False...depending on eletrical 2v preout does matter. maybe not an audible difference in the sence rather people tend to claim it sounds "cleaner". Yet low voltage pre-outs does not supply amps with nesseccary juice so amps tend to get hot. and amps dont like to be hot...clipping..blown channels..weather or not u set your gains properly there probably is a mild account of clipping even if you dont hear it depending on your eletrical. But anything better than 2v is better...amps all around enjoy 4-5v preouts or better.