Loyola Enterprises

A veteran and minority owned SDB Certified Business.


SP 4

757.498.6118 Ext - 109SP 4 - Call for pricing - Dual 15-inch 1200 watt - 00586520


PDFSP 4 Specifications (pdf)

The SP 4 is a quasi three-way speaker system comprised of two 15" Black Widow BWX SF series woofer with Kevlar® impregnated cones, and an RX™22 compression driver loaded onto a constant directivity Quadratic Throat Waveguide.

The SP 4 has a trapezoidal-shaped enclosure, which reduces the buildup of standing waves inside the enclosure to minimize mid-bass and mid-range coloration. The enclosure is constructed of aspen hardwood plywood augmented with dual-layered top and bottom panels, covered with heavy duty, textured black Hammertex™ and reinforced with high-impact plastic corners. A full-length, wrap-around perforated steel grille protects the front of the enclosure.

The two-way system consists of the following driver components: two 15" Black Widow BWX SF series woofers with Kevlar impregnated cones and dust caps. The woofer section is capable of over 1,000 Watts of continuous power handling (AES Std 2-1984). The high frequencies are handled by a 2" RX™22 titanium diaphragm compression driver utilizing ferro fluid 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 reduces ceiling reflections and ensures greater clarity and gain before feedback. The RX™22 driver features the Radialinear Planar Phase Correction System (U.S. Patent 6,064,745), which provides a smooth and extended high frequency response.

Full-range input connection to the system is made via two ¼" phone jacks and a four-pin Neutrik jack in parallel, and bi-amping flexibility is provided via an internal jumper that can be accessed by unscrewing and removing the input cup. The internal passive crossover features the Peavey-exclusive Sound Guard protection circuit for the tweeter and an advanced topology crossover with high-performance components to provide high power handling and reliability. Sound Guard provides long- and medium-term driver overload protection without impairing musical transients or dynamics on either the mid-range or the tweeter when the system is used full range or when it is bi-amped. 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 52 Hz to 17 kHz.

Despite its compact dimensions, this system can produce very high sound levels and handle 2,000 watts program power, resulting in high articulation and long-term reliability.


  • Quasi-three-way, full-range, bi-ampable sound reinforcement system
  • RX™22 compression driver with ferrofluid cooling
  • Two 15" BWX Black Widow® 4" VC woofers
  • Patented Quadratic Throat Waveguide™ technology
  • Asymmetrical horn aims the sound down 10 degrees, at the audience, not over their heads
  • Sound Guard™ III tweeter protection
  • Full-range inputs include a Neutrik® Speakon® 4 pin jack and two ¼" phone jacks
  • Bi-amp capability via internal wiring jumper
  • Trapezoidal aspen hardwood enclosure
  • Hammertex durable covering material

Architectural and Engineering Specifications

The loudspeaker system shall have an operating bandwidth of 52 Hz to 17 kHz. The nominal output level shall be 100.0 dB when measured at a distance of one meter with an input of one watt. The nominal impedance shall be 4.0 ohms. The maximum continuous power handling shall be 1,000 watts, with maximum program power of 2,000 watts, peak power input of at least 4,000 watts and a minimum amplifier headroom of 3 dB. The nominal radiation geometry shall be 90 degrees symmetrical about the center axis in the horizontal plane, and +10, -30 degrees about the center axis in the vertical plane. The outside dimensions shall be 50.63 inches high by 20.55 inches wide by 23.00 inches deep. The weight shall be 127 pounds. The loudspeaker system shall be a Peavey model SP 4.

Frequency Response (±3dB) 52 Hz–17 kHz Power Handling (full range) 1000 W cont. / 2000 W prog. / 4000 W peak
Frequency Range (-10dB) 45 Hz–17 kHz LF Power Handling 1000 W cont. / 2000 W prog. / 4000 W peak
Sensitivity (full/LF/HF) 100 dB / 101 dB / 107 dB HF Power Handling 60 W cont. / 120 W prog. / 240 W peak
Max SPL/ 1m (calc) 137 dB Crossover Frequency 1800 Hz
Coverage (HxV) 90° x 40° Nominal Impedance (full/LF/HF) 4 Ω / 4 Ω / 8 Ω
Box Tuning Frequency 58 Hz Minimum Impedance (full/LF/HF) 3.4 Ω / 3.2 Ω / 5.4 Ω
Input Connections (2) ¼" phone, (1) 4-pin Neutrik Speakon Enclosure Material Aspen Plywood w/ Hammertex™ finish
Transducers (LF/HF) (2) Black Widow® 1508-8 HE SF / RX22 Mounting Provisions NOT designed for suspension, Built-in SA-1 stand adapter, 4 rubber feet for floor use
Dimensions (HxWxD) 128.6 x 52.2 x 58.4 cm
(50.6" x 20.6" x 23.0")
Weight 56.6 kg (127 lbs)
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or