It i were to get 2 of these what kind of amp should i get?

Lots of flexibility with 2 of these subs, can be wired in different configurations. Check amp prices and decide how much power you want to buy. Quick answer: an amp rated from 375 watts to 750 watts at 1 or 4 ohms can work. I would recommend a 750 watt 1 channel dedicated amp sub that can operate a 1 ohm load. Important to keep power rating and resistance matched. Here is a good read that explains how to match subs and amps: http://www.crutchfield.com/learn/how-to-match-subwoofers-and-amplifiers.html?pg=3&c=3

Would it be safe to pair this with a pioneer sub? One went out so I’m debating weather I should replace both or just the blown sub.

It really depends on how it’s wire....if you running separate channels per subwoofer as long they the same impedance it shouldn’t make a difference....But the sound quality I think will be different....with the spec(rms power... frequency etc.)between the two subs. Personally I wouldn’t never run two different manufacturers subwoofers in the same box with the same amp.This a $50.00 per woofer...so it not gonna break the bank.....

Any suggestions for a good amp to get 500 watts out of each of the subs?

Sorry, no. I have had a hard time with mine. I have a 1000 watt amp so it seems to give the speakers too much, after vol25 the subs start to randomly cut out bass. :(

If i get to of these can i run them at 2 ohms on a 1500 watt amp?

No. This is not good for two reasons. 1.) You can't wire 2 of these subs to get a 2 ohm load (you could wire 2 R2D2-12s, but see problem#2). I rely on the Rockford Fosgate website wiring wizard (http://www.rockfordfosgate.com/Support/WiringWizard.aspx) for help setting up my sub-amp combos. The wizard says two of these subs can be wired for either 1ohm or 4 ohm configurations. You could wire ONE of these subs for a 2 ohm load, but that leads to problem #2 - way too much power for one of these subs. Also too much for two of these subs w/ 500 watt peak rating. Check out Crutchfield for some help matching amp power to subs (http://www.crutchfield.com/learn/how-to-match-subwoofers-and-amplifiers.html?pg=3&c=3). Keep digging, good luck!

ASIN	B004M67FEW
Audio Driver Size	12 Inches
Audio Driver Type	Dynamic Driver
Best Sellers Rank	#218,855 in Electronics ( See Top 100 in Electronics ) #1,132 in Car Component Subwoofers
Color	Black
Compatible Devices	Smartphone, MP3 Player, Laptop
Control Method	Voice
Customer Package Type	Standard Packaging
Customer Reviews	4.2 4.2 out of 5 stars (357)
Date First Available	February 3, 2011
Global Trade Identification Number	00780687332563
Impedance	4 Ohms
Included Components	(1) Prime R2 Series Subwoofer
Is Discontinued By Manufacturer	No
Is Waterproof	False
Item Weight	9.12 pounds
Item model number	R2D4-12
Manufacturer	Rockford Fosgate
Material	Polypropylene, Metal, Plastic
Model Name	R2D4-12
Mounting Type	Car Mount
Number of Items	1
Other display features	Wireless
Power Source	Corded Electric
Product Dimensions	7.5"D x 14.75"W x 14.75"H
Recommended Uses For Product	car
Series Number	2
Shape	Rectangular Prism
Speaker Size	12 Inches
Speaker Type	Subwoofer
Special Feature	Optimized for both sealed and vented enclosures
Special features	Optimized for both sealed and vented enclosures
Style	4-Ohm
Subwoofer Connectivity Technology	Wired
Subwoofer Diameter	12 Inches
Surround Sound Channel Configuration	2.1
UPC	780687332563
Unit Count	1.0 Count
Warranty Type	Limited
Wireless Communication Technology	No Wireless Communication Technology
Woofer Diameter	12 Inches

R2D4-12 Prime 12” R2 4-Ohm DVC Subwoofer - 250 Watts RMS / 500 Watts Peak

Details

Description

Specifications

Common Questions