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Originally Posted by DerAlte  Superb work, Mishra-ji! The amp looks neat and well finished. |
Thanks DerAlte, That I wanted perfect 99% silent without input with full volume. Now it cleaned more.
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Originally Posted by DerAlte * Where did you get the front baffle for the speaker boxes? Seems to have 2 ports! What are the drivers that you have put in?
* Or, did you buy these boxes readymade? |
Yes These baffles I bought at SP road, Bangalore (now I dont remeber the shop name but if you enter from OM Ele. then it was right side inside lane opp. to chopda ele ) Rs 250/each.
I calulated the port volume /area and resonance frequecy was decided 60Hz. (I wanted to avoid any 50Hz hum and below that I cant hear). Box volume calculated and odd dimensions were given to that guy to make boxes.(8.5"WX13.5"HX11"D) to avoid internal reflection and waves cancelling/resonating. MDF ply thick ness is 1". costed 350Rs for pair.
Regarding dual port it does not matter number of ports (total volume V=V1+V2)
Inside surface is coated with dual foam tape as Damping material. Over that I pasted all side using buble sheet (packing material) , exposing bubbles to internal air, so damping is good and cleaner/hygenic than fibre glass wool.
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Originally Posted by DerAlte * Where did you get the input select switch from? |
This switch is available anywhere on SP road. I bought in Marudhar Ele. Ulsoor, end of CMH road. There are two qualities, I selected the one with chrome plated connectors and phenolic PCB (can be seen from connector side) Rs 80.
Drivers I am using normal Bolten one (200Watts), but planning to replace soon with Luxco which I have in my hometown. It has 2" diameter voice coil. and 2.5kg Magnet for 8" driver.
Cheers,