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JBL Transducers are legendary for their performance. The custom-designed driver in the LSR310S exemplifies JBL engineering prowess, delivering deep low frequency response into the 20 Hz region, and 113 dB peak output, for long periods at full rated power with no risk of failure. Here's what JBL have to say about this Sub Woofer I do not have the output running through the sub and up to the mains as most do. Instead, I control the mains and sub separately from the MC3. When I first hooked it up, I tried a pair of balanced cables and wondered, "where did all the bass go?" Figuring I might have a polarity issue, I tried one channel only — same thing (what the???).
It took me a few minutes to dial in the JBL, but once I figured that out it sounds smooth and complimented my setup perfectly. I'm not sure why anyone in a studio setting would want to use anything but the 80hz crossover. It had PLENTY of power, in fact, it's set to about 40 percent power to balance out with my studio monitors. Folks that say it doesn't have enough power need to turn down the gain of their monitors. If you hook it up the conventional way, ignore the above but it gives you an idea how useful it can be in non-standard hookups.
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I use mine via a direct connection from my monitor controller and do not use the built in crossover.
The whole idea of a studio sub is not to blow you away (which this can certainly do) but rather to compliment (extend the frequency range of) the monitors. It does this very well. If you don't use this balance, your mixes will not be accurate may result in them being low-frequency deprived. Very clean meshing with the JBL LS305's I'm using for monitors. Very easy to hook up, no adjustment was required. Just make sure it's all setup like the manual tells you, and you're golden. The 80 Hz setting is recommended for use with the LSR305, LSR308 or any studio monitors. The External setting allows use of an outboard crossover.To sum up, I finally got the promised output and it balanced nicely with my monitors. I also found some shelves that now rattle because of the extra bass (easily fixed). Definitely not made to sound good in any condition. Will require a half decent room to sound the way it should. It definitely didn't sound bad to start without a good room but it was a little separated. The LSR310S from the renowned company JBL is an active 10-inch subwoofer with downfire bass reflex technology, optimized for interaction with the LSR305 studio monitors, which are equipped with a 5-inch driver, as well as the LSR308, which is equipped with an 8-inch driver. For 499 euros (RRP), JBL equips its bass box with a 200 watt class D amplifier along with symmetrical inputs and outputs. According to the manufacturer, the downward-facing 10-inch driver ensures a maximum sound pressure of 113 dB (Max. Peak SPL) with a transmission range that extends down to 27 Hertz. An ideal "sub-bass supplier" for stereo listening stations or as a "low frequency effect speaker" in surround environments? The audio quality wasn't excellent, for me, until I ended up with the sub and both 305Ps' Input Sensitivity set at +4dBu, sub crossover set at 80Hz, each 305P's EQ Boundary and HF Trim both of them set at 0, both 305P volume knob at 9, and sub volume at max, interface volume around 1:00.
Detail. I've played some very heavy bass at unreasonable volumes through it and it never even blinks. Steady, smooth, detailed bass at whatever volume you want. A TRS connection into one side only yielded the weakest output—same with XLR. Going to an unbalanced mono guitar cable into one side gave me much better output but I suspected there was better. Finally, I used an unbalanced guitar cable in one channel only. Boom! There it was! My studio is in the middle of electrical interference hell (aka the Silicon Valley) so I used a balanced cable from the MC3 to the JBL but terminated it with a 1/4TRS-F to TS-M stereo to mono converter (Hosa GPP-290). Now I had a balanced line with a mono plug. Hey, it works and is quiet. Now, the bass in cd audio is incredibly amazing and you can easily and clearly hear all the high frequency too. I have the 305Ps placed near two of my room's corners; and the sub sits, a little in front of the 305Ps, in almost the room's horizontal center. I moved it nearer to a side wall bc when it's placed in the horizontal center the bass from one side of the room perfectly meets bass from the other side and the bass cancels itself out. This was quite evident, then moved this sub over a little… and bass sounds fantastic now. JBL Transducers are legendary for their performance. The custom-designed driver in the LSR310S exemplifies JBL engineering prowess, delivering deep low frequency response into the 20 Hz region, and 113 dB peak output, for long periods at full rated power with no risk of failure.Hugely powerful. Would probably take the paint off my walls if I cranked it too much. However, even with the imposing power, it's never boomy or distorted. This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items. To return faulty items see our Returning Faulty Items policy. With balanced XLR and 1/4" inputs and XLR outputs you can add the LSR310S to any studio monitor system to extend its low frequency performance or use it as the ".1" LFE Channel in a surround sound system. The -10dBV/+4 dBu sensitivity switch ensures compatibility with a broad range of signal sources, allowing you to connect the LSR310S to high-output professional equipment without any danger of input overload.
The downward-facing driver ("Low Frequency Transducer") has a diameter of 10 inches, which corresponds to about 250 millimeters, and has a very soft surround and a fairly large, maximum deflection of almost two centimeters (3/4-inch). By the way, "transducer" means structure-borne sound generator and is a clear indication that the loudspeaker radiating downwards should reproduce the low frequency components that are particularly popular in surround environments and that are barely audible but physically perceptible. At JBL, audio technology is at the core of everything we do. For over 65 years we have employed the best methodology and tools, and, as established at the very beginning by our founder, James B. Lansing, we develop everything from the ground up. This not only ensures success in the marketplace, it guarantees our efforts exceed the needs and expectations of audio professionals throughout the world. Would you be interested in reading about Musical Review: A Little Night Music Review as well? There's a lot of great information to be found in this article.
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TL;DR - balance the sub with the monitors, use the -10dBV setting on your LSR monitors if that's what you're using (as stated in the manual), and don't hesitate to use the -10dBV setting on the sub to get proper gain staging even if you're using "professional equipment." If you just dime everything, it won't be properly balanced and won't sound good. Balance out the system and use proper gain staging, and the sub is fantastic! If you're finding this article engaging, you might want to consider reading our article on StudioTime.io Studio Marketplace Review too, as it could be a helpful resource. The JBL instructions state that when you do this, go into one side, either L or R but not both. Do not believe this. Sweetwater Rep, Please replace the Review that I submitted yesterday (4/18), as I judged this product unfairly, and have found that it can be acceptable under the right conditions.
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