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Old 2nd December 2009, 09:18 PM   #1
Moset is offline Moset  Sweden
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Join Date: Jun 2009
Default Time to introduce myself

Hi everybody!

(I realize this got pretty long, so if you're in a hurry: I'm Oscar, twenty-six from Sweden. I've built an amp and I'm going to build a pair of fullranges.)

I've been lurking here for a few months now, but haven't really had the urge to post anything before now.

I'm Oscar, a twenty-six year old swede who got into speaker building around twelve years ago. A friend of mine gave me the catalog of a local speaker parts shop and, well, I ended up reading it from cover to cover. I looked at those speaker cones like some men look at cars and most men look at women.

I did, however, have no idea what the hell I was doing. I build my first speakers in shop class. What started out as parts of a bookcase quickly turned into two-ways with twin 8" woofers -- speakers I've kept to this day. Over the years they've gone through several re-iterations. They're probably pretty crap -- I didn't do any calculations, made no attempts to match any driver to the other. Basically, I winged it. Hell, one is sealed and the other ported, just because I never got around to sealing it up after I removed the original tweeter. But for completely winged speakers I've been sufficiently happy with them. Recently, however, the urge to build a new pair, and a good one at that, has emerged. I moved into my first proper, own apartment about a year ago and it's time for my sound system to grow up.

I've been reading here for a few months and I've grown attached to the fullrange idea. I don't know if I'll like it, but you I guess I won't know until I tried. I'm currently leaning towards building a couple of Half Chang's for the living room and a pair of µFonkens for the computer -- the plastic Altec Lansing speakers anno 1995 are growing tired. I just need to look over my budget a couple of times more first.

While studying up on speakers I came to realize I needed a new amp. As a student I bought a cheap Proson 2ch receiver second hand. Cost me about a hundred euros, perhaps two. It's noisy even with my not-very-efficient speakers. There's an audible buzzing from the speakers as soon as I turn it on. It's also a bit flaky and, well, I don't really like it anymore.

So I stumbled upon chip amps, more specifically the LM3886 variant as sold by BrianGT. I pondered buying the parts myself, but it would be more expensive, and much more trouble. So I bought a kit and over the next month or so afterwards scrounged together the missing parts -- a transformer off an online auction, casings from modu.it, various cables, knobs et cetera from wherever I could get a hold of them.

The result is a stereo LM3886 amp and a separate passive preamp, both of which you can see below (the last is of my old amp looking sad under a pile of books) and both of which I will probably ask questions about in the forums. Compared to my old amp, this one is dead quiet. If I put my ear to the midrange and tweeter, I can hear a faint noise when it's completely quiet. If I move away just a little, it's inaudible. Basically, I'm happy.

Now if I could only get to building a pair of speakers to match...
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Old 2nd December 2009, 09:37 PM   #2
Cal Weldon is offline Cal Weldon  Canada
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Location: Near Vancouver
Time to introduce myself
Hello Oscar and welcome to the forums.
planet10 needs your help:
Let's help Ruth and Dave
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Old 2nd December 2009, 09:52 PM   #3
Jonathan Bright is offline Jonathan Bright  Australia
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Join Date: Feb 2004
Location: Queensland Australia
Hi Oscar greetings from the other side of the world. Sounds like your addiction started eary! Good to have you on board. Jonathan
"It was the Springtime of the year when aunt is calling to aunt like mastodons bellowing across primeval swamps." P.G. Wodehouse.
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Old 2nd December 2009, 10:06 PM   #4
Glowbug is offline Glowbug  United States
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Join Date: Feb 2006
Location: Hillsborough, NC
Welcome to the boards
The machine does not isolate us from the great problems of nature but plunges us more deeply into them. - Antoine de Saint-Exupéry
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