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Item # 581519 | Customer Ratings: Ratings ( 4 Based on 24 reviews)

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QSC KSUB Powered Subwoofer
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      QSC KSUB Powered Subwoofer (581519)
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A powerful sub with a modest footprint for crowded stages.

The QSC KSub Powered Subwoofer is the ideal supplement to QSC K Series 2-way speakers for live reinforcement of bass instruments and drums, or higher-level playback of recorded music. Its 1000W Class-D power module never fails to deliver. The KSub subwoofer's M20 threaded pole socket (pole included) provides a secure, wobble-free method of elevating a mid-high speaker over the subwoofer. The KSub subwoofer's compact footprint won't take over the stage, dance floor, or seating area of smaller venues. A pair of high-power 12" speakers in an optimized band-pass enclosure will handle everything the 1,000-watt power module can give them. Compact in size, the QSC KSub has ergonomically designed handles and 3" noise-free casters ease load-in and load-out.

QSC KSUB Powered Subwoofer Features:

  • 1,000W Class D power module
    Professional appearance and rugged construction
    GuardRail technology discreetly protects the system from damaging overload
    Locking IEC power cable
    XLR and 1/4" connectors
    Phone Mic/Line and Line inputs with Loop-thru connectors and independent level controls.
    Phono (RCA) inputs
    Front mounted LED may be switched off or indicate "LIMIT" or AC Power On
    High-Pass Filter
    Dual 12" band-pass for compact size, efficiency and high-power handling


QSC KSUB Powered Subwoofer Specifications:

  • Amplifier Power: 1000W Class D
    Transducers: Dual 12" Bandpass
    Frequency Response: 44–100Hz (at HPF)
    Max SPL: 130dB
    Operating Voltage: 85–275 VAC @ 50–60Hz
    Included Accessory: Threaded speaker pole
    Unit Dimensions: 14"W x 26"H x 28-1/10"D (including casters)
    Weight: 74 lb.


Product Reviews
(Based on 24 reviews)
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Viewing Reviews 1 - 3 of 24 |
  • AMAZING POWER!

    As reviewed by DJ TMAQ on 10/11/2010

    1000 Watts is really loud. The bass from the KSUB sounds smooth and clear, with deep solid chest thumping hits. The dual 12" speakers inside really are amazing in how QSC managed to produce the powerful bass this sub gives. I bought this KSUB new from my local GC and in the pictures the casters are silver, but the cab i bought had BLK casters and they didn't rattle either when i tested the sub. I went straight home and set it up and was amazed. 18 inch subs produce a low frequency of 30 Hz, and this sub produces as low as 44 Hz. But 12's are punchier than 18's. The payoff for me in this sub is the full sounding bass of the KSUB and that it's light enough for me to lift and load alone. If you get an 18 in favor of a deeper 30 Hz bass, you'll definitely sacrifice the lightness and need a second person to help you lift it. PROS: It's very light (72 lbs.), it's compact, it sounds great, looks very professional, quality craftsmanship. I'm 100% satisfied. CONS: seriously no downside to this sub.

    18 of 18 people found this review helpful.
    Was this review helpful?
  • Clean portable bass for almost all applications!

    As reviewed by Cris on 1/6/2011

    i have 2 Ksubs and these things rock! I have found that subwoofer placement is the key to getting big bass out of these things. I rarely use both, I just did a party for 180 people and 1 Ksub had enough to knock off some liquor bottles from the bar shelf! I find having the subs facing a wall or even better a corner really amplifies the output. And since they are super portable and low key, it helps them keep out of sight. I can have the sub 10 to 20 ft away from me and the whole room gets filled with loud clean bass! When using the pair, i couple them together side by side and the output is amazing. They work well for dance and hip hop music, which is what I mostly play. Only a few songs with the lowest of frequency I notice the limitations of a 12" woofer. But really that's only about 5% of the music out there. I feel the pair of Ksubs is louder than my previous PRX718 sub but just don't go as low. The build quality is excellent so no worries there. You' ll pay a pretty penny for them, but for me portabilty and flexability were key. When I had 1 PRX sub, sometimes it was too much to bring for parties with 100 people or so, now I have option to bring 1 sub, and with the pair 350-400 people is no problem.

    11 of 11 people found this review helpful.
    Was this review helpful?
  • Grear for DJ's. Not for Bands.

    As reviewed by Adam Prather on 11/18/2010

    I bought one of these subs along with two k12's from my local guitar center. My overal first impressions of this sub was that it sounded good but didn't really have the output or the bottom end that I was expecting. So I bought another. 2 ksubs with the k12's mounted on top sounded great. I have used these for both DJ gigs and running sound for my Dad's band. After having these for about 6 months I finally decided that I wanted more and sold both of them and bought a KW181. Big difference. I can't wait to get another. The ksub's just simply don't have that impact that I was looking for. If your looking for chest thumping bass and you like QSC buy a KW181.

    8 of 8 people found this review helpful.
    Was this review helpful?
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