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PEAVEY ELECTRONICS
1508-8 alcp Pro Rider
®
00560270
1508-8 cucp Pro Rider
®
00560250
The Pro Rider® driver series
represents a new level of power
and performance for Black Widow®
loudspeakers. These outstanding
drivers have a power handling rating
of 1,200 Watts program, along with
high efciency, reduced distortion
and excellent overall sound quality.
The series includes two 15” models
in 8 Ohm impedance, suitable
for both subwoofer and woofer
applications.
DESIGN
The Pro Rider series uses a new
cone that is a variation on the
existing Kevlar® impregnated cones
used on all Black Widows. The new
cone is stronger and tougher, highly
water-resistant and has a specially
designed deep roll accordion
surround. The dust cap is also
made of the same extremely strong
material.
Voice coil assemblies on the new
drivers use thermoset insulated
aluminum or copper ribbon wire,
edge wound and bonded onto an
incredibly durable, heat resistant
polyimide composite former. The coil
wires are solderless diffusion welded
to high conductivity OFHC copper
foil leads which are embedded
inside the former assembly and
attached to the tinsel leads with
high temperature silver solder. The
solder joint is then coated with a
special thermally conductive silicone
adhesive for encapsulation and heat
dissipation.
The voice coil assembly is bonded
to the Kevlar cone and new super
tough nylon composite spider
using a thermoset epoxy originally
developed for attaching nose
cones on ICBM missiles – truly an
aerospace grade adhesive. The
spider and surround are bonded
to the frame with a high strength
adhesive.
Te magnet structure includes subtle
changes to its geometry that improve
power handling. While it appears the
same as the standard structure, and
the replacement baskets from the
Pro Rider series will t on standard
BW magnet structures, the improved
power handling will be compromised
if the standard structure is used.
The vent plate assembly used on
Low Rider® drivers to increase power
handling is included in the Pro Rider
series. This results in a signicant
improvement in power handling
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capabilities and long-term power
compression.
These new drivers also adhere to
the familiar features of Black Widow
products: Cast aluminum frames,
replaceable basket assemblies,
Rubatex® gaskets and highly
reliable, spring loaded terminals are
all used.
APPLICATION
The Pro Rider drivers are superior
choices for a wide range of sound
reinforcement, high level playback,
subwoofer and monitor applications.
The 1508-8 alcp Pro Rider driver
is an excellent choice for general
purpose sound reinforcement. The
enclosure size is reasonable and its
performance form sub bass to upper
mid-range is strong. Its versatility
included vented and bandpass
enclosure designs.
The 1508-8 cucp Pro Rider is
specically optimized for amazing
bass performance in very small
vented enclosures, along with at
mid-bass and mid-range response
for an accurate, clean sound quality.
It is an excellent choice for compact
enclosures, multi- driver subwoofers
and monitors where enclosure size
is limited.
Pro Riders can work with crossover
points as high as 2.0 kHz, but work
best below 1.5 kHz. They deliver
excellent performance in both woofer
and subwoofer applications.
ENCLOSURES
To assist with the growing interest
in home built enclosure designs,
Peavey provides complete
parameter data on these drivers,
as well as several recommended
enclosures for each model. This
information and much more can be
found at www.peavey.com.
The strength of the completed
enclosure has a great effect on the
bass performance of the nished
system. Box panels that aren’t stiff
enough will vibrate, canceling bass
produced by the woofer and creating
undesired sounds of their own. If
your box vibrates or you don’t think
the box panels are stiff enough, add
more bracing.
Vents used in the examples require
standard Schedule 40 PVC pipe for
vent construction. The pipe should
be dadoed tightly into the back of the
bafe and glued rmly in place with
high quality epoxy or high strength,
industrial grade hot glue. Rough up
the outside of the pipe to improve
the glue bond.
Be sure to account for the
displacement of the vent, bracing,
horn (if used) and woofer or your
enclosure before building it or it will
be smaller than its intended volume.
This can reduce bass output and
mis-tune the enclosure.
Line the inside of the enclosure
with polyester ber batting such as
quilt stufng. The batting material
should conform to California bedding
re codes. Attach the batting with
spray adhesive or staples and
keep material away from the end
of the vent tube where it can be
pulled in by air ow. Handles,
protective corners, cabinet covering,
grille materials and crossovers
are available through Peavey
Accessories.
When building a bandpass
enclosure, design a panel or door
to be removable for access to the
woofer. Use foam weather-strip to
seal the panel along with enough
screws and bracing to prevent leaks
and buzzes. Fill the sealed volume
loosely with polyester ber, but leave
the vented volume empty. Place the
magnet of the woofer in the vented
side for improved cooling.
Peavey does not supply hardware
required for the manufacturing of
ying systems, and recommends
that builders should not suspend
or y any enclosure not certied for
such applications.
These instructions are a general
guideline for design. Proper
construction techniques, good
planning and common sense will
result in a reliable, high quality, high
performance system.
Peavey in on way accepts liability for
any damage, accidents or injury that
may result from construction or use
of enclosure using this information.
PARAMETERS
Thiele-Small parameters for Low
Rider subwoofers follow. This data
is for use in designing enclosures.
Numerous software packages
are available that use this data to
simulate the response of the driver
and enclosure together for optimum
performance in any application.
PARAMETER DEFINITIONS
Znom: The nominal impedance of the driver in
Ohms.
Revc: DC resistance of the driver in ohms, also
known as Re.
Sd: The functional radiating surface area of the
cone assembly in meters 2.
BL: Efciency of the voice coil and magnet
system in Tesla meters.
Fo: Free air resonance. Also known as Fs.
Vas: Volume of air having the same compliance
(springiness) as the driver’s suspension.
Cms: Restorative force of the driver’s
suspension in micrometers/Newton.
Mms: The total mass of the moving parts of the
loudspeaker, including the air load, in grams.
Qms: Resonance characteristics of the
mechanical factors of the loudspeaker.
Qes: Resonance characteristics of electrical
factors of the loudspeaker.
Qts: Resonance characteristics of the electrical
and mechanical factors combined together.
Xmax: Distance the cone can move in one
direction before the coil begins to leave the
magnetic gap.
Le: Inductance of the voice coil in millihenries.
SPL: Typical sound pressure level at 1 watt, 1
meter.
no: Electrical to acoustical conversion efciency
in percent.
Vd: Air displacement of the driver from negative
Xmax to positive Xmax.
Pmax: Maximum continuous program power in
watts.
Disp: Volume displaced by the driver inside the
cabinet when mounted on its rear ange
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SPECIFICATIONS 1508-8 alcp Pro Rider® 1508-8 cucp Pro Rider
®
Part # 00560270 00560250
Size: 15” 15”
Impedance: 8 Ohms 8 Ohms
Power Capacity: 2,400 Watts peak 2,400 Watts peak
1,200 Watts program 1,200 Watts program
600 W continuous per AES 2-1984, 600 W continuous per AES 2-1984,
Sensitivity: 96.3 dB / 1 Watt, 1 Meter 97.9 dB / 1 Watt, 1 Meter
Usable frequency range: 35 Hz ~ 2 kHz 35 Hz ~ 2 kHz
Cone: Kevlar® impregnated cellulose Kevlar® impregnated cellulose
Voice coil dia: inches / mm 4.0” / 100 4.0” / 100
Voice coil material: Aluminum ribbon wire Copper ribbon wire
Polyimide-impregnated Polyimide-impregnated
berglass former berglass former
Nomex® stiffener Nomex® stiffener
Solderless diffusion welded Solderless diffusion welded
OFHC copper leads OFHC copper leads
Net weight: 18 lbs. / 8.2 kg 18 lb. / 8.2 kg
Znom(Ohms) 8 8
Revc (Ohms) 5.80 5.70
Sd (M2) 0.084 0.084
BL (T/M) 16.50 22.70
Vas (liters) 188.2 208.0
Fo, (Hz) 40.4 34.8
Cms (uM/N) 187.8 207.6
Mms (gm) 82.50 100.50
Qms 8.73 8.78
Qes 0.450 0.242
Qts 0.428 0.235
Xmax (mm) 4.6 4.6
Le (mH) 0.41 0.51
SPL (1 WATT 1 M) 96.3 97.9
No (%) 2.70 3.50
Vd (milliliters) 47.1 / 773 47.1 / 773
Pmax (Watts pgm.) 1,200 1,200
Disp (inches3) / milliliters 209 / 3426 209 / 3426
Replacement Basket 00560280 00560260
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SUGGESTED ENCLOSURES
For those who want to build their own enclosures but don’t want to go through the design process using driver
parameters, Peavey provides the following optimized designs:
ENCLOSURE NET VOLUME VENT DIAMETER VENT LENGTH Vb BOX TUNING F3, -3 Db
Cubic feet/liters (qty) inches/mm inches/mm frequency in Hz point in Hz
Small Vented Box 3.0 / 84.9 (2) 4” / 102 6 7/8” / 175 45 51
Medium Vented Box 4.0 / 113.3 (2) 4” / 102 5” / 127 43 45
Large Vented Box 5.0 / 141.6 (2) 4” / 102 4 3/8” / 111 40 41
Single-Reex Bandpass Sealed: 2.25 / 63.7
Vented: 1.75 / 49.6 (2) 6” / 152 8” / 203 83 48 – 138
For 1508-8 alcp Pro Rider®:
1. Small Vented Box
Excellent performance for compact, general purpose use. Warm mid-bass response. F3 is 50 Hz
2. Medium Vented Box
Terric compromise of bass performance and enclosure size. Warm mid-bass response. F3 is 44 Hz
3. Large Vented Box
Big box, big bass! Great as a subwoofer or the bottom end of a large multi-way enclosure design. F3
is 40 Hz
4. Single Reex Bandpass enclosure
Special enclosure design that uses the enclosure as an acoustic lter for shaped response. Great
choice for a compact subwoofer system. Response is 47 Hz – 135 Hz
For 1508-cucp Pro Rider®:
1. Small Vented Box
A small enclosure with outstanding bass performance for its size. F3 is 61 Hz
2. Medium Vented Box
Small box with powerful bass and predictable, at response down to an F3 is 50 Hz
3. Large Vented Box
Strong, at response with bass extension to an F3 is 45 Hz. Deep, predictable bass quality for great
subwoofer and multi-way system performance.
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1 0 Fr eq ue n cy , H z 5 0 1 00 Hz 50 0 1 K
S P L , d B
1 0 0
9 5
9 0
8 5
8 0
7 5
7 0
6 5
6 0
P r o R i d e r 1 5 c u c p : S m a l l v e n t e d 1 . 5 c f F b 5 3
P r o R i d e r 1 5 c u c p : M e d i u m v e n t e d 2 . 2 5 c f F b 5 1
P r o R i d e r 1 5 c u c p : L a r g e v e n t e d 3 . 0 c f F b 4 9
1 0 F r e qu en c y, Hz 50 10 0 H z 5 0 0 1K
S P L , d B
1 0 0
9 5
9 0
8 5
8 0
7 5
7 0
6 5
6 0
P r o Ri d e r 1 5 a lc p : S m a l l v e n t e d 3 . 0c f F b 4 5
P r o Ri d e r 1 5 a lc p : M e d i u m v e n t e d 4 .0 c f F b 4 3
P r o Ri d e r 1 5 a lc p : L a r g e v e n t e d 5 . 0c f F b 4 0
P r o R i d e r 1 5 a l c p : S i n g l e r e f l e x b a n d p a s s 4 . 0 c f
1 0 Fr eq ue n cy , H z 5 0 1 00 Hz 5 0 0 1K
S P L , d B
1 0 0
9 5
9 0
8 5
8 0
7 5
7 0
6 5
6 0
P r o Ri d e r 1 5 a lc p : S m a l l v e n t e d 3 . 0c f F b 4 5
P r o Ri d e r 1 5 a lc p : M e d i u m v e n t e d 4 .0 c f F b 4 3
P r o Ri d e r 1 5 a lc p : L a r g e v e n t e d 5 . 0c f F b 4 0
P r o R i d e r 1 5 a l c p : S i n g l e r e f l e x b a n d p a s s 4 . 0 c f
Vented Single Reex
Bandpass
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Peavey
Pro Rider®
speakers
feature convenient
eld-replaceable
1
2
baskets. Replaceable
baskets eliminate the
need for re-coning
speakers and the
frustration and delays
associated with the
re-coning process. It
only takes a few minutes
to replace a basket
and you are back in
business. It just can’t get
any easier than the four
steps outlined here.
3
Baskets are replaced in four easy steps:
1 Remove three screws on back of magnet structure.
2 Lift the magnet structure off the basket frame.
3 Clean the voice coil “gap”.
4 Align screw holes, lower structure into place on new
basket frame, insert screws and tighten.
4
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Logo referenced in Directive 2002/96/EC Annex IV
(OJ(L)37/38,13.02.03 and defined in EN 50419: 2005
The bar is the symbol for marking of new waste and
is applied only to equipment manufactured after
13 August 2005
ONE YEAR LIMITED WARRANTY
NOTE: For details, refer to the warranty statement. Copies of this statement may be obtained online at www.peavey.com.
Kapton® is a registered trademark of DuPont.
Kevlar® is a registered trademark of DuPont.
Nomex® is a registered trademark of DuPont.
Rubatex® is a registered trademark of Rubatex Corporation.
Features and specications subject to change without notice.
Peavey Electronics Corporation • 5022 Hartley Peavey Drive • Meridian • MS • 39305
(601) 483-5365 • FAX (601) 486-1278 • www.peavey.com
©2011 Printed in the U.S.A. 3/11 80306028
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