Where can I find the diagram of the VR401 - Crossfire 400 Watt Mono Amplifier

Send it back to maker for repair.

CX400.1 Mono Amplifier - KICKER

https://www.kicker.com > CXA4001-400-Watt-Mono-C...

Using efficient Class-D power, the CXA400.1 features a variable bass boost with KickEQ™, giving you as much as a 6dB of extra bump with a simple turn of the ..

for stereo wiring, you get the most power with dual 2 ohm loads, in mono, you want a single 4 ohm load, or 2x2 ohm loads

KENWOOD KAC-X501F USER MANUAL Pdf Download

This link should take you to the manual.

Your amp is under powered for those speakers (350 max. watt). Even if your subs were 2 ohm your amp will only put out 75 watts X 2 at 2 ohms, if you bridge that amp you might be asking for trouble . I'm guessing there both 4 ohm. Look around for a 2 ohm stable mono amp with more power and you won't be sorry. Ray

are you sure you didnt wire the amplifier the front and rear to
left/ right?

check your deck settings to see that the rear speaker rca are connected.
check all wires are connected.
push the mono or bridge buttons are off.

provide more info.

Its sound ic is damaged so you have to replace it

run 2 4 guage wires to the pos and neg terminals

Hi mate very nice amp you got there here is the specs for it



Model: MA Audio HK401SX
Hard Kore Series 1800 Watt 1 Channel High Performance Class X Car Amplifier
1 x 1800W RMS @ 0.5 Ohm Mono
1 x 1200W RMS @ 1 Ohm Mono
1 x 650W RMS @ 2 Ohm Mono
1 x 500W RMS @ 4 Ohm Mono
Fully Unregulated MOSFET Power Supply
2 Ohm Stable @ Mono
1 Ohm Stable @ Mono
0.5 Ohm Stable @ Mono

if you have 2 12s just bridge them and you will have 650wrms at 2ohm running to them or one sub at 4 ohm 500w rms ps they should pump iam running 2 12s with just 360rms at 2ohm and they do the job good luck

That amplifier is only stable to 2 ohms.
You will only be able to use one Dual 4 ohm Subwoofer wired in parallel (all + to + on amp.... all - to - on amp.
This will yield a 2 ohm mono load.

It is impossible to wire (2) dual 4 ohm voicecoils to achieve a 2 ohm mono load.

If you're set on using both subwoofers - they will not be getting as much power from your amplifier with a 4 ohm load - but it is your only option.


SEE THIS LINK for the wiring diagram.

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All amps aren't created equal. More exspense amps put out "cleaner" power. You need to know what the RMS power rating is for the amp at 8 ohms and 4 ohms. Also, is the speaker an 8 or 4 ohm speaker? How you wire a speaker or speakers (series or paralell) can change the ohms (resistence) which will change the power put out of the amp. Also, I'm assuming you are setting it up in mono?