Infinity L-MPS - User Manual

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Technical Manual

SPECIFICATIONS

Minuette Center

L-MPS Satellite/Center

INFINITY SYSTEMS INC., 80 Crossways Park West, Woodbury, New York 11797

REV A

11-97

WIRING DIAGRAMS

Nominal Impedance: 8 ohm

Max Amp Power: 80 watts

Frequency response: 150Hz - 20kHz

Sensitivity: 87 dB SPL (1 watt @ 1 meter)

Crossover Frequency: 5kHz

System Aural Sweep Test: 6.3V Input 20Hz to 20 kHz

L. F. Aural Sweep Test: 6.3V Input 20Hz to 1.2 kHz

H. F. Aural Sweep Test: 6.3V Input 1.2 kHz to 20 kHz

Cabinet: Minuette Center/L-MPS Center (A010-7911) Blk

L-MPS Satellite (J1162BA) Blk

Grille:

Front baffle:

Low Frequency 902-7548 3-1/2" (80mm)

Transducer: Paper Cone Woofer, Shielded

DC Resistance: 3.5 ohm +/- 10%

High Frequency 1/2" (12.7mm)

Transducer: Pure Titanium Compression Driver

with acoustic lens

DC Resistance: 3.5 ohm +/- 10% Aluminum Wire

Crossover Network:

XXX

XXXXXXXXXXXXXXX

XXX XXXXXXXXXX

XXXXXXXXXXXXXX

XXX XXXXXXX

XXXXXXXXXX XXXXXXXXXXXXXXXXX

XXXX

XXX

Minuette Center/L-MPS Center (A025-7913) Blk

L-MPS Satellite (J1163BB) Blk

Minuette Center/L-MPS Center (A028-7912) Blk

L-MPS Satellite (J1161BA) Blk

902-7549

Minuette Center/L-MPS Center (A015-7547)

L-MPS Satellite (E4170B)

ACOUSTIC & ELECTRICAL SPECIFICATIONS:

AURAL SWEEP TEST SPECIFICATIONS:

SYSTEM COMPONENTS:

Enclosure Dimensions: 10-7/16" x 4-3/4" x 3-3/4" deep

265mm wide x 119mm high x 94mm deep

Shipping Weight: 29 lbs. (13.2 kg) Theater Pac

XXXXXXXXXX XXXX

PHYSICAL SPECIFICATIONS:

Refer to the Warranty Statement packed with each product.

WARRANTY INFORMATION:

BLACK

WHITE

GREEN

BLACK

GREEN

RED

BLUE

NETWORK

(#E4170B)

NETWORK

(A015-7547)

BLUE

BLACK

RED

GREEN

WHITE

GREEN

BLACK

L2 1mH

C2 150 F/100Vµ

0.24mH

R1 4.7 5WΩ

C1 5.6 F/50Vµ

18 F/100Vµ

30 5W

Ω

L-MPS SATELLITE

MINUETTE CENTER / L-MPS CENTER

DRIVER

LOW FREQ.

902-7548

DRIVER

LOW FREQ.

902-7548

DRIVER

HIGH FREQ.

902-7549

DRIVER

HIGH FREQ.

902-7549

DRIVER

LOW FREQ.

902-7548

DRIVER

LOW FREQ.

902-7548

INPUT

H.F.

L.F.

SPEAKER

BASE

CENTER

SPEAKER BOX

#N1092A

POLY FOAM

SATELLITE

SPEAKER BOX

#P0147E

WARRANTY CARD

#P0148E

OWNER'S MANUAL

M4297MCS

CARTON BOX

The is in pairs,

and is part of the:

(4 L-MPS Satellites, 1 Center)

(2 L-MPS Satellites, 1 Center)

(an L-MPS Theater Pac and a BU-2 subwoofer)

L-MPS SATELLITE/CENTER

THEATER PAC

SURROUND PAC

CMS-2

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The Minuette Center and L-MPS Satellite/Center are compact loudspeaker systems designed for home theater and audio applications, offering a balance of performance and discreet aesthetics. These units are available individually or as part of larger home theater packages, such as the THEATER PAC (comprising four L-MPS Satellites and one Center speaker), the SURROUND PAC (two L-MPS Satellites and one Center speaker), and the CMS-2 (an L-MPS Theater Pac combined with a BU-2 subwoofer).

Function Description:

The Minuette Center and L-MPS Satellite/Center speakers are designed to reproduce audio across a broad frequency range, making them suitable for both music and movie playback. The Minuette Center, as its name suggests, is optimized for center channel duties in a surround sound setup, responsible for dialogue and on-screen sound effects. The L-MPS Satellite/Center units are versatile and can serve as satellite speakers for front, rear, or side channels in a multi-channel audio system. Each speaker incorporates a two-way design, featuring a dedicated low-frequency driver (woofer) and a high-frequency driver (tweeter) to ensure accurate reproduction of different parts of the audio spectrum. The inclusion of shielded drivers makes these speakers suitable for placement near CRT televisions or other sensitive electronic equipment without causing magnetic interference.

Important Technical Specifications:

Nominal Impedance: 8 ohms, indicating compatibility with a wide range of audio amplifiers.
Max Amp Power: 80 watts, suggesting that the speakers can handle a moderate amount of power from an amplifier without damage.
Frequency Response: 150Hz – 20kHz, providing a good range for vocal clarity and general audio reproduction, though a subwoofer would be recommended for deeper bass.
Sensitivity: 87 dB SPL (1 watt @ 1 meter), meaning the speakers produce 87 decibels of sound pressure level when driven by 1 watt of power at a distance of 1 meter. This indicates a moderate efficiency, requiring a reasonable amount of amplifier power to achieve high volumes.
Crossover Frequency: 5kHz, which is the point at which the audio signal is divided between the low-frequency and high-frequency drivers.
Enclosure Dimensions: 10-7/16" wide x 4-3/4" high x 3-3/4" deep (265mm wide x 119mm high x 94mm deep), highlighting their compact and space-saving design.
Shipping Weight (Theater Pac): 29 lbs. (13.2 kg), indicating the combined weight of the speakers in the Theater Pac configuration.

System Components:

Cabinet: The Minuette Center/L-MPS Center uses part number A010-7911 (Black), while the L-MPS Satellite uses J1162BA (Black). These cabinets house all the internal components.
Grille: The Minuette Center/L-MPS Center uses part number A025-7913 (Black), and the L-MPS Satellite uses J1163BB (Black). The grilles protect the drivers and contribute to the aesthetic appeal.
Front Baffle: The Minuette Center/L-MPS Center uses part number A028-7912 (Black), and the L-MPS Satellite uses J1161BA (Black). The baffle is the front panel to which the drivers are mounted.
Low Frequency Transducer (Woofer): Part number 902-7548, a 3-1/2" (80mm) paper cone woofer that is shielded. It has a DC resistance of 3.5 ohms +/- 10%.
High Frequency Transducer (Tweeter): Part number 902-7549, a 1/2" (12.7mm) pure titanium compression driver with an acoustic lens. It has a DC resistance of 3.5 ohms +/- 10% and uses aluminum wire.
Crossover Network: The Minuette Center/L-MPS Center uses part number A015-7547, and the L-MPS Satellite uses E4170B. The crossover network is crucial for directing the correct frequency ranges to the appropriate drivers.

Usage Features:

Versatile Placement: The compact size of these speakers allows for flexible placement in various room configurations, whether on shelves, stands, or mounted.
Shielded Drivers: The magnetic shielding of the drivers prevents interference with nearby electronic devices, particularly important for older CRT televisions.
Home Theater Integration: Designed to be easily integrated into multi-channel home theater systems, serving as center, front, or surround speakers.
Aural Sweep Tests: The manual specifies aural sweep tests for system, low-frequency, and high-frequency performance, indicating a design focus on sound quality and consistency. These tests involve playing specific frequency ranges at a given input voltage (6.3V) to verify the speaker's response.

Maintenance Features:

Component Exploded View: The manual provides a detailed exploded view of the speaker components, which is invaluable for identifying parts during repair or maintenance.
Wiring Diagrams: Comprehensive wiring diagrams for both the Minuette Center/L-MPS Center and the L-MPS Satellite are included. These diagrams show the connections between the input terminals, crossover network, and individual drivers, facilitating troubleshooting and repair.
Part Number Listing: A complete list of part numbers for cosmetic parts, crossover parts, and drivers is provided for both the Minuette Center (IF70013B) and Minuette Satellite (IF70012) models. This makes it easy to order replacement parts if needed.
- Minuette Center (Black) (IF70013B) Parts:
  - Cabinet (Black): A010-7911
  - Baffle: A028-7912
  - Grille Assy: A025-7913
  - Xover Assy: A015-7550
  - Terminal Cup: 542-7551
  - Tweeter 1/2" Polycarb: 902-7549
  - Woofer 3 1/2" Shlded (2 Ohm): 902-7548
- Minuette Satellite (IF70012) Parts:
  - Cabinet (Black Baffle): A010-7914
  - Cabinet (White Baffle): A010-7915
  - Grilles/Black: A025-7905
  - Grilles/White: A025-7906
  - Baffle (Black): A028-7907
  - Baffle (White): A028-7908
  - Woofer 3-1/2" Shielded: 902-7548
  - Tweeter 1/2 Polycarb: 902-7549
  - Complete Unit (Black): A003-7909
  - Complete Unit (White): A003-7910
Warranty Information: The manual refers to a separate Warranty Statement packed with each product, ensuring users have access to information regarding product support and repair policies.

The Minuette Center and L-MPS Satellite/Center speakers are designed for users seeking compact, versatile, and reliable audio solutions for their home entertainment systems, backed by detailed technical information and clear maintenance guidelines.