Name: Infinity 1211a
Brand: Infinity
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- CONTENTS -

SPECIFICATIONS ………………………………….……..1

FEATURES/TEST CONDITIONS……..…………………2

CONTROLS/CONNECTIONS………….……..…...…..…3

INSTALLATION………………….……...……..…...…...…5

BASIC TROUBLESHOOTING..…….…….………………7

TYPICAL SYSTEM WIRING..…….…….……………..…8

EXPLODED VIEW/PARTS LIST………………………....9

MECHANICAL PARTS LIST…………………………….10

AMPLIFIER BLOCK DIAGRAM…………………………11

P.C.B. DRAWINGS….…………………………………….12

ELECTRICAL PARTS LIST ……………………………. 16

REF 1211a ELECTRICAL PARTS LIST ADDENDUM…...…20

IC/TRANSISTOR PINOUTS..…………………………….21

REF 1210a SCHEMATICS………..…………..……..…..27

REF 1211a SCHEMATICS………..……………………..30

PACKING……………………….…………………………33

Reference 1210a/1211a Specifications

Output Power: 854W RMS x 1 @ 4 ohms; ≤1% THD + N

(14.4 VDC) 1300W RMS x 1 @ 2 ohms; ≤1% THD + N

Signal-to-noise ratio: 72dBA (reference 1W into 4 ohms)

Dynamic power: 1516W channels @ 2 ohms

Effective damping factor: 6.357 @ 4 ohms

Frequency response: 17Hz – 302Hz (-3dB)

Maximum input signal: 5.7V

Maximum sensitivity: Reference 1210a - 260mV

Reference 1211a - 75mV

DC Offset <50mV (-50%)

Output regulation: .132dB @ 4 ohms

Idle Current 2.8A

Input Impedance 22kΩ

Max Current Draw 70A @ 4 ohms

125A @ 2 ohms

Dimensions: 12 x 18 1/2 x 2 11/16” (L x W x D)

(305mm x 470mm x 68mm)

Fuse: 3 x 40A

Infinity continually strives to update and improve existing products, as well as create new ones. The specifications and details in

this and related JBL publications are therefore subject to change without notice.

Power Amplifier Reference 1210a/1211a

Infinity 1211a Service Manual

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