Hi, please i need some help!
I bought some the K4700 Boards to protect my ICEPower 500a and 250a Amps. The Amps are Bridge Amplifier with asymetrical 75V/48V power supply.
http://www.icepower.dk/files/solutions/icepower500adata.pdf
http://www.icepower.dk/files/solutions/icepower250adata.pdf
On page 11 of the Manual is written:
[color=#BF0000]Realise the following connections:
MAINS: this connection has to be linked to the NET-connection of the transformer in the amplifier, i.e.
AFTER the net-switch!
PA: connect this point to the speaker-output of the amplifier, respectively for the left and the right signal (fig
5.0). In case a bridge-amplifier (fig 6.0) is being used, there ought to be two “hot” connections here.
MASS: this point has to be connected to the mass of the amplifier.
LS: to this point the left resp. right loud speaker is to be connected.
To disconnect the loudspeakers manually, realise the following connections:
Install a switch between the points -V and MAN; when the switch is shut the speakers will be disconnected
permanently, when opening the switch again after approx.+/-6 sec the speakers will be reconnected as well.
REMARK. In case of amplifiers with asymmetrical power supply (i.e. having output-elcos and the resistances
R23 to R26) of more than 300W/4 Ohm or 150W/8 Ohm, it is not recommandable to disconnect the
speakers at full power during a longer period, because the just mentioned resistances could burn. In case
the protection module is being used on a bridge-amplifier with asymmetrical power supply, the diodes D7
and D8 should not be mounted; in this case the DC-protection should not be functioning anymore because
the voltage-reference of the protection-module is now opposed to the mass.[/color]
Do i understand that right, that i´m not able to use the dc protection of the k4700 board because i have to remove the D7 and D8 diodes?
In my case i don´t need to diconnect the loudspeakers manually.
Sorry for my bad englisch 
Thanks!
Max