You want better bass. Then go directly ARC 600s or Atmos-phere MA II mk IIs. Don't add a subwoffer. Even the best always muddy the watters. Put that $4K into tube better amps that will improve you overall sound. You're chasing the wrong horse. Maybe VAC 750 signatures amps would provide a nice combination for you.
Sub-woofer to go with WATT3/Puppy2
Question1: What sub-woofer would be recommended for the above speakers for use in the following systems: - Audio Research LS5mk3 / LS16 pre - Krell FPB200 amp The speakers are just too dry in the bass and the bottom octave is not fully there. I want to avoid buying WA own sub (the WHOW). Budget max $4000. I consider building it since I have good skills of woodwork and electronics. Question2: what would the recommended cut.off frequency be (and x-over order), if I don't cut the input to the WATT/Puppy? Many thanks