Mackie M2600 INPUT, XLR, TRS

Ordinarily, applying a positive

voltage to a speaker’s positive

input and negative voltage to

the negative input results in

an outward excursion of the woofer. But some woofers are

built with reverse polarity, meaning that the above conditions result in an inward excursion.

If you’re not sure which type of speakers you have, take a look at their literature. If you’re still not sure, here is a simple test: remove the speaker wires from the back of the speakers, then take a 1.5V flashlight battery and connect the positive terminal of the battery to the positive (+) input of the speaker, and connect the negative terminal of the battery to the negative

(–)input of the speaker. Observe the motion of the speaker cone. It should move out when volt- age is applied, and return to rest when voltage is removed. Make sure all the speakers in the system move in the same direction (there are a few exceptions — some speakers are deliber- ately designed with reverse-polarity woofers).

INPUT

The M•2600 amplifier gives you a choice — it has the traditional XLR inputs, as well as 1/4" TRS (tip-ring-sleeve) input jacks. Sonically (and electrically) they’re identical, so choose either one, but do not use both at the same time to send signals into the M•2600.

Each can be used with either balanced or unbalanced signals.

When connecting a balanced signal using the XLR or 1/4" jacks, they’re wired as shown, per AES (Audio Engineering Society) standards:

	XLR	TRS
Hot (+)	Pin 2	Tip
Cold (–)	Pin 3	Ring
Shield (Ground)	Pin 1	Shield

RING SLEEVE	SLEEVE RING TIP
TIP
	RING (COLD)
	TIP (HOT)
	SLEEVE (SHIELD)
Balanced 1/4" TRS Plug

Unbalanced TS (tip-sleeve) lines can be accommodated via the TRS jack. Make sure the cord terminates with a TS plug (like a guitar plug), or if it’s a TRS plug (like a headphone plug), make sure the ring is tied to the shield, preferably at the source.

SLEEVE SLEEVE TIP

TIP

RING (COLD)

TIP (HOT)

SLEEVE (SHIELD)

Unbalanced 1/4" TS Plug

1CHANNEL

INPUT						CROSSOVER
BALANCED	LOW CUT FILTER
OR				TYPICAL	60Hz	90Hz	120Hz
UNBALANCED
				35 Hz
			R	STAGE
	O	F	E	MONITOR
	O
	W

B100 Hz

U

S

OFF 170 Hz

	AMP MODE
STEREO	MONO BRIDGED
TYPICAL
		CH's
	SUMMED
OUTPUT APPLICATION
	FULL	LOW OUT
	RANGE	(SUB WOOFER)

CROSSOVER

60Hz 90Hz 120Hz

				CHANNEL 2
				INPUT
LOW CUT FILTER				BALANCED
		TYPICAL		OR
				UNBALANCED
			35 Hz
		R	STAGE
O	F	E	MONITOR
O
W			100 Hz
U
B
S
		OFF	170 Hz

THRU

THRU LOW HIGH OUT OUT

IN

SWITCHED OUTPUT

OFF

ON

TYPICAL

LIMITER

(CH1 & CH2)

THRU

HIGH LOW THRU

OUT OUT

IN

SWITCHED OUTPUT

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