MB QUART RAB 1450 manual Thd & N

TECHNICAL DATA

Features	RAB 250	RAB 450	RAB 1450
	2-CHANNEL	4-CHANNEL	MONO
Output power rating Watt RMS
(14.4V battery)
4-Ohms	50 x 2	50 x 4	200 x 1
2-Ohms	90 x 2	80 x 4	300 x 1
1-Ohm	–	–	450 x 1
Mono bridge at 4-Ohms	180 x 1	160 x 2	–
Miscellaneous specifications
Slow unmute at turn on (soft start)	Yes	Yes	Yes
Frequency response, -3 dB	10Hz - 30kHz	10Hz - 30kHz	10Hz - 250Hz
Damping factor	>200	200	>250
Signal to moise ratio (A-weighted)	>95 dB	>95 dB	>95 dB
THD & N	0.05 %	0.03 %	0.10 %
Channel separation at 1 kHz	>70 dB	>70 dB	70 dB
Variable input level control	0.2 V - 6.0 V	0.2 V - 6.0 V	0.2 V - 6.0 V
Input impedance	47 kΩ	47 kΩ	47 kΩ
Power and diagnostic LED	Yes	Yes	Yes
Protection:
DC, short, thermal, overload	Yes	Yes	Yes
Power supply, all MOSFET PWM	Yes	Yes	Yes
Audio output, all Bipolar	Yes	Yes	Yes
Crossover and switching
Input selector switch	No	Yes	No
Channels 1/2	FULL/HP/LP	HP/FULL/LP	–
Variable high pass, 12 dB/octave	10 Hz - 4.8 kHz	50 Hz - 5.0 kHz	–
Variable Mono low pass, 24 dB/octave	–	–	35 Hz - 250 Hz
Bass boost at 45 Hz	–	–	0 - 9 dB
Subsonic	–	–	10 Hz - 50 Hz
Channels 3/4	–	HP/FULL/LP	–
Variable high pass, 12 db/octave	–	10 Hz - 1.0 kHz	–
Variable Mono low pass, 24 dB/octave	–	50 Hz - 5.0 kHz	–
Bass boost	–	–	–
Connector types
Unbalanced inputs (RCA)	Yes	Yes	Yes
Line output (RCA)	Selectable	Selectable	Selectable
Phone jack for remote control	No	No	Yes
Bass boost remote control Module MBQR-1	No	No	Yes
Mechanical
Molded power terminal	8-GA (10 mm²)	8-GA (10 mm²)	4-GA (25 mm²)
Molded speaker terminals	8-GA (10 mm²)	8-GA (10 mm²)	8-GA (10 mm²)
Fuse type	ATC	ATC	ATC
Fuse Size	20 Amp	30 Amp	2 x 25 Amp

Note: All features and specifications subject to change without notice

55