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About Brian
Expertise
I can answer questions about car audio installation, including head units, amplifiers, speakers, subwoofers, mobile video systems, GPS navigation, hands-free kits, alarm/remote start, troubleshooting, OEM integration, installation tools and methods, and more.
Experience
I have been a professional car audio installer for several years.
Education/Credentials
I currently hold a Master Installer certificate from the Mobile Electronics Certified Professional (MECP) program. This is the highest level of certification. I have been MECP-certified at various levels since 2001.
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You are here: Experts > Autos > Auto Parts > Car Stereos > subwoofer and amplifier
Car Stereos - subwoofer and amplifier
Expert: Brian - 11/6/2009
Question
Hi Brian. Will a Powerbass ASA 1500.1DX mono subwoofer amp set at 325 rms x 1 channel 4ohms, power 2 Pioneer Premier TS-SW 1241D 12 inch shallow mount subwoofers. The subwoofers are rated at 350 rms at 4ohms. How much power would each subwoofer receive. Or do I need a different amplifier. Thanks George
Answer
Hi George,
Keep in mind that when you combine two 4-ohm, single voice coil subwoofers like the TS-SW1241D, you'll end up with a 2-ohm load. The relevant amplifier power rating isn't the 325-watt, 4-ohm rating. When used with a 2-ohm load, your amplifier is rated for 750 watts RMS.
The power produced by the amp will be evenly divided between the two subs; at the maximum RMS output, each sub gets 375 watts. This makes your amplifier a fairly good match for the 350-watt Pioneer subs. I think you could certainly blow the subs with this amp, if you're not careful; so be sure to set the gains with care, and don't abuse the system. For normal music listening, it should be fine.
Hope this helps!
Brian
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