Rolls RA170 User Manual
LIMITED WARRANTY
This product is warranted to the original consumer purchaser to be free from
defects in materials and workmanship under normal installation, use and service for a
period of one (1) year from the date of purchase as shown on the purchaser’s receipt.
The obligation of Rolls Corporation under this warranty shall be limited to repair
or replacement (at our option), during the warranty period of any part which proves
defective in material or workmanship under normal installation, use and service, provided
the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products returned to us or to an authorized Service Center must be accompanied by
a copy of the purchase receipt. In the absence of such purchase receipt, the warranty
period shall be one (1) year from the date of manufacture.
This warranty shall be invalid if the product is damaged as a result of defacement, misuse, abuse, neglect, accident, destruction or alteration of the serial number,
improper electrical voltages or currents, repair, alteration or maintenance by any person or
party other than our own service facility or an authorized Service Center, or any use
violative of instructions furnished by us.
This one-year warranty is in lieu of all expressed warranties, obligations or
liabilities. ANY IMPLIED WARRANTIES, OBLIGA TIONS, OR LIABILITIES,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANT ABILITY AND FITNESS FOR A PAR TICULAR PURPOSE, SHALL BE
LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN
LIMITED WARRANTY. Some states do not allow limitations on how long an implied
warranty lasts, so the above limitation may not apply to you.
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL
OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER
WARRANTY, EXPRESSED OR IMPLIED, WHA TSOEVER. Some states do not allow
the exclusion or limitation of special, incidental or consequential damages so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from state to state.
RA170
70 VOLT / 70 WATT
AMPLIFIER
VOLUME
PWR
PO WER
CLIP
CLIP
ROLLS CORPORATION
SALT LAKE CITY, UTAH
6/99
OWNERS MANUAL
INTRODUCTION
INSTALLATION
Thank you for your purchase of the R OLLS RA170 70 Volt / 70 Watt Power
Amplifier. The RA170 is a virtually indestructible single rack space amplifier
intended for the contractor and install market. It requires no tr ansf ormer coupling
to drive 70 volt speakers directly. The mono unit features both RCA and 1/4”
inputs. The 70 volt speaker outputs are provided via spring-loaded terminals.
DESCRIPTION
FRONT PANEL
VOLUME
PWR
CLIP
CLIP
VOLUME: This control adjusts the output level of the RA170.
PWR: LED indicating the unit’ s po wer status.
CLIP: These LEDs light in the e v ent of RA170 circuit o verload.
REAR P ANEL
120 VAC
50/60 Hz 15 VA
MADE IN U.S.A.
MODEL RA170
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
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
70V OUTPUT
RISQUE DE CHOC - NE PAS ENLEVER
SPARE
MAIN INPUTS
120 VAC 50/60 HZ 15 VA: Power Cord. Connect to a properly grounded AC
source.
70V Output: Spring loaded terminals to be connected to 70 Volt speaker connections. No special transf ormers are required.
SPARE: 1/4” and RCA jacks . These are not connected.
MAIN INPUTS: 1/4” and RCA jac ks to be connected to line le v el signal to be
amplified. Note: Do not use both jacks simultaneously as both jacks are tied
directly together.
BURN W ARNING!
THE FRONT PANEL OF THE RA170 IS THE HEAT DISTRIBUTION FOR THE
OUTPUT STAGE. IF THE UNIT IS OPERATED AT HIGH VOLUMES, IT MAY
GET HOT.
Mount the RA170 in a safe and sturdy rack. Connect the output of the signal
source to the selected input of the RA170. Connect the 70V Output terminals to
the 70 volt speakers .
Plug the AC cord into a properly grounded AC outlet.
Send signal to the RA170 and adjust the VOLUME control for a comfortable
listening level.
SPECIFICA TIONS
Recommended Load: 70 Volt line (70 W atts maximum)
Frequency Response: 70Hz to 20 kHz
Equiv . Input Noise: 100 µV typical, A weighted
600 Ω input
S/N Ratio: 114 dB @ 70 W atts
Gain: 40 dB
Input Impedance: 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)
SCHEMATIC
D2
LDRR
CLIP
D3
LDRR
CP 8010
2
C3
1U R A235 .1UF R A170
R1
10K
RA 170 O NLY
C7
1U
R7
10K
4
1
BR1
C13
503
3
L1
0.7uH
L2
0.7uH
C11
503
R2
1K
R
47K
220PF
R8
1K
V+
V-
C4
220PF
C5
27PF
R3
47K
C9
27PF
R10
47K
RA 235 O NLY
C2
4700UF
C1
4700UF
V+
1
1
U1
3
3
4
4
LM 3875
V-
7
7
8
8
R4
1K
C6
47U
V+
1
1
3
3
U2
4
4
LM 3875
V-
C8
7
7
8
8
R9
1K
C10
47U
R13
22K
D1
LDRR
C12
503
ROLLS CORPORATION
5143 South M ain S treet
Salt Lake C ity, UT 84107
Title: R A170 / R A235 P OW ER AM P LIFIE RS
Document Number:
Size:
Ba
Date: Sheet of
11-May-1999
RCA PC
J1A
PHON E 1/4
CHANNEL 1
J2
IN SERIES W /O UTPUTS RA170 ON LY
470U
C
470U
C
470U
470U
C
C
RCA PC
RA 235 O NLY
J1B
CHANNEL 2
PHON E 1/4
J3
AC
AC PLUG
1 3
RED
BLK
RED
BLK
SW 1
SW SPST
2
1
1
1
1
A
HDR2
HDR2
HDR2
HDR2
A
P1
P100K
R5
10K
CLIP
A
R6
A
1K
P2
P100K
R11
10K
R12
1K
T1
2-00-4880
Rev
BRA 235.S CH
1
1
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