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GML 8304 Four Channel Microphone Preamp
GML Microphone Preamplifiers are world renowned for their life-like realism, high resolving power, and reference-standard transparency. Their all-discrete, bipolar transistor circuit topologies are completely transformerless with no FET's, IC's, or electrolytic capacitors in the signal path. Even the outputs are direct-coupled; time-proven active servos remove DC without adding any artificial color. 15dB to 70dB of Gain is front panel selectable in accurate 5dB steps. A +24dBv CLIP indicator warns of any impending overloads and switchable phantom powering is built in. Both the 8302 two-channel mic preamp as well as the 8304 four-channel version fit compactly in only 1U of rack space, and use one external GML 8355 power supply is now included with this product.
Power supply now included!
Product Name | GML 8304 4-Channel Microphone Preamp with 8355 Power Supply |
---|---|
Brand | GML |
Condition | New |
UPC | 880933000557 |
Shipping Option | Free Shipping to the Continental U.S. |
- INPUT - 1kΩ balanced XLR, 80 dB common mode rejection at 100Hz & 10kHz, +12.4 dBv maximum input before clipping (minimum gain setting)
- THROUGHOUT - 50 volts/microsecond minimum, symmetrical at 30 dB gain, Distortion: Maximum SMPTE intermodulation at +20 dBv output level; 0.0015% at 30 dB gain /0.007% at 70 dB gain, Effective input noise: < -126.5 dBv with 150 ohm source / < -129.5 dBv with 0 ohm source (measurements at 400Hz & 30 KHz, 12 dB/octave high & low-pass filters (ref: 0.775v), Frequency response: +0, -0.2db @ 10 Hz & 50 KHz / +0, -0.3db @ 1.7 Hz & 260 KHz, Phase shift: 22 degrees @ 10 Hz & 260 KHz
- FORM FACTOR - Number of channels: 4 maximum (2 or 4 on order), Clip indicator: +24 dBv ±0.5 dB, Gain:10 to 65dB in 5db (±.25dB) steps, Front Panel Indicators: 4 red clip LED’s, 1 green power LED, Phantom: 48 volt switchable, 40 ma. available. Currently supplied with standard 6.81 KΩ, 1% resistors.
- OUTPUT - +27.4 dBv at clip, unbalanced XLR (pin 2 hot), 3 mv output offset max, stabilized by D.C. servo correction
- OTHER - external power supply: +28 volts, separate ground and chassis connections at rear, Enclosure: 1.75"X 19" rack mounting, 10" deep. Satin grain, black anodized finish
GML 8304 4-Channel Microphone Preamp with 8355 Power Supply
GML 8304 Four Channel Microphone Preamp
GML Microphone Preamplifiers are world renowned for their life-like realism, high resolving power, and reference-standard transparency. Their all-discrete, bipolar transistor circuit topologies are completely transformerless with no FET's, IC's, or electrolytic capacitors in the signal path. Even the outputs are direct-coupled; time-proven active servos remove DC without adding any artificial color. 15dB to 70dB of Gain is front panel selectable in accurate 5dB steps. A +24dBv CLIP indicator warns of any impending overloads and switchable phantom powering is built in. Both the 8302 two-channel mic preamp as well as the 8304 four-channel version fit compactly in only 1U of rack space, and use one external GML 8355 power supply is now included with this product.
Power supply now included!
Product Name | GML 8304 4-Channel Microphone Preamp with 8355 Power Supply |
---|---|
Brand | GML |
Condition | New |
UPC | 880933000557 |
Shipping Option | Free Shipping to the Continental U.S. |
- INPUT - 1kΩ balanced XLR, 80 dB common mode rejection at 100Hz & 10kHz, +12.4 dBv maximum input before clipping (minimum gain setting)
- THROUGHOUT - 50 volts/microsecond minimum, symmetrical at 30 dB gain, Distortion: Maximum SMPTE intermodulation at +20 dBv output level; 0.0015% at 30 dB gain /0.007% at 70 dB gain, Effective input noise: < -126.5 dBv with 150 ohm source / < -129.5 dBv with 0 ohm source (measurements at 400Hz & 30 KHz, 12 dB/octave high & low-pass filters (ref: 0.775v), Frequency response: +0, -0.2db @ 10 Hz & 50 KHz / +0, -0.3db @ 1.7 Hz & 260 KHz, Phase shift: 22 degrees @ 10 Hz & 260 KHz
- FORM FACTOR - Number of channels: 4 maximum (2 or 4 on order), Clip indicator: +24 dBv ±0.5 dB, Gain:10 to 65dB in 5db (±.25dB) steps, Front Panel Indicators: 4 red clip LED’s, 1 green power LED, Phantom: 48 volt switchable, 40 ma. available. Currently supplied with standard 6.81 KΩ, 1% resistors.
- OUTPUT - +27.4 dBv at clip, unbalanced XLR (pin 2 hot), 3 mv output offset max, stabilized by D.C. servo correction
- OTHER - external power supply: +28 volts, separate ground and chassis connections at rear, Enclosure: 1.75"X 19" rack mounting, 10" deep. Satin grain, black anodized finish
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