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For the Alesis HD24 with EC-2 96 kHz Sample Rate Upgrade A/D and
D/A Converter Boards:
AUDIO INPUT
Input Connectors:
Nominal Input Level:
Maximum Input Level:
Input impedance:
A/D converter:
Analog filter:
Latency (analog in to digital out):
AUDIO OUTPUT
Output Connectors:
Nominal Output Level:
Maximum Output Level:
Output impedance:
D/A converter:
Analog filter:
Latency (digital in to analog out):
AUDIO PERFORMANCE
Signal to Noise Ratio:
THD+N:
Frequency Response:
Throughput delay (analog in to analog out):
Sampling rates:
Channel to Channel Gain Match
All measurements done over a 22 Hz - 22 kHz range with 1 kHz sine wave at +18dBu (-1dBFS) input unless
otherwise specified. Impedances are measured at 1 kHz.
© 2002 Alesis. Specifications Subject To Change Without Notice. All rights reserved. Reproduction in whole or in part is prohibited.
7-51-0107-A 6/2002
EC-2 Manual
24 balanced 1/4" TRS jacks
+4 dBu (1.23 V
) = -15 dBFS
RMS
+19 dBu (6.9 V
) = -0 dBFS
RMS
10 kΩ
AKM 5393
nd
2
-order Butterworth filter w. 96 kHz corner frequency
Approximately 45 samples (<1 ms. @ 48 kHz)
24 balanced 1/4" TRS jacks
+4 dBu (1.23 V
) = -15 dBFS
RMS
-2 dBu when connected to unbalanced circuit
+19 dBu (6.9 V
) = -0 dBFS
RMS
+13 dBu when connected to unbalanced circuit
220 Ω
AKM 4393
nd
2
-order Butterworth filter w. 96 kHz corner frequency
Approximately 32 samples (<0.7 ms. @ 48 kHz)
112 dB A-Weighted, Analog In to Analog Out
≤ 0.002%
22-44 kHz ±0.50 dB
Approximately 77 samples (0.8 milliseconds @ 96 kHz, 1.6
milliseconds @ 48 kHz)
44.1, 48, 88.2, and 96 kHz (each variable ±12%)
±0.50 dB
Specifications
A-13
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