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SA-1 stand mount adapter built-in, and
four large rubber feet on bottom for
floor use.
Dimensions (H x W x D):
Front:
33.63 in. x 21.38 in. x 22.88 in.
854 mm x 543 mm x 581 mm
Rear:
33.63 in. x 14.25 in. x 22.88 in.
854 mm x 362 mm x 581 mm
Net weight:
92 lbs. (41.8 kg)
Features
• Three-way full range system
• RX
™
22 compression driver with ferrofluid
cooling
• 6.5" pro mid-range in sealed sub-
enclosure
• 15" BWX Black Widow
®
4" VC woofer
• 1,000 W program, 2,000 W peak
• Sound Guard
™
III tweeter and mid-range
protection
• Trapezoidal enclosure
• Stand mount adapter
Description
The latest version of the SP
™
3 has the
new BWX high power Black Widow woofer
incorporated, as well as a very nice
looking cabinet design. The SP 3X is a
three-way speaker system comprised of a
15" Black Widow BWX woofer with a
Kevlar
®
impregnated cone, a 6-1/2" pro
mid-range in a sealed sub-enclosure, and
an RX 22 compression driver loaded onto
a CH
®
3 constant directivity horn.
The SP 3X has a trapezoidal shaped
enclosure, which reduces the build-up of
standing waves inside the enclosure,
which minimizes mid-bass and mid-range
colorations due to the cabinet. It is
constructed of 3/4" OSB and is covered
with a durable black carpet. The enclosure
corners are reinforced with polymer caps,
and a black powder-coated expanded
metal grille covers the lower half of the
system to protect the woofer from external
damage. An SA-1 stand mount adapter is
built-in for ease of speaker stand use.
The three-way system consists of the
following driver components: a 15" Black
Widow BWX woofer with a Kevlar
impregnated cone, and a water-resistant
treated cone and dust cap for superior
environmental stability. Capable of over
500 W of continuous power handling (AES
Std 2-1984), the woofer can handle a lot
of sheer power. The mid-range is carried
by a 6-1/2" professional grade direct
radiator with a treated cone and
surrounded in a sealed sub-enclosure,
and it provides high articulation in the
vocals. The high frequencies are handled
by an RX 22 two-inch titanium diaphragm
compression driver utilizing ferrofluid
cooling, coupled to a CH 3 constant
directivity horn. This horn has a smooth,
even response with good high frequency
dispersion. The RX22 driver features the
Radialinear Planar Phase Correction
System, under US Patent 6,064,745,
which provides smoother and extended
high frequency response.
Input connection to the system is
made via two 1/4" phone jacks in parallel,
and a 4-pin Neutrik
®
switching jack is
provided for bi-amping flexibility while
maintaining superior signal integrity. The
internal passive crossover features
Peavey’s exclusive Sound Guard
protection circuit for both the tweeter and
the mid-range speaker, and an advanced
topology crossover with high performance
components, to provide high power
handling and reliability. Peavey’s
proprietary protection circuitry, Sound
Guard, provides long and medium-term
driver overload protection when the
system is used full-range, or when it is bi-
amped, without impairing musical
transients or dynamics on either the mid-
range or the tweeter. The crossover
provides driver roll-off and protection, as
well as driver EQ for the woofer, mid-
range and horn, the sum total is 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
54 Hz to 17 kHz. A crossover EQ switch is
provided to tailor the response in the mid-
range and highs, providing a nominally flat
frequency response position, and an EQ
position that pulls the mids and highs back
to help keep bright rooms from
overloading, or to help achieve a mellower
voicing for those applications that prefer it,
such as DJ use.
Despite its compact dimensions for a
15"-based 3-way enclosure, this system
can put out some very serious sound
levels, and take 1,000 Watts program of
clean amplifier power, resulting in
excellent clarity and reliability.
Frequency Response
This measurement is useful in
determining how accurately a given unit
reproduces an input signal. The frequency
response of the SP 3X 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 3X combine to give a
smooth frequency response from 54 Hz to
17 kHz.
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
60
70
80
90
100
110
dB SPL (re 20 Pa)
Amplitude Response (1W 1m On-Axis)
EQ
Normal
Switch Position
Figure 1
20 50 100 200 500 1k 2k 5k 10k 20k
Frequency (Hz)
1
2
3
5
10
20
30
50
100
Impedance
Z
(
)
Figure 2