September 27, 2009 - 1:17 pm
Ok hopefully my final question!
I decided to go with the Rockford Fosgate - Punch 12" 4-Ohm Dual Subwoofers with Enclosure - Black/Silver
Now (remeber im new to car audio) what kind of amp should i get for this sub?
Here are the product features for Sub:
# Includes two 12" subwoofers and a dual subwoofer enclosure
# Handles up to 500W peak power (250W RMS)
# High-modulus closed conical polypropylene
# Die-cast aluminum motor cover
# Vented enclosure
# Double-stacked magnets
# High-flow, low-noise port design; wired for the included subwoofers
# Frequency response: 26Hz-250Hz
# Impedence: 4 ohms
# Sensitivity: 86dB
Here are some amps im looking at:
1)Rockford Fosgate - Punch 600W Class AB Bridgeable 2-Channel Amplifier (http://www.bestbuy.com/site/olspage.jsp?skuId=8266388&st=+P200-2+amp&lp=1&type=product&cp=1&id=1170289781181)
* 600W peak output @ 4 ohms, bridged
* 600W peak output @ 2 ohms
* 300W peak output @ 4 ohms
* 200W RMS (continuous), bridged
* 200W RMS (continuous) @ 2 ohms
* 100W RMS (continuous) @ 4 ohms
* Adjustable 40-400Hz crossover
* Dynamic Thermal Management prevents overheating
* Bass boost; on-board Punch EQ
* 4-gauge power and ground input
2)Sony - Xplod 500W Bridgeable Multichannel Amplifier
(http://www.bestbuy.com/site/olspage.jsp?skuId=8383714&type=product&id=1179165803051)
* 500 watts peak power
* 50W x 4 RMS power @ 4 ohms, <1% THD
* 95W x 2 + 250W x 1 @ 4 ohms
* 80Hz high-pass/low-pass filter switch
* Frequency response: 5Hz - 100kHz (+0/-3 dB)
* Signal-to-noise ratio: 90dBA
* RCA and speaker level inputs
* Blue LED lighting provides gentle illumination
* Slim design easily fits in tight spaces
Will these amps work with the subs? Recommendations for other amps?
The only power figure that is really meaningful is the one for RMS. Both of the amps you have links to are great amps. The Rockford-Fosgate would be a good choice to power just your front speakers. The Sony to power both front and rear. Neither of them are very good at powering subs. Subs need a lot of power. And look at the Rockford-Fosgate bridged RMS rating - 200 watts - that’s only 100 watts per sub (they will share the power). They will just barely make a noise with 100 watts. And the Sony isn’t suited to powering subs even as a sideline. It appears that 2 of the channels can be bridged to produce 250 watts but what are you doing with the other channels? It’s just wasted.
So you have subs with a power handling capability of from 100-500 watts RMS (2 subs each power range 50-250 watts). The more watts within the power range that you use to drive them, the louder they will play.
For subs, your best choice for power, cost, and installation will be a dedicated subwoofer amplifier, commonly referred to as a monoblock. The monoblock operates as a Class D amplifier which is more efficient and ultimately less costly.
You can buy the Rockford-Fosgate amp online at www.crutchfield.com for $197.99. The Sony for $199.99. With either of these, your subs will be driven at less than half of their potential volume. Here is a better amp cheaper (Alpine MRP-M500)
http://www.crutchfield.com/p_500MRPM500/Alpine-MRP-M500.html?o=m&showAll=Y&tp=115
It’s $20 less ($179.99) than the multichannels and provides a full 250 watts RMS to each of your subs. I can guarantee you that if you drive your subs with either of the linked amps, you will be disappointed.