want some genuine expert advice on classical music

[RAM_Designs 5,000+ posts]

I strongly recommend the Dayton Reference HF if a quality, "sq" sub at a good price is your preference. Sealed works great; 1.25ft^3 for the 10" and 2ft^3 for the 12" model works very well, won't require a ton of power, and won't cost an arm and a leg.