Peavey Official User Manuals for Car Speakers: SP 5BX Details and Specifications

SPECIFICATIONS SP™ 5BX

Description

The SP 5BX is a two-way speaker system comprised of a high output 15” Scorpion® Plus HO woofer with a Kevlar®-impregnated cone and an RX™ 22 compression driver loaded onto a patented Quadratic Throat Waveguide™.

The SP 5BX has a trapezoidal-shaped enclosure, which reduces the buildup of standing waves

inside the enclosure to minimize mid-bass and midrange coloration. The enclosure is constructed of

a hardwood panel coated with Peavey’s heavy-duty HammerHead™ UV stabilized polyurea finish

for increased durability and ruggedness. A full-length, wrap-around perforated steel grille protects the front of the enclosure. A built-in SA-1 stand-mount adapter accommodates speaker stand use.

The low frequencies are supplied by a 15” Scorpion Plus HO woofer with a Kevlar-impregnated cone and a highly linear suspension. The high frequencies are handled by a 2” RX 22 titanium diaphragm compression driver utilizing ferrofluid 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 helps reduce ceiling reflections, ensuring greater clarity and gain before feedback. The RX22 driver features the Radialinear Planar Phase Correction System (U.S. Patent #6,064,745), which provides smooth and extended high frequency response.

Input connection to the system is made via two 1/4” phone jacks and one four-pin twist lock connector in parallel. The internal passive crossover features Sound Guard™

IIItweeter protection circuit and an advanced topology crossover with high-performance components to provide high power handling and reliability.

Sound Guard, Peavey’s proprietary high frequency driver protection

circuitry, provides long- and medium-term driver overload protection without impairing musical transients or dynamics when the system is used full range. 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 69 Hz to 17 kHz.

Despite its compact dimensions, this system can produce very high sound levels and handle 800 watts program power, resulting in clean coverage with high articulation and long-term reliability.

Frequency response

This measurement is useful in determining how accurately a given unit reproduces an input signal. The frequency response of the SP 5BX 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 5BX combine to give a smooth frequency response from 69 Hz to 17 kHz.

Power handling

There are many different approaches to power handling ratings. Peavey rates this loudspeaker system’s power handling using a full-range form of the AES Standard 2-1984. Using audio band 20 Hz to 20 kHz pink noise with peaks of four times the RMS level, this strenuous test signal assures the user that every portion of this system can withstand today’s high technology music.

This rating is contingent upon having a minimum of 3 dB amplifier headroom available.

Harmonic distortion

Second and third harmonic distortions vs. frequency are plotted in figures 3 & 4 for two power levels. Ten percent (10%) of rated input power and either one percent (1%) of rated input power or 1 watt, whichever is greater. Distortion

is read from the graph as the

difference between the fundamental signal (frequency response) and the desired harmonic. As an example, a distortion curve that is down 40 dB from the fundamental is equivalent to 1% distortion.

Mounting

This unit is not designed for overhead suspension. The SA-1 stand-mount adapter may be incorporated, and four large rubber feet are included on the bottom for floor use.