Unless you listen too pipe organ music. A sub that reaches into the mid 20 hz region would satisfy most. As someone has stated earlier..the room does play a factor in extention. I use dual stereo 12 inch subs and have measured flat to 30 hz easily in my room at 70 to 75 dB. Meaning I still get down to 20 hz minus maybe a few dB without touching the volume knob.
I would imagine, most instrumental recordings don't get much lower than 35 to 40 hz on average. The woofers excursion plays a roll as well in frequency extention.The Adire XBL and Shiva drivers are some of the best around. Acoustic Vision subs. I'm willing to bet any one of these units will meet or exceed any boutique brand out there in overall performance. It's up to you if you want to pay the boutique prices. Look closely and you will notice the same parts used between these two companies.Just different finishes and cabinet thickness. Adire Rava II.
I would imagine, most instrumental recordings don't get much lower than 35 to 40 hz on average. The woofers excursion plays a roll as well in frequency extention.The Adire XBL and Shiva drivers are some of the best around. Acoustic Vision subs. I'm willing to bet any one of these units will meet or exceed any boutique brand out there in overall performance. It's up to you if you want to pay the boutique prices. Look closely and you will notice the same parts used between these two companies.Just different finishes and cabinet thickness. Adire Rava II.