Nilfisk-ALTO MAC 2.3, MAC 2.4 user manual Technical Specifications

6.2 Caution for Speaker Connection

The output capacity of MAC 2.2/2.3/2.4 stereo power amplifier is very high, be sure to use a speaker system that has sufficient input capacity. If the input capacity of your speaker system is lower than the rated output of the MAC 2.2/ 2.3/2.4 stereo power amplifier, you can protect your speakers by connecting a fuse serially between the speaker and the amplifier as shown below.

(+)

(-)

Output

Fuse

+Speaker - System

ON

CH1CH2

OFF

POWER

Use the following formula to determine the fuse capacity according to the speaker's input capacity.

Po=I2 R I=Po/R

Po[W] : Speaker's continuous input capacity (noise or RMS)

R[ ] : Speaker's nominal impedance

I[A] : Required fuse capacity

As to the speaker cable, if you use a long one, use as thick a cable as possible to prevent deterioration of the damping factor or power loss inside the cable.

7.TECHNICAL SPECIFICATIONS

7.1Specifications

POWER SPECIFICATIONS		MAC 2.2		MAC 2.3	MAC 2.4
STEREO MODE	2 Ohms	480		800	1400
(Both channels driven)	4 Ohms	300		450	750
20Hz~20KHz
	8 Ohms	205		310	575
Bridge Mono Mode	8 Ohms	560		900	1500
20Hz~20kHz	4 Ohms	800		1400	2500
ELECTRICAL SPECIFICATIONS		600W		900W	1500W
INPUT SENSITIVITY		1.15V(+3.4dBu)		1.15V(+3.4dBu)	1.15V(+3.4dBu)
INPUT IMPEDANCE		10K Unbalanced	20K	Balanced
FREQUENCY RESPONSE		25Hz~25KHz +0/-1dB
(at 10dB below rated output power)		-3dB points: 5Hz~50KHz
VOLTAGE GAIN		30dB		32dB	34dB
DISTORTION(SMPTE-1M)		<0.03%		<0.03%	<0.03%
S/N ratio		100dB		100dB	100dB
GENERAL SPECIFICATIONS		600W		900W	1500W
		Full short circuit, open circuit, thermal, ultrasonic, and RF protection stable into reactive
PROTECTIONS		or mismatched loads, turn ON/OFF, muting, tried crowbar.
		Front: AC switch 40-detect input level control for each channel.
CONTROLS		Rear: stereo/ parallel/ bridged selector, 30Hz filter selector clip ON/OFF selector.
INDICATORS		SIGNAL: 2 green LED		CLIP: 2 red LED
		POWER: 1 Blue LED		PROTECTION: 1 red LED
CONNECTORS		INPUT : Active balanced XLR and 1/4"(6.3mm)TRS
		OUTPUT: "Touch-proof" binding posts and speak-on jacks.
POWER SUPPLY		Available for 110-120V or 220~240V AC, 50/60Hz
DIMENSIONS		483(W) 400(D)	88.8(H)mm
WEIGHT		14.4kg		16.54kg	19.02kg

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