In their jangliness 12-strings can flatter to deceive, but this O-5 has a genuinely buoyant, easy-sustaining sound, with an excellent degree of acoustic volume and cut-through that is partly attributable to the deeper-than-normal sides but is still very commendable for a mid-size instrument. The tone is bright, as you’d expect, but it's not harsh and the guitar responds sympathetically to different strumming positions – mellower over the end of the neck, more sharply incisive near the bridge.
Fired up the Prener proves a zesty unit, with plenty of gain and linked to a well-balanced inter-string piezo output. Like most lower-price systems the top end will sound brittle if pushed, and the Treble and Presence controls need reining back to offset the guitar's intrinsic sunniness. Conversely, the Bass slider needs a fair amount of boost to add warmth, and I found it desirable to adjust my amp’s EQ to help things along here. But that's the key: first tailor your backline to suit the preamp, and the Prener will then provide plenty of usable scope.