Dual WIRE/SINGLE Wire Switch, Power Receptacle

24. DUAL WIRE/SINGLE WIRE Switch

The original AES/EBU speciﬁcation (IEC958 Type 1) provides for carrying two channels of digital audio at resolutions up to 24-bit at 48 kHz. When higher sam- pling rates became possible, two methods were devel- oped to transmit the digital audio at the higher sample rates—double-fast and double-wide.

The double-fast method (single wire) clocks the digital I/O port at twice the speed to get twice the infor- mation through, providing support for resolutions up to 24-bit at 96 kHz.

The double-wide method (dual wire) transmits one channel of digital audio instead of two channels through a single digital I/O port, again providing support for resolutions up to 24-bit at 96 kHz.

This presents a problem when interconnecting digital audio equipment. Devices using the double-fast method can’t talk to devices using the double-wide method.

Remember the old Beta vs. VHS format wars? Maybe not. Well, the Onyx 800R has solved this dilemma with the ﬂip of a switch! Here’s how it works:

At sampling rates up to 48 kHz: The position of the DUAL WIRE/SINGLE WIRE switch doesn’t matter. Two channels of digital audio are transmitted on a single wire (one 3-pin XLR) as speciﬁed by the AES/EBU standard.

At sampling rates of 88.2 kHz through 192 kHz: When connecting to devices that use the double-fast method, set the switch to the SINGLE WIRE position. This transmits two channels on a single wire (3-pin XLR) at twice the speed (88.2/96 kHz) or four times the speed (176.4/192 kHz). When connecting to devices that use the double-wide method, set the switch to the DUAL WIRE position. This transmits one channel on one wire (one 3-pin XLR) at normal speed (88.2/96 kHz) or twice the speed (176.4/192 kHz), but using twice the band- width. In the DUAL WIRE position at these sampling rates, only channels 1-4 are available.

Check the owner’s manual for the device you are con- necting to the Onyx 800R, to ﬁnd out which method it supports.

Note: The analog and optical outputs are not affected by the AES/EBU OR S/PDIF OUT settings.

25. Power Receptacle

This is a standard 3-prong IEC power connector. Connect the detachable linecord (included in the box with your Onyx 800R) to the power receptacle, and plug the other end of the linecord into an AC outlet. The Onyx 800R has a universal power supply that can accept any AC voltage ranging from 100 VAC to 240 VAC. No need for voltage select switches. It will work virtually anywhere in the world. That’s why we call it a “Planet- Earth” power supply! This also means that it is less susceptible to voltage sags or spikes, providing greater electromagnetic isolation and better protection against AC line noise.

Owner’s Manual

CH	CH	CH	CH	CH	CH	CH	CH	CH	CH	CH	CH
1-2	3-4	5-6	7-8	1-2	3-4	5-6	7-8	1	2	3	4
	Single Wire				Single Wire				Dual Wire
	(Two-Channel)				(Two-Channel)				(Single-Channel)
	@ 44.1/48 kHz (1x)				(Double-Fast)				(Double-Wide)
					@ 88.2/96 kHz (2x)				@ 88.2/96 kHz (1x)
					@ 176.4/192 kHz (4x)				@ 176.4/192 kHz (2x)

Owner’s Manual

800R specifications

The Mackie 800R is a high-performance 8-channel microphone preamp that is designed for recording professionals and studios that demand exceptional sound quality and flexibility. This versatile unit stands out due to its robust build quality, advanced features, and user-friendly operation, making it a vital addition to any audio setup.

One of the main features of the Mackie 800R is its high-quality mic preamps, which employ the renowned Onyx technology. The Onyx preamps are characterized by their high headroom, low noise, and excellent linearity, resulting in clear, detailed sound reproduction. Each channel provides a gain range of up to 60 dB, allowing it to accommodate a wide variety of microphones, from dynamic to condenser, ensuring your recordings are always crisp and professional.

The 800R also includes eight balanced TRS outputs, which allow for seamless integration with mixers and audio interfaces. This flexibility simplifies the workflow in any recording environment, making it easy to patch into existing setups. Additionally, the unit features both analog and digital outputs, providing options for connecting to ADAT and S/PDIF devices, further enhancing its versatility.

Another notable characteristic of the Mackie 800R is its user-friendly interface. Each channel is equipped with a direct output, a 48V phantom power switch, and a -20dB pad, which allows users to tailor their settings on the fly. The built-in LED indicators provide visual feedback on signal levels, ensuring that users can easily monitor their inputs.

This preamp is also designed for durability with its solid metal chassis, which is built to withstand the rigors of both studio and live environments. Its compact size makes it ideal for mobile setups, allowing engineers to take high-quality audio with them wherever they go.

In summary, the Mackie 800R is a powerful and reliable microphone preamp that provides outstanding sound quality and flexibility for recording engineers and musicians alike. With advanced Onyx preamp technology, multiple output options, and a user-friendly design, the 800R stands out as an essential tool for anyone serious about capturing high-fidelity audio.