QSC Audio Explore the Frequency Response and Impedance of Portable Speakers

1250 Frequency Response and Impedance / Enclosure Dimensions

		105														30
		100														27
Frequency
		95														24
Response and
		90														21
Impedance		85
(Passive Mode)	dBSPL	80														18		Ohm
		75														15
		70														12
		65														9
		60
		55														6
		50														3
			45		20 Hz		50	100	200	500	1K	2K	5K	10K	20K	0
										Frequency (Hz)
		105
		100
Horizontal		95
Frequency		90
Response	dBSPL	85
(O°, 30°, 60°)		80
		75
		70
		65
		60
		55
		50
			45		50 Hz		100	200	500		1K	2K	5K	10K	20K
										Frequency (Hz)
						1000
Beamwidth vs					(degrees)
Frequency
					Beamwidth
						100										Horizontal
																Vertical
						10
							100		1000			10000		10000
										Frequency (Hz)
				10.0
				9.0
Directivity				8.0
Index and Q
				7.0
			Q	6.0
			(dB),
				5.0													DI
			DI														Q
				4.0
				3.0
				2.0
				1.0
				0.0		100			1000			10000		100000

Frequency (Hz)

Physical Dimensions

All units in inches

Top

Front

Side

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1200 Series Spec Sheet 10/02/01