Genesis,
Tell me your Dunlavy speaker, and I can give you the values for each driver. These networks go directly across the driver's speaker terminals. This is a 5 minute mod per driver (once they are removed, which you can soncially evaluate for yourself by doing only one speaker and comparing to the other.
In terms of doing research, you'll find more mis-information than good information on zobels. Where most people get confused is that a cululitive crosssover zobel circuits are much different than individualized zobel circuits wired across each and every speaker driver. Individualized zobel circuits are implemented to correct the phase angle shift that occurs at the speaker driver due to the inherent inductance within a speaker's voice coil. Once this phase angle is reduced by using this zobel circuit, the interaction between that driver and the amplifier is improved, which in turn improves detail and control (soncially).
The circuit that I am describing is a true "win-win" implementation, with no sonic or electrical downsides. It amazes me that more speaker manufacturers don't use these circuits. When you hear a pair of Dunlavys or Pipedreams improved (by their owners who implement these circuits) you start to wonder what else the speaker designer missed! In my experience there are MANY "Class A" rated speakers that can be improved upon with tweaks such as this.
