HR251 50 + 50 watt
Connection guide
Rolls Corporation
Salt Lake City, UT
9-21
Made in USA ww.rolls.com
What's in the box?
1 - Made in USA HR251
1 - 24V power supply PN KSU100
1 - This owners manual
Made in USA ww.rolls.com
To operate the HR251, properly connect
cables from a source to the RCA or XLR
channel inputs of the HR251. Connect
the HR251 outputs to speakers 4 Ohms
or higher impedance. Adjust the channel
level controls for the desired volume.
NOTE: THIS MANUAL ASSUMES THE
USER HAS A WORKING KNOWLEDGE
OF AUDIO ELECTRONICS, BALANCED
AND UNBALANCED CONNECTIONS,
AND PROPER SIGNAL LEVEL SET-
TING.
The HR251 is a dual channel, 50 watt,
power amplifier designed for audio and
visual professional applications. An
FR4(V94-0) rated glass epoxy circuit
board and powder coated steel chassis,
make the HR251 a product that will last.
Inputs are stereo RCA and XLR at line
level. The HR251 has Plugable Phoenix
connectors for outputs.
CONNECTION:
DESCRIPTION:
Power Amplifier
SPECIFICATIONS:
Input Impedance:
10K Ohms RCA
10K Ohms XLR
Power Output:
50 Watts X 2 (4 Ohms)
Voltage Gain:
30 dB
Maximum Supply Voltage:
24 VDC
THD:
.05% typical
EIN:
3 mV
Efficiency:
87%
Input Sensitivity:
28 mV
Bandwidth:
20Hz - 25 kHz +/- 3dB
Size:
6.5" x 4" x 1.5"
