Peavey RADIAL X 22 User Manual

SPECIFICATIONS

THROATPARAMETER:

1" (25 mm)

NOMINAL IMPEDANCE:

8 ohms

MINIMUM IMPEDANCE

5.1ohms

DC RESISTANCE:

4.7 ohms

POWER CAPACITY1000 Hz to 20,000 Hz:

280 watts peak power
140 watts program
70 watts continuous using pink
noise band limited from 1000 Hz to 20 kHz
(AES 2-1984)

POWER CAPACITY500 Hz to 20,000 Hz:

240 watts peak power
120 watts program
60 watts continuous using pink
noise band limited from 500 Hz to 20 kHz

SENSITIVITY:

111 dB SPL 1 watt at 1 meter
on-axis on a 90oH X 45oV horn

NOMINAL EFFICIENCY:

30%

FREQUENCY RESPONSE:

500 Hz to 20,000 Hz

RECOMMENDED CROSSOVER:

1200 Hz at 12 dB/Octave

LOWEST RECOMMENDED
CROSSOVER:

500 Hz at 12 dB/Octave

DIAPHRAGM:

Commercially pure titanium

VOICE COIL DIAMETER:

2.0" (50.8 mm)

VOICE COIL MATERIAL:

Edge-wound copper-clad aluminum ribbon
with a high temp composite bobbin

FLUX DENSITY:

17,500 gauss (1.75T)

DIMENSIONS:

5.250" (133.33 mm) diameter x

3.05" (77.4 mm) depth

HORN COUPLING DIAMETER:

7/8" (22.2 mm)

HORN COUPLING THREADS:

Standard 1 3/8" — 18

NET WEIGHT:

5 lbs. 6 oz.

SHIPPING WEIGHT:

6 lbs. 5.5 oz.

DESCRIPTION

The Rx™22, referred to as the Radial X
compression driver, is one of the latest advances in
compression driver design and manufacturing for
Peavey Electronics. The Radial X has been designed
to improve driver performance, reliability, increased
power handling, and the linearity of diaphragm
excursion. With over 25 years experience in
compression driver design and manufacturing,
Peavey is proud to introduce the-all new Rx

™

22

compression driver to its line of speakers.

The Rx22 is engineered for a more transparent
high end, less distortion and overall improvement to

your sound system. If you are planning to upgrade
your system with a Rx22 or purchase a system with
the Rx22, as soon as you hook it up you’ll hear the
difference. You’ll be astonished at the improvement
of the new Rx22 has over older compression driver
technology.

MECHANICS

The Rx22 is designed with a solid one-piece
titanium diaphragm and has received a patent (pat.
num. 6,064,745) for a Radialinear™phase plug. It
also includes an all-new magnet structure, designed
with the latest tools in finite element analysis.

The Rx22 has more power handling, by as
much as 50%, as compared to similar compression
drivers. Our research and development team utilized
the latest technological advances in metallurgy,
polymer science and adhesives to bring you the
Rx22 driver.

The new Radialinear

™

phase plug was
developed for a smoother, more linear frequency
response with less distortion. The radialinear phase
plug improves the high frequency response of the
Rx22 by focusing the acoustical energy of the
diaphragm to a central point within the throat of the
horn. By focusing the acoustical energy we have
reduced the level of high frequency cancellations
and diffraction that are present in most other
compression driver designs.

The Rx22 incorporates a full two-inch voice
coil optimized in part through means of finite
element analysis. It is constructed with a new high­temperature composite coil former and edge-wound
copper-clad aluminum ribbon wire for an increase in
the overall motor efficiency. The diaphragm is

SPECIFICATIONS

Model Rx™22
Extended High
Frequency
Compression Driver
Patented

constructed of an integral one-piece titanium
diaphragm/suspension assembly. The one-piece
titanium diaphragm reduces the amount of moving
mass, extending the high frequency response of the
driver.

The Rx22 magnet structure has been reshaped
internally to focus the magnetic energy across every
turn of the voice coil for lower distortion and
improved linearity. The Rx22 incorporates the latest
in ferrofluid technology. Peavey engineering has
teamed up with the experts in the field of ferrofluid
engineering to develop a special ferrofluid just for
the Rx22. This in part is another reason for
improved power handling, improved high frequency
response and a cleaner crisper high end.
Ferrofluid is a thin, synthetic oil-based liquid
holding billions of submicroscopic magnetic
particles in suspension. It surrounds the voice coil
for a controlled heat transfer. It essentially conducts
the heat away from the voice coil, transferring it into
the surrounding metal of the magnet structure. This
in turn reduces the amount of power compression by
lowering the voice coil temperature and improves
the life of the Rx22 compression driver. One key
characteristic of ferrofluid is its ability to dampen
resonance modes within a speaker system. The

special grade of ferrofluid engineered for the Rx22
has been optimized for enhanced sound quality and
performance.

Every Rx22 driver is subjected to a complete
series of computer-control tests designed to ensure
total adherence to specifications.

APPLICATIONS

The Rx22 has been designed and engineered
for use with Peavey horns. However, any horn may
be used as long as it consists of a standard 1 3/8" –
18 standard thread coupling. The Rx22 is an
excellent choice for upgrading an older system with
minimal expense.

DESIGNER NOTES:

The Rx22 driver is designed for use between
the frequencies of 500 Hz to 20 kHz. However, we
have found through years of experience as crossover
designers for commercial applications that optimum
driver performance can be achieved if the engineer
limits the crossover design to 1000 Hz as compared
to the 500 Hz lower limit of the driver. The 1000 Hz
limit will greatly improve reliability plus improve
the power handling by an extra 15% over the
500 Hz limit.

INSTALLATION-DIAPHRAGM
REPLACEMENT:

Female spade lugs (supplied with each Rx22)
should be used for connecting the leads from the
crossover to the terminals on the Rx22. This will
permit rapid field diaphragm replacement in the
unlikely event of failure. The Rx22 diaphragm
replacement kits are available from Peavey dealers
and include complete gap cleaning instructions. (To
prevent gap contamination by foreign materials, a
failed diaphragm assembly should not be removed
before a new diaphragm assembly is ready to be
installed.)

LIMITED WARRANTY:

Peavey Model Rx22 compression drivers are
warranted to the original purchaser to be free from
defects from materials and workmanship 1 year after
purchase date. Warranty status shall be determined
by the authorized Peavey dealer or by Peavey upon
inspection of inoperative unit at the factory. See
warranty sheet for details.

Rx™22 Graphs

Features and specifications subject to change without notice.

Peavey Electronics Corporation • 711 AStreet • Meridian • MS • 39301

[phone] • FAX [phone] • www.peavey.com

©2000 Printed in the U.S.A. 8/00

80304742

Amplitude Response (1W 1m On-Axis)

120

110

100

90

dB SPL (re 20 Pa)

80

70

20 50 100 200 500 1k 2k 5k 10k 20k

Figure 1

Frequency (Hz)

Impedance

50
40

30
20

Z

(

)

10

5
3

2

1

20 50 100 200 500 1k 2k 5k 10k 20k

Figure 2

Frequency (Hz)