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How to connect a 2 chan amp to a mono?

Old 02-02-2008, 06:53 PM
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turismo29
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Default How to connect a 2 chan amp to a mono?

I have a single mtx thunder 5000 subwoofer and a kenwood kac-648s amp. It's a 4/3/2 amp. I was just wondering if I can somehow wire it so that all the power go to the single subwoofer.

Heres the manual :

http://inform3.kenwoodusa.com/manuals%5CKAC648s.pdf
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Old 02-02-2008, 10:50 PM
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First you have to tell us the exact subwoofer model...it is important to know the impedance of the speaker and how many voicecoils.
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Old 02-03-2008, 07:15 PM
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turismo29
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I tried to look for it but can't find it. I got this off a friend and he don't know the model either. I know he bought it and it came with the manufacturer mtx enclosure. I see the date on it it says 12/1998, so dec 1998? I've put some pix of what I can on here. Maybe someone knows.




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Old 02-03-2008, 08:58 PM
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That amp will not be the best fitting amp...but here you go. I think it is safe to assume that its a 4 OHM SVC sub.

Specs for amp.
4 x 25W @ 4 ohms (0.08% THD - 20Hz-20kHz)
4 x 35W @ 2 ohms (0.8% THD - 1kHz)
2 x 70W @ 4 ohms bridged (0.8% THD - 1kHz)

There is not much you can do except bridge 2 of the channels. Use the + from CH1 and the - from CH2 and run them to the sub. It probably will tell you how to bridge the two channels on the amp itself.

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Old 02-03-2008, 10:02 PM
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I think I understand ur drawing, I connect the two blue circles. But how would i adjust these setting? I think it should be : filter-lpf, operation-stereo, input selector-A only,and input sensitivity would just depends on how loud i want it.



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Old 02-03-2008, 10:47 PM
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low pass filter
mono
input A

That is assuming that you are ONLY powering that one subwoofer and nothing else with that amp.


The input sensitivity is not a volume knob...you set this according to the headunit you have. Run a search on "setting gains" or something.
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Old 02-04-2008, 12:01 PM
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QUOTE]I think I understand ur drawing, I connect the two blue circles. But how would i adjust these setting? I think it should be : filter-lpf, operation-stereo, input selector-A only,and input sensitivity would just depends on how loud i want it.
[/QUOTE]

using Input A, set the amp to do LPF or low pass filter. the amp will run in a Mono channel meaning it will push the sub ONLY.

now settings gains is really simple. donwload a 50hz 0db sound track. play the song, but turn off all eq, loudness etc on your deck. turn it loud to th epoint where your speakers start to crackle. if they crackle at that point (known as clipping) turn it down a few notches. dissconnect your sub(s), place your DMM (digital volt meter) and place Red on (+) speaker terminal and Black on (-) speaker terminal. Using the gain, turn it up, so you get a reading in DC (set dmm to 100v DC). the number you get will correspond to the output of that connection is RMS. example, your DMM shows 40.0volts. that means your amp under clipping will be sending out 400watts RMS. adjust accordingly. dont be too cocky and if your subs can take 300watts dont set the amp to 400w. your just risking or fryin ut sub and possibly amp.
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Old 02-04-2008, 05:37 PM
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Thanks for the help. My deck will be here on Friday and I'll work on it over the weekend. I'll post up pics of my mini set up :)
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Old 02-04-2008, 07:00 PM
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Sweet :thumbup:
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