View Full Version : SOLD/CLOSED Kenwood KAC-X40

03-28-2012, 05:52 PM
Item(s) for Sale:
Kenwood KAC-X40 Class A/B 4-Channel Amplifier

Item(s) Description/Condition:

Good Condition, minor scratches. 9/10 aesthetically, 10/10 functionality.


4-Channel Amplifier
Peak Power: 800 watts
Power Handling:
70 watts RMS x 4 @ 4 ohms
100 watts RMS x 4 @ 2 ohms
200 watts RMS x 2 @ 4 ohms (bridged)
2 ohms Load Capability
Bass Boost Frequency: 40 Hz - 100 Hz
Frequency Response: 5 Hz - 70 kHz
CEA-2006 Compliment
Line Output Terminals for Extension
Cast Aluminum Heat Sink
Power MOS-FET Switching Power Supply
Stereo,Mono Operation
Dimensions: 11-1/4" L x 14-15/16" W x 2-9/16" H


$120.00 Shipped OBO

Shipping and Miscellaneous Item Information: Shipping will be USPS and insured with tracking, and is included in the asking price unless other arrangements are made with buyer.

Item Pictures:
(List pictures in this section, 1st picture should be your username/date if you have less than 10 positive feedbacks with the i-Trader system or less than 10 references that you have sold to in the past. (These must be listed in your signature, or a link provided to a feedback thread listing these references)).

This is a video of all 4 channels working and also my sub amp, which is for sale, and it's funtionality too.
ampsforsale 013.MOV - YouTube (http://youtu.be/GMRYBbg2-jM)

03-28-2012, 07:25 PM
thats 1 hell of a 4ch amp right there.. any trades?

03-28-2012, 07:30 PM
thats 1 hell of a 4ch amp right there.. any trades?

Thanks Bro, unfortunately I can't use trades. I am using the sale money to help buy my new upgrades. If at some point I don't need the money, you Sir,will be the first I let know!

03-28-2012, 07:32 PM
ill be working on cash for this.. thanks

03-28-2012, 10:10 PM
I still love this amp

03-28-2012, 10:50 PM
I still love this amp

Thanks Bro, it's a really good amp, and is super clean. Plenty of power to run just about any component sets out there.

03-29-2012, 07:45 AM
how does this compare to the kenwood KAC 8405? its almost the same specs

4-Channel Performance Series Class AB Car Amplifier
RMS Power Rating:
4 ohms: 60 watts x 4 chan.
2 ohms: 90 watts x 4 chan.
Bridged, 4 ohms: 180 watts x 2 chan.
Max power output: 720 Watts
MOSFET power supply
LED power indicators
4/3/2 channel operation
Speaker-level inputs
Input sensitivity control
Bass boost switch
Short circuit, DC offset, overload, and thermal protection circuitry
Signal sensing turn-on
Cast aluminum heat sink design
Built-in cooling fan
Gold-plated RCA level inputs
Gold-plated screw terminals
Single side exposure of terminals for multi-installation
Variable high-pass filter (50-200 Hz, 12 dB/octave)
Variable low-pass filter (50-200 Hz, 12 dB/octave)
CEA-2006 compliant amplifier
Frequency response: 50-200 Hz
Dimensions: 11"L x 2-5/16"H x 9-3/8"D
8-gauge power and ground leads recommended. Contact us for information regarding a discount on a select amplifier kit when purchased together.
1-year Sonic Electronix warranty

im trying to see if theres enough of a difference to switch out and buy this one?? any inputs?

03-29-2012, 08:14 AM
There's a couple key differences between the two, which is one of the reason's they don't sell one like mine anymore. First, the X40 is what's considered a "digital" amp which the 8405 is not. The X40 is very very efficient and has a max THD of .5% where as most other amps will say "min THD". this means as you turn it up, distortion is going up too, which is a no no at high volumes. Plus the added power would make it easier to power components and easier on your electrical.

I have mine on a set of Boston Acoustics speakers rated at 60 watts and I don't have the amp set up very high, so it gives me plenty of leadway powering my speakers.

03-29-2012, 10:25 AM
This is a good thread, Glws homie. I wish it did that 200x2 at 2 ohms, it would be mine.....

03-29-2012, 11:07 AM
Thanks for the kind words JD!

03-29-2012, 03:41 PM

03-29-2012, 10:55 PM
Night bump

03-30-2012, 08:08 AM
I had a stripper get some "juice" on this while dancing one day, adds 3 db's. Morning Bump

03-31-2012, 08:10 AM

03-31-2012, 10:16 PM
night bump

03-31-2012, 10:40 PM
can you do $80 shipped to 28690? paypal ready if so, thanks

04-01-2012, 08:26 AM
Thanks for the offer Bro, but I am gonna have to pass. Bump!

04-01-2012, 11:56 AM
PM sent!

04-01-2012, 12:35 PM
PM returned, sale pending

04-01-2012, 03:34 PM
np its worth what your asking.. im just broke like everyone else you no how it is! glws.. i had no real use for it just nice to have..

04-02-2012, 12:31 PM
Hey man, I didn't realize you had posted. Thanks for helping me out with answering some of my questions. If I lived closer to kentucky, I believe we would make good team members.

04-03-2012, 08:04 AM
Thanks for all the inquiries, but this amp has found a new home, and will be shipped today!