MA258
20 + 20 watt
Audio Amplifier
With Headphone Amp
Connection guide
Salt Lake City, Utah
11/17
• Audiophile preamp - amplifier
• Built in Headphone Amplifier
• Low noise, efficient operation
• Small compact size
• Class D high efficiency amp
WARNING:
THE MINIMUM SPEAKER IMPEDANCE IS 4
OHMS.
IF YOU CONNECT AND USE THE MA258 WITH A LOWER
SPEAKER IMPEDANCE THAN 4 OHMS YOU WILL DAM-
AGE THE UNIT AND POSSIBLY OTHER EQUIPMENT
THAT IS CONNECTED TO THE MA258.
CH 4
CH 1
CH 2
CH 3
CH 4
LEVEL
LEVEL
LEVEL
LEVEL
PS12
CLASS AMP
5 + 5 WATT MIX/AMP
LEFT
RIGHT
MA251
3.5mm
STEREO
+
+
-
-
BOTH OUTPUTS MUST BE USED
PHANTOM
CH 1
INPUT
CH 2
INPUT
CH 3
INPUT
POWER
LINE
OUT
ON - OFF
CH 2
MONO
INPUT
MUTE
R
R
R
L
L
L
IN 1
VOLUME
BASS
20 + 20 WATT AUDIOPHILE AMP
MA258
MADE IN USA
0
10
www.rolls.com
HEADPHONE
PWR
SELECTOR
TREBLE
INPUT
CH2
PHONO
CH1
PS24
LEFT
RIGHT
+
+
-
-
SPEAKER OUTPUTS
+
-
MA258
PHONO
IN 2
ROLLS
-
+
-
+
SPECIFICATIONS:
Line Input Impedance:
10K Ohms
Power Output:
20 Watts X 2 (4 Ohms)
Voltage Gain:
30 dB Line
Maximum Supply Voltage:
24 VDC
THD:
.05% typical
EIN:
3 mV
Efficiency:
85%
Input Sensitivity:
28 mV
Bandwidth:
20Hz - 25 kHz +/- 3dB
+Size:
6.75" x 3.5" x 1.5"
Weight:
1.6 lb.
75889 02580
6
4
