INFINITY RSIII-A
Service Manual

Technical Manual

Reference Standard Series 3-Way Speaker
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
Nominal Impedance: Power Rating: Crossover Frequencies: Frequency Response: 4 to 8 ohms 50 to 200 watts 600Hz, 4,000Hz 34Hz-32kHz +/-3dB

RS III-A/B
SPECIFICATIONS

PHYSICAL SPECIFICATIONS:
1x - EMIT Tweeter 1x - 2 1/2" (6.3cm) PolyDome Midrange 2x - 10" (50.8cm) Woofers Dimensions: 48"H x 18"W" x 7-3/4"D XXXXXXXXX XX 121.9x45.7x19.7cm Cabinet Not Sold Tweeter Control #145-0103 Midrange Control #145-0110 CB-1 Grille Crossover Logo POT 5� 5W POT 5� 15W #871-1974 #026-2212 NLA #716-1966-A #145-0103 #145-0110

PRODUCTION HISTORY
Introduced in 1984 Discontinued 1987 Original Retail Price: $1,500.00/system)

TECHNICAL INFORMATION

POLYDOME

TWEETER #902-5023 DIAPHRAGM #751-3722

2 1/2" MIDRANGE #902-5016 DIAPHRAGM #751-2417
7µF PP

10" WOOFER NLA Substitute #902-2279-A

5� 5W

1A-30

0.1mH IC

IN5343B

TWEETERS
IN5343B

0.6mH AC

5� 15W

INPUTS

16.5mH MM

1.0mH AC

5mF NPE

1A-30

MIDRANGE

4.5mH AC
600mF NPE

50mH IC

WOOFER (2)

REV A

9-98

INFINITY SYSTEMS INC., 250 Crossways Park Drive, Woodbury, New York 11797

The (2) woofers are wired in series. Red wire from the network connects to �+� terminal on one woofer. The purple "jumper wire" connects that same woofer's negative terminal to the �+� terminal on the 2nd woofer. Final connection is red/blk or black wire, from the network, which connects to the remaining negative terminal.

RS III_A/B Reference Standard Series 2-Way Speaker