Need helps from bros there. 1: sub come with JVC QP-F10 link http://www.jvc-asia.com/sg/products/dvddetails.asp?id=53 High-Efficiency PWM Digital Amplifier, Active, Bass reflex system Auto Power-On/Standby impedance: 4ohms, output of amp: 100w (50 Hz, 4ohms, 10%THD), Frequency range: 32 - 200 Hz Input terminals: Input (low-level) power handling: 27W mass: 8.86kg Dimensions (WxHxD mm): 185x374x385 2. sub come with Denon DHT-1356XP, link http://www.denon.co.uk/site/frames_...ppe_C=4&action=detail&Pid=258&main=prod&sub=1 Construction: Active, Bass reflex system Amplifier Output 50W (6ohms) / 100 W (Dynamic Power) Input impedance 22 kohms Frequency response: 30 - 200 Hz Bass chassis: 160 mm Weight: 9,2 kg Dimensions (WxHxD mm): 210x353x379 Jusdging from the specs, can anybody advise which sub is better? Is the first one much more powerful than the latter since its power is 100W, which is 2 times of the latter. But the first one has power handling of 27W, which does that mean? And the latter one has impedance 22 kohms, this 3000times of the latter!! what is the implication on the performance of the sub? Is it genearlly true that heavier speakers/sub are better?