sub not playing right

[shadowm891 2]

The deal is anytime i listen to the music in my car at low volume my sub woofer will some times not play as loud as it should at the volume my head-unit is set at. but when i turn the volume on the head-unit up half way it will start playing like it should at that volume.

 

head-unit - eclipse cd5030

amp - jl audio 300/2 v1

sub - sundown audio sa-10

[frogcase2002 393]

Where do you have your settings on the amp and head unit at? Have you checked all your wiring?

[gss 11]

sounds like a gain matching issue

[cloud77 28]

maybe rcas? whats the output ~V on the headunits rcas?

[jonbearsmt 919]

some  amps have  a RCA input turn on  mode.. it wont turn on unless you turn it up...

 

 you should be able to turn it to remote turn on.