Hi All, I'm mulling over these 2 brands. Audison APBX DS10 (4 + 4 ohms, 400 RMS, no frequency response numbers) or JL Audio CS110TG-TW3 (400 RMs @ 2ohms, 24 to 200 Hz)? Anyone has experience in either of these subs? Thanks. I have Audison monoblock AP1D 540 RMS 2 ohms. Also, why is audison rating 4 + 4 ohms?