Rockford Fosgate Symmetry XOM Owner's/Operator's Manual

Brand: Rockford Fosgate

Model: Symmetry XOM

Category: Musical Equipment

Type: Owner's/Operator's Manual

This manual is also suitable for

METRY

CROSSOVER

[XOM]

OWNER’S/OPERATOR’S

MANUAL

Dear Customer,

Congratulations! We appreciate your purchase

of the

Electronic Crossover

Module for your SYMMETRY system. As you get acquainted with the

XOM, you will find that it is not only easy to use, but also offers endless

possibilities for audio enjoyment.

For maximum performance we recommend you have your new Rockford

Fosgate product installed by an Authorized SYMMETRY Dealer, as we

provide specialized training through Rockford Technical Training Insti-

tute

(RTTI).

Please read your warranty and retain your receipt and

original carton for possible

future

use.

You will see additional SYMMETRY products introduced at regular

intervals for years to come, and your Authorized SYMMETRY Dealer can

quickly install these new optional modules at your convenience.

With

proper care and installation, SYMMETRY will provide you years of

listening enjoyment.

To add the finishing touch to your new

Rockford

Fosgate image, order your

Rockford

accessories, which includes everything from

T-shirts and jackets,

to hats and sunglasses.

To get a free brochure on Rockford Fosgate products and Rockford

accessories, please call 602-967-3565 or FAX 602-967-8132.

PRACTICE SAFE

SOUND™

CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER

1OOdB

MAY CAUSE PERMANENT HEARING LOSS. HIGH POW-

ERED AUTOSOUND SYSTEMS MAY PRODUCE SOUND PRESSURE

LEVELS WELL OVER 130dB. USE COMMON SENSE AND PRACTICE

SAFE SOUND.

Table Of Contents

Specifications

........................................................................ Page

Introduction

.......................................................................... Page

Remote Data Access Terminal ..............................................

Page

The XOVER

Menu..

............................................................... Page

Selecting the

Crossover Frequencies ..............................

Page

Adjusting the

Highpass

Crossover

.................................

Page

Adjusting the

Lowpass

Crossover

................................... Page

Adjusting the Sub Mono

Lowpass .................................. Page 9

Adjusting the Center Frequency

.................................. Page

Terms and Abbreviations

....................................................

Page

Warranty

.............................................................................

Page

XOM Specifications

Total Number of Outputs

Output Levels

Highpass

outputs

Slope

Minimum

F3*

Maximum F3

# F3 Points

Bandpass

outputs

Slope (lowside)

Minimum F3 (lowside)

Maximum F3 (lowside)

# F3 points

Slope (highside)

Minimum F3 (highside)

Maximum F3 (highside)

# F3 points

Bandpass 2

outputs

Slope (lowside)

Minimum F3 (lowside)

Maximum F3 (lowside)

# F3 points

Slope (highside)

Minimum F3 (highside)

Maximum F3 (highside)

# F3 points

Lowpass

outputs

Slope

Minimum F3

Maximum F3

# F3 points

*F3

= Cut Off Frequency

Each output adjustable

± 12dB

FL, FR, BL, BR

12 dB/Octave

Highpass

1,820 Hz

20,650 Hz

256 points per output

FL, FR, BL, BR

12 dB/Octave

highpass

125 Hz

15,000 Hz

256 points per output

12 dB/Octave lowpass

640 Hz

21,250 Hz

2.56 points per output

FL, FR, BL, BR

12 dB/Octave

highpass

68 Hz

1,888 Hz

256 points per output

12 dB/Octave lowpass

9.5 Hz

3,125 Hz

256 points per output

L, R (constant bass)

12 dB/Octave lowpass

57 Hz

3,000 Hz

256 points per output

-l-

Sub Lowpass

outputs

Slope

Minimum F3

Maximum F3

# F3 points

Center

Bandpass

outputs

Slope (lowside)

Minimum F3 (lowside)

Maximum F3 (lowside)

F3 points

Slope (highpass)

Minimum F3 (highside)

Maximum F3 (highside)

# F3 points

Electrical Specifications

Signal-To-Noise Ratio

Total Harmonic Distortion

Stereo Separation

Frequency Response

constant bass summed mono

24 dB/Octave lowpass

45 Hz

2,380 Hz

256 points

front summed mono

12 dB/Octave highpass

125 Hz

15,000 Hz

256 points

12 dB/Octave lowpass

640 Hz

21,250 Hz

256 points

90 dBA ref 0.750 Vrms output

97 dBA ref 2.300 Vrms output

0.03

ref 0.250 Vrms input

0.05 % ref 0.500 Vrms input

0.08

ref 0.750 Vrms input

20,000 Hz ± 0.1

Specifications subject to change

-2-

This manual describes the procedures for adjusting the electronic

crossover frequencies.

The XOM is one of the most versatile crossovers ever created. It takes

the four (4) preamplifier outputs from the Preamplifier Module

(PAM) and divides these signals into the following 16 outputs:

Front Left and Right Highpass

Front Left and Right Bandpass 1

Front Left and Right Bandpass 2

Back Left and Right Highpass

Back Left and Right Bandpass 1

Back Left and Right Bandpass 2

Left and Right Constant Bass

Lowpass

Summed Mono Constant Bass

Lowpass

Front Center Channel Bandpass

Each of the 16 outputs can be dynamically programmed via the

Remote Data Access Terminal (RDAT) to one of 256 possible cross-

over frequencies. In addition, the output levels may be varied over

±l2dB range.

-3-

Remote Data Access Terminal

The Remote Data Access Terminal (RDAT) is used to gain access to

all of SYMMETRY’s features. This unit consists of a Z-line by

40-

character supertwist back-lit LCD display.

Escape

Function-

Mute

Volume

Reset

Numeric

Zero Set

Enter

Function Keys

Volume/Muted Keys

Numeric Keys

ESC (Escape Key)

(ENTER Key)

Blue Arrow Keys

Zero Set Key

Blue

Arrow

Keys

Used to select various menu options avail-

able in SYMMETRY. To select an item

from the menu, press the function key

that is under the desired option.

The Up arrow key increases the volume;

the Down arrow key decreases the volume.

The mute key drops the audio by 20dB.

The 12 numeric keys are used for entering

your access code and future applications.

Returns you to the previous command or

menu. May also be used to cancel a

command, when necessary.

This key is reserved for future applica-

tions.

These keys are used for various functions

throughout the system.

This key is used for various functions

throughout the system.

-4-

The Xover Menu

The XOVERMenu contains the functions for adjusting the Highpass,

Bandpass 1, Bandpass 2, Lowpass, Sub Mono and Center crossover

frequency ranges.

Note: Settings can not be adjusted if the system is locked. See the

“Basic SYMMETRY Operator’s Manual” for more informa-

tion.

Newly adjusted crossover settings will remain unchanged when

SYMMETRY is turned off.

Selecting the Crossover Frequencies

The following instructions explain how to adjust a crossover setting.

From the Main Menu, press the function key directly under-

neath

XOVER. The first page of the CROSSOVER Menu is

displayed as follows:

* CROSSOVER MENU *

BP1 BP2 LP SUB

To display the second page press the blue Right arrow key.

The following is displayed:

lENTE,

* CROSSOVER MENU *

To return to the first page press the blue Left arrow key.

To return to the Main Menu from the first page press the ESC

key.

Adjusting the Highpass Crossover

The following instructions explain how to adjust the Highpass

crossover outputs.

From the first page of the XOVER Menu, select HP. The first

OUTPUT SELECTION screen is displayed. This menu en-

ables you to select the speakers on the left, right, or both left

and right sides of the vehicle.

XOM/ HP

LEFT RIGHT BOTH

Notice the message in the upper left-hand corner of the

screen. This indicates that you have selected the Highpass

crossover output.

2. Press the function key underneath the desired selection.

The second OUTPUT SELECTION screen is displayed.

This menu enables you to select the speakers in the front,

back, or both front and back areas of the vehicle. Notice

how the message in the upper left-hand corner is changed

to include

L=R.

This indicates that BOTH the left and right

sides of the vehicle were chosen in the previous screen. An

“R” in this position indicates that the Right side was se-

lected; an “L,” indicates the Left side.

-6-

The “HP, BP1 and BP2 Output Selection Table” below shows

the various combinations that may be selected.

HP, BP1 and BP2 SPEAKER SELECTION TABLE

First Output

Second Output

Results

Selection Screen Selection Screen

LEFT

RIGHT

BOTH

FRONT

BACK

BOTH

FRONT

BACK

BOTH

FRONT

BACK

BOTH

Left Front

Left Back

Left Front and Back

Right Front

Right Back

Riqht Front and Back

Left and Right Front

Left and Right Back

Left, Right, Front and

Back

Press the function key underneath the desired selection.

To return to the XOVER Menu press the ESC key once.

Once the desired crossover output is selected, its corre-

sponding CROSSOVER RESPONSE screen is displayed. Be-

low is an example of a HIGHPASS CROSSOVER RESPONSE

screen.

To increase the cutoff frequency (F3) press the

blue

Right

arrow key. To decrease, press the blue Left arrow key.

Notice how the graph changes as you adjust the cutoff

frequency, here indicating 5030 Hz.

Use the blue Up and Down arrow keys to adjust the selected

output’s level over a 112

range. To return this setting to

unity gain (0.0 dB) press the blue Zero Set Key.

When finished press the ESC key twice to return to the Main

Menu.

-7-

Adjusting the

Bandpass

1 &

Bandpass

Crossovers

The following instructions explain how to adjust the

Bandpass

and

Bandpass

2 Crossover outputs.

From the first page of the XOVER MENU, select either BP1

or BP2. The first OUTPUT SELECTION screen is displayed.

This menu enables you to select the speakers on the left,

right, or both left and right sides of the vehicle.

XOM/

BP1

LEFT RIGHT BOTH

Notice the message in the upper left-hand corner of the

screen. This indicates the crossover frequency you have

selected.

XOM/BPl

indicated

Bandpass

1 and

XOM/BP2

indicates

Bandpass

2. Press the function key underneath the desired selection.

The second OUTPUT SELECTION screen is displayed.

XOM/ BP1/L=R

FRONT BACK BOTH

This menu enables you to select the speakers in the front,

back, or both front and back areas of the vehicle. Notice how

the message in the upper left-hand corner is changed to

include L=R. This indicates that BOTH the left and right

sides of the vehicle were chosen. An

“R”

in this position

indicates that the Right side was selected; an

“L,”

indicates

the Left side.

See the “HP, BP1 and BP2 Speaker Selection Table” for the

various combinations that may be selected.

Press the function key underneath the desired selection,

To return to the XOVER Menu press the ESC key once.

-8-

4. Once the desired crossover output is selected, its corre-

sponding CROSSOVER RESPONSE screen is displayed. Be-

low is an example of a BANDPASS 1 CROSSOVER RESPONSE

screen.

dB = 0.0

F3 = 303

20 200 2k 20k

. . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

5. To adjust the high-side cutoff frequency (F3) press the

function key on the extreme

right. To adjust the low-side

cutoff frequency,press the function key on the extreme left.

To increase the cutoff frequency (F3) press the blue Right

arrow key. To decrease, press the

blue Left arrow key.

Notice how the cutoff graph changes as you adjust the

cutoff frequency, here indicating the lowpass frequency

cutoff at 303 Hz.

Use the blue Up and Down arrow keys to adjust the selected

output’s level over a ±l2dB range. To return this setting to

unity gain (O.O), press the

blue Zero Set Key.

When finished press the ESC key twice to return to the Main

Menu.

-9-

Adjusting the Lowpass Crossover

The following instructions explain how to adjust the

Lowpass

Crossover outputs.

From the first page of the XOVER MENU, select LP. The

output SELECTION screen is displayed. This menu enables

you to select the speakers on the left, right, or both left and

right sides of the vehicle.

XOM/ LP

LEFT RIGHT BOTH

Notice the message in the upper left-hand corner of the

screen. This indicates that you have selected the Lowpass

Crossover output.

Once the desired crossover output is selected, the LP CROSS-

OVER RESPONSE screen is displayed.

To increase the cutoff frequency (F3) range press the blue

Right arrow key. To decrease, press the blue Left arrow key.

Notice how the graph changes as you adjust the cutoff

frequency, here indicating 80 Hz.

Use the

blue Up and Down arrow keys to adjust the Lowpass

output’s level over a ±12dB range. To return this setting to

unity gain (0.0 dB) press the

blue Zero Set Key.

When finished press the ESC key twice to return to the Main

Menu.

-10-

Adjusting the Sub Mono Lowpass

Crossover

The following instructions describe the procedures for adjusting the

Crossover’s Mono Lowpass output.

Select SUB from the XOVER Menu. The SUB CROSSOVER’s

RESPONSE screen is displayed.

a”“““*

To increase the cutoff frequency (F3) press the blue Right

arrow key. To decrease, press the blue Left arrow key.

Notice how the graph changes as you adjust the cutoff

frequency, here indicating 202 Hz.

Use the blue Up and Down arrow keys to adjust the selected

output’s level over a ±12

range. To return this setting to

unity gain (0.0 dB) press the blue Zero Set Key.

When finished press the ESC key twice to return to the Main

Menu.

ll-

Adjusting the Center Crossover

This section describes the procedures for adjusting the Center

Crossover Response curve.

Press the blue Right arrow key to display the second page of

the XOVER Menu.

* CROSSOVER MENU *

CENTER

2. Select CENTER from the XOVER Menu. The CENTER

CROSSOVER’s RESPONSE screen is displayed.

= 0.0

F3 = 201

20 200 2k 20k

. . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. To adjust the high-side cutoff frequency (F3) press the

function key on the extreme right. To adjust the low-side

cutoff frequency press

the function key on the extreme left.

To increase the cutoff frequency (F3) press the blue Right

arrow key. To decrease, press the

blue

Left arrow key.

Notice how the graph changes as you adjust the cutoff

frequency, here indicating the lowpass cutoff frequency at

201 Hz.

Use the

blue

Up and Down arrow keys to adjust the selected

output’s level over a

±12

range. To return this setting to

unity gain (0.0

dB)

press the blue Zero Set Key.

When finished press the ESC key twice to return to the Main

Menu.

Note: To LOCK the Frequency Response settings from unautho-

rized individuals, see the “Basic SYMMETRY Operator’s

Manual.

”

-12-

Terms and Abbreviations

BP (band-pass filter):

BP1:

BP2:

dB (decibel):

dBA:

F3 (cutoff frequency):

Hz (hertz):

LP (lowpass):

HP (highpass):

A crossover circuit that combines a

low-

pass and high-pass filter to create a band

pass.

Bandpass section optimized for higher

frequencies.

Bandpass section optimized for lower

frequencies.

The unit used to measure the difference

between two levels of a sound or electri-

cal signal; a logarithmic expression of

the ratio of two such levels. An increase

of 10

represents a tenfold increase in

power. Doubling power raises the

Sound-Pressure-Level (SPL) by about 3

dB.

Decibels (A-weighted).

The point when a speaker system begins

to gradually roll off.

The standard unit of frequency. Mea-

surements in Hz represent cycles per

second, or changes away from a basic

state and back again. In audio, the basic

state is defined as either ordinary air

pressure (without sound) or its electri-

cal equivalent (constant-level DC sig-

nal). The higher the Hz figure, the higher

the sound’s pitch.

A circuit in a crossover network that

passes frequencies falling below a pre-

determined point and attenuates those

above.

A circuit in a crossover network that

passes frequencies falling above a prede-

termined point and attenuates those

below.

octave: An interval between two frequencies,

the higher of which is twice that of the

lower; in modern music, an octave is

eight notes of the scale.

passband:

The continuous spectrum of frequen-

cies transmitted by a filter, amplifier, or

similar device.

signal-to-noise ratio:

The specification which indicates how

much audio signal there is relative to

the noise under specified conditions. It

is the ratio of total audio output level to

the noise level expressed in

dB.

slope:

The rate at which a crossover attenuates

out-of-band frequencies. Expressed in

per octave, typical slopes are 6, 12,

and 18 per octave, with 12 being the

most common; the higher the number,

the faster attenuation occurs relative to

frequency.

sound pressure level

A measurement of acoustic energy

(SPL):

expressed in

dB.

total harmonic

distortion (THD):

The percentage of an audio output sig-

nal that consists of spurious harmonics,

or multiples of the fundamental fre-

quencies. These harmonics are intro-

duced by a power amplifier or other

component through which the signal

passes; lower figures are better.

14 -

Rockford

Fosgate warrants all electronics to the original consumer pur-

chaser to be free from defects in materials or workmanship for a period of

three (3) years parts and labor provided the product was purchased from an

Authorized SYMMETRY Dealer. This warranty does not apply to any

product on which the seals and/or serial number have been broken,

removed, tampered with, defaced or altered in any manner. This warranty

only applies to the original consumer purchaser and is not transferable.

Electronics found to be defective during the warranty period will be

repaired or replaced at Rockford Fosgate’s discretion. Repaired or replaced

electronics will be covered by the balance of the original warranty period

only.

Rockford

Fosgate shall not be responsible for any incidental or

consequential damages resulting from a defect in electronics. Some states

do not allow the exclusion or limitation of incidental or consequential

damages, so the previous limitation may not be applicable.

The warranty does not cover any appearance item, any cost or expense

related to the removal or reinstallation of the product, any accessory used

in conjunction with the product, or any damage to the product resulting

from alteration, accident, misuse or abuse. This warranty does not apply if

the parts or labor, which would otherwise be provided without charge

under this warranty, are obtained from any other source than

Rockford

Fosgate or an Authorized SYMMETRY Service Center.

This warranty is the only express warranty and does not create any implied

warranties. Rockford

Fosgate limits its obligations under any implied

warranties under state laws to a period not to exceed the written warranty

period. Some states do not allow limitation on how long an implied

warranty lasts, so the above limitation may not apply. This warranty

applies only to products sold in the United States of America or its

possessions. For warranty outside the U.S.A., please contact the nearest

Authorized SYMMETRY Dealer. This warranty gives the consumer specific

legal rights, and the consumer may have other rights which vary from state

to state.

A defective product must be shipped prepaid to the Authorized SYMMETRY

Dealer from which the consumer purchased the product or to the Rockford

Fosgate factory in Tempe, Arizona in the original factory carton or equiva-

lent. Any shipping loss or damage will be borne by the consumer or the

consumer’s shipper. A consumer returning a product to the factory should

call (800) 669-9899 for a Return Authorization Number. All shipments shall

be clearly marked with the Return Authorization Number on the outside of

the shipping carton.

Ship to:

Rockford

Corporation

Warranty Repair Department

205.5 E. 5th Street

Tempe, AZ 85281 U.S.A.

Return Authorization Number:

Rockford Fosgate

A Division of Rockford Corporation

546 South Rockford Drive

Tempe, Arizona 85281 U.S.A.

In U.S.A., (602) 967-3565 In Canada, call Korbon (416) 567-1929

In Europe, Fax (49) 421-487-877 In Pacific Asia, Fax (65) 339-0363

REV A. 11 /92

MAN-0031

Rockford Fosgate Symmetry XOM Owner's/Operator's Manual

Brand: Rockford Fosgate

Model: Symmetry XOM

Category: Musical Equipment

Type: Owner's/Operator's Manual

This manual is also suitable for

Download PDF

report

Rockford Fosgate Symmetry XOM Owner's/Operator's Manual

This manual is also suitable for

Rockford Fosgate Symmetry XOM Owner's/Operator's Manual

Related papers

Other documents