Transcript
965/75 MANUAL 11/99rev1
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VR965 VR975 Lynnfield VR™ Series
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Regulatory Compliance Statements American Users: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio or television reception. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: 1.
Reorient or relocate the receiving antenna.
2.
Increase the separation between the equipment and receiver.
3.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
4.
Consult the dealer or an experienced radio/TV technician for help.
Canadian Users: This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of Industry Canada. Caution! Disconnect power before servicing. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par Industrie Canada. Attention! Couper le courant avant’entretien.
Declaration of Conformity Konformitätserklärung Déclaration de Conformité Declaración de Conformidad Verklaring de Overeenstemming Dichiarazione di Conformità
We/Wir/Nous/WIJ/Noi: Boston Acoustics, Inc. 300 Jubilee Drive, Peabody, MA 01960 U.S.A. declare under sole responsibility that the product VR965/975 to which this declaration relates, is in conformity with the following standards or other normative documents: auf das sich diese Erklärung bezieht, mit der/den folgenden Norm(en) oder Richtlinie(n) übereinstimmt: auquel se réfère cette déclaration est conforme à la (aux) norme(s) ou au(x) document(s) normatif(s): al que se refiere esta declaración es conforme a la(s) norma(s) u otro(s) documento(s) normati-
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vo(s): waarnaar deze verklaring verwijst, aan de volende noem(en) of richtlijn(en) beantwoordt: a cui si riferisce questa dichiarazione è conforme alla/e sehuente/i norma/o documento/i normativo/i:
European Users: This equipment has been tested and found to comply with the following European directive: (i) EMC Directive 89/336/EEC amending directive 92/31/EEC 93/68 EEC as per EN 50081-1: 1992 according to EN55013: 1990 Class B EN50082-1: 1997 according to EN61000-4-2: 1995 EN61000-4-3: 1997 EN61000-4-4: 1995 (ii) Low Voltage Directive (Safety) 72/23/EEC as per EN60065: 1993
Japanese Users: This equipment is in the Class 2 category (Information Technology Equipment to be used in a residential area or an adjacent area thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment aimed at preventing radio interference in such residential areas. When used near a radio or TV receiver, this equipment may become the cause of radio interference. Read the instructions for correct handling.
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Australian and New Zealand Users: N-93
This device has been tested and found to comply with the limits for a Class B digital device, pursuant to the Australian/New Zealand standard AS/NZS 3548 set out by the Spectrum Management Agency. Caution! Disconnect power before servicing.
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Specifications
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VR975
VR965
Frequency Response (±3dB)
25–20,000Hz
29–20,000Hz
Recommended Amplifier Power
15–200 watts
15–150 watts
Nominal Impedance
8Ω
8Ω
Sensitivity [1 watt (2.83v) at 1m]
91dB
90dB
Subwoofer Amplifier Power
125 watts RMS
80 watts RMS
Bass Unit
10" (250mm) DCDTM
8" (200mm) DCDTM
Passive Radiator
12" (305mm)
—
1
Midrange
Dual 4 ⁄2" (115mm)
41⁄2" (115mm)
Tweeter 1" (25mm)
anodized aluminum
anodized aluminum
Crossover Frequency
2500Hz
2600Hz
1
1
Dimensions (HxWxD)
48 ⁄4 x 6 ⁄2 x 15" (1118 x 165 x 381mm)
421⁄2 x 61⁄2 x 14" (1016 x 165 x 356mm)
Foot Width
113⁄8" (290mm)
113⁄8" (290mm)
Weight
70 lbs (32kg)
50 lbs (23kg)
Finish
Charcoal gray cloth with gloss black top
Charcoal gray cloth with gloss black top
Description The Lynnfield VR965 and VR975 deliver accurate, wide-range performance that conveys all the power and impact of the most demanding program material. These floorstanding speakers combine integrated powered subwoofers with Boston-built midranges and tweeters into sleek cabinets that blend gracefully in any listening room. Both models feature high-current subwoofer amplifiers driving our long-excursion, Deep Channel Design (DCDTM) bass units for deep, authoritative low frequencies. In addition, they both feature BassTracTM, a proprietary new Boston-designed circuit that tracks the input signal to the subwoofer and prevents its amplifier from being driven into audible distortion. Unlike conventional limiters, BassTrac preserves the waveform’s shape, maintaining the fidelity of the signal. The benefit: The bass stays clean and strong at any listening level. For user convenience, an auto on/off function turns the subwoofer amplifier on when a bass signal is sensed, and turns it off approximately fifteen minutes after the last signal is received. Our midrange units feature copolymer cones, butyl rubber surrounds, and a computeroptimized magnet structure for smooth, accurate midrange reproduction. A 1" (25mm) anodized aluminum Lynnfield VR tweeter, with our exclusive Amplitude Modification Device (AMD), produces extended, sparkling high frequencies. The cabinets are constructed of Medium Density Fiberboard (MDF), chosen for its outstanding acoustic characteristics, and have extensive internal bracing. The result is superb structural integrity that eliminates the spurious resonances and vibration that degrade the sound of ordinary speakers. MagnaGuard® magnetic shielding ensures the speaker’s magnetic field does not interfere with the television’s picture, allowing placement next to a TV in a home theater system. 5
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How to Connect Your Speakers Correctly wiring your speakers is important for achieving the best sound quality. Wiring should take just a few minutes, but it’s important to do it carefully, since incorrect wiring (such as reversed connections) can result in a poor soundstage and poor bass. We recommend 18-gauge wire or thicker for runs up to 25 feet (8 meters) and 16-gauge wire or thicker for longer runs. Separate the first few inches of the wire conductors. Strip off 1/2-inch (12mm) of insulation from the ends of each speaker wire to expose the two conductors and tightly twist the wire strands. WARNING: To prevent electrical shock hazard, always switch off your amplifier or receiver when making connections to the speaker. After wiring your speakers, plug them into an AC wall outlet. We recommend you do not plug them into a switched outlet on the back of your receiver or into a power strip that will be turned on and off.
IMPORTANT: Typically, one side of the wire is smooth. Connect this side to the – (black) connection. The other side has a rib or stripe. Connect this to the + (red) connection.
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Using the five-way binding posts: The binding posts permit easy connection to banana plugs, spade lugs, and bare wire. Insert the wire in the hole and tighten.
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Connecting the VR965 or VR975 to Stereo or Dolby® Pro Logic® Systems For stereo or Dolby Pro Logic systems, the easiest method is to use speaker wire connections as shown. You may also use the “sub out” connection from your receiver to the input on the speaker marked “sub in,” but you will need RCA cables and a Y-connector to split the “sub out” signal between the two speakers (see illustration on page 8).
on/standby
bass/sub
on/standby
sub in
left
center
bass/sub
sub in
right
Subwoofer out
Be sure to connect + to + (red) and – to – (black).
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Connecting the VR965 or VR975 to Digital Theater Systems Digital 5.1 home theater electronics dedicate one channel (the “.1” of 5.1) to reproduce the special low-frequency information (such as explosions and thunder) contained in digital-encoded soundtracks. Use RCA cables and a Y-connector (not included) as shown to connect your digital receiver’s subwoofer output to the speakers. Select “subwoofer-yes” from your receiver’s set-up menu. Hooked up this way, the receiver’s amplifier is relieved of having to reproduce the difficult low bass signals that can drive the receiver into audible distortion. In addition, the LFE signal will be cleaner, since it is taken directly from the pre-amp/processor section of the receiver and doesn’t pass through an additional layer of circuitry (the receiver’s amplifier) before going to the speaker. Generally, you will get the best results by selecting “small” for the front left and right speakers from your receiver’s set-up menu. However, we suggest you try both settings (“small” and “large”) to see which sounds best with your particular receiver. If you do not wish to run RCA cables to your speakers, you may configure your electronics to send the LFE signal along with the left and right channel signal using the speaker wire connection (see illustration on page 7). Select “subwoofer-no” from your receiver’s set-up menu. This sends the LFE signal to the main left and right speakers. Consult your system electronics owner’s manual for more details.
on/standby
bass/sub
on/standby
sub in
left
center
bass/sub
right
Subwoofer out
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sub in
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Checking the Speaker Connections It is important that your speakers are hooked up with similar polarity, or “in phase.” A simple listening test will tell you if your speakers are connected properly. While listening to music with your amplifier set to MONO, reverse the speaker wire connections at one speaker only. You’ll hear a dramatic change in sound. The connection that yields the fuller bass and louder sound is correct. Bass/Sub Control This control adjusts the amount of deep bass produced by the speakers. Use this control to increase or decrease the bass level to compensate for the effects of room placement or personal taste. NOTE: The most musically accurate response will be obtained when the control is in approximately the 9:00 o’clock position.
on/standby
bass/sub
sub in
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How to Place Your Speakers As a starting point, place the speakers 6 to 12 feet (2-4m) apart, so they form a triangle with your favorite listening position. The speakers should be at least 2 feet (0.6m) from the corners of the room. Placement near the walls or corner will reinforce the bass. Placement too far away from the walls or corner may result in a “thin,” bass-shy balance. Putting the speakers too close to a corner can produce an unnatural bass reinforcement that detracts from their balanced, uncolored sound. If a speaker must be placed near a corner, move it away from the wall directly behind it to preserve its natural tonal balance. Use the bass/sub control to obtain the best balance in your room. Generally, the best results will be obtained when the woofers face out, away from each other. However, the nondirectional nature of bass propagation means that either orientation will produce satisfactory results. If you do place the woofers facing in, make sure they have at least six inches of “breathing room” from the furniture or TV stand for proper bass reproduction.
Center channel flush with front of TV
Right speaker
Left speaker
Place the surround speaker beside or behind the listeners
6-12 ft. (2-4m)
10
5-9 ft. (1.5-3m)
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Listening Levels and Power Handling The listed power recommendations assume you will operate your system in a way that will not produce distortion. Even these rugged systems can be damaged by a modest amplifier if it produces distortion. If you hear a harsh, gritty noise, turn down the volume. Prolonged or repeated operation of your speaker with a distorted signal can cause damage that is not covered by the warranty.
Limited Warranty For five years from the date of purchase, Boston Acoustics will repair for the original owner any defect in materials or workmanship that occurs in the drivers (woofer, midrange, tweeter) of the VR965 or VR975, without charge for parts and labor. For one year from the date of purchase, Boston Acoustics will repair for the original owner any defect in materials or workmanship that occurs in the amplifier of the VR965 or VR975, without charge for parts and labor. Your responsibilities are to use the system according to the instructions supplied, to provide safe and secure transportation to an authorized Boston Acoustics service representative, and to present proof of purchase in the form of your sales slip when requesting service. Excluded from this warranty is damage that results from abuse, misuse, accidents, shipping, repairs, or modifications by anyone other than an authorized Boston Acoustics service representative. This warranty is void if the serial number has been removed or defaced. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
If Service Seems Necessary First, contact the dealer from whom you purchased the speakers. If that is not possible, write to: Boston Acoustics, Inc. 300 Jubilee Drive Peabody, MA 01960 U.S.A. 978.538.5000 We will promptly advise you of what action to take. If it is necessary to return your speaker to the factory, please ship it prepaid. After it has been repaired, we will return it freight prepaid in the U.S.A. and Canada.
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VR, BassTrac, and DCD are trademarks and MagnaGuard, Boston, and Boston Acoustics are registered trademarks of Boston Acoustics, Inc. Dolby and Pro Logic are registered trademarks of Dolby Laboratories Licensing Corporation.
300 Jubilee Drive Peabody, MA 01960 U.S.A. 978.538.5000 www.bostonacoustics.com
© 2000 Boston Acoustics, Inc. All rights reserved. Specifications subject to change without notice. 42-001013-1
