Infinity ENTRA SUB TWO - CONTROLS AND CONNECTIONS; Rear Panel

INFINITY ENTRA SUB TWO 150W Powered Sub/ Plate Amp
LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes
US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation
EU 230vac/50-60Hz Yes 207-264 230 Vrms Normal operation, MOMS required
Parameter Specification Unit
QA Test
Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D n/a n/a
Load Impedance (speaker) 4 Ohms n/a Nominal
Rated Output Power
(
120VA
C
150 Watts 135 Domestic version only 120 VAC-60 Hz
Rated Output Power
(
230VA
C
150 Watts 130 EU Version only 230 VAC-50 Hz
THD @ Rated Power 0.3 % 1 22K filter 140 Watts
THD @ 1 Watt 0.1 % 0.5 22K filter
DC Offset 10 mV-DC 30 Amplifier output
Damping factor >50 DF 35 Measured at amplifier board
Measured at the speaker cable. 150 Watts @
THD < 0.1 % @ 50 Hz
Input Sensitivity
Input Frequency 50 Hz 50 Nominal Freq.
L&R 32 mVrms ±2dB To 1 Watt Single input driven, AP Zo=600 Unbalance
LFE input 38 mVrms ±2dB To 1 Watt
Single input driven, LFE switch ON, AP Zo=600
Ohms, Unbalance.
Speaker/Hi Level Input 325 mVrms ±2dB To 1 Watt Single input driven, EQ switch in Normal
L&R Sensitivit
y
in dB to 1 Wat
t
36 dB ±2dB To 1 Watt Single input driven, AP Zo=600 Unbalance
Signal to Noise
SNR-A-Weighted 90 dBA 80 relative to rated power A-Weighting filter
SNR-unweighted 90 dBr 80 relative to rated power 22k filter
SNR rel. 1W-unweighted 65 dBr 60 relative to 1W Output 22k filter
Residual Noise Floor 0.5 mVrms 1
Volume @max, using RMS reading
DMM/VOM (or A/P) BW=20 KHz.
Line level inputs must be terminated using
1KOHM
Residual Noise Floor 0.5 mVrms
(
max
)
1
Volume @max, w/ A/P Swept
Bandpass Measurement (Line
freq.+ harmonics) (BW=20 Khz)
Line level inputs must be terminated using
1KOHM
Input Impedance
Line Input (L, R,LFE) Minimum 10K ohms n/a Nominal
Speaker/Hi Level Input Minimum 4.7K ohms n/a Nominal
Filters
LP filter 4th 50-150 Hz ± 10
See AP curves 2nd order variable + 2nd order
fix-24 db/Octave
Subsonic filter
(
HPF
)
3rd Ord
e
Fixed
LFE Low pass 2nd order 200>LP<1K Hz LFE input driven only
HP speaker out connector 200 Hz ± 10 Speaker input driven - 4 Ohms
100 Hz ± 10 Speaker input driven - 8 Ohms
Limiter
THD at Max. Output Power <5 <10 functional Maximum Output Power
Maximum THD as a result of limiting., Input
signal 6dB above its maximum sensitivity
(Single input driven)
Features --
Volume pot Taper (lin/log) LOG -- functional A Taper
HP Speaker out YES functional Refer to Filter section
Phase switch 0-180 deg functional
LP Filter defeat switch YES functional Disables LP filter, intended for LFE
Input Configuration
Line In (L,R) & LFE
YES -- functional Dual RCA jack
Spkr/Hi Level In YES -- functional Binding post connector L&R
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES functional
ATO Input test frequency 50 Hz functional "
ATO Level LFE Input 2 mV functional " Maximum acceptable level.
ATO Level Speaker in 50 mV functional " Maximum acceptable level.
ATO Turn-on time 5 ms functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 15 minutes 20
(T) Time before muting, after input
signal is removed
Auto turn of time (T) must be 5 > T < 20
Minutes
Power on Delay time 3 sec. 4 AC Power Applied
Transients/Pops
ATO Transient 5 mV-peak n/a @ Speaker Outputs
Turn-on Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from OFF to ON
Turn-off Transient 50 mV-peak 2v-pp @ Speaker Outputs AC Line cycled from ON to OFF
Entra Sub Two