Big speakers with a big sound.

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The Peavey SP series loudspeakers have been a mainstay of journeyman sound reinforcement for three decades, and the SP 4BX is the latest incarnation of this ever-improving legacy. It has dual 15” woofers that are each voiced differently thanks to an efficient crossover that directs low frequencies to both woofers while limiting midrange frequencies to only the top woofer.

Engineered for optimal sound reproduction with proven reliability, Peavey SP enclosures feature patented asymmetrical Quadratic Throat Waveguide technology that helps deliver pristine, precise sound; Black Widow® loudspeakers with Kevlar-impregnated cones, 4" ribbon-wire voice coils and exclusive field-replaceable baskets; the patented Radialinear Planar Phase Correction System; and titanium compression drivers with ferrofluid cooling.

Ideal for medium-sized clubs and even outdoor performances, these enclosures can go up against a loud drummer, two guitars and a bass player on a big rig with ease. Reasonably lightweight, loud and clear, they are an excellent solution for today’s gigging bands.

Peavey SP 4BX 3-Way Passive PA Speaker Cabinet Features:

Quasi-three-way, full-range, bi-ampable sound reinforcement system
2000 watts program, 4000 watts peak
Patented Asymmetrical Quadratic Throat Waveguide™ technology
Patented Radialinear Planar Phase Correction System
Sound Guard™ III tweeter protection
Two 15 inch BWX Black Widow® 4 inch voice coil woofers
Sensitivity: 100 dB (1W/1m) anechoic
Full-range inputs include a Neutrik® Speakon® 4 pin jack and two 1/4 inch phone jacks
Bi-amp capability via internal wiring jumper
Trapezoidal enclosure
HammerHead® durable covering material
RX™ 22 compression driver with ferrofluid cooling
Frequency Response: 52 Hz to 17 kHz (+/- 3 dB)
Pocket Casters

Peavey SP 4BX 3-Way Passive PA Speaker Cabinet Specifications:

Frequency response, 1 meter on-axis, swept-sine in anechoic environment:
52 Hz to 17 kHz (±3 dB)
Usable low frequency limit (-10 dB point):
45 Hz
Power handling:
Full range: 1,000 watts continuous 2,000 watts program 4,000 watts peak
Low frequency section: 1,000 watts continuous 2,000 watts program 4,000 watts peak
High frequency section: 60 watts continuous 120 watts program 240 watts peak
Sound pressure level, 1 watt, 1 meter in anechoic environment:
Full range: 100.0 dB SPL (2.83 V input)
Low frequency section: 101 dB SPL (2.83 V input)
Mid/high frequency section: 107 dB SPL (2.83 V input)
Maximum sound pressure level (1 meter):
Full range: 130 dB SPL continuous 136 dB SPL peak
Low frequency section: 131 dB SPL continuous 137 dB SPL peak
Passive mid/high frequency section: 129 dB SPL continuous 135 dB SPL peak
Radiation angle measured at -6 dB point of polar response:
90° horizontal by 40° vertical; the vertical main polar lobe is angled down 10° with respect to straight ahead being +10, -30°
Transducer complement:
Low frequency section: 2 x 15" woofer, vented Black Widow® 1508-8 HE SF
High frequency section: 1 x .875" exit /51 mm voice coil RXTM 22 compression driver on an asymmetrical Quadratic Throat CD horn
Box tuning frequency:
Low frequency section: 58 Hz
Crossover frequency (internal passive):
Low frequency – high frequency 1,800 Hz
Recommended Active Crossover Frequency Region and Slope:
Low Frequency – High Frequency: 1,800 Hz at 12 dB/octave
Time Offset:
Low frequency: 0.0 ms Mid/high frequency: 0.48 ms
Impedance (Z):
Full range: Nominal: 4.0 O Minimum: 3.4 O
Low frequency: Nominal: 4.0 O Minimum: 3.2 O
Passive HF: Nominal: 8.0 O Minimum: 5.4 O
Input connections:
Full range: two 1/4" phone jacks, one four-pin twist lock connector & bi-amp capability provided via an internal wiring jumper
Enclosure materials and finish:
Hardwood panel coated with Peavey’s heavy-duty HammerHeadTM finish. Casters are incorporated for portability.
Mounting provisions:
This unit is not designed for overhead suspension; Four large rubber feet on bottom for floor use.
Dimensions (H x W x D):
Front: 49.875” x 20.5” x 24.31” 1266.83 mm x 520.7 mm x 617.55 mm
Rear: 49.875” x 12.75” x 24.31” 1266.83 x 323.85 mm x 617.55 mm
Net weight:
130.5lbs. (59.2kg)