Sound Performance Lab Model 2591 manual Frequency Response,FFT Spectrum Analysis, Measurements

Frequency Response,FFT Spectrum Analysis Measurements

Audio Precision	Frequency Response	05/09/05 14:48:13
	2591 MixDream XP

+10

ExpansionInput, FixOutput

+9

+8

+7

+6

+5

+4

+3

+2

d

+1

B

r

-0

A

-1

-2

-3

-4

-5

-6

-7

-8

-9

-10

20

50

100

200

500

1k

2k

5k

10k

20k

50k

100k

200k

Hz

A-A FREQ RESP 20Hz-200kHz.at2c

Audio Precision	FFT Spectrum Analysis	05/09/05 14:41:38
	2591 MixDream XP

	+20				ExpansionInput	Noise Spectrum
	+10
	+0
	-10
	-20
	-30
	-40
	-50
d	-60
B
u	-70
	-80
	-90
	-100
	-110
	-120
	-130
	-140
	-150
	20	50	100	200	500	1k	2k	5k	10k	20k
					Hz
					A-AFFT Noise .at2c

Audio Precision	FFT Spectrum Analysis	05/09/05 14:46:52
	2591 MixDream XP

	+20			ExpansionInput, FixOutput		Input Level:+10dBu
	+10
	+0
	-10
	-20
	-30
	-40
	-50
d	-60
B
u	-70
	-80
	-90
	-100
	-110
	-120
	-130
	-140
	-150
	2k	4k	6k	8k	10k	12k	14k	16k	18k	20k
					Hz
					A-AFFT .at2c

Well, we think this is „linear frequency response“ in the word‘s best possible sense: even at 200kHz the fall-off is below -1dB.

And mind you, typical frequency response measu- rements are related to a -3dB fall-off.

The FFT Spectrum Analysis above shows the spectrum of noise components. We have a very low overall level here, in particular without ugly „spikes“.

The analysis below shows distortion components at an input level of +10dBu. There is no distortion

present above the MixDreamXP‘s outstan- ding, low (THD+N = -103dB) noise level.

MixDream XP 15