Infinity Reference 475a User Manual

To Head Unit
Front Output
To Head Unit
Rear Output
Rear SpeakersFront Speakers
Figure 5. 475a connected to full-range speakers. Note
crossover and channel assignment settings.
Figure 6. 475a connected to four satellite speakers
and used in conjunction with an additional
subwoofer amplifier or powered subwoofer.
Note crossover and channel assignment settings.
To Head Unit
Front Output
To Sub Amp
To Head Unit
Rear Output
Rear SpeakersFront Speakers
4
The 475a can be set up for stereo 4-channel,
3-channel or bridged 2-channel operation, as
shown in Figures 5 through 8.
NOTE:
s-INIMUMSPEAKERIMPEDANCEFORSTEREO
operation is 2 ohms. Minimum speaker
impedance for bridged operation is 4 ohms.
s.OTALLPOSSIBLEAPPLICATIONSARESHOWNHERE
e.g., the applications shown in Figures 5, 6 or 8
could include a separate subwoofer driven by
an additional amplifier. In that case, the user
should refer to Figure 6 for crossover and sub
amp connection suggestions.
APPLICATIONS – 475a

Infinity Reference 475a Specifications

General

Damping factor	6.3
Amplifier class	A/B
Frequency range	10 - 100000 Hz
Input sensitivity	100 mV
Built-in crossover	No
Audio output channels	4.0 channels
Peak power per channel	117 W
Signal-to-Noise Ratio (SNR)	85 dB
Total Harmonic Distortion (THD)	0.02 %
RMS power output per channel (2 Ohm)	90 W
RMS power output per channel (4 Ohm)	75 W
DC-in jack	Yes
Audio (L/R) in	21
USB 2.0 ports quantity	0
Speakers connectivity type	Clamp terminals
Purpose	Car
Material	Aluminum
Cooling type	Passive
Product color	Aluminium, Grey
Volume control	Rotary
Connectivity technology	Wired
Maximum current	72 A
DC input voltage	10 - 14 V

Weight and Dimensions

Depth	360 mm
Width	229 mm
Height	68 mm