Rolls RA170 owner manual Introduction, Description, Specifications, Schematic

INTRODUCTION

Thank you for your purchase of the ROLLS 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 transformer 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 power status.

CLIP: These LEDs light in the event of RA170 circuit overload.

REAR PANEL

		SERIAL NUMBER		SPARE
120 VAC	MODEL RA170		7 0 V O U T P U T
50/60 Hz 15 VA		170-

	CAUTION
	RISK OF ELECTRIC SHOCK	WARNING: DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.
MADE IN U.S.A.	DO NOT OPEN	TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT NOT REMOVE BACK.
		NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL RISQUE DE CHOC - NE PAS ENLEVER	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 connec- tions. No special transformers are required.

SPARE: 1/4” and RCA jacks. These are not connected.

MAIN INPUTS: 1/4” and RCA jacks to be connected to line level signal to be

amplified. Note: Do not use both jacks simultaneously as both jacks are tied directly together.

BURN WARNING!

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.

INSTALLATION

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.

SPECIFICATIONS
Recommended Load:	70 Volt line (70 Watts maximum)
Frequency Response:	70Hz to 20 kHz
Equiv. Input Noise:	100 μV typical, A weighted
	600 Ω input
S/N Ratio:	114 dB @ 70 Watts
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

R C A

P C

C 3

J 1 A

1 U R A 2 3 5

. 1 U F R A 1 7 0

P 1

V+

R 1

R 2

1

P 1 0 0 K

1 0 K

1 K

P H O N E 1 / 4

3

U 1

C H A N N E L

1

J 2

4

L M 3 8 7 5

C 4 V-

7

2 2 0 P F

8

I N S E R I E S W / O U T P U T S R A 1 7 0 O N L Y

C 5

C4 7 0C4U 7 0 U

R 5

L 1

1 0 K

R E D 1

C L I P

0 . 7 u2H7 P F

H D R 2

D 2

R 3

A

1

R 6 L D R R

R A 1 7 0 4O 7NKLRY 4

B L K

A

1 K

R

1 K

C4 7 0 UC4 7 0 U

H D R 2

4 7 K

C 6

C 7

4 7 U

R A 2 3 5

R C A

P C

1 U

O N L Y

J 1 B

P 2

V+

C H A N N E L

2

P 1 0 0 K

R 7

R 8

1

1 0 K

1 K

P H O N E

3

1 / 4

U 2

J 3

4

V-

L M 3 8 7 5

2 2 0 P F

7

C 8

8

C 9

R 1 1

L 2

1 0 K

0 . 7 u2H7 P F

C L I P

R E D 1A

R 1 0

R 9

D 3

4 7 K

1 K

1H D R 2

R 1 2L D R R

1 K

B L K H D R 2

C 1 0

A

4 7 U

R A 2 3 5

O N L Y

S W 1

V+

R 1 3

T 1

2 - 0 0 - 4 8 8 04

3

C P 8 0 1 0

C 2

S W S P S T

2 2 K

A C

C 1 14 7 0 0 U F

5 0 3

2

2

B R 1 1

D 1

C 1

L D R R

R O L L S C O R P O R A

A C P L U G

C 1 3

4 7 0 0 U F

5 1 4 3 S o u t h M a i

1

5 0 3

S a lt L a k e C it y ,

3

C 1 2

T it le : R A 1 7 0 / R A 2

V-

5 0 3

Document Number:

R e v

S iz e :

R A 2 3 5 . SBC H

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Date: 11-May-1999

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