The biggest fix for room acoustics? Open the windows! Of course, you'll have to live on a Midwestern farm or have very tolerant neighbours :-) But it does usually work wonders for eliminating standing waves.
You can also weigh up the cost/benefit of spending $2000 on a used TACT (or alternatively the RIVES) unit or spending the same money on some high WAF room treatments like heavier drapes or a couple of new couches or wall hangings.
You can also weigh up the cost/benefit of spending $2000 on a used TACT (or alternatively the RIVES) unit or spending the same money on some high WAF room treatments like heavier drapes or a couple of new couches or wall hangings.