GML 8304 Series II Microphone Preamplifier
Microphone Preamplifier
PreampPrice not published
Specifications
- Type
- Preamp
- Description
- Microphone Preamplifier
- Topology
- discrete, transformerless (all-discrete bipolar transistor circuit; no FETs, ICs, or electrolytic capacitors in the signal path; direct-coupled outputs with active DC servos)
- Signal path
- Analog
- Channels
- 4
- Channel format
- 4-channel mono
- Form factor
- rack
- Rack units
- 1
- Powered
- external PSU required (GML 8355 or 2555, sold separately)
- Frequency response
- +0/-0.2dB at 10Hz & 50kHz; +0/-0.3dB at 1.7Hz & 260kHz
- Impedance (Ω)
- 1000 (input, balanced)
- Country of manufacture
- USA
Details
Controls: Front-panel gain selector per channel, 10dB to 65dB in 5dB steps; front-panel P48 phantom power switch per channel; phase reverse switch; clip indicator (+24dBv) per channel; power LED
I/O: Input: 1kOhm balanced XLR mic input per channel, +12.4dBu max before clipping (min gain); Output: unbalanced XLR (pin 2 hot) per channel, +27.4dBu clipping; external +/-28V PSU via 5-pin XLR (GML 8355/2555, sold separately)
Notable use: 4-channel version of GML's reference-standard transformerless mic preamp; used for multi-mic tracking in high-end studios
Notes: Specs sourced from GML's shared 'Model 8300 Microphone Preamplifier' datasheet (massenburg.com/wp-content/uploads/2019/06/190528_8300_Specs.pdf), which covers both the 2-channel 8302 and 4-channel 8304 Series II units; '8300' is not itself a currently sold standalone model. GML does not publish MSRP; Professional Audio Design currently lists this at $5,049 USD -- shown as reference only, price_usd left blank per no-guess rule. Requires separate GML PSU (8355/2555), out of scope as an accessory. country_of_manufacture inferred from GML LLC's Franklin, TN, USA address, not an explicit statement.