How many 4 ohm 12" r type subs can i run off a ALpine MRD-M500 amp?

[alpineman]

How many Alpine 4 ohm 12" r type subs can i run off a ALpine MRD-M500 amp?

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[kottonmouth 10+ year member]

well...it it is 1-ohm stable then u can run up to 4

 

[geezy21unc 10+ year member]

those amps i dont beleive are 1 ohm stable , jus 2 ohm. and you can run 3 @ 2.66 ohms, but it wont be getting enough power as say running 1 12"with recommend power

 

[80INCHES 5,000+ posts]

the only way u can wire 4 to those amps and get a 2ohm load...is to get the dual 4ohm coil type r's and wire them in series which will bring the speaker 2 8ohms and then wire all 4 in parallel and the amp will see 2ohms

80