Rolls RX321 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, 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 Electronic

Crossover

INPUT LEVEL LOW LEVEL LOW FREQ.

CLIP

-OO dB +20

INPUT LEVEL

RIGHT CHANNEL

LOW LEVEL LOW FREQ.

OO dB 0 -OO dB 0

500

200

150

MID LEVEL HIGH MID FREQ. HIGH LEVEL

100 5K

HIGH LEVEL

750

1K

2K
3K

4K

Hz

RX321

-OO dB 0

LOW LEVEL

HIGH FREQ.

500

200

150

100 5K

HIGH FREQ.

LEFT CHANNEL

500

200

150

100 5KHz

LOW FREQ.

750

1K

2K
3K

4K

Hz

HIGH LEVEL HIGH FREQ.

750

1K

2K
3K

4K

-OO dB 0

E

C

STEREO 2-WAY / MONO 3-WAY + SUB WOOFER

500

200

150

100 5K

LOW MID FREQ.

LECTRONIC

ROSSOVER

Hz

750

1K

2K
3K

4K

RX321

SUB WOOFER

IN

OUT

MONO
3 WAY

INPUT LEVEL

CLIP

-OO dB +20

OWNERS MANUAL

Rolls Corporation

Salt Lake City, UT

1/97

FRONT PANEL DESCRIPTION

ER

NOTE: Channel One descriptions are identical to Channel Two

INPUT LEVEL: Adjust the amount of input signal to the crossover
circuits.
LOW, HIGH LEVEL: Sets the output signal level of the indicated output
jack.
LOW,HIGH FREQUENCY: Adjusts the cut-off (3 dB down) frequency for
each crossover filter.
SUBWOOFER SWITCH: Sets the frequency at which the low filters
rolloff. Out is 20Hz, in is 80 Hz.

CLIP

-OO dB 0

LOW LEVEL

LEFT CHANNEL

500

200

150

100 5KHz

LOW FREQ.

INPUT LEVEL LOW LEVEL LOW FREQ.

-OO dB +20

INPUT LEVEL

HIGH LEVEL HIGH FREQ.

750

1K

2K
3K

4K

-OO dB 0

SUB WOOFER

750

500

200

1K

2K

150

3K

4K

100 5K

Hz

LOW MID FREQ. MID LEVEL HIGH MID FREQ. HIGH LEVEL

INPUT LEVEL

IN

OUT

-OO dB +20

MONO
3 WAY

RIGHT CHANNEL

LOW LEVEL LOW FR EQ.

CLIP

-OO dB 0 -OO dB 0

200

150

500

100 5K

750

1K

2K
3K

4K

Hz

HIGH LEVEL

200

150

HIGH FREQ.

500

Hz

100 5K

HIGH FREQ.

750

1K

2K
3K

4K

REAR PANEL DESCRIPTION

INPUT: 1/4" and XLR jacks for receiving the signal to be frequency
divided.
HIGH, LOW OUTPUTS: 1/4" and XLR jacks containing the high-fre­quency and low-frequency material to be sent to the power amplifiers.
SUBWOOFER OUT: 1/4" unbalanced jack containing the subwoofer
frequency signal.
INVERT/NORMAL switch: Reverses the phasing of the High Frequency
output by 180 degrees.
MONO/STEREO switch: Sets the mode of operation from Stereo 2-Way
to Mono 3-Way.

WARNING:

NRTL /C

50/60 Hz 15 VA
MADE IN U.S.A.

do not expose this device to rain or moisture.

CAUTION:

shock do not remove lid. No user
serviceable parts inside. Refer servicing
to qualified service personnel.

MODEL
RX321

120 VAC

Risk of electric shock or fire,

To reduce the risk of electric

SERIAL NUMBER

321-

RISQUE DE CHOC - NE PAS ENLEVER

HIGH

HIGH OUTPUT

NORM

INVERT

HIGH OUTPUT

RIGHT CHANNEL

LOW OUTPUT

MID OUTPUT

INPUT

WOOFER

SUB
OUT

STEREO 2-WAY MODE

HIGH
NORM

STEREO

INVERT

MONO

MONO 3-WAY MODE

HIGH OUTPUT

LEFT CHANNEL

LOW OUTPUT

LOW OUTPUT

INPUT

INPUT

MONO OPERATION

HIGH OUTPUT

HIGH OUTPUT

CONNECT TO POWER AMPLIFIER DRIVING
HIGH-FREQUENCY HORNS OR SPEAKERS

RIGHT CHANNEL
LOW OUTPUT

CONNECT TO POWER AMPLIFIER

DRIVING MID-FREQUENCY SPEAKERS

STEREO 2-WAY MODE

INPUT

WOOFER

HIGH

HIGH OUTPUT

NORM

STEREO

SUB

INVERT

MONO

OUT

MONO 3-WAY MODEMID OUTPUT

LEFT CHANNEL

LOW OUTPUT

LOW OUTPUT

SIGNAL TO BE DIVIDED (CROSSED OVER)

CONNECT TO POWER AMPLIFIER

DRIVING LOW-FREQUENCY SPEAKERS

INPUT

INPUT

FROM MIXER ETC.

For mono operation, set the Stereo/Mono switch on the rear panel IN,

ST

and see that the MONO LED on the front panel is lit. Set all level controls
to 0. Only the left channel input will be functional, and the labeling at the
bottom of the front panel should be used for setup. Connections should
be made using the reversed lettering on the rear panel as shown. After
proper connections are made and power is applied to the system, adjust
the Low, Mid and High Levels as needed.

STEREO OPERATION

HIGH OUTPUT

HIGH OUTPUT

CONNECT TO POWER AMPLIFIER DRIVING
HIGH-FREQUENCY HORNS OR SPEAKERS

SIGNAL TO BE DIVIDED (CROSSED OVER)

RIGHT CHANNEL
LOW OUTPUT

CONNECT TO POWER AMPLIFIER

DRIVING LOW-FREQUENCY SPEAKERS

FROM MIXER ETC.

INPUT

STEREO 2-WAY MODE

HIGH

NORM

STEREO

SUB

WOOFER

INVERT

MONO

OUT

MONO 3-WAY MODEMID OUTPUT

CONNECT TO POWER AMPLIFIER DRIVING
HIGH-FREQUENCY HORNS OR SPEAKERS

HIGH OUTPUT

DRIVING LOW-FREQUENCY SPEAKERS

CONNECT TO POWER AMPLIFIER

LEFT CHANNEL

LOW OUTPUT

LOW OUTPUT

SIGNAL TO BE DIVIDED (CROSSED OVER)

FROM MIXER ETC.

INPUT

INPUT

For stereo operation, ensure that the Stereo/Mono switch on the rear
panel is OUT, and the MONO LED on the front panel is not lit. Set all

INSTALLATION

The RX321 will mount in a standard 19" single rack space. It requires no
special ventilation but should be properly grounded and kept dry for
safety reasons. Use good quality input and output cableing. The RX321
has plenty of level to drive most any line or power amplifier. The 1/4"
outputs may be used TRS balanced or TS unbalanced.

level controls to 0. Connect an input signal to each of the right and left
inputs from your signal source (mixer, sound system etc.) as shown
above. Set the frequency controls to the desired crossover points ­consult speaker manufacturer's specifications for suggested crossover
frequencies. Connect cabling to the High and Low output jacks and to
their proper amplifier. Apply power to the entire system and adjust each
channel's High and Low Levels as needed.

2 3