Features
Controls
Connections

Features

BASH Digital Hybrid Class AB Amplifier: The Klipsch SW-311 powered subwoofer features a highly efficient BASH digital hybrid class AB amplifier which produces reliable, high-powered sound. The built-in amplifier is rated at 500 watts RMS (1200 watts Peak). The RMS power rating indicates power available on a continuous, long-term basis. The Peak power rating indicates power available for large, short-term peaks in your music or movie soundtrack.

Digital Sound Processing: The Klipsch SW-311 utilizes internal digital sound processing for optimum sound at all volume levels.

10" Fiberglass Woofer: The Klipsch SW-311 powered subwoofer features a front-firing highly damped, non-resonant 10" woven fiberglass driver for tight musical bass. The woofer employs a large 4-layer aluminum-wound voice coil for high volume output.

Passive Radiator Design: The Klipsch SW-311 powered subwoofer features a passive radiator design which employs dual side-firing highly damped, non-resonant 10" woven fiberglass passive radiators for greater bass reproduction.

Computer Optimized Surrounds: The SW-311's woofer & passive radiators utilize computer optimized rubber surrounds for tighter bass.

Power LED Indicator: Located on the powered subwoofer's front baffle, this LED indicates the operating status of the unit's built-in amplifier. The LED will light red when the amplifier is in standby mode and green when the amplifier is on and receiving a signal. If the LED is dark and not lit, the amplifier is off.

Rubber Feet: The Klipsch powered subwoofer is equipped with four integrated rubber feet to help prevent against vibration.

Placement: Klipsch powered subwoofers are designed to reproduce deep bass and deliver the impact that makes your movies and music come alive. Typically, optimum performance will result if you place the subwoofer in  a corner of the room on the same wall as your front channel speakers.

Controls

Top-Panel Controls: All the subwoofer's controls, and changes to control settings are accessed through the keypad and display on the top of the subwoofer's cabinet. The top-panel display's brightness is adjustable to one of 4 levels.

Adaptive Room Correction: The included microphone and integrated Adaptive Room Correction II (ARC) technology optimizes the Klipsch SW-311 for any type of room. The adaptive room correction microphone (ARC-M1) plugs into the subwoofer's rear-panel 3.5mm mic input. The adaptive room correction process is controlled by the subwoofer's top-panel keypad. The unit will measure and analyze your room's acoustics versus the subwoofer's characteristics and apply adaptive room correction to provide optimal bass performance for your specific room environment.

Volume Control: You can use the left/right keys on the top-panel keypad to adjust the subwoofers volume level to match the output of your system's main speakers.

EQ Mode: The Klipsch SW-311 offers three different EQ modes to provide bass emphasis. You can select from Punch, Depth, or Flat. Each is designed to complement different types of audio material, such as movie soundtracks or music. The Punch setting emphasizes the 55Hz region, while the depth setting boosts the 30Hz range. The Flat setting defeats the Punch and Depth setting for a flatter frequency response.

Lowpass Crossover: The Klipsch SW-311 powered subwoofer features a variable lowpass crossover which is adjustable from 40-150Hz. The crossover point chosen determines where low bass frequencies are "handed-off" from your AV system's loudspeakers to the Klipsch powered subwoofer. Set the crossover point based on the size of your systems' main left/right speakers. As a general rule, for larger, floor-standing speakers, set the crossover point between 50-90Hz. If using small bookshelf or satellite speakers for your mains, set the crossover point between 90-150Hz. The smaller the speaker, the higher the setting until the bass frequencies blend well between the loudspeakers and the Klipsch powered sub. If setting the crossover point in the receiver, turn the Lowpass Filter off.

Lowpass Slope: The lowpass slope function is used to adjust how aggressively the subwoofer rejects frequencies above the low pass filter's setting. There are four settings to choose from - 18, 24, 36, and 48 dB/octave. The higher the number the more the upper frequencies are removed from the subwoofer's output.

Phase: The Klipsch SW-311 powered subwoofer has an adjustable phase control which can be set between 0° and 180°. This control is used to acoustically match the subwoofer's output to your system's main speakers. Select a position between 0° and 180°, in which the subwoofer has more output at your main listening position.

Saved Presets: You can store all of the subwoofer's audio control settings (Room Correction, Volume, EQ, Lowpass, Phase) in one of five memory presets - Music, Movie, Night, User 1, and User 2. This way you can save and recall grouped audio settings for different audio content.

Auto On: You can select Auto On or Always On. The Auto-On Circuit turns the amplifier on when an audio signal is detected and off after approximately 20 minutes with no input signal.

IR Sensor: An infrared remote control sensor is included on the front of the subwoofer for integration with A/V remote control systems. The IR codes for this subwoofer can be obtained by visiting the Klipsch website.

Connections

Line-Level Input: The Klipsch SW-311 powered subwoofer is equipped with a pair of line-level RCA-type inputs. Most of today's AV receivers have a line-level subwoofer output (LFE) labeled Subwoofer Pre Out, Sub Out, or SW Out. If your receiver has this output, connect on end of a subwoofer cable to it and connect the other end of the cable into the powered subwoofer's line-level input labeled "LEFT/LFE". This connection allows the subwoofer to operate with both music and surround sound movies. In absence of a subwoofer (LFE) output on your receiver, as an alternative hookup, you can connect Left & Right channel pre-amp outputs from a receiver to the "Left/LFE" and "Right" input on the powered subwoofer.

Line-Level Output: The SW-311's mono line-level (RCA-type) output can be used as an alternate method of connecting a second powered subwoofer in  your home theater system. The signal output from this mono RCA jack is effected by the Volume, EQ, Lowpass, Phase, and Room Correction settings of this subwoofer. The advantage of this, is the ability for the Klipsch SW-311's Adaptive Room Correction function to correct the response of the second subwoofer, resulting in a more accurate response.

USB (type-B): This computer interface allows access to additional advanced features within the subwoofer's room correction software. Optional, proprietary Klipsch software and a higher level of technical knowledge are required to correctly utilize this capability. This port can also function as an alternative control interface with A/V control systems that can utilize a USB hookup.

12-Volt Trigger: The SW-311 features a 12-volt trigger input (3.5mm) which turns on the powered subwoofer when a 12-volt trigger signal from a connected receiver is detected.

WA Port (optional): The Klipsch powered subwoofer is fitted with a proprietary 4-pin "WA-Port" connector for wireless operation, using Klipsch's optional WA-2 wireless subwoofer kit (714WA2, sold separately). The Klipsch WA-2 wireless subwoofer kit consists of two components; a wireless Transmitter & wireless Receiver. The WA-2 wireless subwoofer kit makes adding the Klipsch powered subwoofer to your home theater system much easier, because it replaces the need for a separate subwoofer cable that traditionally must be connected between the receiver and the powered sub. Now, you can easily place your powered subwoofer where it both sounds and looks best in the room since you're not restricted by an audio cable.