Tweeter no sound after replacing HU, Using 4ch amp

[bennychen]

Hi everyone,Previously i am using JVC KD-G396 with 1 pair RCA out, after replacing this HU with Pioneer DEH-3050UB with 2 pair RCA out, my component set tweeter is very soft and almost no sound but i already on the volume very loud and my 6x9" speaker is working normal, btw i am using 4 channel amp.And one more question, why when the bass hit my player light and all the room lamp will dim and if i on louder then once the bass hit then the speaker will no sound when the bass hit..my car has not enough power? And when my player i playing song. i on my HID fog lamp then the speaker will cut off..then i need to off the player and on it again only got sound..Please help me solve my problem, thanks :wink:

 

[affan66]

if no sound during loud bass notes, that means the amp clipped (amp shut down temporarily).

This is clearly a power problem. Since you changed HUs, it could be that the RCA is running on different voltage 2 Volts / 5 Volts / 7 Volts, depending on HU. I believe the Pioneer runs on 5V. The gain setting at the amp needs to be adjusted to suit the output from the HU. You can do this manually but having the right tools will give you better tuneability.

BTW, are you connecting the 4 channel amp, with 2 channels to the mid/tweets and the other 2 channels to the 6x9? How was it connected before? I think your amp ran out of juice already.

 

[bennychen]

yes i am connecting 2 channels to component set in front and another 2 channel to 6x9" speakers behind