I believe there are a couple of issues with subwoofers in a 2 channel configuration.
First, many people don't purchase subwoofers that match the sound quality of their main speakers so it's essentially putting a $200 bass driver in a $3,000 speaker (just an extreme example). The salesman at the store that I deal with indicated that the current JL Audio subwoofer were on the short list of "audiophile approved" subwoofers and is about all they have in the store for the high end customers.
Second, every amplifier has its own sound and if an active subwoofer is used it isn't likely that it will perfectly match the sound of the main speakers. An audiophile isn't likely to hook up left and right channel speakers with different mono-block amplifiers and many, I suspect, wouldn't bi-amp speakers with different amplifiers either.
In my case, my receiver forces me out of direct mode to use a subwoofer so for 2-channel critical listening the best configuration is two full range speakers. My Focal 836v speakers can reproduce 30 hz, but not at a loud enough volume to support home theater applications. I have a subwoofer that isn't an equal with my main speakers, but does a wonderful job of the .1 duties and for heavy bass non-critical listening.
First, many people don't purchase subwoofers that match the sound quality of their main speakers so it's essentially putting a $200 bass driver in a $3,000 speaker (just an extreme example). The salesman at the store that I deal with indicated that the current JL Audio subwoofer were on the short list of "audiophile approved" subwoofers and is about all they have in the store for the high end customers.
Second, every amplifier has its own sound and if an active subwoofer is used it isn't likely that it will perfectly match the sound of the main speakers. An audiophile isn't likely to hook up left and right channel speakers with different mono-block amplifiers and many, I suspect, wouldn't bi-amp speakers with different amplifiers either.
In my case, my receiver forces me out of direct mode to use a subwoofer so for 2-channel critical listening the best configuration is two full range speakers. My Focal 836v speakers can reproduce 30 hz, but not at a loud enough volume to support home theater applications. I have a subwoofer that isn't an equal with my main speakers, but does a wonderful job of the .1 duties and for heavy bass non-critical listening.