Speaker linking hi, i have 4 8 ohm speakers , all 450 max, im running 2 per side, could i hook up a set of 500 max 8ohm bass bins and run 3 speakers per side? thanks guys paul

By putting three speakers in parallel your load impedance is 8/3
or about 2.66 ohms.
MOST amps have a minimum load of 4 ohms so you MIGHT damage the amp. AN additional consideration is that the sound output of the third speaker may be vastly different than the other two on that side. The energy MAY not divide btween the mismatched set the way you want.

You know, watts is a heat dissipation unit... It tells nothing about your speaker, the usage you wanna do with it, and what about the amp! Usually on proffessionnal amplifier ( i mean touring power amp) we rely 2 speakers in parallel per side of amp. It turns the amp working at 4 ohms and ifs it pushed by a good amp, and a reasonnable operator, things goes find. If amp ''clip'' it sending DC in the speakers and you actually in the way of a repair. So its now having too much power amp that usually breaks speakers, but too small amp. Check the specifications of what your amp can gives at 20hz to 20khz, both channel driven at 4 ohms. You find out that the amp you believe was sending you 500watts is giving you only 250... Thats why pro series of amp cost so much. Because they are not playing on words but giving power... Cheap series of pro amp counts wattages at 4ohms one channel driven at 1khz at 1% distortions wich is unnaceptable. 0.1% is the max acceptables. Go meet the tech at your local big touring sound contractor and ask for the real thing. You'll get the right answer and analysis of your kit...