(Last updated 07/20/2010)
(See Nick Casares' review of Mic2496 V2 in the May 2009 issue of
The original Mic2496 was the world's most popular portable, battery
powered 24-bit/96 kiloSamples-per-second two-channel mic pre-amp/A-to-D
The new V2 adds zero-latency headphone monitoring, more low-noise
gain (up to 60 dB), a true 10 mA of 48V phantom power per channel, more
level indicator LEDs, and selection of all sample rates (32 to 192 KS/s)
from the external sample rate switches (rather than internal jumpers).
All of the toggle switches have been replaced by low profile slide
switches. It sounds wonderful!
V2 is the first battery-powered, portable mic pre-amp/ADC in the
world to offer all of these features!
Core Sound is proud to introduce its new Mic2496 V2, an improved version of the
world's most popular handheld, battery-powered, 24-bit, 192
kiloSample-per-second dual microphone pre-amplifier and
analog-to-digital converter. Mic2496 V2 is part of Core Sound's PDAudio® portable,
high-resolution PDA-based digital audio recorder system, and it's priced
V2 can also be used as a fine digital front end for your laptop
computer and any other other digital recorder that has a S/PDIF input.
These include the Apple MacBook Pro (15- and 17-inch models), Sony
PCM-D50, Marantz PMD661, Tascam DR-680, the M-Audio MicroTrack II, Sound
Devices 702/722/744, Tascam HD-P2, Nomad Jukebox 3, iRiver iHP-120 and
Sony and Tascam Portable DAT decks (e.g., TCD-D100, PCM-M1, TCD-D8,
TCD-D7, TCD-D3, DA-P1, DA-20). All of these recorders have only 16-bits
(or less) of dynamic range when using their internal Mic/Line stages and
ADCs. They also have a much higher noise floor than V2.
V2 -- A Dual Mic Pre-Amp/A-to-D Convertor
V2 runs on a single 9 volt alkaline battery or rechargeable Li-Po
batteries, provides low-noise 48 Volt phantom power to all condensor
microphones (switchable), and the appropriate power for Core Sound's
High End Binaural microphone set using DPA's marvelous 4060 and 4061
miniature microphone capsules. (It does not provide the correct power
for our Core Sound Binaural microphone set so you'll still have to use
the CSB's battery box.)
It also provides concentric level controls, six LEDs per channel
that display input levels (activity, -20, -10, -6, -3 and "clip"), a
switch to turn off the level indicator LEDs to save battery power,
externally switch-selectable sample rates of 32, 44.1, 48, 64, 88.2, 96,
128, 176.4 and 192 KS/s, a battery "low voltage" indicator, a "Phantom
Power On" indicator, and both coaxial (via RCA jack) and optical (via
Toslink) S/PDIF outputs. It has a recessed Power On/Off slide switch,
and a DC Power jack (9 to 14 VDC at 400 mA) to accept power from an AC
adapter or external battery packs.
For microphone input, V2 has a 5-pin Mini-XLR jack that accepts a
variety of breakout cables including one that accepts two standard
balanced XLR-M plugs, another that accepts a stereo unbalanced 1/8-inch
(3.5mm) mini-phone plug, and another that accepts two of DPA's standard
MicroDot plugs. The breakout cables are six-inches (15 cm) long. Other
custom cables can be ordered.
V2 has an unusally flat and extended frequency response (from 6 Hz to
more than 80 KHz when sampling at 192 KS/s), and very low noise. This
makes it especially interesting to science researchers working on sonar,
marine mammal communication, and other ultrasound applications. Its
extended low frequency response extends well below audibility, making it
useful for ethological and zoological field studies, seismic
measurements and other infrasonic applications.
V2 has two slide switches that select sample rate. One switch
selects 32, 44.1 and 48 KS/s. The other switch selects the sample rate
multiplier: "times 1", "times 2" or "times 4". For example, when the
first switch is in its "44.1" (middle) position, the second switch selects
between 44.1, 88.2 and 176.4 KS/s.
V2's gain is controlled by a three-position slide switch that selects
gain ranges. In the left position it selects the dual-concentric
rotating pots, for a gain range of between 4 and 47 dB. In the center
position it selects a fixed gain of 53 dB, and in the right position it
selects a fixed gain of 60 dB.
At minimum gain, V2 can accept most Line-level sources (up to 1.6
Volts peak-to-peak) without requiring attenuators ("pads") to prevent
mic pre-amp overload distortion (aka "brickwalling"). In most recording
situations it's really hard to overload V2's inputs.
V2 is housed in a very rugged, black aluminum case. It's 5-1/8 inches
long, 3 inches wide and 1-1/2 inches high. It's sized to neatly fit
behind almost any PocketPC PDA (e.g., HP iPAQ).
Smart Power Management Features
We designed some smart features into V2 to extend its operating time
when powering from batteries.
When monitoring on headphones, if you turn the level control to
minimum, the headphone circuit is powered down; when you turn the level
up, the power is instantly restored. There's also a switch that lets
you turn the headphone monitoring function on and off.
V2 has six LEDs for each channel that show signal level. To extend
battery life, we've provided a switch that turns off all of the LEDs
except the red ones that display clipping.
July 22, 2009: Firmware Update for Sony PCM-D50
Sony's PCM-D50 audio recorder is the only digital audio recorder we
know that doesn't determine an S/PDIF data stream's sample rate from the
data stream's clock. Instead it examines the S/PDIF header data. If
the data stream's clock and the header data are different, it gets the
sample rate wrong. The result is that it will record a 96 Kilosample
per second recording and label it in the WAV file header as 48 KS/s.
When you play it back, it plays back twice as fast
Sony doesn't acknowledge the problem and will not fix it. We've
updated Mic2496 V2's firmware to give the Sony what it wants. Now it
can't make the mistake.
All new V2s will come with the updated firmware. If you want your V2
upgraded, please contact us to arrange to install the update for a small