Merging Technologies AKDG8D standard

• Analogue-to-digital converter
• 8 transparent preamps
• Remote and local switching to line Level per channel
• Full remote access for all parameter changes
• Phantom power, phase reverse, low cut and impedance switchable per channel
• Removes the need for DI boxes
• Auto-mute circuit for "no-pop" power cycling

Amplification and conversion

The AKDG8D standard plug-in card offers an AD converter and an extension of eight preamps for the Horus or Hapi. The preamps are remarkably transparent and inspired by the outstanding "Anubis" preamps. These cards set new standards in analogue circuit design and additionally offer a line level after microphone preamp "Direct Out" output.

Line input:

• Frequency response +0/-0.1dB @ fs = 44100 Hz: 5.7 Hz - 20.5 kHz
• Frequency response +0/-1.0dB @ fs = 44100 Hz: 1.8 Hz - 21.0 kHz
• Frequency response +0/-0.1dB @ fs = 96000 Hz: 5.7 Hz - 43.9 kHz
• Frequency response +0/-1.0dB @ fs = 96000 Hz: 1.8 Hz - 45.4 kHz
• Frequency response +0/-0.1dB @ fs = 192000 Hz: 5.7 Hz - 42.1 kHz
• Frequency response +0/-1.0dB @ fs = 192000 Hz: 1.8 Hz - 64.7 kHz
• Frequency response +0/-0.1dB @ fs = 384000 Hz: 5.7 Hz - 40 kHz
• Frequency response +0/-1.0dB @ fs = 384000 Hz: 1.8 Hz - 75 kHz
• Maximum line input for 0 dBFS: +24 dBu
• Input impedance: 10.4 kΩ
• Dynamic range (flat 20 Hz-20 kHz), ref +24 dBu: > 136 dB
• Dynamic range (A-weighted, typ), ref +24 dBu: 138.5 dB
• THD+N Line+A/D (1 kHz) @ -2 dBFS, typ.: -106 dB (0.0005%)/-109 dB (0.00035%)
• THD+N Line+A/D (20 Hz-20 kHz) @ -2 dBFS: < -106 dB
• Crosstalk between the channels at 1 kHz, typ.: -130 dB
• Crosstalk between the channels at 20 Hz - 20 kHz: < -100 dB
• Sensitivity range for 0 dBFS (software-controlled): -42 dBu to +24 dBu
• Gain precision: ±0.2 dB
• Gain step: 0.5 dB
• Common mode rejection at 1 kHz, typ.: 75 dB (up to -20 dBFS)
• Common mode rejection at 20 Hz - 20 kHz: > 65 dB (up to -20 dBFS)
• Group Delay (1FS): 5/fs
• Group Delay (2FS): 5/fs
• Group Delay (4FS): 6/fs

Microphone preamplifier + ADC:

• Mic Pre Max Input (Mic+Pad / Mic / Boost): +24 dBu / +12 dBu / +0 dBu
• Mic Pre Max Input (Pad On; Pad Off): > 3 kΩ; 10.4 kΩ
• Input impedance (Zlo; ZHi): > 3 kΩ; 10.4 kΩ
• Dynamic range (flat 20 Hz-20 kHz): > 134 dB
• Dynamic range (A-weighted, typ): 136 dB
• Gain range (software-controlled): 0 dB to +66 dB
• Gain precision: ±0.2 dB
• Gain stage: 0.5 dB
• THD+N Pre + A/D (20 Hz-20 kHz) @ -2 dBFS: -110 dB (0.00031 %)/-112 dB (0.00025 %)
• Crosstalk between the channels @ 1kHz, typ.: < -125dB
• Crosstalk between the channels at 20Hz - 20 kHz: < -100 dB
• ON @ >40 dB gain (150Ω source impedance, A-weighted, typ): -128 dBu
• Common mode rejection at 1 kHz, typ: 75 dB (up to -20 dBFS)
• Common mode rejection at 20Hz - 20 kHz: > 60 / 65 dB (up to -20 dBFS)
• Phantom power (software switchable per channel): +48 volts
• Phase reverse switch (software switchable per channel): Yes
• Low-pass filter (software-switchable per channel): -12 dB/octave, 80 Hz

Direct Out:

• Max. Direct output level typ.: +24 dBu / +12 dBu / +0 dBu
• Output impedance (differential): < 100 Ω
• THD+N (1 kHz) @ +10dBu: < -111dB (0.00028 %)
• Input connector pinout: DB-25 / AES59 (Tascam Ana.)
• Direct Out Pinout: DB-25 / AES59 (Tascam Ana.)