My Polk Lsi 705's needs an economy subwoofer

Trevorj800Trevorj800 Posts: 10
Not a lot of money, and I have to order them because I live in a place with no audio stores. What's a good sub in the $150--250 range? I am particularly looking for something that performs well at relatively low volume. It will be in a large rectangular room with 11 foot ceilings and lots reflections -- a glass door and bouncy concrete walls.

Comments

  • tonybtonyb Posts: 31,652
    edited December 2017
    so...you want a miracle then ? :)

    Big room, sub to hit lower than the 705's, for under 250 ? Maybe Dayton subs, but I won't commit to the quality of the sound as compared to others.

    Subs don't usually do well for low volumes.
    My guess is your problem is elsewhere in your system, those 705's can belt out some decent low end. What are you driving the 705's with ?
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1430
    Tad 803 speakers
  • F1nutF1nut Posts: 43,143
    edited December 2017
    There's your problem. Well, that and the room.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • What's wrong with my amp?
  • F1nutF1nut Posts: 43,143
    I've got CD/SACD players that weigh a lot more meaning your AVR doesn't have much of a power supply and it all starts with the power supply. AVR's are good for HT use, not 2 channel music.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • EmlynEmlyn Posts: 2,534
    https://www.amazon.com/Bic-Acoustech-PL-200-II-Subwoofer/dp/B074131NKS/ref=pd_sbs_23_2?_encoding=UTF8&pd_rd_i=B074131NKS&pd_rd_r=SM0P8T7AG7XC78PPF91W&pd_rd_w=plFX6&pd_rd_wg=bAM1J&psc=1&refRID=SM0P8T7AG7XC78PPF91W

    There will be compromises in a budget subwoofer, but they can be minimized for $249. At $150 there isn't much worth looking at. Check out Amazon for other offerings like the Polk PSW505, Elac S10, Klipsch R-10SWi.

    A subwoofer and low volume tends to not make much sense. Why have a subwoofer at all if you're not going to crank it up and use it? The LSiM705s will not benefit from an added subwoofer at low listening levels.

    If you decide to upgrade to better gear later to better suit the large room, move the bargain subwoofer to an office or bedroom system.
    1. Polk LSiM707, 704C, 703; Dual SVS SB2000 subwoofers; Marantz SR7011 receiver; Parasound A23 amp; Oppo 205; Sony 65" 4K TV; FIOS; PS Audio Power Plant Premier; MIT S2 cables
    2. JM Labs Electra 920.1; Sonic Frontiers Line 3 Preamp; Classe Model 25 amp; Sony HAP-Z1ES; Oppo 105D; Music Hall MMF7 and Acoustech phono pre; PS Audio Power Director; MIT S1 Cables
    3. Polk LSiM703; Parasound JC2BP and A21; Sony 48" 4K TV; Wyred4Sound DAC 2; Oppo 203; Squeezebox Touch; MIT S3 cables
  • rooftop59rooftop59 Posts: 6,019
    Hey Trevor, do you have a full surround setup or are you just running two channel? If two channel, I would definitely look at selling the avr and adding the $250 to what you get from the avr. Get a used integrated or a used pre amp and amp (like a B&K reference 30) and you will be much better off.

    Or, shameless plug, my yamaha that I am selling is much heavier and much better sounding than that onkyo. http://forum.polkaudio.com/discussion/179720/yamaha-rx-a1010-and-parasound-hca-1000a#latest
    Living Room 2.1: Dynaudio Contour 1.3mkii; Energy s10.2 sub; Cambridge Azur 851a; Cambridge Azur 752BD; Bryston BPD-1; NVidia ShieldTV
    Game Room HT: Denon AVR-X4200w; Definitive Technology SM350; Definitive Technology LCR2000; Definitive Technology Procinema 800; Mirage Nanasats; Sub - HSU VTF-2 MK5; LG UP870 4K BDP;
    ; Master Bedroom
    Cambridge Azur 551r; Definitive Technology SM45, ACI Titan Subwoofer Squeezebox Touch
  • tonybtonyb Posts: 31,652
    Trev,
    Obviously your losing bass response at lower volume levels, which for the most part, is somewhat normal. A sub isn't going to help with that. More power will help some, and that receiver is pretty weak when it comes to power.

    Your choices as I see it, is....

    A- buy a better more powerful receiver. Make sure it has preouts to be able to add an amplifier down the road. Yours doesn't, which limits your abilities.

    B- if your system is just for music listening, move away from receivers and get a pre-amp/amplifier combo when the 'ol wallet allows.

    you can add a subwoofer if you want, but in your price range finding one that will dig deeper than your speakers is going to be tough. Especially if you have a large room. Bigger the room, bigger the sub needs to be to pressurize that room.

    As for what you have right now, some things you can check is....

    Are your speakers set to full range ?
    Are speaker levels set to 0 or slightly in the + side ?
    Is your receiver set to "no subwoofer" or none, if you don't have one now.

    Hope that helps ya out some, let us know how it goes.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1430
    Tad 803 speakers
  • mhardy6647mhardy6647 Posts: 23,649
    There are plenty of cheap (powered) subwoofers. I think that one gets what one pays for in that regard.

    Parts Express kind of runs the gamut vis-a-vis subwoofer options: from the ridiculous to the (relatively speaking) sublime, FWIW.

    https://www.parts-express.com/cat/powered-subwoofers/95

    FWIW, I have (had) a cheap powered subwoofer for a long time -- a 10" ported powered "Atlantic Technologies" brand buyout from Parts Express. It did its job, but was kind of one-note and not particularly 'musical' (for lack of a better term).

    Recently upgraded to something in another league entirely, though.


  • EmlynEmlyn Posts: 2,534
    Concrete walls, glass, and high ceilings also make it hard to achieve good controlled low frequencies. It may take two subwoofers to get decent sound, and I would be thinking in the $500 a piece range for subwoofage. A new receiver alone may not do much to control the room reflections.
    1. Polk LSiM707, 704C, 703; Dual SVS SB2000 subwoofers; Marantz SR7011 receiver; Parasound A23 amp; Oppo 205; Sony 65" 4K TV; FIOS; PS Audio Power Plant Premier; MIT S2 cables
    2. JM Labs Electra 920.1; Sonic Frontiers Line 3 Preamp; Classe Model 25 amp; Sony HAP-Z1ES; Oppo 105D; Music Hall MMF7 and Acoustech phono pre; PS Audio Power Director; MIT S1 Cables
    3. Polk LSiM703; Parasound JC2BP and A21; Sony 48" 4K TV; Wyred4Sound DAC 2; Oppo 203; Squeezebox Touch; MIT S3 cables
  • tonybtonyb Posts: 31,652
    Maybe Trev just wants a little more oomph when watching movies late at night at lower volumes.

    Still, imho....a big room, lower volumes, and a cheap sub = you just wasted your money.
    HT SYSTEM-
    Sony 850c 4k
    Pioneer elite vhx 21
    Sony 4k BRP
    SVS SB-2000
    Polk Sig. 20's
    Polk FX500 surrounds

    Cables-
    Acoustic zen Satori speaker cables
    Acoustic zen Matrix 2 IC's
    Wireworld eclipse 7 ic's
    Audio metallurgy ga-o digital cable

    Kitchen

    Sonos zp90
    Grant Fidelity tube dac
    B&k 1430
    Tad 803 speakers
  • I’m really interested in the new Monoprice Monolith subwoofers. I know, I shouldn’t be, but they appear to be awesome for the money.
    Oh, Listen here mister. We got no way of understandin' this world. But we got as much sense of this bird flyin in the sky. Now there is a lot that bird don't know, but it don't change the fact that the world is happening to him all the same. What I am tryin to say is, is that the course of your life, well its changing, and you don't even see it- Forest Bondurant
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