Digital Signature’s new Mint Studio iPod dock may not look all that different than the company’s previous Mint 130 model on the outside, but it’s gotten a few fairly significant upgrades to its internals, which was enough to get us interested in it again. The biggest of those are some improved wireless capabilities, which still rely on the same tried and true 2.4GHz band as before, but promise an increased range of up to 100 feet (up from 45 before), and less interference from other devices thanks to some new channel-hopping technology. The real kicker, however, is that the wireless transmitter is able to support up to three of the systems simultaneously, making the Mint Studio a cut-rate multi-room audio solution of sorts — although anyone looking for anything close to Sonos-level functionality will want to look elsewhere. Read on for our full impressions.