TECHNICAL SPECIFICATIONS
3D Active Ambient System
Notes:
1. For measurements, earpiece is terminated in a Zwislocki
coupler: IEC Type 60318-4 Occluded Ear Simulator.
2. The 3D-AARO bodypack mixer was introduced March
2014, replacing Model 3D-M. Both have identical audio
and electrical specifications.
3. 3D-AARO has a pure analog signal path, and thus zero
system latency.
Frequency Response
20 Hz – 20 kHz
Maximum SPL, 500 Hz
Single-driver earpiece
124 dB-SPL
Dual-driver earpiece
Ambient Microphone Input Overload, 500 Hz
140 dB-SPL
Full Ambient Mode Insertion Gain
0 dB
Monitor Input Sensitivity (for 124 dB-SPL, 500 Hz)
3D-AARO Mixer, unbalanced drive (pin 2 hot)
0 dBV
Monitor Input Impedance
3D-AARO Mixer
20 kOhm
Ambient Mode Equivalent Input Noise
27 dBA-SPL
Monitor Mode Equivalent Input Noise
Single-driver earpiece (A-weighted)
-104 dBV
Dual-driver earpiece (A-weighted)
-101 dBV
Output Noise
Single-driver earpiece
20 dBA-SPL
Dual-driver earpiece
23 dBA-SPL
Limiter
Type: Slow, average responding, frequency selective, linked left-right;
dual independent for monitor and ambient signals
Limiter threshold (both operating modes)
105 dBA-SPL
output levels
Limiter threshold (monitor signal, Full Ambient mode) 85 dBA-SPL
output levels
14
The 3D Active Ambient System (U.S. Patent #8,160,261) is
designed to add ambient audio to the IEM mix without
distortion or added latency. The 3D system components
(ambient earphones and bodypack mixer) will only operate
properly when used together.
NOTE: 105 dBA is not considered a safe level for extended
listening. The intention of the limiter is to provide a musically
pleasing limiting function while guarding against occasional
excessive levels. Monitoring levels for extended perfor-
mance times should not be entering the limiting region.
130 dB-SPL
