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  1. #1

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    Default Need a REALLY quick advice.

    I am running LSi9s, LSiC, and FXs with 3 monoblocks from Outlaw and I have FXs sitting on Yamaha HTR-6090. I also have one Martin Logan Dynamo hooked up via "sub-out" from AVR. I am moving and my room will be expending: 13x30 with listening area about 13x16. The question is: Should I buy second Dynamo ? And maybe hook it up straight from my first Dynamo's "multi sub-out" port ?

  2. #2

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    Listen to it first with both music and movies. That will give you the best indicator if you need another one.
    Sunfire TGP III PrePro, Sunfire Cinema Grand Signature 405wpc 5 ch. Amp, Rotel RCD-1072 CDP, Onkyo TA2600 Tape Deck, Pioneer Elite 47-A DVD, Sony 32" XBR TV, Polk RTA-8T Main Speakers, Boston VR-920 Center Channel, Boston PV-600 Subwoofer, Polk DSW 400 Subwoofer, Polk FXi-3 Surround Speakers

  3. #3

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    Quote Originally Posted by cfrizz View Post
    Listen to it first with both music and movies. That will give you the best indicator if you need another one.
    i would do that. but i have not moved in yet and this sub that i want to purchase will not last long for $350-400

  4. #4

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    Obviously 2 is better than 1.....

    Each sub will have to work half as hard for the same output in that size room

    I say go for it - you will have a lot more options for placement (stacked, stereo, etc)
    Living Room:.................... Zone 2 (Workout Room):
    AVR - Yamaha RX-V757......JBL 4312 Pro Monitors
    Pre - Nak CA-5
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    AMP - Adcom 545II (Center)
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    Sub - Snell Basis 300:p......Zone 3 (Outside)
    CD - Yamaha CDC-555.......Def Tech AW5500
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    Monster HTS1600 Power Center
    Dedicated Circuit - (2) 20amp, (1) 15amp
    Ben's IC, Canare 4S11

    **Dayton and Sonicap Caps with Mills Resistors**

  5. #5

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    I second the above ... do it.

    The price is certainly right...the added benefit of multiple placement to even out bass or coupled to get the extra 6db.

    The chance to match up an already owned sub for about 1/2 price...yes it could end up collecting dust, though I doubt it will.

    350 for spare parts, a back-up unit , or just the ticket however you choose...in this hobby we likely all have spare gear clocking time in a corner or closet.
    Last edited by Music Joe; 11-08-2008 at 06:13 PM.

  6. #6

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    well I ended up buying second dynamo at tweeter for $360

    So now I have 3 options on hooking this up: LFE out, stereo, or a guy at tweeter sugested using LFE for one and center channel for another

  7. #7

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    I would recommend running them both from the LFE out. (use a Y cable to split the signal to each sub)
    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)

  8. #8
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    Quote Originally Posted by kolyan2k View Post
    well I ended up buying second dynamo at tweeter for $360

    So now I have 3 options on hooking this up: LFE out, stereo, or a guy at tweeter sugested using LFE for one and center channel for another
    I would not recommend doing the "one on center, one on sub" configuration. Try it out stereo and split LFE. Like McLoki I'd recommend the latter...
    -Eric
    -Polk Audio

  9. #9

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    I was passing by another tweeter and another audiofile in store Also recommended LFE or Center channel. Will try both tonight

  10. #10

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    Never hear of trying to run a sub off your center. (REALLY deep voices??) fronts maybe but not center. I stick with my original suggestion - just run stereo LFE's....
    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)

  11. #11

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    Quote Originally Posted by kolyan2k View Post
    I was passing by another tweeter and another audiofile in store Also recommended LFE or Center channel. Will try both tonight
    I wouldn't call him an audiofile. It's more like audiofool. You have two choices. No wonder tweeter is going down:(
    A: run them both LFE
    B: you can hook them up stereo, and set the source to no sub. The LFE tracks will then go to both L/R speakers. This will tax you mains heavily though, and depending on the level it could damage them.

    I would stick with A;)
    Please. Please contact me a ben62670 @ yahoo.com. Make sure to include who you are, and you are from Polk so I don't delete your email. Also I am now physically unable to work on any projects. If you need help let these guys know. There are many people who will help if you let them know where you are.
    Thanks
    Ben

  12. #12

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    Full range center kicks ass...

    Same thing for surrounds --

    But definitely agree with the above - run it LFE *stereo* - which isnt a correct statement. No such thing as stereo LFE --- the proper way to do it is stack it since it isnt stereo if you seperate them -- you risk cancelations and yada yada
    www.Vr3Mods.com ///// www.Version3Audio.com

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  13. #13

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    Put one sub in the front, the other in the back. I currently have two subs set up this way for HT. Bass all over the place.
    HT/2-channel Rig: Sony 50 LCD TV; Toshiba HD-A2 DVD player; Emotiva LMC-1 pre/pro; Rogue Audio M-120 monoblocks (modded); Placette RVC; Emotiva LPA-1 amp; Bada HD-22 tube CDP (modded); VMPS Tower II SE (fronts); DIY Clearwave Dynamic 4CC (center); Wharfedale Opus Tri-Surrounds (rear); and VMPS 215 sub

    "God grooves with tubes."

  14. #14

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    Quote Originally Posted by Vr3MxStyler2k3 View Post
    Full range center kicks ass...

    Same thing for surrounds --

    But definitely agree with the above - run it LFE *stereo* - which isnt a correct statement. No such thing as stereo LFE --- the proper way to do it is stack it since it isnt stereo if you seperate them -- you risk cancelations and yada yada
    So are you saying it IS a common thing to do........to run sub from center pre-out ?

    I have 0 movies and my cable box is not working, and its a big pain to for me to hook the sub up to center. This is why I cannot try it for myself at the current moment.

  15. #15

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    Last edited by kolyan2k; 11-13-2008 at 05:22 PM.

  16. #16

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    Of course I ment dual subs from the same input - not stereo (just got lazy in my description).

    As for stacking vs separating them, that is completely room dependent. (good room for bass, stack - bad room, separate.)

    If you run your center as small - you are crossing over to your subs electronically before it goes to the amps (only subs are producing bass, center is only producing above 80hz. - and yes, I know that the crossover is a slope, not a cliff and that statement is not exactly right either, but you know what I mean).

    If you run your center as large with a sub in line - you are low pass filtering for the sub (blocking the highs) but your center is still trying to run full range. It will work, but the cases where it would sound better would be limited. I would think you would have more of an issue with cancellations this way as well since it would be similar to trying to run 2 different subs at the same time, something most seem to recommend avoiding if at all possible.

    Anyway - best of luck in your test and definately report back what you find out.

    Michael
    Last edited by McLoki; 11-13-2008 at 06:12 PM.
    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)

  17. #17

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    Nice setup, add a motorized screen and a front Projector for viewing during the night hours and youre golden. Nice setup .
    Shoot the jumper.....................BALLIN.............!!!! !

    Home Theater Pics in the Showcase

    http://www.polkaudio.com/forums/show...p?userid=73580

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