It seems, AQ Volcano is replace by AQ Oak. Retail price wise, they are similar as well as their wire structure being all PSC+. AQ used to provide more details about their cables like AQ Volcano, but for some reason they stopped doing as such.
http://www.audioquest.com/pdfs/earth_feature/volcano.pdf
There is also, AQ Comet (almost same cost) but this one uses 1/4 silver PSS and 3/4 psc+.
I have a pair of AQ Volcano which is a much thicker cable compared to AQ Oak and AQ Meteor (that I use on my primary setup), perhaps because of its higher no.of RFI insulation layers.
hope that would help.
cheers.
http://www.audioquest.com/pdfs/earth_feature/volcano.pdf
There is also, AQ Comet (almost same cost) but this one uses 1/4 silver PSS and 3/4 psc+.
I have a pair of AQ Volcano which is a much thicker cable compared to AQ Oak and AQ Meteor (that I use on my primary setup), perhaps because of its higher no.of RFI insulation layers.
hope that would help.
cheers.