KRK10s SUBWOOFER USER GUIDE
IMPORTANT SAFETY INSTRUCTIONS CAUTION ATTENTION: RISK OF ELECTRIC SHOCK DO NOT OPEN RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. Warning: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture.
World Class Performance in Studio Reference Monitors KRK’s industry-leading line of studio monitors and subwoofers provide a level of precision and performance unheard of in monitor systems. Your KRK10s subwoofer features several key design elements that have come to be recognized as the “studio standard” for the world's finest engineers, producers, and musicians. Your KRK subwoofer delivers world-class performance—at a price that makes this a truly uncommon value. Contents Introduction . . . . . . . . .
Introduction Congratulations! Welcome to the latest KRK subwoofer series which includes the KRK10s. This KRK subwoofer series provides even better performance and accuracy, raising the bar once again above the competition. We aren’t the new standard. We have always been the standard among the world’s finest engineers, producers, musicians and DJs. This manual is intended to inform you of the many features of your new KRK subwoofer and its operation.
Unpacking Your new subwoofer has been carefully inspected and tested prior to packing and shipping. After unpacking your subwoofer, carefully inspect it for exterior damage and immediately report any physical damage during transit to your shipping carrier. Save the shipping boxes and all packaging materials in case the unit needs to be returned to your local dealer or Gibson Pro Audio. Please read the warranty card that was included in the shipping carton with your product before shipping to KRK Systems.
KRK Systems’ Design Philosophies Thank you for purchasing the KRK10s active studio subwoofer. We are the most dedicated monitor company in the world and we are thrilled you have joined our ever-growing family of loyal customers. Our Focus is Your Mix At KRK, our focus has always been to make the most accurate studio monitors available at any price. We don’t offer PA gear, mixers or motorcycles – just the tools you need to deliver a great mix.
KRK’s ERGO Room Correction System KRK provides a stand alone, high performance room correction system called ERGO. ERGO provides the ability to use up to two subwoofers with dedicated crossover functionality and delay compensation. For more information about using ERGO with your monitoring system please visit our website at www.krksys.com.
System Controls Volume The input sensitivity is adjusted (counterclockwise reduces sensitivity) with the rear panel mounted Volume control. Adjustment range is from -30dB to +6dB. Factory preset gain is +6dB. You may need to adjust this to match the level of your monitors. ON OFF Low-Pass Frequency Adjustment Low-Pass Frequency adjustment is performed through a continuously variable adjustment. The range is from 50Hz to 130Hz.
Connecting Your System ON OFF IMPORTANT: All connections should be made, all fader and controls should be set at their minimum levels, and all other equipment should be powered prior to powering up your KRK10s subwoofer. If you are connecting the sub’s Line Outs to your monitors, turn monitor power on after the subwoofer.
Hooking Up Your Subwoofer: Stereo Systems KRK subwoofers include a built-in crossover and amplifier, so you only need the appropriate hook up cables to integrate it into your existing monitor system. First, you’ll need to connect a pair of cables from the stereo monitor outputs of your console or audio hardware device to the left and right XLR, 1/4” or RCA input jacks on the subwoofer.
Subwoofer Hook Up with Passive Monitors If you are using passive (non-powered) monitors that require an external amplifier, you’ll first need to connect a pair of cables from the stereo monitor outputs of your console or audio hardware device to the left and right XLR, 1/4”, or RCA input jacks on the subwoofer. Next, connect the outputs of the subwoofer to the corresponding inputs of the stereo amplifier.
Subwoofer Placement and Set Up A properly set up subwoofer system extends the bass response of the main monitors (either stereo or 5.1 surround) without exaggerating bass response in the room. Improper set up may cause an exaggeration of bass response in the room, which in turn may cause the engineer to mix in less bass energy than desired.
Setting Subwoofer Levels Once the subwoofer is in position, its level needs to be matched with the near-field monitors. For stereo systems, the process is straightforward. Obtain a SPL (Sound Pressure Level) meter or use a smartphone app. If you will be using the internal high-pass filtered outputs from the subwoofer to the near-field speakers, as most of you will, set the low-pass filter on the KRK subwoofer back panel to 80Hz.
Hooking Up Your Subwoofer: 5.1 Surround This is a bit more involved than a stereo hook up since there are now six speakers involved— as well as something called Bass Management (see the Bass Management Theory section). Notice from Figure 3 that for professional use a separate 6-channel level control box is required between the mix-down deck and the monitor speakers. This is because few small format mixing consoles have provisions to switch and level-manage a 6-channel audio signal.
Beyond Stereo to 5.1 Surround When using a subwoofer for the LFE (Low Frequency Effects) channel in a 5.1 surround monitoring system, rotate the low pass filter all the way to the right to the 130Hz position. Note that the LFE channel is set with an additional 10dB of monitoring gain. To set this level, we recommend using 2-octave wide, band-passed, pink noise from 20 to 80Hz for the LFE channel and 500 to 2,000Hz for the near-field speakers.
Bass Management Theory Bass management is a method for extending the bass response of small, near-field speakers used in 5.1 surround sound systems (familiarly called home-theatre systems). This is done by routing frequencies below a cutoff point to a separate subwoofer (sometimes called “bass redirection” in home-theater receivers). This can usually be enabled by selecting “Small Speakers” from a speaker set up menu.
Removing the Subwoofer Grill The subwoofer grill can be removed and the grill’s rubber gasket can be reinserted to show off your KRK10s woofer. However, if you place your subwoofer in proximity to your feet we highly recommend leaving the grill on to protect the speaker! To Remove the grill and replace the grill’s rubber gasket, follow these directions: 1. Take a paper clip and bend a “tight” hook into the paper clip. You want a short hook to insert into the grill. 2.
Troubleshooting If you’re having trouble, check out these tips... If there is no power, check to see if... • The power cord is plugged into both the IEC socket on the rear panel of the unit and into the AC mains. • The AC mains voltage is matched to the operating voltage requirements (see Changing Voltage in the Connecting Your System section on page 6).
The sound quality changes... • Repeat the steps in the Troubleshooting section above before continuing to the next steps. • Disconnect the signal cable at the unit’s input. With power on, place your ear close to each driver (tweeter/woofer) and listen for noise (i.e. a slight hiss or hum). If there's absolutely no sound whatsoever, it could be that one or more of the drivers (woofer, tweeter or both) is at fault. It's also possible that the problem lies somewhere in the electronics.
Shipping Instructions • For the safest possible return to KRK, please use the shipping carton and packaging in which your monitor was originally shipped. • KRK cannot be responsible for any damages incurred during the shipping process due to poor packing. Make sure to insure your shipment. • If your subwoofer is out of warranty and you would like consultation before servicing your product, please contact KRK/Gibson Pro Audio Customer Service at 1-800-444-2766 or by email at service@gibson.com.
Specifications Frequency Response SPL Low Frequency Driver Cabinet Dimensions (HxWxD) KRK10s 34Hz – 50Hz to 130Hz Variable 110dB Music and 113dB Peak 10” High Excursion Glass Aramid Composite Woofer 15” x 14” x 16 1/16” 38.2 cm x 35.5 cm x 40.8 cm Net Weight (each) 40.2 lbs. (18.24 kgs) AMPLIFIER Power Rating 150W RMS Input Impedance Balanced Unbalanced 10kohm 10kohm Signal to Noise T.H.
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