Focusrite TwinTrak Pro Dual Class A Studio Microphone Preamps

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Product Specifiations Mic Input Response • Gain range = 0dB to 60dB continuously variable • Input impedance = 50 Ohm to 3k3 Ohmcontinuously variable • EIN = 128dB measured at 60dB of gain with 150 Ohm terminating impedance and 20Hz/22kHz bandpass filter • THD at minimum gain (0dB) = 0.0004% measured with +16dBu input signal and with a 20Hz/22kHz bandpass filter • THD at maximum gain (60dB) = 0.003% measured with a ?36dBu input signal and with a 20Hz/22kHz bandpass filter • THD at maximum input level (26.5dBu) = 0.005% measured with a 20Hz/22kHz bandpass filter • Frequency response at minimum gain (0dB) = flat at 10Hz and ?2dB down at 200kHz • Frequency response at maximum gain (60dB) = ?2dB down at 10Hz and 200kHz • CMRR at full gain (60dB) = 80dB Line Input Response • Gain range = -10dB to +10dB continuously variable • Input impedance = 10kOhm from 10Hz to 200kHz • Noise at main output with gain set to 0dB = -94dBu measured with a 20Hz/22kHz bandpass filter • Noise at 10dBV output with gain at 0dB = -100dBu measured with a 20Hz/22kHz bandpass filter • Signal to noise ratio relative to max headroom (27dBu) = 121dB • Signal to noise ratio relative to 0dBfs (+22dBu) = 116dB • THD at unity gain (0dB) = 0.0006% measured with 0dBfs (+22dBu) input signal and with a 20Hz/22kHz bandpass filter • Frequency response at unity gain (0dB) = 0.1dB down at 10Hz and ?3dB down at 200kHz Instrument Input Response • Gain range (High Gain switch out) = 0dB to 20dB continuously variable • Gain range (High Gain switch in) = 20dB to 40dB continuously variable • Input Impedance = > 1MOhm • Noise at minimum gain (0dB) = -90dBu measured with a 20Hz/22kHz bandpass filter • Noise at maximum gain (40dB) = -78dBu measured with a 20Hz/22kHz bandpass filter • THD at minimum gain (0dB) = 0.006% measured with ?10dBu input signal and with a 20Hz/22kHz bandpass filter • Frequency response at unity gain (0dB) = 0.5dB down at 10Hz and ?1dB down at 200kHz • Frequency response at maximum gain (40dB) = 6dB down at 10Hz and ?1dB down at 200kHz Input Meter • 6 LED peak reading meter is calibrated relative to 0dBfs where 0dBfs = +22dBu (the maximum level which can be correctly converted by the optional internal A/D converter before overload occurs). The meter calibration points are as follows: Meter panel calibration value: Equivalent dBu value • 0dBFS: +22dBu (the maximum level the ADC can convert before digital distortion occurs) • -6dBFS: +16dBu • -12dBFS: +10dBu • -18dBFS: +4dBu (the normal signal level in an analogue system to allow headroom for additional processing such as EQ) • -24dBFS: -2dBu • -42dBFS: -20dBu Channel Insert • Unbalanced input and output on balanced (TRS) socket as follows: Tip = Send (Output) Ring = Return (Input) • Signal level equivalent to ?6dB below normal operating level. High Pass Filter • Roll off = 12dB per octave 2-pole filter • Cut off frequency: -3dB at 120Hz -6dB at 85Hz -12dB at 56Hz Optical Compressor • Threshold hold range = -12dBFS (10 dBu) to ?42dBFS (-20dBu) • Compressor ratio (Hard Ratio switch out) = 2.5:1 • Compressor ratio (Hard Ratio switch in) = 6:1 • Attack time (Slow Attack switch out) = 0.5ms. • Attack time (Slow Attack switch in) = 5ms. • Release time = 100ms to 1s and then auto release mode when the release knob is turned fully clockwise. Auto release creates a release time dependent upon the average level of the incoming signal • Noise = -94dBu measured with a 20Hz/22kHz bandpass filter • Makeup gain = 0 to +21 dB Compressor Sidechain Insert • Can be used to input an independent signal to trigger compression or to allow the sidechain audio to be sent in and out of the unit via an external processor, such as an EQ for frequency conscious compression and de-essing of vocals • Connector is an unbalanced input and output on balanced (TRS) socket as follows:- Tip = Send (Output) Ring = Return (Input) • Signal level equivalent to ?6 dB below normal operating level Mid Scoop EQ • EQ shape = Peak • Centre frequency = Variable between 120Hz and 2kHz • Cut (Deep switch out) = -6dB • Cut (Deep switch in) = -12dB • Q (Deep switch out) = 1.5 • Q (Deep switch in) = 3 FX Send • Unbalanced output, signal level equivalent to ?6dB below normal operating level • Noise = -94dBu measured with a 20Hz/22kHz bandpass filter • Maximum output signal level = +20dBu FX Return • Balanced input • Operating level = +4dBu Headphones Mix • Unbalanced output, signal level equivalent to ?6dB below normal operating level • Noise = -94dBu measured with a 20Hz/22kHz bandpass filter • Maximum output signal level = +20dBu Monitor Input • Balanced input • Operating level = +4dBu Monitor Output • Balanced output • Operating level = +4dBu • Noise = -98dBu measured with a 20Hz/22kHz bandpass filter and monitor level knob at maximum output level (fully clockwise) • Maximum output signal level = +26dBu DAC Performance • Playback sample frequency = 32kHz to 192kHz. • Maximum bit depth = 24-bit • Maximum analogue output level = +21dBu. • Dynamic Range = 111dB measured with A weighted filter. • Wordclock BNC connector outputs a regenerated wordclock at the sample frequency contained within the SPDIF signal connected to the RCA connector Output Meter • Calibrated for 0dBFS = +22dBu and indicates the level after the output fader being sent to both the internal AD converter and the TwinTrak Pro XLR output • O/L LED is lit when any section of the unit (including the headphone output) reaches a level greater than 0dBFS (O/L: LED triggered at +22.4dBu) Weight • 5kg • 11Ibs Dimensions • 484mm (W) x 85mm (H) x 180mm (D) • 19" (W) x 3.5" (H) x 9.3" (D)

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