THE ORRONOCO AUDIO DIY

Lately it is quite rare for me have a spare time during weekends. I mostly spend it with my family. But today is a different story. A week before, one of my friends ask my suggestion to install a 3 way system on his new Honda Jazz. Instead of a 3 way system, I suggested him to look at a small full-range speakers that will be place on top of the dash-board. This could help for minimizing blind spot while driving compares to the 3 way speakers system.

I have a 10 years old Seiko 5 watch which I like it very much. It is very durable watch I've ever wear. I don't even think to buy the new one until one day, I am unexpectedly jump into online forum that discuss about the Seiko watches. I'm really got into it and it is a very good affordable watch that I cannot resist to have one.

I think this post is quite special. In the past I built discrete Mosfet amplifier that very famous in our local DIY audio group. This is Mini Crescendo amplifier is from Elektor magazine featured circa 1989 and I built that amplifier in early 2000. Why this amplifier is so popular? Simply because it sound wonderful. This Mini Crescendo amplifier is class AB using expensive Mosfet 2SK135 and 2SJ50 together with big transformer. Unlike Gainclone amplifier, this amplifier is simple and cheap to build because basically it is an IC based amplifier. So I think this is really interesting to find out which one sound better. The expensive and complicated Mini Crescendo or simple and cheap Gainclone amplifier.

From my last update  here , I found that using small lithium battery that I have take from the old toys is very durable and practical for this CMOY amplifier. Then I also adding the rechargeabe socket in this CMOY for more flexibility. Now this CMOY amplifier is just like a commercial amplifier available in the market.

Last week, when I went to the shopping mal, I saw the Japanese car audio magazine with the speaker treatment product from Audio Technica. That sound deadening product comes with several components, the multi layer sound deadening sheets from various size and thickness, then the most important is the ring for the speakers. The main purpose of this speakers ring is to eliminate the negative pressure of the speaker cones from the back of the speaker to the front. This will prevent cancellation of the sound wave. So in this post I will try to make one for my car.