ADX Frequently-Asked Questions

What method does the ADX use for audio transmission?
The ADX systems use either Cirrus Cobranet or Audinate Dante network protocol to transmit audio over a standard Ethernet data network. Both of the protocols are industry-standard, professional audio networking protocols, and provide low latency, highest-quality digital audio transport. Both are compatible with products supplied by other manufacturers which also use these protocols.
Is this transmission like 'streaming' audio over the web?
No, not at all. The audio is full-bandwidth, uncompressed, and low-latency. Both Cobranet and Dante were designed from the ground up to be used in professional audio applications where reliability and performance are paramount. All analog and digital circuitry in the ADX products is designed for the very highest quality. The sample rate is 48kHz, and the resolution is 24-bit for Dante and 20-bit for Cobranet.
Do the ADX systems provide for fiber transmission?
Absolutely. This is one of the many advantages of Ethernet as the transmission medium. It is a natural for fiber transport. Most Ethernet switches have two or more fiber ports built in, and the ADX-8000 switch has four fiber ports. The SFP modules that support these fiber ports are available in inexpensive bi-directional types which can support up to 40Km of single-mode fiber. A single strand of fiber is sufficient to support a large announce booth, and it's easy to use redundant paths to protect against fiber failure.
What's the difference between Cobranet and Dante protocols?
Both provide high-quality reliable transport of audio over networks. Cobranet was developed by Peak Audio about fifteen years ago, and was the original professional audio networking technology. It works very well, but newer technologies have emerged since Cobranet's development. One of the newer technologies is Dante, developed by Audinate in Australia. This protocol allows channel-by-channel routing, where Cobranet requires that audio be routed in 'bundles' of channels, and is more restricted in terms of system configuration. Dante is being rapidly adopted by the broadcast and live sound industries, and is supported by a wide variety of manufacturers. Lance Design has available plug-in network cards for both Cobranet and Dante, and all of our products can be configured to support either protocol.
How many channels does the ADX-2400 provide?
Each ADX-2400 frame provides 24 inputs and 24 outputs, which may be operated simultaneously. Local inputs/outputs are available in either analog, AES, or MADI format.
What is the ADX-8000?
The ADX-8000 Switch/Dual Power Supply is a high-performance Ethernet switch and redundant power supply unit specifically designed to provide power and the network interface for ADX-120 Announce Units and ADX-140 XLR Panels. The ADX-8000 includes four gigabit Ethernet fiber ports on bidrectional ST connectors on the front panel, making it a very convienent and reliable solution to providing the network connectivity in an announce booth or other remote location.
How do the PLs work on ADX systems?
The 'truck end' connections are to the ADX-2400s, and are four-wire. They can be analog (dry, balanced), AES, or MADI. The remote or booth ends are via the ADX-120s or ADX-140s, and are RTS-format two-wire wet circuits, designed to directly drive RTS BP-325 or similar beltpacks without any additional equipment. There is a four-wire matrix in the ADX-2400 that allows assignment of ADX-120 and ADX-140 PL channels to specific four-wire ports, similar in function to the familiar TW 'thumbwheel' assignment panels.
How good are the mic preamps in the ADX-120s and ADX-140s?
They are very good. Both units utilize some of the highest-quality monolithic preamp chips and careful design to provide very low-noise, transparent mic paths that are among the best in the industry. The A/D conversion is 24-bit and very clean. Remote gain control and phantom power selection is available from the ADX-2400.
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