The Horus has quickly become known as one of the most transparent and sonically impressive ADDA interfaces in the world today. Have a look below at some of the measurements of the system and its signal path to start to find out why this is.

Hapi
HAPI Specifications |
|
Case Material | Powder Coated Steel |
Front Panel Material | Brushed Aluminum |
Weight (excluding redundant PS) | 4.5 kg / 10 lbs |
Dimensions (1U rack mounting) | 483 x 320 x 44 mm |
Voltage (AC) | 90V–260V, 47–63 Hz |
Voltage (DC) | 10-14V |
Power Consumption (Max) | < 30 Watts |
Front Panel TFT size/resolution | OLED (160x128 px) |

Headphone Monitor Jacks | |
Max output Level (Unbalanced) Load = 300 Ohms | +14.5 dBu |
Output Impedance | 75 Ω |
Dynamic Range (A-weighted, typ) | 112 dB |
THD+N (1 kHz) @ -2 dBFS | < -100 dB (0.001 %) |
Gain Range (software controlled) | -∞ dB to +12 dB |
Gain Step/Precision | 1dB / ±0.05 dB |
Connectors |
|
"Sync" Cable (LTC/Video Ref/MIDI) | D-Sub 15Pin |
LTC In & Out (via “Sync” Cable) | Balanced XLR |
Video Reference In (via “Sync” Cable) | BNC |
MTC (I/O via “Sync” Cable) | 5-Pin DIN |
Word Clock Input (Switchable 75 Ω Termination) | BNC, 0.5Vp-p min |
Word Clock Output (Zout = 35 Ω) | BNC, 5Vp-p |
AES-EBU type / pinout | DB-25 female, AES59/Tascam Digital |
ADAT / SPDIF | Optical Toslink |
Heaphone Jack 1&2 | 6.3 mm(1/4”)/3.5mm |
RAVENNA Primary / Secondary (GbE) | RJ45 |


Horus Base Unit
HORUS Specifications |
|
Case Material | Powder Coated Steel |
Front Panel Material | Brushed Aluminum |
Weight (excluding redundant PS) | 6.5 kg/ 14.4 lbs |
Dimensions (2U rack mounting) | 483 x 320 x 89 mm |
Voltage (AC) | 90V–260V, 47–63 Hz |
Power Consumption (Max) | < 60 Watts |
Front Panel TFT size/resolution | 4.3” / 480 x 272 pixels |

Headphone Monitor Jacks | |
Max output Level (Unbalanced) Load = 300 Ohms | +15 dBu |
Output Impedance | 75 Ω |
Dynamic Range (A-weighted, typ) | 109 dB |
THD+N (1 kHz) @ -2 dBFS | < -100 dB (0.001 %) |
Gain Range (software controlled) | -60 dB to +12 dB |
Gain Step/Precision | 1dB / ±0.05 dB |
Connectors |
|
“Sync” Cable (LTC/Video Ref) | D-Sub 15Pin |
LTC In & Out (via “Sync” Cable) | Balanced XLR |
Video Reference In (via “Sync” Cable) | BNC |
Word Clock Input (Switchable 75 Ω Termination) | BNC, 0.5Vp-p min |
Word Clock Output (Zout = 35 Ω) | BNC, 5Vp-p |
AES Connector pinout (DB-25 female) | AES59/Tascam Digital |
MADI types (Coaxial / Optical) | BNC / SC |
Heaphone Jack 1&2 | 6.3 mm(1/4”)/3.5mm |
RAVENNA Primary / Secondary (GbE) | RJ45 |


Check out the System Solution Pages for ideas on how our networked converters can be used with our software.
Or see our Networked Audio Range for ANY Workstation page for usage in 3rd parties DAWs


AKD8D / AKD8DP

Mic Pre-Amp + ADC |
|
Mic Pre Max Input (Pad On / Pad Off) | +24 dBu / +13 dBu |
Input Impedance (Differential, Software Switchable Per Channel) | 1.9 kΩ / 10 kΩ |
Input Impedance with +48V ON (Diff., Soft. Switchable Per Channel) | 1.9 kΩ / 10 kΩ |
Dynamic Range (A-weighted, typ.) , ref +10 dBu | 123.5 dB |
Gain Range (software controlled) | 0 dB to +66 dB |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
THD+N Pre + A/D (20 Hz-20 kHz) @ -2 dBFS (Standard/Premium) | < -110dB (0.00031%)/-111dB (0.00028%) |
Interchannel Crosstalk @ 1kHz, typ. | < -125 dB |
EIN @ >40 dB Gain (150Ω Source Impedance, A-weighted, typ.) | < -128 dBu |
Common Mode Rejection Rate (20 Hz – 20 kHz) | > 60 dB (up to 0 dBFS) |
Phantom Power (Software Switchable Per Channel) | +48V |
Phase Reverse (Software Switchable Per Channel) | YES |
Low Cut filter (Software Switchable Per Channel) | -12 dB/octave, 80 Hz |
Line Input | |
Max Line Input for 0 dBFS | +24 dBu |
Input Impedance (Differential) | 10 kΩ |
Dynamic Range (A-weighted, typ), ref +24 dBu | 124 dB |
THD+N Line+A/D (20 Hz - 20 kHz) @ -10 dBFS | < -110dB (0.00031%)/-111dB (0.00028%) |
Interchannel Crosstalk @ 1kHz @ fullscale | < -130 dB |
Sensitivity Range for 0 dBFS (software controlled) | -42 dBu to +24 dBu |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
Common Mode Rejection Rate (20 Hz – 20 kHz) | > 60 dB / > 65dB (both up to 0 dBFS) |
Connector Pinout | DB-25 / AES59 (Tascam Ana.) |

AKD8D/AKD8DP Mic-Pre Analog Section |
|
Frequency response +0/-0.5 dB, Line | 2 Hz - > 200 kHz |
Frequency response +0/-2.0 dB, Line | 1 Hz - > 200 kHz |
Frequency response +0/-0.5 dB, Mic, at G=40dB | 2 Hz - 65 kHz |
Frequency response +0/-2.0 dB, Mic, at G=40dB | 1 Hz - 160 kHz |
THD+N (1 kHz), Line/Mic at G=0dB | < -115 dB (0.00018 %) |
THD+N (20 Hz-20 kHz) , Line/Mic at G=0dB | < -112 dB (0.00025 %) |
Interchannel Crosstalk @ 1kHz, typ. | -140dB |
5° low-end in-channel Ø deviation pt: Line | 9 Hz |
5° low-end in-channel Ø deviation pt: Mic | 9 Hz |
Interchannel phase 10 Hz - 100 kHz | < ±0.1° |

AKD8D/AKD8DP Analogue Direct Output Section |
|
Frequency response +0/-0.5dB @ Gain 40 dB | 2 Hz – 65kHz |
Max Direct Output Level, typ | +24 dBu / +13 dBu |
Direct Output Impedance (Differential) | > 100 Ω |
Dynamic Range (flat 20 Hz-20 kHz, typ.) | 140 dB |
THD+N (1 kHz) @ +10dBu | < -120dB (0.0001 %) |
Direct Output Connector Pinout | DB-25 / AES59 (Tascam Ana.) |

AD8D / AD8DP

Mic Pre-Amp + ADC |
|
Mic Pre Max Input (Pad On / Pad Off) | +24 dBu / +13 dBu |
Input Impedance (Differential, Software Switchable Per Channel) | 2 kΩ / 13.6 kΩ |
Input Impedance with +48V ON (Diff., Soft. Switchable Per Channel) | 1.7 kΩ / 6.8 kΩ |
Dynamic Range (A-weighted, typ.) , ref +13 dBu | 120.5 dB |
Gain Range (software controlled) | 0 dB to +66 dB |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
THD+N Pre + A/D (20 Hz-20 kHz) @ -2 dBFS (Standard/Premium) | < -96dB (0.0016 %) / -100 dB (0.001 %) |
Interchannel Crosstalk @ 1kHz, typ. | <-125 dB |
EIN @ >40 dB Gain (150Ω Source Impedance, A-weighted, typ) | < -128 dBu |
Common Mode Rejection Rate @ 1kHz, typ. | > 60 dB (up to 0 dBFS) |
Phantom Power (Software Switchable Per Channel) | +48V |
Phase Reverse (Software Switchable Per Channel) | YES |
Low Cut filter (Software Switchable Per Channel) | -12 dB/octave, 80 Hz |
Line Input | |
Max Line Input for 0 dBFS | +24 dBu |
Input Impedance (Differential) | 13.6 kΩ |
Dynamic Range (A-weighted, typ), ref +24 dBu | 121 dB |
THD+N Line+A/D (20 Hz-20 kHz) @ -12 dBFS, typ. | < -100 dB (0.001%) |
Interchannel Crosstalk @ 1kHz, typ. | < -120 dB |
Sensitivity Range for 0 dBFS (software controlled) | -42 dBu to +24 dBu |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
Common Mode Rejection Rate (20 Hz – 20 kHz) | > 60 dB (up to 0 dBFS) |
Input Connector Pinout (DB-25 female) | DB-25 / AES59 (Tascam Ana.) |

AD8D/AD8DP Mic-Pre Analog Section |
|
Frequency response +0/-0.5 dB, Line | 5 Hz - 75 kHz |
Frequency response +0/-2.0 dB, Line | 2.5 Hz - 150 kHz |
Frequency response +0/-0.5 dB, Mic | 10 Hz - 100 kHz |
Frequency response +0/-2.0 dB, Mic | 5 Hz - 200 kHz |
THD+N (1 kHz), Line/Mic at G=0dB | <-115 dB (0.00018 %) |
THD+N (20 Hz-20 kHz) , Line/Mic at G=0dB | <-112 dB (0.00025 %) |
Interchannel Crosstalk @ 1kHz, typ. | -135dB |
5° low-end in-channel Ø deviation pt: Line | 13 Hz |
5° low-end in-channel Ø deviation pt: Mic | 35 Hz |
Interchannel phase 10 Hz - 100 kHz | < ±0.1° |

AD8D/AD8DP Analogue Direct Output Section |
|
Frequency response +0/-0.3dB @ Gain 40 dB | 10 Hz - 50 kHz |
Max Direct Output Level, typ | +24 dBu / +13 dBu |
Direct Output Impedance (Differential) | < 100 Ω |
Dynamic Range (A-weighted, typ) | 133 dB |
THD+N (1 kHz) @ +10dBu | < -120dB (0.0001 %) |
Direct Output Connector Pinout | DB-25 / AES59 (Tascam Ana.) |

ADA8

Mic-Pre + ADC Section |
|
Mic Pre Max Input (Pad On / Pad Off) | +24 dBu / +13 dBu |
Input Impedance (Differential, Software Switchable Per Channel) | 2 kΩ / 6.8 kΩ |
Frequency response +0/-0.3dB @ fs = 48 kHz | 10 Hz – 22 kHz |
Frequency response +0/-0.3dB @ fs = 96 kHz | 10 Hz – 44 kHz |
Frequency response +0/-0.3dB @ fs = 192 kHz | 10 Hz – 85 kHz |
Dynamic Range (A-weighted, typ.), ref +13 dBu | 119.5 dB |
Gain Range (software controlled) | 0 dB to +66 dB |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
THD+N Pre + A/D (20 Hz - 20 kHz) @ -2 dBFS | < -102 dB (0.0008 %) |
Interchannel Crosstalk @ 1kHz | < -125 dB |
EIN @ >40 dB Gain (150Ω Source Impedance, A-weighted) | < -128 dBu |
Common Mode Rejection Rate (20 Hz – 20 kHz) | > 60 dB (up to 0 dBFS) |
Phantom Power (Software Switchable Per Channel) | +48V |
Phase Reverse (Software Switchable Per Channel) | YES |
Low Cut filter (Software Switchable Per Channel) | -12 dB/octave, 80 Hz |
Line Input Section | |
Max Line Input for 0 dBFS | +24 dBu |
Input Impedance (Differential) | 13.6 kΩ |
Dynamic Range (A-weighted, typ), ref +24 dBu | 120 dB |
THD+N Line+A/D (20 Hz - 20 kHz) @ -2 dBFS | < -102 dB (0.0008%) |
Interchannel Crosstalk @ 1kHz, typ. | -125 dB |
Sensitivity Range for 0 dBFS (software controlled) | -42 dBu to +24 dBu |
Gain Step/Precision | 0.5 dB / ±0.2 dB |
Common Mode Rejection Rate (20 Hz – 20 kHz) | > 60 dB (up to 0 dBFS) |
Connector Pinout (DB-25 female) | DB-25 / AES59 (Tascam Ana.) |
Line Output Section |
|
Max Output level software switchable for 0 dBFS | +24 dBu / +18 dBu +0/-0.5 dB |
Frequency response +0/-0.3dB @ fs = 48 kHz | 6 Hz – 22 kHz |
Frequency response +0/-3dB @ fs = 96 kHz | 6 Hz – 44 kHz |
Frequency response +0/-3dB @ fs = 192 kHz | 6 Hz – 88 kHz |
Output Impedance (Differential) | < 100 Ω |
Dynamic Range (A-weighted, typ.) | 123 dB |
THD+N (1 kHz) @ 0dBFS | < -108 dB (0.0004 %) |
Interchannel Crosstalk @ 1kHz | < -135 dB |
Connector Pinout | DB-25 / AES59 (Tascam Ana.) |
Latencies |
|
Input latency at 44.1/48kHz | 16 samples |
Input latency at 88.2/96kHz | 16 samples |
Input latency at 176.4/192kHz | 13 samples |
Output latency at 44.1/48kHz | 9* samples |
Output latency at 88.2/96kHz | 9* samples |
Output latency at 176.4/192kHz | 9* samples |
* Filter setting - Slow Roll Off Filter option = 9 Samples - Sharp Roll Off Filter option = 38 Samples |

DA8/DA8P

DA8/DA8P Specifications |
|
Max Line Output @ 0 dBFS (jumpers on +24 dBu) | +24 dBu +0/-0.5 dB |
Frequency response +0/-0.3dB @ fs = 48000 Hz | 6 Hz – 20 kHz |
Frequency response +0/-0.3dB @ fs = 2.8224 MHz (DSD) | NA / 6 Hz – 20 kHz |
Frequency response +0/-3.0dB @ fs = 2.8224 MHz (DSD) | NA / 2 Hz – 50 kHz |
Line Output Impedance (Differential) | 100 Ω |
Dynamic Range (A-weighted, typ) | 126 dB |
THD+N D/A (1 kHz) @ 0 dBFS (IOM-HORUS-DA8) | < -113dB (0.00022 %) |
THD+N D/A (1 kHz) @ 0 dBFS (IOM-HORUS-DA8P) | < -115dB (0.00018 %) |
Interchannel Crosstalk @ 1kHz, typ. | -135 dB |
Connector Pinout (DB-25 female) | AES59/Tascam Analog |
Line Output Section |
|
Max Output level software switchable for 0 dBFS | +24 dBu / +18 dBu +0/-0.5 dB |
Frequency response +0/-0.3dB @ fs = 48 kHz | 6 Hz – 22 kHz |
Frequency response +0/-3dB @ fs = 96 kHz | 6 Hz – 44 kHz |
Frequency response +0/-3dB @ fs = 192 kHz | 6 Hz – 88 kHz |
Output Impedance (Differential) | < 100 Ω |
Dynamic Range (A-weighted, typ.) | 123 dB |
THD+N (1 kHz) @ 0dBFS | < -108 dB (0.0004 %) |
Interchannel Crosstalk @ 1kHz | < -135 dB |
Connector Pinout | DB-25 / AES59 (Tascam Ana.) |
Latencies |
|
Input latency at 44.1/48kHz | 16 samples |
Input latency at 88.2/96kHz | 16 samples |
Input latency at 176.4/192kHz | 13 samples |
Output latency at 44.1/48kHz | 9* samples |
Output latency at 88.2/96kHz | 9* samples |
Output latency at 176.4/192kHz | 9* samples |
* Filter setting - Slow Roll Off Filter option = 9 Samples - Sharp Roll Off Filter option = 38 Samples |

All specifications subject to change

Check out the System Solution Pages for ideas on how our networked converters can be used with our software.
Or see our Networked Audio Range for ANY Workstation page for usage in 3rd parties DAWs