Pub. 42004-340E
Model PA250-001 250 Watt Central Amplifier
Page: 5 of 12
f:\standard ioms - current release\42004 instr. manuals\42004-340e.doc
06/02
Block Diagram
The block diagram for the Model PA250-001 Amplifier is shown below:
Speakers
For Direct 8-ohm Operation:
Use speakers of proper voice coil impedance and power handling capability.
For 25 V/70 V Line Operation:
When using the amplifier’s 25 V or 70 V line operation, the tap setting on the proper V-matched line-
matching transformer determines the individual speaker’s power level. Use of these transformers allows
the speakers to be placed at longer distances from the amplifier without significant power loss. The
number of speakers for a line-driven central amplifier system is limited to the power available from the
amplifier.
Note:
The sum of all of the connected speakers’ power settings
MUST NOT
exceed the total power
available from the amplifier.
Example: This 250-watt central amplifier can drive approximately 33 speakers with drivers tapped at 7.5
watts each.
Figure 5. Model PA250-001 Block Diagram