Infinity BU-120 Owner's Manual
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Infinity BU-120 Owner's Manual

Infinity owner's manual powered subwoofers bu-80, bu-120, bu-150
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See also: Service Manual
BU Series
Powered Subwoofers
Models BU-80, BU-120, BU-150
Owner's Manual
Part # 200230
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Summary of Contents for Infinity BU-120

  • Page 1 BU Series Powered Subwoofers Models BU-80, BU-120, BU-150 Owner’s Manual Part # 200230 ®...

  • Page 2: Risk Of Electric Shock

    NO USER SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL THIS INFINITY PRODUCT IS DESIGNED FOR 120-VOLT USE ONLY! FOR DETAILED SAFETY PRECAUTIONS, PLEASE SEE FOLLOWING PAGE IN THIS OWNER'S MANUAL FOR “IMPORTANT SAFETY INSTRUCTIONS.” L’éclair avec le symbole de la flèche, placé dans les limites dun triangel équilatéral est prévu pour avertir l’utilisateur de la présence de “tension dangereuse”...

  • Page 3: Important Safety Instructions

    Read Instructions – All the safety and operating instructions should be read before the product is operated. 2) Retain Instructions – The safety and operating instructions should be retained for future reference. 3) Heed Warnings – All warnings on the product and in the operating instructions should be adhered to.

  • Page 4: Unpacking The Subwoofer

    4 BU Series Powered Subwoofers – Owner’ s Manual NTRODUCTION The Infinity BU Series Powered Subwoofers have been designed to enhance the bass frequencies of any audio system. This subwoofer may be used with speakers of any size. Obviously, the greatest bass enhancement will be achieved when the subwoofer is connected with speakers that do not have the capability to create deep bass.
  • Page 5 Should you have questions relating to your installation, it is advisable to call either TRONGLY NFLUENCE your dealer or Infinity’ s Customer Service Department for advice. ERFORMANCE The performance of the subwoofer is directly related to its placement in the listening room and how you align the subwoofer with its satellite speakers.
  • Page 6 As a starting point, initially place the subwoofer behind your right-channel satellite speaker, about 3 or 4 inches from the wall. We suggest trying this location first because in an orchestra, the bass instruments are usually located in the back and to the right (see Figure 1).
  • Page 7 ONTROLS Refer to Figure 2 to identify the controls of your subwoofer’ s internal amplifier: EFORE ONNECTING Turn off your entire audio system prior to connecting your subwoofer. UBWOOFER Connect your subwoofer to an unswitched AC wall outlet. Figure 2. DENTIFICATION OF AC P ONNECTING...
  • Page 8 10 feet in length. Instead, try using the high-level connection methods listed on page 10. OUTPUTS RIGHT UBWOOFER (Preamp with two sets of outputs) TO SATELLITE SPEAKER AMPLIFIER LEFT + L – – R + SPKR SPKR SUBWOOFER PLATE...
  • Page 9 (see Figure 4). SUB OUT OUTPUTS To Left To Right LEFT Female-to-Male “Y” Connector UBWOOFER CONT TO SATELLITE SPEAKER AMPLIFIER + L – – R + Low-Level In SPKR SPKR SUBWOOFER PLATE (Preamp with one set of outputs) + L –...
  • Page 10 Use speaker wire, maintaining proper polarity (+ to + and – to –). Attach the speaker wire to the left and right HIGH-LEVEL INPUTS on the subwoofer and the other ends to the proper left and right OUTPUTS on your amplifier or receiver (see Figure 5).
  • Page 11 Figure 7. Method when connecting one subwoofer to satellites. Figure 8. Method when connecting two subwoofers to satellites. MPORTANT ONNECTING AMPLIFIER OUTPUTS LEFT – – SPKR SPKR – Rear View L. SATELLITE Depending on whether you are using one or two subwoofers, connecting your satellites can be accomplished in one of two ways.

  • Page 12: Operation

    Some possible starting points include: behind the right channel satellite speaker, along the back wall between the satellites, along a side wall (but not too close to a corner), or behind a couch or a chair.

  • Page 13: A Word Of Advice

    ORD OF DVICE The Low-Frequency Roll-off and Volume controls may be set anywhere within their rotation. However, it will be a most unusual circumstance if you have to set the Volume control completely clockwise. This may indicate an unbalanced condition in your system (too much bass) or an especially large room or room placement may not be correct.

  • Page 14: Care Of Your Subwoofer

    If everything seems to be in good working order and the subwoofer still malfunctions, DO NOT ATTEMPT ANY REPAIRS! Contact your Infinity dealer and get the name of the authorized Infinity service center near you. If there is no facility near you, contact Infinity's Customer Service Department at (800) 553-3332, or write: Infinity Systems, Inc.

  • Page 15: Specifications

    BU-80 8" 50Hz ~ 150Hz (continuously variable) (continuously variable) Ebony Pica 11-1/2" (29.2cm) 11-1/2" (29.2cm) 11-1/2" (29.2cm) 26 lbs/11.8 kg ERIES BU-120 BU-150 30Hz ~ 150Hz 28Hz ~ 150Hz 150W 200W 12" 15" 50Hz ~ 150Hz 50Hz ~ 150Hz (continuously variable)
  • Page 16 ® Infinity Systems, Inc. 250 Crossways Park Drive Woodbury, NY 11797 USA (516) 496-3400 • FAX (516) 682-3523 P/N: 200230...

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