Hello. Eggy started off by saying that you can't get good sound out of speakers without an amplifier. Myself and the other member were trying to say that you don't necessarily need an amp to get quality sound out of a pair of speakers. A given hu's onboard amp is sufficient (at lower volumes obviously) depending on the speakers in question. The member that originally posted the init question has sony xplode coax from walmart as well as a noname hu from the same place. If he replaces the hu with a better quality unit, he will obtain much better sound, rather than just amping the signal that is coming out of his current hu and feeding that into the speakers. yes a HU will have an effect on SQ. so will the speakers. i bet you if he used that same HU with some better quality speakers(infinity,focal,soundstream pro series) he would get better SQ just from the speakers alone. just answer the questions: sony explod or Focal. which one would you choose? I would argue that a better signal fed to the speakers makes more difference than the speakers themselves. It's like listening to a radio vs. a cd...