Infinity Beta 20 BookShelf Speakers Owner’s Guide

Infinity Beta 20 BookShelf Speakers

INFINITY BETA SERIES

The Infinity Beta™ Series of loudspeakers continues Infinity’s longstanding commitment to accurate sound reproduction. Our patented Ceramic Metal Matrix Diaphragm (CMMD™) drivers, precision dividing networks, and rigid, well-braced enclosures, along with our newly developed, patent-pending Constant Acoustical Impedance™ (CAI™) waveguide, combine to deliver uncompromised performance in any stereo or multichannel home theater system. In addition, Beta Series speakers are magnetically shielded for safe placement adjacent to a television.

UNPACKING THE SPEAKERS

If you suspect damage from transit, report it immediately to your dealer. Keep the shipping carton and packing materials for future use.

PLACEMENT

Stereo

Before deciding where to place your Beta speakers, survey your room and think about placement, keeping the following points in mind, using Figure 1 as a guide:

• For best results, place the speakers 6’– 8′ (1.5m–2.5m) apart.
• Position each speaker so that the tweeter is approximately at ear level.
• Generally, bass output will increase as the speaker is moved closer to a wall or corner.
• Refer to “Home Theater” below if you also plan to use the speakers for home theater reproduction.

Figure 1. Experiment with speaker placement to obtain the best bass level and stereo imaging in your room.

Home Theater

• For front-channel use, place one speaker on the left and another on the right, along either side of the television monitor. Since the speakers are magnetically shielded, you can place them near the TV without worrying about the field distorting the TV picture.
• For surround-channel use, place speakers on bookshelves or stands alongside the listening position. Final placement depends on room acoustics, availability of space and your listening preference (Figures 2 and 3).
• In 6- or 7-channel configurations, place the rear channel(s) behind the listening position, as shown in Figures 2 and 3.

NOTE: An Infinity powered subwoofer will add impact and realism to both music and film soundtracks. Contact your Infinity dealer for recommenda-tions on subwoofer models for your application.

Figure 2. This overhead view shows a typical home theater plan. Left/right rear channels are for a 7-channel system. Center rear channel is for a 6-channel system.

Figure 3. This figure shows an alternate layout, which may be more suitable for some rooms. Left/right rear channels are for a 7-channel system. Center rear channel is for a 6-channel system.

INSTALLING FEET

Beta 40 and Beta 50

These models feature four rubber feet that enable them to be placed on a smooth-surfaced floor, such as tile or hardwood. Four metal spikes are supplied for use when the speaker is to be placed on a carpeted surface to decouple the speaker from the floor and prevent unwanted damping.To insert the spikes, gently lay the speaker on its side (not its front or back) on a soft, nonabrasive surface. Each spike screws into the threaded insert in the center of each rubber foot. Make sure all four spikes are screwed in completely for stability.

NEVER drag the speaker to move it, as this will damage the spikes, the feet and/or the wood cabinet itself. Always lift the speaker and carry it to its new location.

CAUTION: Floorstanding (tower) loudspeakers have a high center of gravity and may become unstable and tip over during earthquakes, or if rocked, tipped or improperly positioned. If this is a concern, these speakers should be anchored to the wall behind them, using the same procedures and hardware customary for anchoring bookcases and wall units.The customer is responsible for proper installation and proper selection of hardware.

WIRING THE SYSTEM

• IMPORTANT: Make sure all equipment is turned off before making any connections.
• For speaker connections, use a high-quality speaker wire with polarity coding.The side of the wire with a ridge or other coding is usually considered positive polarity (i.e., +).
• NOTE: If desired, consult your local Infinity dealer about speaker wire and connection options.
• The speakers have coded terminals that accept a variety of wire connectors.The most common connection is shown in Figure 4.
• To ensure proper polarity, connect each + terminal on the back of the amplifier or receiver to the respective + (red) terminal on each speaker, as shown in Figure 5. Connect the – (black) terminals in a similar way. See the owner’s guides that were included with your amplifier, receiver and television to confirm connection procedures.
• IMPORTANT: Do not reverse polarities (i.e., + to – or – to +) when making connections. Doing so will cause poor imaging and diminished bass response.

Figure 4. This figure shows how to connect bare wires to the terminals.

Beta 10, Beta 20, Beta C250 and Beta C360

Figure 5. Wiring diagram shows polarity connections for one channel of a stereo or home theater system.

Figure 6. This example shows how to connect bare wires to the terminals. Banana plugs may also be inserted directly into the rear of the connector.

Figure 7. Wiring diagram shows polarity connections for one channel of a stereo or home theater system.

BI-WIRING

The outer connection panel and internal dividing network of the Beta 40 and Beta 50 are designed so that separate sets of speaker cables can be attached to the low-frequency transducer and midrange/high-frequency transducer portions of this dividing network.This is called bi-wiring. Bi-wiring can provide several sonic advantages and considerably more flexibility in power amplifier selection.

1. Loosen the terminals and remove strapping bars.
2. Insert the speaker wire for the high frequencies into the top set of terminals and tighten.
3. Insert the speaker wire for the low frequencies into the bottom set of terminals and tighten.

Single-Stereo Amplifier

Dual-Stereo Amplifier

FINAL ADJUSTMENTS

• Check the speakers for playback, first by setting the system volume control to a minimum level, and then by applying power to your audio system. Play a favorite music or video segment and increase the system volume control to a comfortable level.
  • NOTE: You should hear balanced audio reproduction across the entire frequency spectrum. If not, check all wiring connections or consult the authorized Infinity dealer from whom you purchased the system for more help.
• The amount of bass you hear and the stereo-image quality will be affected by a number of different factors, including the room’s size and shape, the construction materials used to build the room, the listener’s position relative to the speakers, and the position of the speakers in the room.
• Listen to a variety of music selections and note the bass level. If there is too much bass, move the speakers away from nearby walls. Conversely, if you place the speakers closer to the walls, there will be more bass output.
• Nearby reflecting surfaces can adversely affect stereo-imaging quality. If this happens, try angling the speakers slightly inward toward the listening position until the optimum effect is achieved.

CARE OF YOUR SPEAKER SYSTEM

Each Beta Series enclosure has a wood-grain-vinyl finish that does not require any routine maintenance. When needed, use a soft cloth to remove any fingerprints or dust from the enclosure or grille.

NOTE: Do not use any cleaning products or polishes on the cabinet or grille.

SPECIFICATIONS

Beta 10:

• Frequency Ranges: 60Hz – 20kHz (±3dB), 55Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 125 Watts
• Sensitivity: 88dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 2.8kHz; 24dB/octave
• Low-Frequency Driver(s): 5″ (130mm) CMMD, 6-1/2″ (165mm) CMMD, Dual 6-1/2″ (165mm) CMMD, magnetically shielded
• Mid-Frequency Driver: NA
• High-Frequency Driver: 1″ (25mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 11-13/16″ x 7-1/2″ x 11-7/16″ (300mm x 190mm x 290mm)
• Weight: 14 lb (6.4kg)

Beta 20:

• Frequency Ranges: 58Hz – 20kHz (±3dB), 52Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 150 Watts
• Sensitivity: 90dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 2.4kHz; 24dB/octave
• Low-Frequency Driver(s): 6-1/2″ (165mm) CMMD, magnetically shielded
• Mid-Frequency Driver: NA
• High-Frequency Driver: 1″ (25mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 13-3/4″ x 8-7/8″ x 13″ (350mm x 225mm x 330mm)
• Weight: 20.7 lb (9.4kg)

Beta 40:

• Frequency Ranges: 45Hz – 20kHz (±3dB), 40Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 200 Watts
• Sensitivity: 91dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 600Hz, 3.2kHz; 24dB/octave
• Low-Frequency Driver(s): Dual 6-1/2″ (165mm) CMMD, magnetically shielded
• Mid-Frequency Driver: 5″ (130mm) CMMD, magnetically shielded
• High-Frequency Driver: 1″ (25mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 37″ x 9-13/16″ x 13-1/8″ (950mm x 250mm x 333mm)
• Weight: 50.2 lb (22.8kg)

Beta 50:

• Frequency Ranges: 35Hz – 20kHz (±3dB), 30Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 250 Watts
• Sensitivity: 91dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 600Hz, 3.3kHz; 24dB/octave
• Low-Frequency Driver(s): Dual 8″ (200mm) CMMD, magnetically shielded
• Mid-Frequency Driver: 5″ (130mm) CMMD, magnetically shielded
• High-Frequency Driver: 1″ (25mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 41-5/16″ x 10-7/16″ x 14-11/16″ (1050mm x 265mm x 372mm)
• Weight: 62.5 lb (28.4kg)

Beta C250:

• Frequency Ranges: 55Hz – 20kHz (±3dB), 50Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 150 Watts
• Sensitivity: 90dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 2.4kHz; 24dB/octave
• Low-Frequency Driver(s): Dual 5″ (130mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 6-11/16″ x 17″ x 8-3/8″ (170mm x 430mm x 212mm)
• Weight: 16 lb (7.3kg)

Beta C360:

• Frequency Ranges: 45Hz – 20kHz (±3dB), 40Hz – 40kHz (–6dB)
• Recommended Amplifier Power Range: 10 – 200 Watts
• Sensitivity: 91dB (2.83V @ 1 meter)
• Nominal Impedance: 8 ohms
• Crossover Frequency: 500Hz, 3.2kHz; 24dB/octave
• Low-Frequency Driver(s): Dual 6-1/2″ (165mm) CMMD, magnetically shielded
• Mid-Frequency Driver: 4″ (100mm) CMMD, magnetically shielded
• High-Frequency Driver: 1″ (25mm) CMMD, magnetically shielded
• Dimensions (H x W x D): 8-1/2″ x 25-5/8″ x 11-3/4″ (215mm x 650mm x 298mm)
• Weight: 34.5 lb (15.7kg)

Declaration of Conformity

We, Harman Consumer International 2, route de Tours 72500 Chateau-du-Loir France

Declare in our own responsibility that the products described in this owner’s manual are in compliance with technical standards:

• EN 50081-1:1992
• EN 50082-1:1997

Signed by: Robin Marshall Harman Consumer International Chateau-du-Loir, France Date: 11/03

• © 2003 Harman International Industries, Incorporated

Infinity Systems

• Address: 250 Crossways Park Drive, Woodbury, NY 11797 USA
• Phone: 516.674.4INF (4463)
• Website: www.infinitysystems.com
• Infinity is a registered trademark , and Infinity Beta and CMMD (patent nos. 6,327,372 and 6,404,897 ) are trademarks of Harman International Industries, Incorporated.
• Part No. TK 11/03
• H A Harman International Company

FAQs

What makes the Infinity Beta Series speakers special?

The Infinity Beta Series speakers are known for their accurate sound reproduction. They feature patented Ceramic Metal Matrix Diaphragm (CMMD) drivers, precision dividing networks, well-braced enclosures, and a patent- pending Constant Acoustical Impedance (CAI) waveguide for uncompromised performance. These speakers are also magnetically shielded for safe placement near a television.

What should I do if I suspect shipping damage to the speakers?

If you suspect damage during transit, report it immediately to your dealer, and keep the shipping carton and packing materials for future use.

How should I place the Beta speakers for stereo use?

For stereo use, it's recommended to place the speakers 6 to 8 feet apart. Ensure that the tweeter is approximately at ear level for the best results. Adjusting the distance from the wall can affect bass output.

How should I set up the Beta speakers for home theater use?

For front-channel use, place one speaker on the left and another on the right, beside the television monitor. For surround-channel use, position the speakers on bookshelves or stands near the listening position. The exact placement depends on room acoustics and your preferences.

Can I use Beta speakers in a 6- or 7-channel home theater configuration?

Yes, in 6- or 7-channel configurations, place the rear channel(s) behind the listening position for an immersive home theater experience.

How do I install the feet on Beta 40 and Beta 50 models?

Beta 40 and Beta 50 models come with four rubber feet for smooth surfaces and metal spikes for carpeted surfaces. To insert the spikes, gently lay the speaker on its side and screw each spike into the threaded insert on the rubber feet. Be cautious not to drag the speaker to prevent damage

What's the importance of proper wiring for these speakers?

Using high-quality speaker wire with polarity coding is essential. Ensure the correct polarity (positive to positive and negative to negative) when connecting the speakers to your amplifier or receiver. Reversing polarities can lead to poor audio quality.

Is bi-wiring possible for Beta 40 and Beta 50?

Yes, Beta 40 and Beta 50 models support bi-wiring. You can attach separate sets of speaker cables to the low-frequency and midrange/high-frequency transducers. This offers sonic advantages and flexibility in power amplifier selection.

What should I do for final adjustments after setting up the speakers?

After initial setup, gradually increase the system volume control to a comfortable level and listen to various music selections. Ensure balanced audio reproduction across the frequency spectrum. Adjust the placement and angle of the speakers as needed for optimal sound.

How should I care for my Beta Series speaker system?

The wood-grain-vinyl finish on Beta Series enclosures requires minimal maintenance. Use a soft cloth to remove fingerprints or dust from the enclosure or grille. Avoid using cleaning products or polishes on the cabinet or grille.

Can I use the Infinity Beta 20 Bookshelf Speakers with a subwoofer?

Yes, adding an Infinity powered subwoofer can enhance the bass impact and realism of both music and film soundtracks when used in conjunction with the Beta 20 Bookshelf Speakers. You can contact your Infinity dealer for recommendations on subwoofer models that suit your application.

How do I connect the Beta 20 Bookshelf Speakers to my audio system?

To connect the speakers, use high-quality speaker wire with polarity coding. Connect the + (red) terminal on the back of your amplifier or receiver to the respective + terminal on each speaker, and do the same for the - (black) terminals. Ensure proper polarity to maintain good audio quality.

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