JBL Cinemavision CVSUB50, Руководство по обслуживанию

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Cinema Vision Subwoofer
CVSUB50
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
Asia 100vac/50Hz Yes 90-110 100 Vrms Normal Operation
Parameter Specification Unit
QA Test
Limits Conditions Notes
Amp Section
Type (Class AB, D, other) D ---
Load Impedance (speaker) 4 Ohms Nominal Z-curve required
Rated Output Power 290 Watts Regulated 125 V line 5% tolerance applies
THD@ Rated Power 1 % 22k filter, 50Hz 290 W +/- 5 %
THD @ 1 Watt 0.2 % 22k filter, 50Hz
DC Offset N/A mV-DC < 20 @ Speaker Outputs
Damping factor 20 N/A > 15 measured at 50 Hz
Input Sensitivity
Line Input 350 mVrms 300 W @ 120Hz
Speaker/Hi Level Input N/A
Signal to Noise
SNR-A-Weighted 100 dBA relative to rated power A-Weighting filter
SNR-unweighted 70 dBr relative to rated power 22k filter
SNR rel. 1W-unweighted 60 dBr relative to 1W Output 22k filter
Residual Noise Floor 2 mVrms Volume @ max, using RMS reading DMM/VOM (or A/P)
Residual Noise Floor 1
mVrms(max)
Volume @ max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)
Input Impedance
Line Input 5 k ohms Nominal
Active Filters
Low Pass (fixed or variable)
FIXED --
Frequency 240 Hz
Slope 12 dB/Octave
Q Butterworth Damping
Subsonic filter (HPF)
FIXED --
Frequency 31 Hz
Slope 12 dB/Octave
Q 1.5 Damping
Friend Circuit
FIXED --
Frequency 62 Hz Hz notch filter
Slope 12 dB/Octave
Q 3 Damping
Switches
Main Power ON/OFF YES --
Type push-button -- Located on amp plate TV-8
Polarity Switch YES -- "DOWN": 0°; "UP": 180°
Type mini togle -- Located on amp plate
Limiter
(yes/no) YES compressor and limiter
THD at Max. Output Power less than 2 % Maximum Output Power Maximum THD as a result of limiting.
Output Volume Control
Volume Control Pot YES -- Located on amp plate
Taper (lin/log) log A taoer --
@ minimum setting no output
Input/Output Configuration
LFE In YES -- RCA phono jack, gold with purple insulator
Signal Sensing (ATO)
Auto-Turn-On (yes/no) YES --
ATO Input Test Frequency 100 Hz
ATO Input Threshold 2 mV typ.
ATO Low Pass cutoff 400 Hz 450 ATO-LPF for noise immunity
ATO Turn-on time 1 ms 10 Amp connected and AC on, then input signal applied ( 1 W output )
Auto Mute / Turn-OFF Time 10 minutes 5 < t < 15 Time before muting, after signal is removed
Power on Features
Power on Delay time greater than 2 sec. When AC Power is Applied
Power on LED YES -- bi-color LED located remotely on port facia
Normal On/Off green / red color ATO mode only ( no manual overide )
ATO -- color "Active": green; "Standby": red
Transients/Pops
ATO Transient 5 mV-peak @ Speaker Output
Turn-on Transient 30 mV-peak @ Speaker Output AC Line cycled from OFF to ON
Turn-off Transient 30 mV-peak @ Speaker Output AC Line cycled from ON to OFF
CVSUB50
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