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Description
The SP
5BX is a two-way speaker
system comprised of a high output
15” Scorpion
®
Plus HO woofer with
a Kevlar
®
-impregnated cone and an
RX
™
22 compression driver loaded
onto a patented Quadratic Throat
Waveguide
™
.
The SP
5BX has a trapezoidal-shaped
enclosure, which reduces the
buildup of standing waves
inside the enclosure to minimize
mid-bass and midrange coloration.
The enclosure is constructed of
a hardwood panel coated with
Peavey’s heavy-duty HammerHead
™
UV stabilized polyurea finish
for increased durability and
ruggedness. A full-length,
wrap-around perforated steel grille
protects the front of the enclosure.
A built-in SA-1 stand-mount adapter
accommodates speaker stand use.
The low frequencies are supplied
by a 15” Scorpion Plus HO woofer
with a Kevlar-impregnated cone
and a highly linear suspension. The
high frequencies are handled by
a 2” RX 22 titanium diaphragm
compression driver utilizing
ferrofluid cooling. This superb driver
is coupled to a Quadratic Throat
Constant Directivity Waveguide
(U.S. Patent #6,059,069) to
provide smooth, even response,
low distortion and good high
frequency dispersion. This horn
has an asymmetrical vertical polar
response, aiming the main energy
lobe down 10 degrees so it is aimed
at the audience instead of over their
heads. This helps reduce ceiling
reflections, ensuring greater clarity
and gain before feedback. The
RX22 driver features the Radialinear
Planar Phase Correction System
(U.S. Patent #6,064,745), which
provides smooth and extended high
frequency response.
Input connection to the system is
made via two 1/4” phone jacks and
one four-pin twist lock connector
in parallel. The internal passive
crossover features Sound Guard
™
III tweeter protection circuit and an
advanced topology crossover with
high-performance components to
provide high power handling and
reliability.
Sound Guard, Peavey’s proprietary
high frequency driver protection
circuitry, provides long- and
medium-term driver overload
protection without impairing musical
transients or dynamics when the
system is used full range. The
crossover provides driver roll-off
and protection as well as driver
EQ for the woofer and horn for a
clean, clear and smooth response.
High-quality, reliable crossover
components include polypropylene
capacitors and high-current
inductors. The optimal integration
of the crossover with the selected
drivers results in a smooth frequency
response from 69 Hz to 17 kHz.
Despite its compact dimensions,
this system can produce very high
sound levels and handle 800 watts
program power, resulting in clean
coverage with high articulation and
long-term reliability.
Frequency response
This measurement is useful in
determining how accurately a given
unit reproduces an input signal. The
frequency response of the SP 5BX is
measured at a distance of 1 meter
using a 1 watt (into the nominal
impedance) swept-sine input signal.
As shown in figure 1, the selected
drivers in the SP 5BX combine to
give a smooth frequency response
from 69 Hz to 17 kHz.
Power handling
There are many different approaches
to power handling ratings. Peavey
rates this loudspeaker system’s
power handling using a full-range
form of the AES Standard 2-1984.
Using audio band 20 Hz to 20 kHz
pink noise with peaks of four times
the RMS level, this strenuous test
signal assures the user that every
portion of this system can withstand
today’s high technology music.
This rating is contingent upon
having a minimum of 3 dB amplifier
headroom available.
Harmonic distortion
Second and third harmonic
distortions vs. frequency are plotted
in figures 3 & 4 for two power
levels. Ten percent (10%) of rated
input power and either one percent
(1%) of rated input power or 1 watt,
whichever is greater. Distortion
is read from the graph as the
difference between the fundamental
signal (frequency response) and the
desired harmonic. As an example, a
distortion curve that is down 40 dB
from the fundamental is equivalent
to 1% distortion.
Mounting
This unit is not designed for
overhead suspension. The SA-1
stand-mount adapter may be
incorporated, and four large rubber
feet are included on the bottom for
floor use.
SPECIFICATIONS SP
™
5BX