Skip to main content Skip to footer
Call and save 18% off a single item $49 or more, now thru Dec. 18

Peavey SP 4BX 3-Way Passive PA Speaker Cabinet

Item #: 
  • Write a Review

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" woof... Click To Read More About This Product

We're sorry—we no longer carry this item.

Find a similar product below or contact us for a recommendation of a great alternative.

Call: 866-498-7882 Email or Chat

Recommended Products

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.


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
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 Î Minimum: 3.4 Î
Low frequency: Nominal: 4.0 Î Minimum: 3.2 Î
Passive HF: Nominal: 8.0 Î Minimum: 5.4 Î
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)
  • Customer Reviews

Review Snapshot

by PowerReviews
PeaveySP 4BX 3-Way Passive PA Speaker Cabinet

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to Top

(2 of 3 customers found this review helpful)


don't waste your money

By jeffrey

from townsend de

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

the specs from peavey's website states these cabinets are constructed of hardwood. the only wood is the face that the speakers are mounted to. the rest of the cabinet is glorified cardboard.the exterior covering is so thin that every little bump results in a tear and a gouge. they are complete junk.

Displaying review 1

Back to Top

You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.