Centralized audio applications 
EST3 Installation and Service Manual  4.9 
Table 4-3: 1B3–250 Amplifier specifications 
Output voltage  25 or 70 Vrms 
Primary power  120 Vac, 60 Hz 
Battery power  24 Vdc 
AC power consumption 
 standby 
 full load 
 
48 W 
700 W 
DC power consumption 
 standby 
 full load 
 
0 W (when using the ATP) 
20 A 
Dimensions (HWD)  8.5 x 19 x 15 in 
(21.6 x 48.3 x 38.1 cm) 
Weight  55 lb (24.9 kg)