I am hooking up a 550W car audio amplifier to two marine batteries, how long will the batteries last?

Sunday, September 18th, 2011 at 3:29 pm

Question by Kickin Faces.
This setup is for a mobile radio with 4 6×9 and a Kenwood 35×4 Car CD player. It ran last year for about 20 hours with the 2 batteries and no amp. I just want to see if anyone can give me a guess as to how long it will last with the 500W amp.

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Picking out the Right Kenwood Car Audio Amplifier

Article by Bob Montoya

After working with car sound clients for quite a while, it is obvious many have difficulty in choosing the right power amplifier for their sound system. By following these easy steps, the consumer can cut through all the buzz and miss-information that can drift throughout the retail mobile entertainment field. Although there are many high quality power amplifiers available, I have found most will certainly select a Kenwood car audio amplifier because of the good reputation, their power and cost.The first step you ought to take is to decide upon or get subs or speakers. This particular approach can also work well since your speakers or sub woofer choice is likely to be effected by certain size and space restrictions. This is also an excellent first step since it enables you to have the speaker specs at your fingertips before searching for an amp. Check the spec sheet and see exactly how much power is advisable to receive top rated efficiency out of your speakers.The 2nd step is usually to determine exactly where you’ll install the amp. You’ll want to pick an area which will allow you to mount your amp safely and securely and which allows for satisfactory air flow. All sizes of power amps will generate heat which means this can certainly provide a challenge. In traditional autos a car trunk is normally the very best spot although in pickups or SUV’s it’s likely you have to choose a location beneath a seat. Your own install location will establish the maximum size amp you may consider.The third step should be to figure out how you might wire your speakers or subwoofer since that will limit your research down due to the the amplifier’s configuration. There’s many different 2 channel or four channel Kenwood car audio amplifiers designed to power either pairs of speakers or a subwoofer. But in most cases, the best choice for any sub woofer set up would be a Rockford Fosgate class-D amplifier. When contemplating the power, a very good rule to follow is to power an amplifier at 80% to 90% of what they are designed for. This will likely supply the best quality sound through the car speakers along with a good extended life from any amplifier. You ought to evaluate any specific amplifier’s output capability at 4 ohms given that in many installations, you’ll be creating a 4 ohm setup. If you are simply putting in a subwoofer, then look at your sub to find out what is the lowest ohm setup achievable and then match a mono amplifier to that level. When viewing an amplifier’s capability, look at the specific output at RMS or continuous power ratings and don’t take into account max power. It has become an industry wide a style of advertising and marketing to pay attention to max power which allows stores to market various amplifiers as being more powerful then they really are. Evaluating the continuous power delivers a much better reflection of the way the amplifier will be used.For most installs, it is a good idea to power one pair of speakers using a stereo-amp and 2 sets of full-range speakers with a four channel amplifier. This will give you much better control when setting up your amp. If including a subwoofer to the system, you can actually very easily add a mono class-D amplifier. Keep in mind there are several different ways to wire speakers and amplifiers but this straight forward way is certainly the most popular and typically will give the best results. If you want additional guidance in choosing the proper Kenwood amp, you should definitely click thru and visit our web site.

Package: Pair of Brand New Kenwood Kfc-1662s 360 Watts Combined (180 Each) Powerful Full-range 3 Way Car Audio Speakers + Pair of Brand New Kenwood Kfc-1362s 300 Watts Combined (150 Each) Powerful Full-range 3 Way Car Audio Speakers
360 WATTS TOTAL PEAK OUTPUT
Frequency Response: 35-22,000 Hz
1 13/16″ balanced PEI dome tweeter
Power Handling: 150 Watts Each
Woofer: 5-1/4″ Silver Mica Injection-Molded Polypropylene Cone
PACKAGE: PAIR OF BRAND NEW KENWOOD KFC-1662S 360 WATTS COMBINED (180 EACH) POWERFUL FULL-RANGE 3 WAY CAR AUDIO SPEAKERS + PAIR OF BRAND NEW KENWOOD KFC-1362S 300 WATTS COMBINED (150 EACH) POWERFUL FULL-RANGE 3 WAY CAR AUDIO SPEAKERS
Features:
Power Handling: 180 Watts Each
360 WATTS TOTAL PEAK OUTPUT
Size: 6 1/2 OR 6 3/4″
3 way spekaers
Dimpled Woofer Cone
Sensitivity: 92 dB
Frequency Response: 35-22,000 Hz
Impedance: 4 ohms
cloth surrounds
Ferrite magnet structure
steel basket
shallow mounting depth
Magnet Weight 6.3 oz.
.5″ ceramic dome tweeter
1 13/16″ balanced PEI dome tweeter
Metal Net Grille: 3-Spoke
Mounting Tabs for Installation in GM Vehicles 6-3/4″ Holes
top-of-the-line piezo Tweeter
Woofer: 6-1/2″ Silver Mica Injection-Molded Polypropylene Cone
Mounting depth: 1 11/16
Power Handling: 150 Watts Each
300 WATTS TOTAL PEAK OUTPUT
Size: 5.25″
3 way spekaers
Sensitivity: 91 dB
Frequency Response: 40-22,000 Hz
Impedance: 4 ohms
cloth surrounds
Ferrite magnet structure
steel basket
shallow mounting depth
.5″ piezo tweeter
1 13/16″ balanced PEI dome tweeter
Metal Net Grille: 3-Spoke
Mounting Tabs for Installation in GM Vehicles 6-3/4″ Holes
top-of-the-line piezo Tweeter
Woofer: 5-1/4″ Silver Mica Injection-Molded Polypropylene Cone
Mounting depth: 1.75″
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List Price: $ 59.99