(Kenwood P-W1221) KAC-5207 2-Channel Amplifier + 2 12" KFC-W112S Subwoofers
Kenwood Party Pack
Two KFC-W112S 12" 8-ohm subwoofers
- injection-molded polypropylene woofer cone with high-roll urethane surround
- black stamped-steel basket
- power range (per sub): 50-200 watts RMS (700 watts peak power)
- frequency response: 28-800 Hz
- sensitivity: 90 dB
- top-mount depth: 5-9/16"
- sealed box volume (per sub): 1.25 cubic foot
- ported box volume (per sub): 1.5 cubic feet
- warranty: 1 year
KAC-5207 2-channel amplifier
- 70 watts RMS x 2 at 4 ohms (85 watts x 2 at 2 ohms)
- 170 watts RMS x 1 bridged at 4 ohms
- CEA-2006 compliant
- Class AB design
- switchable low-pass filter (80 Hz, 18 dB per octave)
- preamp and speaker-level inputs
- fuse rating: 25A x 1
- wiring and hardware not included with amplifier
- 10-gauge power and ground leads recommended
- dimensions: 9-1/16"W x 2-3/16"H x 6-9/16"D
- warranty: 1 year
Amplifier Power Specifications
The RMS power rating is the measure of continuous power that an amplifier can output, or a speaker can handle. It is the most accurate depiction of real, continuous power that the industry has so far.
If the final impedance of your speakers or subwoofers equals 2 ohms, this is how much power this amplifier will supply at that ohm level. The higher the RMS wattage, the more clean and loud your music will sound.
Bridging refers to combining two channels on an amplifier to create one channel with double the voltage and an increased power output. A 2-channel amplifier will bridge down to 1-channel and a 4-channel amplifier can bridge to create 2-channels. An amplifier is most commonly bridged to drive a subwoofer.
Remember, once you bridge two channels down to one its final impedance will be 4 ohms unless otherwise specified. This rating lists the RMS power created once an amplifier is bridged.
An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.
Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.
Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.
The RMS power rating is more accurate, and we recommend using it for product comparison.
RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.
The RMS output figure is much more accurate than the peak rating when comparing products.
- RMS Power
- Signal-to-Noise Ratio
This rating applies to both external car amplifiers, as well as the amplifiers inside of in-dash stereos.
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
Sealed: These enclosures completely enclose the air inside the box. These boxes produce a tight bass.
Ported/Vented: These enclosures have a slot of air to escape from the box. The result is a sound that has more "boom".
Bandpass: These are a combination of both sealed and ported enclosures. They can be very efficient, but require tuning for the best response.
Specials with this Item
Warranty and Return Policy
Thicker than the competition, complete sound damping kit for entire vehicle! Use for trunk, doors, roof and floor.
Your Price $99.95
Did you know sound dampening will reduce those annoying rattles and even increase your SPL?
Your Price $287.99
Stinger's Roadkill sound dampening series is sure to kill unwanted road noise and rattles! Enough sound dampening for the whole car!
Your Price $105.99
Universal rubber roller to make it easy to install sound dampening.
Your Price $7.99
Internal Product ID
Wiring Diagram Legend
Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.