Mackie 1620 46. Power Receptacle, 47. TALKBACK MIC, 49. MAIN OUTPUT LEVEL, 51. AUX RETURN, 52. CHANNEL INSERT

46. Power Receptacle 50. AUX SEND 1-4

This is a standard 3-prong IEC power connector. Connect the detachable linecord (included in the box with your Onyx 1620) to the power receptacle, and plug the other end of the linecord into an AC outlet. The Onyx 1620 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.

47. TALKBACK MIC

This is where you plug in your external talkback microphone if you need to have one. This female XLR connector has +48 VDC phantom power always applied, so you can use dynamic or condenser microphones.

Note: Almost all dynamic microphones can be used with phantom power, but you might want to check the documentation that came with your microphone to be sure.

48. RIGHT/LEFT MAIN OUTPUTS

These male XLR connectors provide a balanced line- level signal that represent the end of the mixer chain, where your fully mixed stereo signal enters the real world. Connect these to the inputs of your main power amplifiers, powered speakers, or serial effects processor (like a graphic equalizer or compressor/limiter). It provides a fully balanced signal that is the same as the 1/4" TRS MAIN OUT jacks on the front panel.

49. MAIN OUTPUT LEVEL

When this switch is out (+4 dB), the XLR MAIN OUTPUTS provide a +4 dBu line-level signal. When the switch is pushed in (MIC), the signal is attenuated by 40 dB to a microphone level. You can connect the XLR MAIN OUTPUTS to the microphone inputs of another mixer, providing a submix for keyboards or drums, for example, in a live sound application.

Note: You can safely plug this output into a microphone input that provides 48 V phantom power.

These 1/4" TRS output connectors provide balanced or unbalanced line-level signals for connecting to the inputs of effects devices or stage monitor amplifiers.

51. AUX RETURN 1-4

These 1/4" TRS input connectors accept balanced or unbalanced line-level stereo signals from an external processor or other device. The stereo AUX RETURNS use jack normalling, like the stereo inputs on channels 9-16. If a signal is plugged into the LEFT (MONO) side and nothing is plugged into the RIGHT side, the signal is automatically connected to both LEFT and RIGHT sides. As soon as something is plugged into the RIGHT side, the normalled connection is broken and the LEFT and RIGHT inputs become stereo inputs (LEFT goes to the LEFT MAIN OUT and RIGHT goes to the RIGHT MAIN OUT).

52. CHANNEL INSERT

These 1/4" TRS jacks provide a send and return point for channels 1-8. Use the CHANNEL INSERT jacks to connect serial effects devices such as compressors, equalizers, de-essers, or filters to each individual channel.

The INSERT points are after the GAIN and Low Cut controls, but before the EQ and Fader controls. The send (tip) is low-impedance, capable of driving any device. The return (ring) is high-impedance and can be driven by almost any device.

Special insert cables are available, specially designed for this kind of insert jack. They are wired as follows:

	ring		SEND to processor
tip		(TRS plug)	“tip”
	sleeve
this plug connects to one of the			“ring”
mixer’s Channel Insert jacks.
			RETURN from processor

Tip = Send (output to effects device) Ring = Return ( input from effects device) Sleeve = Common ground (connect shield to all three sleeves)

Manual s’Owner

POWER

ON

~100-240 VAC 50-60 Hz 55W

TALKBACK RIGHT MAIN LEFT

MIC	BALANCED	BALANCED
+48V
		+4dB
		MIC
		MAIN
		OUTPUT
		LEVEL
CAUTION	WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT
RISK OF ELECTRIC SHOCK	EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. DO NOT REMOVE COVER.
	NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL.
DO NOT OPEN	AVIS: RISQUE DE CHOC ELECTRIQUE — NE PAS OUVRIR

DESIGNED BY MACKOIDS IN WOODINVILLE, WA, USA

"MACKIE" & "ONYX" ARE TRADEMARKS OF LOUD TECHNOLOGIES INC. • COPYRIGHT ©2003

AUX SEND					CHANNEL INSERTS
2	1			( PRE-FADER / PRE EQ		TIP SEND / RING RETURN )
		8	7	6	5	4	3	2	1
4	3		4 LEFT	RIGHT 3	AUX RETURNS			RIGHT 1
		RIGHT			LEFT	RIGHT 2	LEFT		LEFT
						SERIAL NUMBER	MANUFACTURING DATE
			LISTED COMMERCIAL
		R	AUDIO EQUIPMENT
			65HJ

Owner’s Manual 19