Rolls RA235 User Manual

SPECIFICATIONS

Recommended Load: 8 Ω
Frequency Response: 5 Hz - 40 kHz
Equiv. Input Noise: 100 µV typical, A weighted

600 Ω input
S/N Ratio: 114 dB @ 35 Watts
Gain: 34 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)

RA235

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, OBLIGATIONS, OR LIABILITIES,
INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MER­CHANTABILITY AND FITNESS FOR A PARTICULAR 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, WHATSOEVER. 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.

STEREO 35 WATT

POWER AMPLIFIER

VOLUME 1

PWR

CLIP

RA 235

VOLUME 2

CLIP

Rolls Corporation

Salt Lake City, UT

4/99

Owners Manual

INTRODUCTION

Thank you for your purchase of the ROLLS RA235 Stereo 35 Watt Power
Amplifier. The RA235 is a virtually indestructible single r a ck space ampli­fier intended for musicians and studio owners alike. The unit is ideal for
home studio applications or wherever a clean, efficient, medium wattage
amp is required. Please read the following manual carefully to achieve the
best results from this product.

INSPECTION

1. Unpack and Inspect the RA235 package
Your RA235 w as carefully packed at the factory in a protective carton.
Nonetheless, be sure to examine the unit and the carton for any signs of
damage that may have occurred during shipping. If ob vious physical
damage is noticed, contact the carrier immediately to make a damage
claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.

2. Please complete the Warranty Registration Card and return it to the
factory.

your signal source to the input(s) of the RA235, and connect the outputs
to your speakers. Observe the polarities as indicated in the Rear P anel
descriptions and the diagram below.
THIS DIAGRAM IS A CONNECTION EXAMPLE ONLY. DO NOT USE
BOTH THE RCA AND 1/4" INPUTS AT THE SAME TIME.
Plug the RA235 pow er cord in to a properly grounded AC power source
and press the Pow er switch up, so the red part of the s witch is showing, to
apply power to the unit.

BURN W ARNING! - THE FRONT P ANEL OF THE RA235 IS
THE HEAT DISTRIBUTION FOR THE OUTPUT STAGE, IT
WILL VARY BETWEEN 180 TO 200 DEGREES FAHREN­HEIT.

S T E R E O
M I X E R

H I F I T U N E R

DESCRIPTION

FRONT PANEL

VOLUME 1

VOLUME 2

PWR

CLIP

CLIP

RA235

PWR: This LED indicates that the RA235 is receiving power .
V OLUME 1/VOLUME 2: Adjusts the output level of that channel.
CLIP: This LED indicates the channel circuitry is overloading.

REAR PANEL

120 VAC

50/60 Hz 15 VA

MADE IN U.S.A.

MODEL RA235

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

SERIAL NUMBER

235-

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

CHANNEL TWO

OUTPUTS

CHANNEL ONE

CHANNEL 2 INPUT

RISQUE DE CHOC - NE PAS ENLEVER

CHANNEL 1 INPUT

CHANNEL INPUTS: 1/4" and RCA connectors. Connect the RCA jacks to
the output of a line level device such as a tuner, cassette player, or CD
player.

Note: Do not directly connect the output of a phono player as those

devices require special equalization.

Connect the unbalanced 1/4" jacks to the output of a mixer or preamplifier.
For MONO operation, plug one mono RCA connector between the two

RCA jacks. Either Channel One or Channel Two 1/4" inputs may be used
as the mono input.

INSTALLATION
Mount your RA235 into a safe and sturdy rack. Connect the outputs of

120 VAC

50/60 Hz 15 VA

MADE IN U.S.A.

CAUTION

RISK OF ELECTRIC SHOCK

SCHEMATIC

CHANNEL 1

CHANNEL 2

1 3

DO NOT OPEN

RCA PC
J1A

PHONE 1/4
J2

RCA PC
J1B

PHONE 1/4
J3

AC?

AC PLUG

MODEL RA235

RED

BLK

RED

BLK

SW1

SW SP ST

2

SERIAL NUMBER

235-

WARNING:

TO REDUCE THE RISK OF ELECTRIC SHOCK DO NOT NOT REMOVE BACK.
NO USER SERVICABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL

P1

P100K

1

HDR2

A

1

A

HDR2

P2

P100K

A

1

HDR2

1

HDR2

A

T1

2-00-4880

CHANNEL TWO

DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

R5
10K

CLIP

D2
LDRRR6

1K

R11
10K

CLIP

D3

R12

LDRR

1K

CP8010

2

BR1

OUTPUTS

CHANNEL ONE

C3
1U

R1
10K

C7
1U

R7
10K

4

1

C13
503

3

V+

R2
1K

V-

C4

220PF

C5

L1

27PF

0.7uH

R3
47K

V+

R8
1K

V-

220PF

C8

C9

L2

27PF

0.7uH

R10

47K

V+

R13

C2

22K

4700UF

C11
503

C1
4700UF

C12
503

V-

CHANNEL 2 INPUT

RISQUE DE CHOC - NE PAS ENLEVER

1

U1
3
4

7
8

LM3875

R4
1K

C6
47U

U21

3
4

7
8

LM3875

R9
1K

C10
47U

D1

LDRR

CHANNEL 1 INPUT

ROLLS CORPORATION

5143 South Main Street

Salt Lake City, Utah84107

Title

POWER AMPLIFIER RA235

Size: Document Number:

RA235.SCH

Ba

25-Mar-1999

Date:

Sheet of

Rev:

0

0