Pro-Logic DPL soundtracks VHS with DPL and DSS with the broadcast. Wait a moment let me say that: Paisley designed the first commercially successful bipolar speaker the Mirage M-1 in 197. If This is the case make sure that the receiver or a V-processor is set for large speakers left to right s. Crossover frequencies: 0Hz and 1.9 kHz. Frequency Range: 1Hz22kHz tolerance not specified. A soft dirt-free cloth and high-quality furniture polish should be used for this purpose.Pro-Logic DPL soundtracks VHS with DPL and DSS with whatever was being broadcast.Hold on a sec let me restate that: Paisley designed the first commercially successful bipolar loudspeaker the Mirage M-1 in 197.If so featured ensure that your receiver or A V processor is set for Large main left right speaker s.Crossover frequencies: 0Hz and 1.9kHz. Frequency range: 1Hz22kHz tolerance not specified .A soft dirt-free cloth and high quality furniture polish shall be used for this purpose.