Sound Performance Lab MixDreamXP Model 2591 - Manual (Page 15)

MixDream XP 15
Audio Precision 05/09/05 14:46:52 FFT Spectrum Analysis
2591 MixDream XP
A-A FFT .at2c
-150
+20
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
+10
d
B
u
2k 20k 4k 6k 8k 10k 12k 14k 16k 18k
Hz
Expansion Input, Fix Output Input Level:+10dBu
Audio Precision 05/09/05 14:41:38 FFT Spectrum Analysis
2591 MixDream XP
A-A FFT Noise .at2c
-150
+20
-140
-130
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
+0
+10
d
B
u
20 20k 50 100 200 500 1k 2k 5k 10k
Hz
Expansion Input Noise Spectrum
Audio Precision 05/09/05 14:48:13 Frequency Response
2591 MixDream XP
A-A FREQ RESP 20Hz-200kHz.at2c
-10
+10
-9
-8
-7
-6
-5
-4
-3
-2
-1
-0
+1
+2
+3
+4
+5
+6
+7
+8
+9
d
B
r
A
20 200k 50 100 200 500 1k 2k 5k 10k 20k 50k 100k
Hz
Expansion Input, Fix Output
Frequency Response,FFT Spectrum Analysis
Measurements
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.
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.