I am about to build a ported speaker. The manufacturer of the woofer (Vifa) recomends enclosures 40-100 liters. How do I pick which volume I would preffer? Is bigger best for sound? Is smaller for apearances? Bass vs. transient responce? I have put off building the speaker for some time trying to reach a decission. Have the drivers, x-over, wood and all... They are for music in a 2- channel system.