facing my couch. they will be around 50" apart. I starting thinking of this due to appearance, but if there is a sound benefit i'm all for it. a couple hundred bucks isnt much given what ive spent on the project thus far.

  8. #8

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    You can try relocating the subs closer to the seating position. I have two firing in the rear left and rear right corners and I like them very much.

    With both drivers firing at or near your seat, you can "feel" more bass. This might not be the best for room modes, but it may add to the experience.

  9. #9

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    i just thought of this, but is there any issue w/ running 2 subs on my Denon 2808CI? Does my reciever support running 2 subs? I am running 2 front towers, 2 rears, a center channel, and 2 outdoor speakrs as well...

  10. #10

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    There is an LFE/out on the receiver correct? As long as you use a y-splitter, the signal can go into two subwoofers. There is no load on the part of the receiver.

  11. #11

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    I have no idea about the LFE...does the Y splitter cause any sound loss? or is it a powerless connection?

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    Do you run an RCA cable to your sub or speaker cables? If you run RCA cables, get a "Y" cable with 1 male end and 2 female ends. Plug the male end into your AVR, plug your subwoofers into the female ends.

    All will be fine.

    If you are running speaker cables, hook your right channel to one sub and your left channel to the other one. (then going on to the repective right and left channel speakers)

    Either way - 2 identical subs are almost always better than one.
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

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    Read this; http://www.falstad.com/wavebox/
    It pretty much explains everything.;)
    Thanks, Jeff...

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    I'm running 2 identical subs in the front. Mine are 6' center to center. I've tried different configurations and this set up seems to do the best job. I'm sure you'll be very happy with the addition of another sub.:D And if it looks better, that's just an added bonus.;)

  15. #15

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    damn it! i put the sub in my cart last night when it was $249, today its $289! now i'm too stubborn to buy it!
    Last edited by mod220; 08-27-2008 at 05:51 PM.

  16. #16

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    you dont need that extra bass , that will look like as if you are just shaking things with bass , you will not even sense that there is tweeter in teh sound , you wil not at all enjou the song.
    As you know the PSW505 is a bass reflex design, with a front-firing woofer and rear-firing slot vent. The slot vent is 12” wide, 1.25” high, and 13” deep, with a smoothed edge transition to the rear faceplate. The internal surface area of the slot vent is about 15 square inches; about the same as having two 3” round ports. A close-mic sweep of the woofer revealed an enclosure tuning frequency of 35 Hz.

  17. #17

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    Quote Originally Posted by joe.inom View Post
    you dont need that extra bass , that will look like as if you are just shaking things with bass , you will not even sense that there is tweeter in teh sound , you wil not at all enjou the song.
    I could not disagree more. When you add an additional sub, you adjust the volume of the subwoofer in your preamp (or on the back of the subs) to a lower level. The bass you hear will be about the same volume as what you heard before you added the sub.

    The benefit is in the additional headroom that you will have, the lower distortion the sub will produce and the smoother response you will get throughout the room since each sub will react differently to the room.

    In my room, at any volume, dual subs sound better than a single. - give it a shot and see if they sound better in yours as well.

    Michael
    Mains.............Polk LSi15 (Cherry)
    Center............Polk LSiC (Crossover upgraded)
    Surrounds.......Polk LSi7 (Gloss Black - wood sides removed and crossovers upgraded)
    Subwoofers.....SVS 25-31 CS+ and PC+ (both 20hz tune)
    Pre\Pro...........NAD T163 (Modded with LM4562 opamps)
    Amplifier.........Cinepro 3k6 (6-channel, 500wpc@4ohms)

  18. #18

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    closer the better other wise the cancelation monster will creap up on ya
    " He who dies with the most equipment wins Right ? "

    Denon 3300 [COLOR="Blue"]Adcom 535 BBe w/sub out 1 pr 4.6s 2 pr of 4 jrs Recent additions Samsung Lns-4095D LCD, Samsung hd-960 DVD, Monster HT-5000 Power center
    ,HPSA-1000 18" sealed DiY home sub.:D
    Black Laquer 1.2tl's w/ upgraded x-overs and Tweets BI-Amped with 2 Carver tfm-35's Knukonceptz 10ga cables

  19. #19

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    I just added a second, identical, sub and I was very impressed with the results. I have them side by side, fairly close to a corner. No boom, just DEEP tight lows. And as mentioned above, you can turn the level down and get the same, if not more, bass. I went with M&K because they are sealed boxes that match my SRS's. (sealed) They blend seamlessly.

    stubby
    SDA SRS
    Denon POA 2400
    Rotel RSP 1068





  20. #20

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    Is there a particular aesthetic reason why you have both of them in one corner? With two subs, everything becomes much harder to calibrate. Ideally, you want them apart from each other to balance out standing waves. A good place to start is to have them opposite sides of the room (opposite corners, i.e. behind front left speaker and behind rear right, or behind both the fronts).

  21. #21

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    I tried opposite corners but did not get the best results. I had one close to the right channel and the other close to the right rear corner. They seemed to cancel each other out with no gain in volume or quality.
    In fact, the M&K owner's manual recommends stacking them close to a corner. Just too tall for my taste, so side by side it is.

    stubby
    SDA SRS
    Denon POA 2400
    Rotel RSP 1068





  22. #22

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    Default Twin 505's rock

    I am currently running twin 505's words cannot describe the thrill!! There seems to be nothing quite like including most internal organs in the moving watching experience.
    Yamaha rx z9
    Rti 10's front
    A6 center
    (2) Psw 505 subs
    Rti 10's sides
    Rti 6's backs

  23. #23

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    technically, one sub should be along the front wall, 1/3 the distance from a side wall... a second sub should be on a side wall, 1/3 distance from an adjacent wall, away from the front sub... adding a third sub shud be on the rear wall for best balance sound. This should reduce lobing from standing waves in dead spots.

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