Does anyone know if there is any disadvantage to using a Z-Matcher in terms of tone or volume loss through a cabinet? I have a 4 ohm cab and an 8 ohm cab. I want to run both through a 4 ohm load amp head. This Z-Matcher sounds perfect to me. Are there any drawbacks to using a Z-Matcher to do this? (I know its safe, I just want to know in terms of effect on tone and volume, if any). Any thoughts would be appreciated. Thanks all!