Input channel selector


New member
Username: 98lx

Post Number: 3
Registered: May-07
hey there. i have a 4 speaker system being powered by an alpine pdx 4.150. there is a switch for "input channel selector". there are three settings. (listed as they are in the manual):

a) Setting this switch to "1 + 3/ 2 + 4" will sum the CH-1 and CH-3 input and send it to CH-3 while the CH-2 and CH-4 inputs are summed and sent to CH-4.

b) Set this switch to "3/4" to have the inputs of CH-3/4 accept independent input signals. An example of this application would be the use of a head unit with dual pre-amp outputs.

c) Setting this switch to "1/2" will send the signal at the inputs of CH-1/2 to CH-3/4 of the PDX-4.150. This eliminates the need for
"Y"-adaptors when using a head unit with a single pair of pre-amp output.


there are 4 rca cables coming out of the headunit (two for the front and 2 for the rear). right now channel 1 is front left; channel 3 is rear left; channel 2 is front right; and channel 4 is rear right.

im not sure which of the three above settings i should use. any suggestions?
thanks again guys.

New member
Username: Jayem

Post Number: 5
Registered: Apr-07
You have two sets of pre-outs coming out of your head unit so use option B.

New member
Username: 98lx

Post Number: 4
Registered: May-07
thats what i was thinking too. thanks jayem. i appreciate your help.
« Previous Thread Next Thread »

Main Forums

Today's Posts

Forum Help

Follow Us