good beginer guides - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 14th January 2010, 09:08 PM   #1
laki101 is offline laki101  Serbia
diyAudio Member
 
Join Date: Dec 2009
Default good beginer guides

I am new with amps, speakers, ....

Currently I am building an amp 2x~50-60W at 4 ohm speakers and when I finish that I will make some speakers

curently am thinking (im sure actually )of this 3 chanell 4 ohm found good priced ,now have no idea how its called the component that divides the signals to 3 channels,
than I found also weary good priced 20cm 50w 4ohm bass speakers, and 10cm middle tone 4ohm (power I dont know exactly). Now first problem is that I cant find any 4 ohm high tone so could I use piezo?

And second bigger problem is on building the boxes, insulating and stuffing them and so on.So I would like you to give me some good tested links cause 3/4 of the ones I found are rubish and some guides on how to get the dimensions.

By the way I'm 14 if it matters some how
  Reply With Quote
Old 21st January 2010, 06:54 AM   #2
diyAudio Member
 
Join Date: Feb 2004
Location: Los Angeles
Hey, 14, cool! Yes, that's when the speaker bug bit me as well.

Old Colony Sound Labs audioXpress - Home
has a lot of stuff. Vance Dickason's "Loudspeaker Cookbook" is one of the best, but be warned it is full of a LOT of stuff. There's also a good book by Martin Colloms. Personally, I got started with David Weems "How To Design, Build, And Test Speakers"-thank you David, I made a LOT of money off your book-but just understand his book is simpler but less accurate perhaps.

Another perhaps helpful place is the Audio Asylum. There is a speaker forum and a high efficiency speaker forum.

On a professional level, the Audio Engineering Society publishes "Loudspeaker Anthologies" which are technical papers about speakers. Tough stuff, but if you keep reading and reading it will start to make sense.

For kits, Madisound.com and Zalytron.com are good places to look. Also Vance's site Loudspeaker Development Corporation Homepage though I haven't looked in detail at it. Parts Express has some good kits and parts as well.

The part that divides the frequencies to each driver is called the crossover. Until you study a LOT about speakers, I highly advise you to stick to a kit someone else has designed. Speakers seem simple, but I personally know some of the most expert folks in the field and they would all say they are still learning about speakers!

I gotta say, there is nothing like the feeling of satisfaction you get when someone likes your speakers, asks "what kind are they" and then you watch their eyes bug out when you say "I built them" :-)

P.S. piezos are not for good sound. Forget it.
P.P.S. Unless your 4 ohm amp is tubed, you will be fine to run 8 ohm speakers as well. There are indeed 4 ohm tweeters however.
  Reply With Quote
Old 23rd January 2010, 08:17 PM   #3
laki101 is offline laki101  Serbia
diyAudio Member
 
Join Date: Dec 2009
Quote:
Originally Posted by head_unit View Post
I gotta say, there is nothing like the feeling of satisfaction you get when someone likes your speakers, asks "what kind are they" and then you watch their eyes bug out when you say "I built them" :-)
Trust you on that. I could go and by second hand speakers maybe even better sound then my, cheaper then it would cost me but its just a speaker. But when you make every cm of it by hand its not just a speaker but it becomes something beautiful, the best sound ever heard the best speakers in the world .Just kidding but you have a completely different attitude towards your hand made and ones off the shelf.


Quote:
Originally Posted by head_unit View Post
P.P.S. Unless your 4 ohm amp is tubed, you will be fine to run 8 ohm speakers as well. There are indeed 4 ohm tweeters however.
I have an lm 3886 chip amp 2x120W on 4 ohm and just 2x60w on 8 ohm so going with 4 ohm cause I LOVE powerful sound.
  Reply With Quote
Old 24th January 2010, 06:38 PM   #4
diyAudio Member
 
Join Date: Feb 2004
Location: Los Angeles
Well, I'm not saying to build 8 ohm speakers. I'm just saying that what you should care about most is high sensitivity drivers. If those happen to be 8 ohms, don't worry about it is what I am saying. The high sensitivity is more important for total SPL than the impedance.
- Remember, a speaker's impedance is not EXACTLY 4 or 8 ohms, it varies a lot anyway
- I doubt very much the chip is exactly 120W@4 ohms and 60W@8. For 99% of amplifiers, if you ignore the spec sheet and measure at the actual clipping point, you'll find that if it's exactly 120 at 4, it is around 2x120/3 = 80W @ 8 ohms. It's just physics of real transistors and real power supplies. So at a pure 4 ohms, you get maybe just 2 dB more power. The sensitivity of the speakers can make a much bigger difference than 2 dB.
  Reply With Quote
Old 24th January 2010, 06:49 PM   #5
laki101 is offline laki101  Serbia
diyAudio Member
 
Join Date: Dec 2009
well for start I want to finish the amp. And when I test it and everything I will begin work on speakers
  Reply With Quote
Old 25th January 2010, 07:19 AM   #6
diyAudio Member
 
Join Date: Feb 2004
Location: Los Angeles
I'm curious now, so let us know what the actual output versus impedance is (if you have some huge Dale resistors to test with, that is...)
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Spl S3tl And Beginer bull041161 Multi-Way 0 18th May 2009 08:20 PM
A Slew of Beginer Tube Questions JPeitzman Tubes / Valves 14 13th November 2007 11:45 PM
suggested books for beginer? ackcheng Digital Source 5 6th June 2005 05:46 PM
please help with a beginer question ldydrumer Instruments and Amps 5 24th April 2005 04:54 PM
beginer help?? easyrider Chip Amps 1 16th October 2003 02:37 AM


New To Site? Need Help?

All times are GMT. The time now is 08:10 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2