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Little travel combo with fuzz/distortion

Started by pelanj, March 30, 2009, 05:43:20 PM

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pelanj

Here are a few pictures from my newest build - http://kremator.rajce.idnes.cz/Kombo_se_zkreslenim/

Nothing really fancy, just a combination of this chipamp - http://www.redcircuits.com/Page96.htm and Bazz Fuss DeLuxe - http://www.home-wrecker.com/bazz.html (without the series inductor). There is a bypass for the Fuss and very little cap tweaking (I used what I found:) ). All built into a plastic home theater center speaker. There is a resistor in series with the external speaker output to simulate low damping factor. Although the Bazz Fuss is a little limited in tone options, it is nice to have around for practicing. I usually use it with various distortion pedals for more "metal" sound. All powered from a 9V battery or an external AC/DC adaptor - currently a 5V Motorola phone charger.

One notable feature that makes this maybe interesting is the low pass filter for the internal speaker - an ordinary second order lowpass (as in hifi loudspeaker crossovers) formed by 330 uH inductor and 3u3 capacitor. The corner frequency is around 4500 Hz for a 6 ohm loudspeaker. I think it provides a nice approximation of a larger (12") speaker. I even think of building one into my old Marshall MS-2 as the small speaker inside sounds crappy with distortion - the MS2 itself sound surprisingly well with a 2x12" box.

The good thing about this chipamp is that it is sufficiently loud for practice even with 3 volts. I am planning to buld one into one of the left surround speakers with a volume knob and a low pass filter to make a small warm-up amp to take anywhere.

And for the very brave ones, here is some noodling with the amp using an Ibanez MikroGRG and a Logitech headset microphone with various settings and low pass on-off:

http://www.edisk.cz/stahnout-soubor/87773/kombo3.mp3_1.02MB.html
http://www.edisk.cz/stahnout-soubor/47885/KomboTest1.mp3_2.63MB.html
http://www.edisk.cz/stahnout-soubor/05097/kombotest2.mp3_2.84MB.html

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