I recently ended up with a pair of TDL RTL2s for $100, seemed like a good deal, so I bought them. My other speakers are Royd Apex. Being that I have virtually no experience with audiophile matters, I have an idea for getting a more extended bass using the TDLs as a sub, looking for someone to tell me this is a stupid idea really. So the initial plan is to put a crossover in between the amp and speakers, so I can output frequencies below, say, 50hz to the TDLs and leave the Royds to do the rest. Has this been done before? If so, or not, would it work??