Question about Kenwood KAC-7204 Car Audio Amplifier

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How to hook up kenwood kac-7204 1000watt amp

4ohm speakers for (high-pass filter frequency

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I found the manual & have pasted the url here for you. some things to keep in mind. according to the instruction manual this unit is rated @ 500W, not 1000W. Also to maximize the output you should use 2ohm speakers for stereo applications. Also make sure if you need to extend the power wire, use 10 gauge copper & make sure it's connected to the car battery thru a 60 amp fuse. Also make sure the ground is attached to a clean metal frame or body part by using a bolt & nut not merely a screw. Good luck. If you need additional assistance let me know.

http://inform3.kenwoodusa.com/manuals%5Ckac7204.pdf

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Posted on Jan 06, 2009

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1 Answer

What is the low pass filter on my amp for


A subwoofer is a low frequency device so it is designed to amplify low frequencies <200 herts to play on a speaker designed for low frequencies. You want low frequencies to pass to the amplifier while high frequencies do not enter the amplifier to cause damage to your amplifier or sub woofer speakers plus it will sound terrible. Anothher reason may be to not have to worry about a crossover filter on the speaker system..

Aug 08, 2014 | Soundstream P1.210 210W Monoblock Picasso...

1 Answer

I put a sub in my 2002 Altima but when I turn it up the bass cracks on the door speakers??? What do I do to get all the bass on the sub


Hi Ethan,

What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.

You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.

I hope this helps & good luck!

Apr 12, 2012 | Pioneer Car Audio & Video

1 Answer

What are the applications of a band pass and low pass filters?


A "band pass" filter attenuates all frequencies except those in its specified range. A "low pass" filter attenuates frequencies above a specified frequency (permitting only lower frequencies to "pass"). A "high pass" filter attenuates frequencies below a specified frequency (permitting only higher frequencies to "pass").

For example, a "band pass" filter rated for 500MHz-4GHz will effectively eliminate all frequencies below 500MHz and all frequencies above 4GHz. A "low pass" filter rated at 10KHz will effectively eliminate all frequencies that are above 10KHz. A "high pass" filter rated at 70Hz will effectively eliminate all frequencies that are below 70Hz.

Jul 25, 2011 | Computers & Internet

1 Answer

What is the best adjustment for a Nitro BMW 481 with one 12" Memphis subwoofer?


First you need to determine what kind of subwoofer it is and by that i mean, is it a dual voice coil subwoofer or a single voice coil sub woofer.
Dual voice coil(DVC)
Depending on how many Ohms each voice coil is you will have the amplifier drive a specific load (4OHM stereo (75 RMS x 2) 150RMS total power / 2OHM stereo(100RMS x 2) 200RMS total power) Connect each voice coils separatley to each speaker output of the amplifier for this configaration. Always making sure that the + & - of each voice coil go to the coresponding location of the speaker outputs of your amplifier.

If your sub woofer is a single 4OHM voice coil then your cables should be connected to the coresponding location on your amplifier which states "BRIDGED" It is marked clearly on the speaker outputs of your amplfier.

If it is a 2OHM then do not connect it to the amplifier. The specific amplifier is not stable at 2OHMS bridged and will most likely get damaged if you try to operate it at that OHM load.

IMPORTANT:
On the side of the amplifier where the adjustments are there is a switch that indicates X-OVER. (LPF/HPF/FULL) Make sure to set it to LPF (Low Pass Filter). (not doing so can damage the subwoofer)
On the left hand side of the X-OVER there is the adjustment for the LPF (30-250) the best setting would be at the same frequency that your speakers stop
(example):
If your speakers have a frequency response of 60Hz to 20KHz then setting your LPF to roughly 70 to 80 will be ideal. The rule is that where one speaker drivers frequency ends, the other must continue in order to complete the full range of audible frequencies.

if you have any more questions feel free to ask.
Respectfully
dreamsystems

Feb 05, 2011 | Nitro BMW-481 Car Audio Amplifier

1 Answer

How to wire kenwood subwoofer to kenwood KAC-8404 car amplifier


Hi, this is a 4 channel amp. Not really designed for a sub, but you can use it that way. Cay you tell me all the speakers you want to hook up--need their sizes or frequency ranges and their impedances. Or, if you have model number for the sub that will do. Is it one sub or 2? I will then get back to you with a recommended setup. OK?

Jan 18, 2011 | Kenwood Car Audio & Video

1 Answer

Can we use the subwoofer as an amplifier for speakers? it has jacks for speaker in/out, but i can't figure out how to make it work because the speakers have no sound.


I don't believe this hookup is amplified; but, if you have used the regular unfiltered speaker connections from your receiver/amplifier to hookup the subwoofer, the system will pass the signal thru the outputs subject to the crossover adjustment on the back panel. You cannot get the full signal if your system is sending only the bass signal to the subwoofer. I have copied the instructions below from the manual. You would set the high freq crossover to the low end of your satellite's frequency range. The full manual is here: http://www.jbl.com/EN-US/Products/Pages/ProductSupportDetails.aspx?PID=PSW-D110

High-Pass Control
• If you hooked up your subwoofer
as shown in Hookup
3 on page 4, you also have
the capability of adjusting
the high-pass frequency.
The High-Pass control
determines the frequency at
which the main speakers
will start reproducing
sounds. If your main speakers
can comfortably reproduce
some low-frequency
sounds, also set this control
to a lower frequency
setting, between 50Hz –
100Hz. This will concentrate
the subwoofer’s
efforts to the ultradeep
bass sounds, while your
main speakers continue to
reproduce the mid-bass
information. If you are
using smaller bookshelf
speakers that do not extend
to the lower bass frequencies,
set the high-pass crossover
control to a higher setting,
between 125Hz – 180Hz.
With this setting, your main
speakers will not have the
burden of reproducing any
low-frequency sounds.
• If you hooked up your subwoofer
as shown in Hookup
1 on page 3, the high-pass
frequency is fixed at 180Hz.
• If you hooked up your subwoofer
as shown in Hookup
2 on page 4, there is no
high-pass control. Unless
your receiver/amplifier
incorporates a high-pass
crossover, your main speakers
will continue to get a
full-range signal.
Final adjustment and blending
of the low-pass and high-pass
controls may evolve over several
listening sessions. A good
starting point would be to set
both the low- and high-pass
controls to the same frequency
and adjust from that point.

Sep 07, 2010 | JBL PSW-D110 Speaker

1 Answer

Car Audio - mixed ohm speakes - best setup


Here is the link how the speakers are suppose to be connected.

http://www.fixya.com/Uploads/images/94A2E8C.jpg

You notice how they hook it up the left connections are your full range or hi frequency speakers and the switch is on for HPF (High pass Filter meaning only high frequency is being passed thru)

The right connections are connected to subs and the switch is on for LPF (Low pass Filter meaning only low frequency is being passed thru)

If you turn off these switches to off the its FULL RANGE all frequencies will pass thru.

The single output of the radio is probably for a subwoofer output but since your using the amp to power speakers too Its useless because your sending only low frequencies to the amp which will make any speakers connected to the amp sound horrible due too all the highs and mids will be filtered out.

STEP 1. 2 4ohm speakers depending where you put them Front or back. Hook these speakers up to the Radio's speaker wires coming out of the radio harness. You can also call them Hi level output wires FR & FL wires if positioning them in the Front. Hook them to the RL or RR if positioning them in the Back. What ever wires you dont use tape them SEPARATELY . DO NOT TAPE THEM TOGETHER and cause them to touch each other it will short out the radio and you will hear no sound.

STEP 2. Ok get 4 same length speaker wires and cut them long enough to go too the amp. Now these speaker wires will only send the FULL RANGE frequency signals to your amp. So note with a paper and pen how your connecting each speaker wire. I would tape one wire with black tape to remember this is the FR right, 2 tape FR left, 3 tape BK right, 4 tape Bk left. And I would make the copper thread of the wire positive and silver thread of the wire negative (very important so that your in phase and it will sound awesome) mixing up the positive and negatives will give you a tinney sound and it horrible to hear .

STEP 3 connect these 4 speaker wires to the High level out speaker wires coming out of the radio. The wires that are already connected to the 2 4ohm speakers go ahead and splice into them and the ones you didnt use connect to the remaining 2/4 speakers. REMEMBER OR NOTE THE CONNECTIONS cause you have to connect the right sequence and right polarity + & - to the HI Level input of the AMP. You will not use any RCA'S from the radio to the amp anymore. Since your radio dont have any Front & Rear output coming from the back of the radio. (YOU CANNOT USE BOTH RCA INPUT & HI LEVEL INPUT OF THE AMP ITS 1 or the other OR YOU WILL BURN OUT THE AMP AND DAMAGE THE RADIO)

STEP 4. Now connect your 2 6ohm speakers of your front left and back left together in parallel and your 2 6ohm speakers of your front right and back right together in parallel. Look at the diagram hook it on the left connections as in the picture of the front left speaker(but your connecting two 6ohms valued at 3ohms when in parallel and the amp can handle 2ohms so its safe) Do the same connection for your two right speakers as shown in the diagram of the Front right speaker. SWITCH THE HPF to OFF so that you get full range out of your speakers. Mid range is 70% of your music if you turn it ON you are only getting the high frequencies and it will sound awful.

STEP 5. This is the final connection Your 6 ohm sub is very bad for this amp. For example if you bridge it off of the last two channels the amp may double the power. If each channel is 100 watts and you connect the positive to one channels positive and connect the negative to the others channel negative(presuming its bridgeable) On a regular 4ohm sub it will be getting 200 Watts of power which is an average thump. Now you put a 6 ohm sub it will be weak and it will be getting around 130Watts. To make it worse if this 4 Channel amp is not bridgeable you can only connect it to 1 channel and the output will be around 70 WATTS causing distortion due to lack of power. If you still connect the sub be sure the switch is ON.

Good luck cause this the best connection you can do anything different and I'm sorry it will sound even worse. I am a master installer and have done this for 12 yrs. The higher the ohms the worse the sound gets cause less power. Thats why car speakers are 4ohms and home speakers are 6 ohms or higher cause they have a bigger amplifier to power and 120volts AC current. A car only has a 12Volt DC current powering the amp.

Apr 06, 2010 | Sony Xplod XM-554ZR Car Audio Amplifier

1 Answer

How to connect Kenwood KAC-6104D to a single 4ohm


you want to parallel the terminals on the woofer. a jumper from positive to positive and the same on the negative will equal 2 ohm load at the amp

Feb 07, 2010 | Kenwood Car Audio & Video

1 Answer

No manual for my amp.


  • Class-D Monoblock Amplifier
  • Bass Boost Level and Frequency Remote Included
  • Variable Low-Pass Filter: 50 - 200 Hz (24 dB/Oct.)
  • Variable Input Sensitivity: 200mV - 5V
  • Phase Shift: 0° / 180°
  • Variable Infrasonic (Subsonic) Filter: 0/15Hz/25Hz (18 dB/Oct.)
  • High- and Low-Level Inputs
  • 1 Ohm Stable
  • RMS Power Output:
    • 500 watts x 1 chan. @ 4 ohms
    • 900 watts x 1 chan. @ 2 ohm
  • Preamp Outputs: 1 Pair
  • Bass Boost: 0 - 18 dB @ 40 - 100 Hz (Variable)
  • Dimensions: 15" L x 11-5/16" W x 2-3/8" H

Oct 05, 2009 | Kenwood KAC-9152D Car Audio Amplifier

2 Answers

How many watts is it


http://www.kenwoodusa.com/UserFiles/File/Global/Consumer/Manuals/kac528.pdf

Page 7 of the manual gives you all the different configurations of this amp, and it's MAX power. FYI; Kenwood rates their amps at MAX power, not clean. Hope this helps.

Sep 30, 2009 | Kenwood KAC-628 Car Audio Amplifier

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