Parameter Specification Unit
QA Test
Limits
Conditions Notes
ATO Turn-on time 2 seconds functional
Amp connected and AC on, then
input signal applied
Auto Mute/ Turn-OFF Time 15 minutes 17
(T) Time before muting, after input
signal is removed
Auto turn of time (T) must be 10 > T < 17 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
Efficiency
Efficiency 70 % 65 Rated power Nominal Line voltage 120 VAC
Stand-by Input Power 12 Watts 15 @ nom. line voltage
Maximum allowable input power under nominal
Input voltage and frequency, in stand-by mode
(HOT or COLD operation).
Power Cons. @ rated power 340 Watts 375 @ nom. line voltage 230 Watts @ 6.0 Ohms nominal line voltage
Protection
Short Circuit Protection YES functional Direct short at output
Amplifier should resume operation after short
circuit condition removal
Thermal Protection YES functional @1/8 max unclipped Power
Temperature rise in accessible metal parts should
not exceed 35K rise for domestic version or 30K
rise for European versions (refer to requirements
sheet). Unit is protected for over-temperature
conditions
DC Offset Protection YES - DC present at Speaker Out leads Relay or crowbar (for driver/fire protection),
Line Fuse Rating
USA-Domestic 4 Amps Type-T or Slo Blo-250 V
EU 2 Amps Type-T or Slo Blo-250 V Internal fuse with UL/SEMKO rated holder
Alpha 1200s
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