Amp keeps cutting out

[MotoMan3198]

so my brother just gave me a new kenwood kac-7201 series amp. (i think thats it) i hooked it up just fine. now from a 250 watt amp to this 800 watt amp it now cuts out when i turn up the subs on the deck. i have it hooked up to my battery with 14g wire. the ground is connected under the hood. it only cuts out when i turn it up. i turn on the car and it doesnt cut out as much, but still enough to worry about. what could this be? would you suggest a capacitor? any help would be appreciated. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

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[boomzilla 10+ year member]

if your sub is a dual voice coil and is wired in parallel, it could be at an ohm not stable with your amp. i accidentally wired a sub in parrallel instead of series and when id go to crank it it would cut off, so im sure its the problem. lmk if you need anymore help.

 

[boomzilla 10+ year member]

and i think the reason it doesnt cut out as much when the engines running is because the alt is charging your battery while your amp is pulling energy from the battery, meaning when its off your amp isnt getting enough energy causing it to cut out more. if you had a really good electrical system it probably would run fine. again, not to sure, just going by what i try to learn on here.

tell us the model number of the sub and we can find out more of whats going on. pics to if you can.

edit: heres info on your amp

Specifications supplied from Kenwood:

-Power MOSFET switching power supply

-TRI-MODE™ speaker operation

-Gold plated power and speaker terminals

-Stereo and mono operation

-2 Ohm stable

-Power consumption (4 Ohms, 10% THD)..........43 amps

-Operating voltage................. 14.4 (11-16 allowable)

* Audio Section

-Max Power Output..800 Watts x 1

-Rated Power Output.....

Normal (4 Ohms)(20Hz - 20kHz, 0.08% THD.......150 Watts x 2

------ (4 Ohms)(DIN: 45324, +B = 14.4 volt....150 Watts x 2

------ (2 Ohms)(1kHz, 0.8% THD)...............230 Watts x 2

Bridged (4 Ohms)(1kHz, 0.8% THD)..............460 Watts x 1

Frequency Response (+0, -3db)................5 Hz - 50 kHz

Sensitivity (rated output)(MAXIMUM)..............0.2 volts

--------------------------(MINIMUM)..............5.0 volts

-Signal to noise ratio...............................100db

-Input impedance...............................10,000 Ohms

-Low pass filter freq.(18db/oct)........50-200Hz (variable)

-High pass filter freq.(12db/oct)........150Hz (selectable)

-Bass boost circuit (90Hz)...................OFF/+12db

 

[king ranch 5,000+ posts]

maybe because u have 14 guage as the power wire people use that for comp speaker wire

 

[jrwalte 10+ year member]

I think you are mistaken when you say 14g power wire to the battery. Typical sizes from amp kits are 8g and 4g. 14g wire wouldn't even handle the old amp. If you seriously have 14g wire running to your amp, disconnect your amp immediately and do not use it until you purchase a 4g amp kit.

 

[king ranch 5,000+ posts]

run that 14 guage and u will have fire

 

[MotoMan3198]

thanks for your replys guys. i will disconnect it immediatly. i do not want to have a car that is full of ashes. i am looking for a semi good wiring kit. from 20.00 to 40.00 any suggestions?

 

[jbizzle 5,000+ posts]

KnuKonceptz 4 gauge kit

 

[jbizzle 5,000+ posts]

http://knukonceptz.com/productDetail.cfm?prodID=KLM-K4

 

[GearGuy2001 10+ year member]

wow im suprised your brother didnt stop you when he saw you using 14awg, what is he running? 12awg....

Also I 2nd the above, I was very happy with my knu wiring

 

[MotoMan3198]

and i think the reason it doesnt cut out as much when the engines running is because the alt is charging your battery while your amp is pulling energy from the battery, meaning when its off your amp isnt getting enough energy causing it to cut out more. if you had a really good electrical system it probably would run fine. again, not to sure, just going by what i try to learn on here.
tell us the model number of the sub and we can find out more of whats going on. pics to if you can.

edit: heres info on your amp

Specifications supplied from Kenwood:

-Power MOSFET switching power supply

-TRI-MODE™ speaker operation

-Gold plated power and speaker terminals

-Stereo and mono operation

-2 Ohm stable

-Power consumption (4 Ohms, 10% THD)..........43 amps

-Operating voltage................. 14.4 (11-16 allowable)

* Audio Section

-Max Power Output..800 Watts x 1

-Rated Power Output.....

Normal (4 Ohms)(20Hz - 20kHz, 0.08% THD.......150 Watts x 2

------ (4 Ohms)(DIN: 45324, +B = 14.4 volt....150 Watts x 2

------ (2 Ohms)(1kHz, 0.8% THD)...............230 Watts x 2

Bridged (4 Ohms)(1kHz, 0.8% THD)..............460 Watts x 1

Frequency Response (+0, -3db)................5 Hz - 50 kHz

Sensitivity (rated output)(MAXIMUM)..............0.2 volts

--------------------------(MINIMUM)..............5.0 volts

-Signal to noise ratio...............................100db

-Input impedance...............................10,000 Ohms

-Low pass filter freq.(18db/oct)........50-200Hz (variable)

-High pass filter freq.(12db/oct)........150Hz (selectable)

-Bass boost circuit (90Hz)...................OFF/+12db

Thanks for that Boomzilla

i have no idea how the subs are wired in there. the model number for the subs is XOBP12D

Here are some specs for the Dual XOBP12D

Specifications:

Max power handling: 1100 watts

RMS power handling: 600 watts

Sensitivity: 89dB

Frequency Response: 25-200Hz

Impedance: 4 Ohms

Height: 14.4"

Width: 30"

Depth: 14.4"

Features:

Low-Q optimized drivers

Carpeted enclosure

Plexi subwoofer viewing windows

Built-in crossovers

Mirrored and diamond plated chambers

Dual chamber design

12v DC blue glow illumination

Easy add-on to existing systems

yeah they arent the best subs on the market, but hey its better than nothing.

thanks for you help boom

 

[boomzilla 10+ year member]

well, it looks like the subs are just a single voice coil, do you have them now? or did you just order them? tell me if theres only 1 pair of terminals to plug the speaker in or if there is 2 pairs.

i didnt see what you wrote about using 14g wire as your power wire, im sure that was your problem right there. wait until you get a 4g wiring kit, that 14g wire is very prone to fire if you use it for your amp. and make sure you fuse all your + wiring connects to avoid fire incase a short happens. and another thing, always disconnect your battery when screwing with any electrical wires, you could seriously damage some shit if you dont know what your doing

no problem man, ill be happy to help you out anyway i can

 

[GearGuy2001 10+ year member]

i didnt see what you wrote about using 14g wire as your power wire

so my brother just gave me a new kenwood kac-7201 series amp. (i think thats it) i hooked it up just fine. now from a 250 watt amp to this 800 watt amp it now cuts out when i turn up the subs on the deck. i have it hooked up to my battery with 14g wire. the ground is connected under the hood. it only cuts out when i turn it up. i turn on the car and it doesnt cut out as much, but still enough to worry about. what could this be? would you suggest a capacitor? any help would be appreciated. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Also let us know when you get it running

 

[jrwalte 10+ year member]

you could seriously damage some shit if you dont know what your doing

Which, no offense, if you were using a 14g as your power wire, you don't //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif This is DC at around 12-14 volts, not AC around 110-120. Just because a 14g wire in the house can handle around 1500 watts doesn't mean it can in a car //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif In the car, that same wire can only handle about 200 watts. But that's a good thing. If our cars used AC or (which I don't even think that's possible, because I don't think any battery can be AC) or DC at a really high voltage, half us DIY'ers would probably be dead from electrical shock //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[Haunz 10+ year member]

14 awg won't cause a fire... but it will cause voltage drop and a current clip mode....

LOL @ 14 awg power wire.... //content.invisioncic.com/y282845/emoticons/hilarious.gif.02a037aad04aa96f19982b298a3d70a8.gif