Specifications
Wheatfield Audio Wheatfield Audio HA-4 Users Manual 
- 3 - 
Important Information 
 ! CAUTION: 
For protection against electric shock, do not open covers. No user-serviceable 
parts inside. Refer servicing to qualified personnel. Replace fuse only with same 
type and rating. 
Before connecting AC power, ensure that the voltage selector switch is set 
correctly for your local power. 
Power requirement: 
100-135 -or- 200-250 VAC, 50-60 Hz 
Fuse type:  
IEC 127/III 250V 0.20 A 
Buss GDC or S506 
Littlefuse 218 
Wickman 195 
Schurter FSF 










