Hertz H420

4 Channel Car Amplifier in the same series as the Hertz H230.

Hertz H420 Specs
Max Dynamic Power 600 Watt
Nominal power
4 Ohm @ 12V
50 Watt + 150 Watt
RMS Watt @ 13.8V 4 x 75 Watt (4 Ohm)
4 x 100 Watt (2 Ohm)
2 x 75 Watt (4 Ohm) + 200 Watt Sub (4 Ohm Bridged)
2 x 100 Watt (2 Ohm) + 200 Watt Sub(4 Ohm Bridged)
Inputs 4 Pre-in RCA.
Selectable 2/4 channel input.
High Level Input
Crossover Front:
Full Range
Hi-pass 40 Hz - 150 Hz 12dB/Okt.
Low-pass 40 Hz - 150 Hz 12dB/Okt.

Rear:
Full Range
Hi-pass 40 Hz - 150 Hz 12dB/Okt.
Low-pass Mono 40 Hz - 150 Hz 12dB/Okt.
Measurements/Size (mm) 225 x 55 x 360 (W x H x L)


Hertz H420 Amplifier Top
Hertz H420 Amplifier Inputs
Hertz H420 Amplifier Outputs


Sources:
https://forum.mariohifi.it/index.php?topic=40356.0
http://www.zesiky.com/?723,hertz-h420
http://amp-performance.de/1020-Hertz-H420.html (more photos)