Rolls RA170 User manual

RA170 70 Volt-70 Watt Amplifier
The R A170 is a great problem solver for installation applications. It's a mono
70 Volt amplifier requiring no transformer coupling to drive 70 volt speakers
directly. The unit is a single rack-space, mono unit with a choice of an RCA or
1/4 unbalanced input. The 70 volt speaker outputs are provided via spring-
loaded terminals - no transformer is required for speaker connection.
The front panel includes a Power indicator LED, a Volume control, and two
Clip LEDs which indicate circuitry overload. The output circuitry has been pro-
tected from momentary shorting and excessive load by a specially designed pro-
tective circuit.
FEATURES:
 Balanced 70 volt line output
 Drives 70 volt speakers directly
 RCA or 1/4" inputs
 Spring-loaded output
 Clip indication
 Fault protected output
SPECIFICATIONS
RecommendedLoad: 70Volt line (70Watts maximum)
Frequency Response: 70Hz to 20 kHz
Equiv. Input Noise: 100 µV typical, A weighted
600 Ωinput
S/N Ratio: 114 dB @ 70Watts
Gain: 40 dB
InputImpedance: 47 k Ω
Size (W x H x D): 19" x 1.75" x 5" (48 x 4.5 x 12.7)
Weight: 5.5 lbs (2.5 kg)
ROLLS Coporation
5143 South Main Street, Salt Lake City, UT, 84107
[phone] FAX [phone]
[email protected] • www.rolls.com
6/99
VOLUME
RA 170
PWR CLIP CLIP
70 V olt P o w e r A m p lifie r
120 VAC
50/60 Hz 15 VA
MADE IN U.S.A.
70V OUTPUT
CAUTION
RISQUE DE CHOC - NE PAS ENLEVER
RISK OF ELECTRIC SHOCK
DO NOT OPEN
MODEL RA170
SERIAL NUMBER
170-
WARNING:
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT NOT REMOVE BACK. NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
SPARE
MAIN INPUTS