Infinity PS212W, Service Manual

Parameter

Specification

Unit

QA Test 

Limits

Conditions

Notes

Transients/Pops

ATO Transient

0.5

V-peak

0.5V

@ Speaker Output

Amplifier activated by signal presence at the 
Line input

Turn-on Transient

0.5

V-peak

0.8V

@ Speaker Output

AC Line cycled from OFF to ON

Turn-off Transient

0.5

V-peak

0.8V

@ Speaker Output

AC Line cycled from ON to OFF

Efficiency

Efficiency

65

%

60

Test conducted at rated power 250W

Nominal Line voltage 

Efficiency at 1/8 of rated power

48

%

45

Test conducted at 31.25 WRMS

Nominal Line voltage-Rated impedance 4 Ohms

Standby Input power

10

Watts

12

Nominal Line voltage  RED LED

Idle input power

14

Watts

20

@ nom. line voltage

Maximum allowable  input power under nominal  
Input voltage and frequency, HOT or COLD 
operation. LED GREEN no signal applied

Power Cons. @ rated power

388

Watts

416

@ nom. line voltage

250 Watts @ 4 Ohms nominal line voltage

Protections

Short Circuit Protection 

YES

functional 

Direct short at output

Amplifier should resume operation after short 
circuit condition removal 

Thermal Protection 

YES

functional

@1/8 max unclipped Power at 1.06 
times the input voltage

Temperature rise in accessible metal parts 
should not exceed 35K rise for domestic version 
or 30K rise for European versions (refer to 
requirements sheet).

DC Offset Protection

YES

-

DC present at Speaker Out leads

Design must insure no Offset/DC Voltage at the 
speaker output  under any operating condition 
including abnormal operation

Line Fuse Rating
USA-Domestic 

3.15

Amps

3.15

Type-T or Slo Blo-250 V

Internal fuse with UL/SEMKO rated holder

EU

2

Amps

2

Type-T or Slo Blo-250 V, Low Breaking 
capacity

Internal fuse with UL/SEMKO rated holder

SYSTEM PERFORMANCE USING WIRELESS Tx 

THD @ 1 Watt

0.2

%

0.3

22K filter

Tx Input Impedance

Line Input (LFE)

7.3K

ohms

n/a

Nominal @ 1KHz

System Sensitivity

Using Tx

Input Frequency

50

Hz

50

Nominal Freq.

System level, using Tx

LFE Input

6.187

mVrms

±1dB

To 1 Watt

System level, using Tx

System gain

50

dB

±1dB

To 1 Watt

System level, using Tx

System Signal to Noise

Using Tx

SNR-A-Weighted

65

dBA

65

relative to 1W

A-Weighting filter

SNR-unweighted

55

dBr

55

relative to 1W

22K filter

Filters

System filter

None

Hz

Should not have any effect on the FR of 
the system

Tx Limiter 

THD at Max. Output Power

5.7

Vrms

functional 

Max input voltage Tx front end can handle 
without exceeding 1% THD

Tx-Signal Sensing (ATO)

Auto-Turn-On (yes/no)

YES

functional 

ATO Input test frequency

50

Hz

functional 

ATO Level LFE Input

2

mV

functional 

Auto Mute/ Turn-OFF Time

5-15

minutes

5-15

T before muting, after signal is removed

Auto turn of time (T)   must be  5 > T < 15 
Minutes

Tx Features

--

LFE Input

YES

--

functional 

Single RCA Connector

Channel ID switch

YES

functional 

4 Position switch, to select wireless channels

External power supply 
requirements

18

VDC

functional 

System provided with Power supply model GPE-
152, delivering 18VDC @ 400mA

Power comsumption

Tx Standby Input Power

1

Watts

Reference

120VAC line voltage

RED LED

Tx Standby input current

0.019

Amperes

Reference

120VAC line voltage

RED LED

Tx Idle Power

2.34

Watts

Reference

120VAC line voltage

Unit in operation  Locked to Rx section Solid 
GRN

Tx Idle Power

1.64

Watts

Reference

120VAC line voltage

Unit in operation NOT locked to Rx section

Other Parameters/Notes:

1. Volume control should be 

at the input buffer stage

 in order to lessen the possibility of clipping the input section with highly dynamic audio material.

2. ALL SPECS SHOULD BE MEASURED AT NOMINAL LINE VOLTAGE. 

PS212W 

subwoofer 

3