The hook-up and operation of the Subwoofer is the same for a Home Theater surround sound system or a stereo music system. The Subwoofer has its own built-in amplifier, so it works with any sound system. The Subwoofer’s own crossover network sends bass-only signals to the Subwoofer’s built-in amplifier. This lets the Subwoofer add extra bass to the output from your other speakers.
For simplicity, we call your Home Theater system’s or music system’s main speakers the Front speakers. We call your AV receiver, stereo receiver, or integrated amplifier the Receiver.
Placement: Your JENSEN Subwoofer must sit on the floor, preferably in a corner, to work properly. The floor and corner are actually a part of the Subwoofer’s design. Place your Subwoofer in the corner nearest your system’s electronic components to keep wire or cable runs short.
Controls & Connections:
- Power Cord – Plug the power cord into an AC wall outlet or other AC outlet capable of supplying at least 200 Watts.
- Power Switch – Turns the AC supply completely OFF or sets the Subwoofer to AUTO ON operation. In AUTO ON, the Subwoofer is in standby mode until it detects an audio signal input, then the Subwoofer turns on automatically. A few minutes after audio input signals cease, the Subwoofer automatically returns to standby mode.
- Power Indicator LED – This LED is unlit when the AC power switch is OFF. It glows RED when the subwoofer is in standby mode and GREEN when the subwoofer is on.
- FUSE 250V 2A – This fuse protects against internal and external faults. If the POWER switch is ON and the power indicator LED is unlit, unplug the power cord from the AC outlet and check the fuse by unscrewing the center piece from the holder. IMPORTANT- If the fuse is blown, replace it only with a fuse of the same type and current rating.
- L, R SPEAKER-IN and OUT Terminals – See Connection Option 1. These terminals are for making connections using speaker wire. If you use this option, do not use Option 2.
- LINE IN Jack – See Connection Option 2. This jack is for input connection using an audio cable. If you use this option, do not use Option 1.
- LOW PASS FREQUENCY Control – Adjusts the upper frequency limit for audio signals going to the subwoofer amplifier. This control helps you adjust the system's tonal balance.
- LEVEL Control – Balances the loudness of the Subwoofer relative to the Front speakers and compensates for room effects on the Subwoofer’s output.
Connecting your Subwoofer:
IMPORTANT – When you make connections, make sure that the power switches of all components, including the Subwoofer, are OFF.
- Speaker wire: Typical speaker wire has a pair of separate conductors with insulating jackets that are molded together. We recommend that you use 16-gauge speaker wire for hooking your Receiver to your Front speakers. To make connections to the Subwoofer in parallel with the Front speakers easier, the speaker wire connecting the Receiver to the Subwoofer can be smaller (higher gauge number), since the Subwoofer does not draw large amounts of power through these wires.
- Polarity: All speakers in a system must be connected with the same polarity. Speaker wire is marked for polarity so that you can identify which wire in the pair is which. Polarity is shown by a color stripe on the insulation, by ridges molded into the insulation, or by the colors of the wires – one copper and one silver. Strip the insulation from speaker wire ends to reveal the bare conductors before connecting to Receiver, Subwoofer or Speaker terminals.
IMPORTANT – Always connect the red (+) terminal on the Receiver to the red (+) terminal on the Subwoofer, and the black (-) terminal on the Receiver to the black (-) terminal on the Subwoofer. The same is true for hooking the Receiver outputs to the Front speakers: red (+) to red (+), and black (-) to black (-). Important: Use Option 1 or Option 2, not both.
OPTION 1. Connection with speaker wire: Connect speaker wires from the Receiver’s front left and right speaker outputs to the Subwoofer’s Speaker Level-In connections. Connect left channel to left input and right channel to right input. You have the option of connecting your main speakers to the speaker B outputs on your Receiver, if it is so equipped, or you also have the option of connecting your main speakers using the connections on the Subwoofer. This will pass the audio signal to your main speakers, except the low bass which will be produced by your Subwoofer. To use this connection option, connect your main speakers to the right and left outputs on the Subwoofer (see illustration 1). Be sure you take care to maintain proper signal polarity, red to red and black to black.
OPTION 2. Connection with audio cable: This connection uses a low level mono sub signal. This is usually found on receivers equipped with Dolby® Digital decoding. Locate the subwoofer output on the back of you receiver. Using a standard RCA cable connect the subwoofer output on the back of your receiver to the Line-In on the back of the subwoofer.
Adjusting the Subwoofer controls:
- Play a program on your system. Use a Dolby® Digital or Dolby® Prologic signal, or a music CD. Adjust the Receiver’s volume control for a comfortable sound level from the system speakers.
- Increase the Subwoofer’s LEVEL Control setting clockwise, so that you hear the deep bass. Adjust the control for a natural, musical balance that has plenty of deep bass sound when it’s actually present in the music.
- Listen carefully to bass voices and, if needed, adjust the LOW PASS FREQUENCY Control so that they sound natural. Setting the frequency too high will make deep voices soundly excessively “chesty” or resonant and will give the upper bass in music a “one-note” quality. Setting the frequency too low will make deep voices sound “thin” and will give the music a lack of “warmth.”
- Make fine adjustments until the program has satisfying and natural sound quality on both bass voices and music.