- Sample rates: 44.1, 48, 88, 96, 176 and 192 kHz from internal clock; external clock range 32kHz to 192kHz.
- Analogue inputs: 12 quarter-inch TRS balanced/unbalanced jack sockets with individually switchable +4dBu/-10dBV sensitivity and 10kΩ impedance.
- Analogue outputs: 12 balanced/unbalanced TRS quarter-inch jacks with individually switchable +4dBu/-10dBV output level.
- Digital I/O: word clock and MIDI in and out.
- Dynamic range: input 113dBA, output 114dBA.
- Frequency response: 20Hz to 20kHz ±0.1dB.
- THD + Noise: <0.002 percent.
The Audiofire 12 has an attractive milled-aluminium front panel with embossed Echo logo; unlike the Audiofire 8 and Layla 3G, the rack ears are integral rather than optional. Each of the 12 inputs and outputs has an identical LED meter with four segments at -36, -24, -12 and -6 dB, which provides just enough information to let you know there's a signal there, that it has low level, good level or is in danger of clipping. To the right of these meters are eight further indicators, which display the current sample rate, a valid 1394 host connection, internal clock, word clock, and the presence of MIDI Time Code.
All 24 sockets for the analogue inputs and outputs are quarter-inch TRS-wired jacks for balanced or unbalanced use, while there are two BNC sockets for word clock, standard five-pin DIN MIDI In and Out, and IEC mains socket for the built-in mains power supply. The two six-pin Firewire ports are for connecting the interface to your PC and daisy-chaining other Firewire peripherals, although no parasitic power is available from these connectors for further devices in the chain. A front-panel on/off switch and power indicator complete this elegant yet understated interface, while the supplied Firewire cable is a generous 4.5 metres, the maximum length for reliable data transfer. A set of rackmount bolts and rubber feet is also provided.