Infinity TSS-Sub500, Service Manual

TSS-Sub500

100W Powered Sub/ Plate Amp 

LINE VOLTAGE

Yes/No

Hi/Lo Line

Unit

Notes

US 120VAC/60Hz

Yes

108-132

Vrms

Normal Operation

Europe 220-240VAC, 50-60Hz

Yes

220-240

Vrms

Normal Operation

Parameter

Specification

Unit

QA Test Limits

Conditions

Notes

Amp Section

Type (Class AB, D, other)

AB  

AB

n/a

120V Model

External Sink required 

Type (Class AB, D, other)

G

G

n/a

230V Model

External Sink required

Load Impedance (speaker)

4

Ohms

n/a

Nominal

Rated Output Power

100

Watts

95

Single input driven

THD@ Rated Power

0.5

%

1

22K filter

THD @ 1 Watt

0.1

%

0.5

22K filter

DC Offset

10

mV-DC

50

@ Speaker Output

Damping factor

>100

DF

100

50Hz, 4 Ohms load

Measured at amplifier board speaker output 
terminals, Output power 90 Watts

Input Sensitivity

Input Frequency

50

Hz

50

Nominal Freq.

Line Input (L&R)

13.8

mVrms

±2dB

To 1 Watt

Single  input driven, AP Zo=600 Ohms

LFE Input

8.62

mVrms

±2dB

To 1 Watt

LFE input driven only, AP Zo=600 Ohms

Signal to Noise

SNR-A-Weighted

100

dBA

85

rel. to rated power

A-Weighting filter

SNR-unweighted

80

dBr

80

rel. to rated power

22K filter

SNR @ 1W-unweighted

60

dBr

60

rel. to 1W Output

22K filter

Residual Noise Floor

1

mVrms

2

Volume @max, using RMS reading 
DMM/VOM (or A/P)

Residual Noise Floor

1

mVrms(max)

2

Volume @max, w/ A/P Swept Bandpass 
Measurement (Line freq.+ harmonics)

Input Impedance

Line input L&R , LFE

>10

K ohms

n/a

Nominal

Filters

Low Pass (fixed or variable)

4th order fix

--

±2dB

Subsonic filter (HPF)

2nd order

Hz

±2dB

Limiter

 (yes/no)

YES

--

Functional

THD at Max. Output Power

1

%

Functional

Features

LFE Input

YES

Functional 

Volume pot Taper (lin/log)

LOG

--

Functional 

ATO

YES

Functional 

Input Configuration

Line In (L,R)

L ,R

--

Functional RCA 

inputs

Line level in LFE

LFE

Functional 

Signal Sensing (ATO)

Auto-Turn-On (yes/no)

YES

--

Functional 

ATO Input Frequency

50

Hz

Functional 

ATO Level

2

mV

Functional 

2mV@50Hz into Line Input w/ 1 ch. 
driven

ATO Turn-on time

5

ms

Functional 

Amp connected and AC on, then input 
signal applied

Auto Mute/ Turn-OFF Time

10

minutes

Functional 

T before muting, after signal is removed

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

Power on Delay time

3

sec.

Functional 

AC Power Applied

Transients/Pops

ATO Transient

5

mV-peak

10

Speaker Outputs

Turn-on Transient

50

mV-peak

100

Speaker Output

AC Line cycled from OFF to ON

Turn-off Transient

50

mV-peak

100

Speaker Output

AC Line cycled from ON to OFF

Efficiency

Stand-by Input Power

12

Watts

15

@ nom. line voltage

Maximum allowable  input power under 
nominal  Input voltage and frequency, HOT 
or COLD operation.

Power Cons.@rated power

195

Watts

210

@ nom. line voltage

100 Watts @ 4 Ohms nominal line voltage

3

TSS-Sub500