Rockford Fosgate ND8-XFM, ND4-XFM User Manual
AUDIO
phile
1" NEODYMIUM TWEETER
WITH HIGH PASS CROSSOVER
ND4-XFM & ND8-XFM
Owner's Manual
®®
Dear Customer,
Congratulations on your purchase of America’s finest brand of car audio
components. At Rockford Fosgate we are committed to musical
reproduction at its best, and we are pleased you chose our product.
Through years of engineering expertise, hand craftsmanship and critical
testing procedures we have created a wide range of products that
reproduce music with all the clarity and richness you deserve.
For maximum performance we recommend you have your new Rockford Fosgate product installed by an Authorized Rockford Fosgate
Dealer, as we provide specialized training through Rockford Technical
Training Institute (RTTI). Please read your warranty and retain your
receipt and original carton for possible future use.
To add the finishing touch to your new Rockford Fosgate image order
your Rockford accessories, which include 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 602-967-8590 in the
U.S. For Canada, call Korbon Trading at 416-567-1920. For international orders FAX 001-1-602-967-8132 or call 001-1-602-967-3565.
PRACTICE SAFE SOUND™
CONTINUOUS EXPOSURE TO SOUND PRESSURE LEVELS OVER 100 dB
MAY CAUSE PERMANENT HEARING LOSS. HIGH POWERED AUTO SOUND
SYSTEMS MAY PRODUCE SOUND PRESSURE LEVELS WELL OVER 130
dB. USE COMMON SENSE AND PRACTICE SAFE SOUND.
The serial number can be found on the outside of the box. Please be
sure to record it in the space provided below as your permanent record.
This will become useful in recovering your product if ever stolen and
serve as verification of your factory warranty.
Serial Number: ______________________________________
Model Number: ______________________________________
TABLE OF CONTENTS
Specifications ................................................................................... 1
ND4-XFM / ND8-XFM Neodymium Tweeter Contents..................... 1
Introduction ...................................................................................... 2
Design and Features ........................................................................ 2
TX-184N/188N High Pass Crossover ........................................ 2
ND4 and ND8 Neodymium Tweeters ........................................ 3
Flush Mounting the ND4/ ND8 Tweeters ......................................... 4
Surface Mounting the ND4/ ND8 Tweeters ...................................... 5
Wiring the ND4/ND8 Neodymium Tweeter ...................................... 6
Replacing the ND4/ND8 Dome ........................................................ 7
ND4/ND8 Neodymium Assembly Diagram ...................................... 9
Warranty Information...................................................................... 10
SPECIFICATIONS
ND4
Power Rating 50 Watts
Impedance with crossover 4Ω
Sensitivity with input of 1 Watt
measured at 1 meter 91dB
Resonance Frequency 1,500Hz
Frequency Response 3,000 - 20,000Hz
ND8
Power Rating 50 Watts
Impedance with crossover 8Ω
Sensitivity with input of 1 Watt
measured at 1 meter 91dB
Resonance Frequency 1,500Hz
Frequency Response 3,000 - 20,000Hz
TX-184N/TX-188N
Crossover Network 3rd order Butterworth Alignment
Crossover Frequency 4,000Hz High Pass
Crossover Slope 18dB/octave
Connections Polarized (.110" & .205") Faston
Terminals
ND4-XFM/ND8-XFM
NEODYMIUM TWEETER CONTENTS
1 pair ND4/ND8 Neodymium Tweeters
1 pair Flush Mount Cups
1 pair of surface mounting plates
1 pair TX-184N/188N High Pass Crossovers
Mounting Hardware
1
INTRODUCTION
This manual provides information on the features and
installation of the ND4 and ND8 Neodymium Tweeters
and high pass crossovers. We suggest you save this
manual for future reference.
We strongly recommend you have your Authorized
Rockford Fosgate Dealer install the ND4/ND8 Neodymium tweeters. If you do choose to install the tweeters
yourself, please be sure to read the entire manual
before beginning.
DESIGN AND FEATURES
This section describes the design and features of each
component in the ND4-XFM/ND8-XFM system.
TX-184N /
188N High
Pass
Crossover
Input and
Output
Connectors
Mounting the
TX-184N /
188N
The TX-184N/TX-188N High Pass Crossover is designed to enhance the performance capabilities of the
ND4 and ND8 Neodymium Tweeters. This compact
crossover is designed to conform to the following criteria:
• High pass crossover network centered at 4kHz.
• Straight forward 3rd order (18dB/octave) filter with a
Butterworth transfer function
• Small size, accomplished by inductors wound on a
high temperature nylon bobbin with an air core.
Mounting the TX-184N and TX-188N is accomplished
with the use of .110" & .205" Faston connectors. These
connectors are gold-plated to eliminate the possibility of
corrosion that can cause signal deterioration.
The TX-184N/188N is mounted to relatively flat surfaces with sheetmetal screws inserted into the mount-
2
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