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BEHRINGER 1273 Microphone Preamplifier
- ชนิด: DSP โปรเซสเซอร์
- Two-channel mic preamp: with a 3-band equaliser on each channel
- Class A circuitry: the preamp uses all discrete Class A circuitry
- Midas transformers: custom-built Midas input and output transformers
- Stepped gain: -20 dB to 80 dB in 5 dB steps on an electronically controlled resistor-stepped switch
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Give the vocal a transformer path on the way in.
The take is good, but the vocal sits behind the track. Record it through Class A, all discrete circuitry. Custom-built Midas transformers sit at the input and the output, on two channels.
Colour chosen at the input
GAIN runs from -20 dB to 80 dB in 5 dB steps. Push it to draw rich harmonic distortion from the source, then bring the output back with LEVEL. TONE switches the mic input impedance between 1200 Ω and 300 Ω. At 300 the sound becomes a little warmer, which may suit ribbon mics.
Three bands, picked by ear
The low shelf works at 35 Hz to 220 Hz, and the high shelf at 10 kHz to 16 kHz. Between them, the mid bell covers 360 Hz to 7.2 kHz. Each band has ±15 dB of gain. The HI-PASS filter clears rumble at 50, 80, 160 or 300 Hz. It stays active even with the EQ switched out.
Space for your compressor
The insert point sits after the gain and before the EQ, ready for a compressor while tracking. Bass and guitar plug into the 600 kΩ instrument input. With TONE engaged there, the input transformer adds a gentle warmth to a thin tone.
Features
- Two-channel mic preamp: with a 3-band equaliser on each channel
- Class A circuitry: the preamp uses all discrete Class A circuitry
- Midas transformers: custom-built Midas input and output transformers
- Stepped gain: -20 dB to 80 dB in 5 dB steps on an electronically controlled resistor-stepped switch
- Harmonic drive: overdrive the gain for rich harmonic distortion, then bring the output down with LEVEL
- Tone switch: sets mic input impedance to 1200 Ω or 300 Ω; 300 Ω sounds a little warmer and may suit ribbon mics better
- Inductor-based EQ: switchable equalisers with a passive third-order high-pass filter
- Low and high bands: low band from 35 Hz to 220 Hz and high band from 10 kHz to 16 kHz, each with ±15 dB gain
- Mid band: ±15 dB of gain at 360 Hz to 7.2 kHz, in 7 steps
- High-pass filter: off, 50, 80, 160 or 300 Hz, still active when the EQ is switched out
- Insert point: post gain and pre-EQ, ready for a compressor while tracking
- Mic, line and instrument inputs: combo mic/line input plus a 600 kΩ instrument input that runs through the input transformer
- Per-channel switches: phase, tone, insert, line, instrument and phantom power switches on each channel
- Transformer-balanced I/O: inputs and outputs on XLR/combo connectors
- LED level meter: 7-segment LED meter on each channel shows output level from -30 dB to 24 dB
- 2U rack chassis: with an auto-ranging universal switch-mode power supply
| Mic input type, rear | 2 x XLR, transformer balanced rear |
|---|---|
| Mic input impedance | 300 Ω / 1200 Ω, balanced |
| Mic max. input level | +19 dBu |
| Mic gain range | -20 to 80 dB |
| Mic EIN, 80 dB gain, 22 Hz to 22 kHz | -125 dBu Unweighted |
| Mic CMRR, 60 dB gain | > 90 dB |
| Line input type, front | 2 x 1/4" TRS in combi socket, transformer balanced front |
| Line input type, rear | 2 x 1/4" TRS, transformer balanced rear |
| Line input impedance | 10 kΩ, balanced |
| Line max. input level | +30 dBu (attenuated -34 dB) |
| Line gain range | -20 to 80 dB |
| Line CMRR, 0 dB gain | > 80 dB |
| Instrument input type | 2 x 1/4" TRS, front, hi-Z via transformer |
| Instrument input impedance | 600 kΩ, unbalanced |
| Instrument max. input level | +30 dBu (attenuated -20 dB) |
| Instrument gain range | -20 to 80 dB |
| Insert return | 2 x 1/4" TS |
| Mic input type, front | 2 x XLR, transformer balanced front |
| Output type | 2 x XLR, 1/4" TRS, transformer balanced |
| Output impedance | < 80 Ω balanced |
| Max. output level | +28 dBu |
| Insert send | 2 x 1/4" TS |
| Frequency response (microphone) | 20 Hz to 20 kHz, ±0.5 dB |
| Frequency response (line and instrument) | 20 Hz to 20 kHz, ±1 dB |
| Distortion (THD+N), 50 Hz to 20 kHz | <0.07% 50 Hz to 20 kHz, +4 dBu |
| Noise | < -83 dBu (20 Hz to 20 kHz unweighted) |
| Dynamic range | > 102 dB typical (20 Hz to 20 kHz unweighted) |
| Distortion (THD+N), 1 kHz | <0.01% @ 1 kHz, +4 dBu |
| Circuit | Class-A amplifiers, inductor based EQ |
| Hi pass filter | 50 / 80 / 160 / 300 Hz (18 dB/octave) |
| Low-band frequency range | 35 / 60 / 110 / 220 Hz |
| Low-band boost / cut | ±15 dB |
| Mid-band frequency range | 360 / 700 / 1600 / 3200 / 4800 / 7200 Hz |
| Mid-band boost / cut | ±15 dB |
| High-band frequency range | 10 / 12 / 16 kHz |
| High-band boost / cut | ±15 dB |
| Power switch | On/off power switch |
| Mains voltage | 100 to 240 V~, 50/60 Hz |
| Power consumption | 22 W max |
| Fuse | T 1A H 250 V |
| Mains connection | Standard IEC receptacle |
| Standard operating temperature range | 5° C to 45° C (41° F to 113° F) |
| Ref. Code | TCR-QS5ZXD |
คู่มือ (Manual)
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