Mackie 1220i 32. –20and OL LEDs, 33. CHANNEL FADER, 34. SOLO, 21U

1

2

3

4

CTRL - RM

BAL/UNBA

YX

M

YX

M

YX

M

YX

M

IC

PR

IC

PR

IC

PR

IC

PR

N

N

N

N

O

E

O

E

O

E

O

E

9											12
										L
									LINE IN 5-6
10	1			2		3		4			L
	LINE			LINE		LINE		LINE	11		(MONO)
18	BAL/UNBAL			BAL/UNBAL		BAL/UNBAL		BAL/UNBAL			BAL/UNBAL
	LINE			LINE
	HI-Z			HI-Z	75Hz		75Hz				R
					18dB/OCT		18dB/OCT
19	48V 20			48V		48V		48V
30		30			30		30			U
20 U		20 U			20 U		20 U
	40			40		40		40
21U	60	U		60	U	60	U	60			GAIN
	GAIN			GAIN		GAIN		GAIN
-20dB	+40dB	-20dB	+40dB		-20dB	+40dB	-20dB	+40dB	-20dB		+20dB
SEND		SEND			SEND		SEND		SEND
22	PRE			PRE		PRE		PRE			PRE
	POST			POST		POST		POST			POST
U	EQ		U	EQ	U	EQ	U	EQ		U	EQ
24	HIGH			HIGH		HIGH		HIGH			HIGH
	12kHz	-15		12kHz	-15	12kHz	-15	12kHz			12kHz
-15	+15			+15		+15		+15	-15		+15
1k		1k			1k		1k			U 27
25	FREQ			FREQ		FREQ		FREQ
100	8k	100		8k	100	8k	100	8k			MID
U			U		U		U
26											2.5kHz
	MID			MID		MID		MID	-15		+15
-15	+15	-15		+15	-15	+15	-15	+15
U			U		U		U			U
28	LOW			LOW		LOW		LOW			LOW
	80Hz			80Hz		80Hz		80Hz			80Hz
-15	+15	-15		+15	-15	+15	-15	+15	-15		+15
	AUX			AUX		AUX		AUX			AUX
29	1			1		1		1			1
OO	MAX	OO		MAX	OO	MAX	OO	MAX	OO		MAX
29	2			2		2		2			2
OO	MAX	OO		MAX	OO	MAX	OO	MAX	OO		MAX
30	PAN			PAN		PAN		PAN			PAN
	R			R		R		R			R
L		L			L		L		L

31 MUTE			MUTE	MUTE	MUTE		MUTE
	ALT 3/4		ALT 3/4	ALT 3/4	ALT 3/4		ALT 3/4
	dB		dB	dB	dB		dB
	10	32	10	10	10		10
	5		5	5	5		5
	U		U	U	U		U
		OL	OL		OL	OL	OL
	5	- 20	5	5	5	- 20	5
33			- 20		- 20		- 20
	10		10	10	10		10
	20		20	20	20		20
	30		30	30	30		30
	40		40	40	40		40
	50		50	50	50		50
	60		60	60	60		60
	OO		OO	OO	OO		OO
34 SOLO			SOLO	SOLO	SOLO		SOLO
		1	2		3	4	5-6

32. –20 and OL LEDs

These LEDs indicate the channel’s signal level after the gain and EQ controls, but just before the channel’s level. So even if the level is turned down, you can see if a signal is present, or if the channel is being overloaded.

The OL (overload) LED will come on when the channel’s input signal is too high. This should be avoided, as distortion will occur. If the OL LED comes on regularly, check that the gain control [21] is set correctly for your input device, and that the channel EQ is not set with too much boost.

The –20 LED comes on when the channel signal strength has reached that level.

33. CHANNEL FADER

This is the last control in a channel’s signal path, and it adjusts the level of each channel onto the main mix. The “U” mark indicates unity gain, meaning no increase or decrease of signal level. All the way up provides an additional 10 dB, should you need to boost a section of a song. If you find that the overall level is too quiet or too loud with the level near unity, check that the gain control [21] is set correctly.

34. SOLO

Whenever a solo switch is engaged, you will only hear the soloed channel(s) in the headphones and control room. This gives you the opportunity to audition the channels before they are added to the main mix or alt 3–4 mix. You can still hear, even when the fader is down.

Solo is also used to set the gain of each channel correctly. When a channel is soloed, you can adjust the channel gain [21] until your input source reaches the level of the 0 dB LED of the right meter.

Solo signals reaching the headphones and

control room are not affected by the channel level or main level; therefore, turn down the phones level [39] and control room level [38] first, as

soloed channels may be loud.

The rude solo light [41] will turn on as a reminder that what you are listening to in the headphones and control room is just the soloed channel(s).

For stereo channels, the mono sum of the left and right is soloed.

Soloed channels are sent to the source mix, which ultimately feeds your control room, phones, and meters. Whenever solo is engaged, all source selections (main mix, alt 3-4, tape, and FireWire) are defeated, to allow the soloed signal to do just that—solo!

Owner's Manual 21