JBL SUB333, Service Manual

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Parameter Spec. Unit Conditions Notes
THD @ 1 Watt 0.1 % 22k filter
Max. Output Power 80 Watts 2 ch. Stereo Mode @ 50Hz @1%THD
DC Offset 2 mV-DC @ Speaker Outputs
Damping factor >200 DF —
Input Sensitivity
Input Frequency 50 Hz Nominal Freq. 1 input driven
Line Input: Video/AUX 265 mVrms To Rated Power/ Vol @ Max 1 input driven
Signal to Noise
SNR-A-Weighted 100 dBA relative to 60w power/ 1k ohm term. A-Weighting filter
SNR-unweighted 75 dBr relative to 60w power/ 1k ohm term. 22k filter
SNR rel. 1W-unweighted 65 dBr relative to 1W Output/ 1k ohm term. 22k filter
Residual Noise Floor 1 mVrms Volume @max, using RMS reading
DMM/VOM (or A/P)
Input Impedance
Line Input: Video/AUX 20k ohms Nominal
Optical
Coax
Filters/EQ 0dBr = 1w @ 50Hz
HPF, LPF Fixed dBr 0dBr = 1w @ 50Hz
Signal Sens. (ATO)
Auto-Turn-On (yes/no) yes
ATO Input Frequency 1k Hz
ATO Level 2 mV 2mV@50Hz into Line Input w/ 1 ch. driven
ATO Bandwidth 5k Hz ATO-LPF for noise immunity
ATO Turn-on time 5 ms Amp connected and AC on, then input
signal applied
Auto Mute/ Turn-OFF 20 min. T before muting, after signal is removed
Power on Delay time
3 sec. AC Power Applied
Transients/Pops
Signal-Present Transient 5 mV-peak @ Speaker Outputs
Turn-on Transient 50 mV-peak @ Speaker Outputs AC cycled from
OFF to ON or ON to OFF
Efficiency
Stand-by Input Power 15 Watts @ nom. line voltage
Max Power Consumption 425 Watts @ nom. line voltage @ rated power
Efficiency 50 % Nominal... At rated output
Protection
Short Circuit Protection yes Direct short at output
Thermal Protection yes @1/8 max unclipped Power
DC Offset Protection yes DC present at Speaker Out leads
Line Fuse Rating 5 Amps Type-T or Slo Blo
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Dolby Pro-Logic Ò Surround Processor/Amplifier/Subwoofer SUB333