Best Kenwood Amplifiers

Kenwood Home Audio Power Amplifier:

The Kenwood Home Audio Power Amp was introduced in 1959. Its design is based on the idea of “power amplification” and it is intended to provide high sound quality at low volume levels.

The amplifier’s output level can reach up to 3 watts RMS (0 – 15 dBuV) with a maximum input voltage of 12 volts DC. It is equipped with a rotary control switch labeled “Power On/Off”. When the switch is turned to ON position, the amplifier turns on and when it is turned off, it shuts down.

In addition to its power amplifier function, Kenwood Home Audio Power Amp features are:

Push button remote control;

Two speaker outputs;

Three pairs of inputs; and,

Four sets of controls.

The Kenwood Home Audio Power Amp is available in two models: Kenwood KA-100 and KA-200. The KA-100 model is a four channel amplifier with a maximum output power of 100 watts RMS (75 watts peak).

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It has three pair of inputs, one set of balanced XLR outputs, and four sets of controls. The KA-200 model is similar to the original model but has six channels instead of four. In addition to these features, the KA-200 has two sets of unbalanced RCA inputs and two sets of controls.

Other information concerning the amplifier’s specifications are provided upon request.

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Kenwood KA 8060 Car Amplifier

As a follow up to the huge success of the Kenwood KA-3500, Kenwood released the 8060. The 8060 was a 1 x 60 watt RMS mono block amplifier.

It was essentially two KA-3500’s in a single rack mount chassis. The amplifiers were popular in disco clubs and with OEM auto installation companies.

The 8060 uses a MOS-FET input stage and a MOS-FET switching output stage. The 8060 will handle 2 ohm mono blocks loads.

The amplifier is rated at 60 watts RMS per channel, but if you buy two of them, it can provide up to 120 watts RMS in bridged mode. The amplifier uses a single 10 inch fan to cool the entire unit and is built very well. The build quality of the amplifier is very high and it can easily be used in professional applications.

The Kenwood KA-8060 is no longer in production, but out-of-production items and NOS parts are still readily available. The KA-8060 sells for around $600 used on eBay.

A new KAC-9102 II will provide similar performance and is only $200.

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Kenwood Car Amplifier KAC-7004

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The Kenwood KAC-7004 is a 200 watt x 4 channel class D car amplifier with built in MOS-FET signal processing. The amplifier has built in protection circuits and also features Kenwoods patented “Ultra-Poweer” technology.

The KAC-7004 is capable of running four full range speakers or two full range speakers and one subwoofer.

The ultra-Power technology uses a MOS-FET design to control the supply of power from the power supply to the amplifier channels. The MOS-FET design also increases the overall power efficiency of the amplifier.

The ultra-power technology increases the power supply capacity, while decreasing the size of the power supply. The KAC-7004 is one of the most power efficient 4 channel amplifiers on the market.

The KAC-7004 delivers 100 watts RMS per channel at 4 ohms impedance and 50 watts RMS per channel at 2 ohm impedance. The amplifier also delivers 200 watts RMS at 4 ohms in bridgeable configuration.

The signal to noise ratio is 90 dB and the top frequency response is 50 KHz.

The KAC-7004 uses a class D ultra-high speed switching power supply. The amp uses a MOS-FET input stage and a class D output stage.

The KAC-7004 uses a high current BTL outputs, (Bridge Tie Load). This design is excellent for subwoofers and requires only a single feed from the head unit. The amplifier can support 4 ohm speakers and is also rated to operate in temperatures as low as -40 C.

The KAC-7004 comes with all of the connectors you need to install the amplifier. The amp comes with one pair of RCA inputs and one pair of RCAs for power and speaker output.

The amplifier also comes with two sets of speaker wire terminals that allow you to easily add aftermarket speakers.

The Kenwood KAC-7004 is no longer in production, but out-of-production items and NOS parts are still readily available. The KAC-7004 is incredibly popular and used by many car audio installers.

The KAC-7004 sells for around $600 used on eBay.

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Kenwood Car Amplifier KAC-9102

The Kenwood KAC-9102 is a 400 watt x 2 channel car amplifier. The built in MOS-FET design and “ultra-power” technology makes the KAC-9102 very efficient while producing very little heat.

The ultra-low resistance MOS-FET design produces less drain on the batteries.

The KAC-9102 can be used as a two channel amplifier or bridge connected to provide 800 watts of power. The amplifier has a screw terminal input with a four gauge maximum capacity.

The amplifier has built in overload and short circuit protection.

The KAC-9102 uses advanced SMD technology and a new independent temperature control system to increase the overall performance of the unit. The KAC-9102 has a frequency response of 10 Hz to 50 kHz and uses a signal to noise ratio of 95 dB.

The top end of the frequency range is very important for the reproduction of vocals and the KAC-9102 does an excellent job in this area.

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The KAC-9102 uses MOS-FET output stages and a independent tube preamp stage. The MOS-FET output stages produce more power with less drain on the batteries.

The built in MOS-FET design also keeps the amplifier running cooler. The independent tube preamp stage adds warmth to the vocals and instruments, giving the KAC-9102 very pleasing sound quality.

The KAC-9102 comes with a pair of spring post connectors and a pair of battery cables. You will need to purchase two batteries and a fuse holder to power the amplifier.

The KAC-9102 has three sets of speaker outputs. Two sets are 16 gauge, and one set is an 8 gauge output. The 8 gauge output is for a subwoofer.

The KAC-9102 has several built in protection features. The amplifier will be shut down if it senses an overload of the input, or if it gets too hot.

The amp also has a rubberized texture over most of the case to prevent it from slipping if used in a portable fashion.

The KAC-9102 sells for around $480 on the internet. The KAC-9102 is a very solid and reliable amplifier that will provide you with many years of service if taken care of.

KAC-7004 Power Ratings

RMS Power @ 12.5 Volts : 200 Watts x 4

Maximum Power @ 12.5 Volts : 400 Watts x 2

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Bridged Power @ 12.5 Volts : 800 Watts x 1

Signal to Noise Ratio : 95 dB

Speaker Impedance Range : 2 to 8 Ohms

Frequency Response : 10 Hz to 50 kHz

Total Harmonic Distortion : 0.2%

Dimensions : 17″ (W) x 7″ (H) x 13.5 (D)

Weight : 27 Pounds

Product Features

MOS-FET Design

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400 watts x 2 channel @ 4 Ohms

800 watts x 1 channel @ 4 Ohms in bridged mode

Independent tube preamp stage for extended bandwidth and warm sound

Ultra-low resistance MOS-FET design to produce less drain on the batteries

Maintains high efficiency with low heat producing ultra-long life

SMD technology and a new independent temperature control system to increase overall performance

10 Hz to 50 kHz frequency response for very accurate sound

95 dB signal to noise ratio for ultra-quiet operation

2 pairs of spring post connectors and 2 pairs of battery cables included

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Screw terminal input connector with 4 gauge maximum capacity

Rubberized butt end and top cover for increased durability

The KAC-7004 is a perfect match for your subwoofer. It is also very popular among off road truck enthusiasts.

The KAC-7004 is a very solid and reliable amplifier that will provide you with many years of service if taken care of.

KAC-9102 Power Ratings

RMS Power @ 12.5 Volts : 400 Watts x 2 (4 Ohms)

800 Watts x 1 (2 Ohms)

Bridged Power @ 12.5 Volts : 1600 Watts x 1 (4 Ohms)

Signal to Noise Ratio : 90 dB

Speaker Impedance Range : 2 to 8 Ohms

Frequency Response : 10 Hz to 50 kHz

Total Harmonic Distortion : 0.2%

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Dimensions : 17″ (W) x 7″ (H) x 13.5 (D)

Weight : 27 Pounds

Product Features

Sources & references used in this article:

Determination of over current protection thresholds for class D audio amplifiers by F Nyboe, L Risbo, P Andreani – 2005 NORCHIP, 2005 – ieeexplore.ieee.org

Pulsed spectrometer for nuclear quadrupole resonance for remote detection of nitrogen in explosives by D Rutledge – 2001 – CALIFORNIA INST OF TECH …

Amplifier circuit and feedback circuit by N George – 2004 – Macmillan