GML 2032 Mic Preamp / EQ
The GML Model 2032 Microphone Preamplifier / Parametric Equalizer is a single-channel, multi-input device for high-resolution studio and remote applications. Based on the reference-standard Model 8300 Transformerless Microphone Preamplifier and Model 8200 Parametric Equalizer, this flexible 1U processor continues the GML engineering tradition while bringing the utmost in transparency, detail, and musicality to an affordable, compact form factor.
Features:
- All-discrete, Class-A design; no integrated circuits to compromise the audio path
- DC-servo and premium-grade film coupling; no interstage capacitors to add distortion or degrade over time; no tantalum electrolytic, ceramic, or aluminum electrolytic capacitors in the signal path*
- Transformerless; precision electronically balanced inputs
- Designed with GML 9202 (single) and GML 8501 (dual-differential) low-noise, low-distortion, wide dynamic range, wide bandwidth precision discrete opamps
- DC-servo stabilized direct-coupled output
- Multi-input format: MIC or MI (front panel musical instrument)
- Wide gain range (10 dB to 75 dB) available on both inputs
- Precision Gain switch: 65dB range in 5dB steps
- Continuously variable preamplifier Fine gain control, +/-5dB
- Four-band fully parametric equalizer
- Low-frequency and High-frequency Shelf mode capability
- Flexible routing: Single-Channel, Independent, Inline Insert configurations
- High-pass Filter; selectable 40 Hz, flat, 100Hz
- Power status LED
- Quality PCB manufacturing, assembly, and chassis construction
Specifications
FORM FACTOR
- One channel, multi-input, gain, filter, parametric equalizer with insert capability and internal power supply
- Inputs: Mic (balanced, XLR), MI (Musical Instrument; unbalanced, 1/4” TS)
- Gain control: +15dB to +70dB, 5dB steps
- Fine control: -5dB to +5dB, continuously variable
- Phase switch, Phantom power (P48) switch
- Filter– Second-order Butterworth active high-pass filter; 100Hz, flat, 40Hz
- Insert control: split parametric equalizer from preamplifier
- EQ section: four bands, fully parametric, continuously variable controls
- EQ IN switch
- Overload (OL) indicator: peak indication, preamplifier and equalizer
INPUT
- Microphone: 1 kΩ balanced, >80dB CMRR, +17dBu max input before clipping
- Insert In: 20 kΩ balanced bridging, >40dB CMRR, +21dBu max input before clipping
- MI: 1 MΩ unbalanced, +8.5dBu maximum input before clipping
THROUGHPUT
Bandwidth:
- -0.1dB / +0.002dB, <10Hz to >30kHz, worst-case
- -3dB, >300kHz and <<10Hz, typical
- <0.003% Harmonic distortion, 20Hz to 20kHz, typical
- <0.006% SMPTE Intermodulation distortion, typical
- 30V/usec discrete low-noise precision operational amplifiers, GML 9202
Noise:
- -80dBu broadband, EQ engaged, typical
- -112dBu EIN, MI input
- -120dBu EIN, Microphone input (Rs = 150 Ω, 30kHz BW), worst-case
- -80dB crosstalk, 20Hz to 20kHz, worst case
OUTPUT
- +27.0 dBu clipping< 3 mV output offset, stabilized by DC servo correction, direct coupled
- Wired pin 2 “hot”, 3-wire unbalanced
OTHER
- Internal linear power supply, 110V/220V switch, 50/60Hz; +/-28 VDC, +/-18 VDC, +48VDC
- Approx. power consumption: 28W; 500mA/250V slo-blo fuse installed (110V operation)
- Separate Ground and Chassis connections at rear
- 19″ W x 1.75″ H x 10″ D rack mount chassis, black anodized aluminum, silver legend
- Weight: 11 lbs., approximate; shipping weight may vary
*GML reserves the right to make changes to these specifications as it deems necessary. Individual unit performance may vary due to environmental influences, manufacturing variations, and component tolerances. Please refer to full Specifications sheet (included in the Model 2032 Owner’s Manual) for details