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INFINITY PRIMUS PS28 150W 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 220-230 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 for Class AB
Type (Class AB, D, other) G G
n/a 230V Model
Rated Load Impedance 4 Ohms
n/a Nominal
Impedance used for electrical
measurements
System average impedance 8.79 Ohms
n/a Average impedance from 10 to 500Hz
Voice coil DCR 4.35 Ohms
n/a Reference
Rated Output Power 100 Watts
95 Single input driven
THD@ Rated Power 0.5 %
1 22K filter
THD @ 1 Watt 0.1 %
0.3 22K filter
DC Offset 10 mV-DC
50 @ Speaker Output
Damping factor >100
40
Measured at speaker terminals, Output
power 90 Watts
Dynamic power RMS 125 Watts
Reference
AVG Power over the first 4 consecutive
peaks, when tested with a burst siganl 3/20
at 50 Hz
Highest RMS value 152 Watts
Reference
Input Sensitivity
Input Frequency 50 Hz
50 Nominal Freq.
Line Input (L&R) 16.5 mVrms
±2dB To 1W Single input driven, AP Zo=600 Ohms
LFE Input 11.7 mVrms
±2dB To 1W LFE input driven only, AP Zo=600 Ohms
System Gain (Line input) 41 dB
±1dB G=118 Single input driven, AP Zo=600 Ohms
System gain (LFE input) 44 dB
±1dB G=165 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 85 dBr
80 rel. to rated power 22K filter
SNR @ 1W-unweighted 65 dBr
60 rel. to 1W Output 22K filter
Residual Noise Floor 1
mVrms(max)
1.5
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) Variable --
±2dB Crossover range 50-150 Hz
Subsonic filter (HPF) Hz
±2dB Fixed
Limiter (yes/no) YES --
Functional
THD at Max. Output Power <1 %
Functional
Features
Line Level inputs (L&R) YES
Functional Dual RCA conenctor (RED-WHT)
LFE Input YES
Functional Single input (Yellow color)
Phase Switch (yes/no) YES
Functional
Volume pot Taper (lin/log) LOG
Functional
Variable crossover YES
Functional
ATO YES
Functional
LED indicator YES
Functional Located at the amplifier panel
Input Configuration
Line In (L,R) L ,R --
Functional RCA inputs: L , R Summed to Mono
Line level in LFE LFE
Functional
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES --
Functional
ATO Level @ 50 Hz 1 mV
Functional One input driven
ATO Level @ 1 KHz 1 mV
Functional One input 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 Outputs AC Line cycled from OFF to ON
PS series PS28 subwoofer
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