Yeah, flipping the polarity on the speaker leads will fix that.
Inverting and normal outputs are very handy to have on preamps because they also make for an easy means to bridge the two channels of any stereo amp (that does not inherently have bridging capability).
Inverting and normal outputs are very handy to have on preamps because they also make for an easy means to bridge the two channels of any stereo amp (that does not inherently have bridging capability).