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(Last updated 03/24/2008)
- Channels: 2
- Word width: 24-bits
- Sample rates: 32, 44.1, 48, 64, 88.2, 96, 128, 176.4 and 192 KS/s, via external switches
- Level controls: dual concentric for continuously variable gain,
slide switch for fixed 53 and 60 dB
- Gain: 4 to 60 dB (nominal), three switch positions: variable (4 to 47), 53
dB, 60 dB
- Input level for 0 dBFS: 1.87 Vp-p (660 mVRMS)
- Frequency response: 20 Hz to 40 KHz (+/- .2 dB), 30 Hz to 40 KHz
(+/- .1 dB), -3 dB at 6 Hz, 6 Hz to greater than 80 KHz @ 192 KS/s sampling rate
- Noise floor: -140 (Ref: 0 dBFS, 20 Hz to 40 KHz, typical)
- Input impedance: 2 KOhm (nominal)
- Separation: greater than 95 dB @ 1 KHz
- THD: less than .001% (typical)
- Phantom power: switchable P48V (maximum current available: 20 mA
total, 10 mA per channel); 9 Volt (for Core Sound HEB microphone set), or none -- via internal jumpers
- Input: 5-pin mini-XLR jack (mates with Switchcraft TA5F); breakout cables available with two XLR-F, 1/8" stereo mini-jack or two Micro-Dot females (others available as custom orders)
- Outputs: coaxial (RCA jack), optical (Toslink)
- Output data format: S/PDIF
- Output level: S/PDIF standard
- LED Indicators: six level indicator LEDs per channel: Activity
(-30 dB nominal), -20, -10, -6, -3, -0.25 dB; Level LEDs On/Off; battery
voltage status LED (modes for good battery, medium battery, low battery, replace now);
P48V Phantom Power On
- Power:
- Internal: 7.4 Volt protected Lithium-Polymer pack using
two protected 15400-series AA-sized rechargeable
batteries (user replaceable), or 9 Volt alkaline "transistor radio" battery (Type 1604)
- External: 9 to 14 Volts DC @ 180 mA minimum (400 mA recommended) via
5.0/2.1 mm DC power jack (center pin positive)
Operating time: more than 5 hours (typical, P48V off) using LiPO
pack, 2 hours using 9 Volt alkaline battery
- Current
consumption: 110mA (P48V off), 145mA (P48V on, typical)
- Dimensions: 5-1/8" L x 3" W x 1-1/2" H
- Weight: 9.75 ounces
(278 grams)
Here's a plot that shows the noise performance of the Mic2496 with a
1.0 KHz signal (65 mVRMS) at its input, sampled at 24-bits/48 KiloSamples per
second, with minimum (+4 dB) analog gain (FFT size: 32K):
The noise floor in this graph is typically -138 dB, more than 115 dB
below the signal -- very fine performance for a low-power portable, and is near the limit of the
Audio Precision measurement instrument!
(The little bump at 60 Hz is a result of these tests being run with
the V2 circuit board out of its case. Normally, that bump would not be there.)
Here is a frequency response plot with a very expanded vertical axis
scale for the two mic inputs at 24-bit/48 KS/s, swept from 20 Hz to 20 KHz at 65 mV input level:
The frequency response is flat to within a tenth of a dB from 20 Hz to
above 20 KHz. Again, this is very fine performance!
(In this plot, the traces for the two channels were separated by a tenth of dB in
gain so that we could see them both.)
And here is a plot showing Crosstalk with the stimulus signal at -3
dBFS:
Crosstalk is more than than 95 dB down at 1 KHz, and typically more than 100 dB
down.
Here is a plot that shows total harmonic distortion plus noise
(THD+N). It shows a level of -102 or better, again excellent.
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"Core Sound Microphones" is a trademark of Core Sound, LLC
"Core Sound" is a trademark of Core Sound, LLC
"PDAudio", "TetraMic", "HeadLine", "2Phant" and 4Mic are trademarks of Core
Sound, LLC
Thanks to HK Audio for use of their open-air concert photo. Mossman photo ©2004 OceanBridge Communcations.
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