The PCM 91 offers Lexicon’s highest-quality reverbs in a compact, affordable package with a powerful interface which allows both easy access and a wealth of programming capabilities for the sound designer. All of the features of the acclaimed PCM 90 are included, plus full AES/EBU I/O, Dual Reverb algorithms, and presets with dynamic spatialization effects for 2-channel or surround applications (available for the PCM 90 on a PC card).One of the stunning advances in the PCM 91 is the ability to create incredibly realistic small spaces. For both music and film sound, it is often vital to have the ambiences of a phone booth or very small drum room. In the PCM 91 you can create them with a reality never heard before from any processor other than a Lexicon. Analog Audio Input: XLR and 1/4" balanced (T/R/S) Input Level: -2dBu to +20dBu, balanced; -22dBu to 0dBu, unbalanced Input Impedance: 100kΩ, balanced;50kΩ, unbalanced Analog Audio Output: XLR and 1/4"T/R/S balanced Output Level: +18dBm, balanced;+4dBm, unbalanced Output Impedance: 125Ω, balanced Digital Audio Input: XLR, AES/EBU; Coaxial RCA, S/PDIF Format: AES/EBU, balanced; S/PDIF, unbalanced Sample Rate: 44.1kHz and 48kHz Digital Audio Output: XLR, AES/EBU; Coaxial RCA, S/PDIF Format: AES/EBU, balanced; S/PDIF, unbalanced Sample Rate: 44.1kHz and 48kHz Conversion: 24-bit A/D;24-bit D/A Internal Audio DSP: 24-bit (PCM 81);20-bit (PCM 91) Frequency Response: 10Hz - 20kHz ±.5dB Crosstalk: -55dB 10Hz to 20kHz THD: 98dB typical, 10Hz - 20kHz A/D:>105dB typical, 10Hz- 20kHz A/A:>96dB typical, 10Hz - 20kHz MIDI Interface: 5-pin DIN connectors for MIDI IN, THRU and OUT Footswitch: 1/4"T/R/S connector for two independent momentary footswitches (system detects normal-open, or normal-closed on power up) Foot Controller: 1/4"T/R/S connector for foot pedal(100Ω-10kΩimpedance) Memory Card Connector: PCMCIA type l cards, 68 pins Standards: PCMCIA 2.0 and JEIDA 4.0 Card Format: Up to 1MB of SRAM (attribute memory not required) Power Requirements: 100 - 240 volts AC;50 - 60Hz;35 watts Automatic switching (3-pin IEC connector) Remote Power In: 2.5 mm 9 volts AC (not included) Dimensions: 19" W x 1.75" H (1U) x 12" D 483 x 45 x 305 mm), rack mount standard Weight: 6.4 lbs.(2.9 kg) Operating Temperature: 32°to 104°F (0°to 40°C) Maximum Humidity: 95% without condensation