Peavey SP 5 Frequency Response, Harmonic Distortion, Second and third harmonic, Mounting

Frequency Response

This measurement is useful in determining how accurately a given unit reproduces an input signal. The frequency response of the

SP 5 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 5 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 of 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.

Architectural & Engineering

Specifications

The loudspeaker system shall have an operating bandwidth of 69 Hz to 17 kHz. The nominal output level shall be 99.0 dB when measured at a distance of one meter with an input of 1 Watt. The nominal impedance shall be 8.0 ohms. The maximum continuous power

handling shall be 400 Watts, with maximum program power of 800 Watts, peak power input of at least 1,600 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 27.63 inches high by 20.56 inches wide by 16.5 inches deep. The weight shall be 56 lbs. The loudspeaker system shall be a Peavey model SP™5.

3 + 2 Year Limited Warranty NOTE: For details, refer to the warranty statement. Copies of this statement may be obtained by contacting Peavey Electronics Corporation, P.O. Box 2898, Meridian, Mississippi 39301-2898.

	110	Amplitude Response				(1W 1m On-Axis)
Pa)	100
20	90
(re
dB SPL	80
	70
	6020	50	100	200	500	1k	2k	5k	10k	20k
	Figure 1				Frequency (Hz)

Impedance

100

50

30

Z20 () 10

5
3
2
120	50	100	200	500	1k	2k	5k	10k	20k
Figure 2				Frequency (Hz)

Harmonic Distortion : 1% Rated Power

	110
	100
Pa)	90
20	80
(re	70
dB SPL
	60
	50
	4020	50	100	200	500	1k	2k	5k	10k	20k
					Frequency (Hz)			2nd Harmonic
	Figure 3							3rd Harmonic

Harmonic Distortion : 10% Rated Power

	120
	110
Pa)	100
20	90
(re	80
dB SPL
	70
	60
	5020	50	100	200	500	1k	2k	5k	10k	20k
					Frequency (Hz)			2nd Harmonic
	Figure 4							3rd Harmonic