Spectra 1964 Model C610
MPN #ModelC610
Compressor/limiter based on the Model 610 Complimiter with completely separate peak-limiting and compression functions
The Spectra 1964 Model C610 Complimiter. True to the original, the C610 still utilized the unchanged and still unmatched 601 Compressor/Limiter circuit, as well as a 101 amplifier for make-up gain. The improvements we've made include XLR and Phoenix I/O, highest quality input/output transformers, selectable input padding, buffered true VU metering, and multi-stage overload indication.
The Model C610 ?COMPLIMITER? is a compressor/limiter system with performance both measurably and audibly discernible as ?beyond the state of the art?. The completely self-contained unit is compatible with the audio equipment and accessories used in professional recording, broadcasting, motion picture and soundreinforcement industries. Because of extremely low noise characteristics of the design, the system has a very low input level threshold of -40 dBu, thus providing the greatest input sensitivity and compatibility with the widest range of system levels available on the professional audio market. Depending on the program content, the Model C610 ?COMPLIMITER? will accept an input signal from -50 dBu to -40 dBu just prior to beginning compression, as well as standard line level input signal.
Control functions are provided on the front panel for input level threshold, continuously variable compression slope (ratio), release time, selectable pad (10 and 20 dB), and output level. Visual LED indicators for peak limiting and system overload are provided, in addition to Vu meter monitoring.
Specifications
Input Impedance: 600 Ohms
Output Impedance: 2.5k Ohms
Input Pad: Position 1: No Pad, Position 2: +4 dBu nominal input, Position 3: +22 dBu nominal input
Maximum Gain: 56dB
Threshold attack level: -40 dBm
Maximum Output: +18dBu
THD: Less than .01% @ 30Hz-20KHz, at +16 dBm, up to 30dB compression, dependent on release setting
Signal/Noise: Better than 80dB below +4dBm output, with -40 dBm input, 20Hz to 20kHz
Frequency Response: +/- 0.1dB 20Hz-40KHz
Compression/Limiting Ratio: Continuously variable from 1.1:1 to 100:1
Attack time: 100 nanoseconds to 1.2 milliseconds, automatically variable.
Release Time: Continuously variable from 50 milliseconds to more than 10 seconds
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