Amplifier Issue

[Shahin Purple]

First post in this thread, I hope I do a thorough job.

Alright so I'm planning to use a car subwoofer AT HOME. I was planning on using the Renegade GTR1200 subwoofer. 300 watts RMS, 4 ohm impedence, comes with enclosure. The problem I have when buying an amp, (which is what I need advice with) is that amp as I am about mention mostly advertise at 600, or 400 watts, but then at 4 ohm impedence the only supply 300 watts. I'm talking about mono block amps. Now when this phenomenon occurs, are the manufacturers implying that if your subwoofer has 4 ohm impedence, and at 4 ohms the amp supplies 300 watts, and 2 ohms 600 watts, that if you hook up your 4 ohm sub going 300 watts the input to the amp has to be 300 too? Or does it still need to be 600? The amp I was PLANNING on using is the MB QUART FX1.600

600 Watt Monoblock Amplifier. As I said before it is 600 watts at 2 ohm impedenxe, and 300 at 4 ohm impedence. So is it ok if I supply the amp with 420 watts if the sub I'm using is only 300 watts and 4 ohms? Thanks a lot guys I really appreciate any kind of response I'm getting a bit desperate.

By the way, in case anyone is wondering, I'm using a 420 Watt, 12v power supply by Okia.

Click to read more...

 

[keep_hope_alive Premium Member]

No car audio amps in the house, the AC-DC power supply required would be several hundred dollars.

Buy a plate amp from PartsExpress or MCMElectronics. They are home audio subwoofer amps specifically designed for what you want to do. they come in a variety of wattages.

300W RMS at 4 ohms will be plenty.

 

[keep_hope_alive Premium Member]

Subwoofer Amplifiers, Plate Amplifiers, Home Audio/Video Subwoofer Amplifiers, Powered Subwoofer Amplifiers Perfect for Building Your Own Powered Subwoofer.

here is a nice selection

this one will be plenty

Dayton Audio SA240-B 240W Subwoofer Amplifier with Boost

and a bit better than this one (despite the rating)

Bash 300W Digital Subwoofer Amplifier

i know this because in a side-by-side test, the Dayton out performs it by a huge margain.

 

[Shahin Purple]

Thank you very much, I didn't expect such a detailed response haha. Can you please explain to me though why car amps dhould stay out of the house? I've seen people use power supplies and do it online like it was no big deal. Anyways thanks again.

 

[keep_hope_alive Premium Member]

A 50 amp power supply is a couple hundred dollars. It has several noisy fans and the power supply output isn't perfect DC. The receiver doesn't have a remote turn on out that the amp needs to turn on/off. The power supply has to be manually operated. Some receivers have a DC trigger that could be used as a turn-on with the power supply switch bypassed...

Lots of hassle, lots of noise, lots of money... And no advantage over a product designed to do the job. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Just because people do it, doesn't make it a good idea. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Shahin Purple]

Haha alright thanks again!