I'll admit, I've been out of the car audio scene for a long time. When I purchased my Impreza, 6+ years ago, I had gone more towards performance parts/autocross than audio... anyways.
I have a 4 channel Alpine amp that I bought a couple months after I bought the car - along with 4 way Pioneer 6.5" in the front doors and Alpine 6.5" in the back. (It's a half assed system... Pioneers focus more on the higher end freq of the sound and the Alpines in the rear deck provide lower/midbass) -- and I do not have a sub with this setup. Can't stand trunk rattle and also didn't want the added weight.
Anyways; tonight on my way home from work there was a mild pop through all four channels - then the sound cut out - and then sound came back. All in all, the total experience lasted about 1 second. When the music came back on everything seemed fine. I wasn't playing the system loud, hardly audible actually but tonight when I was cruising around town I noticed that it seemed like the music was ... diluted? For lack of a better word. Almost like it was watered down, hardly any midbass but the highs were there. I spent about 20 minutes diagnosing and scratching my head - and realizing that I have no idea wtf happened. I'm thinking it's an issue with the amp... but I'm on a very tight budget right now and before I go messing around and buying stuff I don't need I was hoping to get some feedback from some people on here to see what you guys think.
tl;dr - watered down/diluted bass/midbass sound from all four speakers in my car after a one second pop/loss of sound/audio coming back. Need suggestions on cause.
Thanks for reading.