User manual CREST AUDIO ST2 DATASHEET

[. . . ] Mic SmarTubeTM Preamp SERIES Features · Two separate full channel strips in a single rack-space unit · Front panel mic/line jacks · Separate insert send and return jacks · Solid-state, tube-sound processor (SmarTubeTM) · Expandability ­ daisy-chaining of multiple units · Superior coating and finishing technology · Affordability · Multicolor 10-segment LED meters · Full parametric EQ (low-mid and high-mid) · Low and high shelving controls · 24dB/oct LCF (low cut filter) · "Sizzle" control · Balanced and unbalanced I/O Description The ST2 is a two-channel, single-rack-space voice processor/channel strip. Each of the two channels consists of four functional sections: microphone and line preamplifier, 4band parametric equalizer, output level/pan/meter/sum, and SmarTube tube-sound processor. A variety of inputs, outputs and insertion points allow each of these sections to be used separately or together. [. . . ] In mono position the channel 1 signal is sent only to the A bus, bypassing the Pan pot. In stereo position the channel 2 signal is panned between the A and B bus. In Mono position the channel 2 signal is sent only to the B bus, bypassing the pan pot. unbalanced (0dBu1/4") and balanced (+4dBu-XLR) outputs are provided on each of the A and B summing buses. A pair of additional, balanced (+4dBu-1/4") I/Os enable the expansion capabilities of the ST2. Several units can be daisy-chained, each next becoming a master for the preceding ones. The ST2 has a built-in power supply and the line connection is through an IEC connector on the back panel. A master power switch with on/off LED indicator is located on the right side of the front panel. Applications · Broadcasting · Installations · Live sound · Recording · Anywhere a high quality mic preamp is needed Specifications ST2TM Dual Channel SmarTubeTM Mic Preamp Gain: Mic: Line: Level: Equalization: Low Shelf: \Boost/Cut: +/-15dB, Frequency: Boost/Cut: +/-15dB, Frequency: Boost/Cut: +/-15dB, Frequency: Boost/Cut: +/-15dB, Frequency: 80Hz 100Hz to 3, 000Hz, Bandwidth: 500Hz to 15, 000Hz, Bandwidth: 12, 500Hz 2 to 1/5 octaves 2 to 1/5 octaves 0dB to +60dB (low Z) OFF to +12dB (high Z) OFF to +6dB Low-Mid Parametric: High-Mid Parametric: High Shelf: Low Cut Filter (Mic input only): THD: Frequency Response: Hum & Noise: Frequency: 75Hz, Slope: 24dB/octave <0. 005%@1kHz (22Hz ­ 80kHz BW) +0dB/-1dB, 20Hz ­ 20kHz (Mic @ max gain, EQ flat) (22Hz ­ 22kHz BW) EIN (Mic 150 Ohm): -129dBu Direct Output: -97dB, all controls OFF, -86dB, nominal settings, gains minimum LED Indicators: Switch closure indicators, 10-segment multicolor LED ladder indicates output level (0dB = 0dBu unbalanced outputs and =+4dBu @ XLR balanced outputs) Phantom Power: Power Requirements: Dimensions (H x W x D): +48V (Microphone XLR Inputs only) Dom: 120VAC 60 Hz 15W, Exp: 230VAC 50/60 Hz 15W 1. 75" x 19" x 10. 5" (4. 44 cm x 48. 26 cm x 26. 7 cm) Weight: 8. 2 lbs. (3. 7 kg) Architects' & Engineers' Specifications: Each of the two input channels 1 and 2 has an XLR low impedance (2. 2k Ohm) microphone and a high impedance (200k Ohm) 1/4" Line/Instrument(DI) inputs with jacks conveniently located on the front panel and duplicated on the rear panel. Both inputs have separate gain controls with wide gain range (Microphone: 0-60dB and Line: OFF to +10 dB). The mic input has a ­20 dB pad switch; a phase-reverse (polarity) switch; a +48V Phantom power switch with LED; and a switchable, fourth-order high-pass filter with 24 dB/oct slop and 75 Hz corner frequency. An insert unbalanced I/O with separate 1/4" send and return jacks is provided on the back panel. Equalization consists of a shelving low and high section and two fully adjustable paramet- ric filters. The low and high shelving is a Baxandall type EQ with 80 Hz and 12 kHz corner frequencies. The low-mid parametric section is a symmetrical, bell-shaped type and provides a +/-15 dB boost/cut within the frequency range 100 Hz ~ 3 kHz and bandwidth range 2 ~ 1/5 octaves. The high-mid EQ sections has the identical characteristics with the exception of the frequency range, which in this case is 500 Hz ~ 15kHz. [. . . ] The output channel signal is monitored via 10-segment, multiple color LED array with ­21 dB to clip (2 dB before clipping) range. A separate, green signal LED indicates the presence of a signal (-20 dBu) through the channel, regardless of the mute switch position. Crest Audio reserves the right to make improvements in manufacturing or design which may affect specifications. 9/4/01 v. 1. 5 *A4500015* Crest Audio Inc. Fair Lawn, NJ 07410 USA TEL: 201. 909. 8700 FAX: 201. 909. 8744 www. crestaudio. com [. . . ]