At the recent AES show in NYC, Core Sound announced the new Mic2496 Version 2 -- also known as "V2"!

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 converter.

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 All of the toggle switches have been replaced by low profile slide switches.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 under $600.

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, the M-Audio MicroTrack II, Sound Devices 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).

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 ganged 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. The left switch selects 32, 44.1 and 48 KS/s. The right switch selects the sample rate multiplier: "times 1", "times 2" or "times 4". For example, when the left switch is in its "44.1" (middle) position, the right 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.

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