Peavey SP 4BX 2-way Floor-Standing Stage Speaker

Quasi-three-way, full-range, bi-ampable sound reinforcement system!

Availability: Available For Order

Peavey SP® 4BX Speaker

More Views


Peavey SP 4BX - Dual 15 Inch - Three way Cabinet - 2000 watts has an ingenious 3-way design that improves low-end performance and produces clearer sound in the high frequency range!

This quasi three-way enclosure has two 15 inch Peavey Black Widow® speakers capable of handling up to 4000 watts peak power and have field replaceable baskets for quick, easy repair. Peavey engineers have designed a much more efficient crossover that directs low frequencies to both woofers while limiting mid-range frequencies to only the top woofer. Upper-mids and high frequencies are handled by an RX 22 titanium driver that is ferrofluid cooled for maximum tweeter performance and longevity. Peavey's exclusive Quadratic Throat Waveguide technology actually reduces horn distortion and aims sound directly at the audience, not over their heads. Rugged hardwood construction, utilizing extensive internal bracing produces tighter bass response while significantly reducing the cabinet weight. Finished in a durable thick black carpet the SP® 4BX has heavy-duty handles and kick back wheels for easy transportation.

Additional Information

SKU PV1200
Manufacturer Peavey
MPN 03586520

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

Technical 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 RX™ 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 1,800Hz
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 Ω - Minimum: 3.4 Ω
Low frequency: Nominal: 4.0 Ω - Minimum: 3.2 Ω
Passive HF: Nominal: 8.0 Ω - Minimum: 5.4 Ω


Weight Packed: 133.49 lb(60.55 kg)
Width Packed: 25.75"(65.405 cm)
Height Packed: 52.37"(133.0198 cm)
Depth Packed: 23"(58.42 cm)