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Old 5th February 2003, 06:36 PM   #1
TomJ is offline TomJ  United Kingdom
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Question What are the diffrences in amps

what is the diffrence in amps I am new to this hobby so could you explain any technical terms you use
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Old 5th February 2003, 06:55 PM   #2
OliverD is offline OliverD  Germany
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What exactly do you mean by differences in amps?

To answer your question we would have to write a number of books here

Are you planning to build an amplifier yourself and looking for a good project to start with? Or links and literature recommendations for some introductory information on the subjet of amplifiers?
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Old 5th February 2003, 09:01 PM   #3
TomJ is offline TomJ  United Kingdom
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I am planning to build an amplifiyer to handle around 60wattsx2 with a volume, sterio balance, Bass control and treble control and it needs to be 8Ohm but i am strugglin to find designs is this because I dont know what this Kind of amps specific name is or are they just impracticle to build so there aren't designs for them
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Old 5th February 2003, 09:46 PM   #4
OliverD is offline OliverD  Germany
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You will find lots of designs for your requirements, but probably not one single project that does it all.

I think you will have to build separate power amplifier, pre-amplifier and tone control (you can integrate them in one case of course).

How much money do you want to spend, how important is sound quality (are you an "audiophile" passionately looking for the best possible sound, or is it rather a beginners' project to familiarize yourself with audio electronics), and have you built electronics before (kits maybe)?

Knowing that, we will be able to suggest projects that suit your needs. Be prepared to receive different opinions

I recommend you visit the site www.passdiy.com and see the beautiful amplifiers people from www.diyaudio.com build at home
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Old 5th February 2003, 09:49 PM   #5
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Quote:
it needs to be 8Ohm
what do you mean? output impedance?

do you want class A, class A/B, valve or does is not matter?

also check out
http://sound.westhost.com/index.html
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Old 5th February 2003, 09:58 PM   #6
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a simple one and all ICs as samples from TI:

http://focus.ti.com/docs/apps/catalo...ctName=sboa082
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Old 5th February 2003, 10:10 PM   #7
OliverD is offline OliverD  Germany
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Uuuuarrrrrgh!

Don't build the circuit shown in Fig. 1 of the application note. It will short your CD-player or whatever source you connect when volume is turned up and balance is turned full-left or full-right.

If they added two input buffers, they'd sell more OPA134's

Better connect R5 (pot) to the other side of R3 and R4, as shown in Fig. 2!
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Old 6th February 2003, 12:03 PM   #8
TomJ is offline TomJ  United Kingdom
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I am a real beginner i have however built a few electronics projects and have a basic understanding of electronics and would like it to not distort things to much
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Old 6th February 2003, 12:15 PM   #9
halojoy is offline halojoy  Sweden
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Thumbs up A Good Place to Start is here.

Quote:
Originally posted by RobPhill33
check out
http://sound.westhost.com/index.html
I have learnt a lot by reading the articles by Elliot.
And also from studying his Projects.

A good place to start, REALLY

Go see if you can find anything interesting there.
He has a lot of different AMPLIFIERS.
And accessoaries and controls of various kind.
-----------------------------------------------------------
When you have made up your mind,
we will help you with the construction and such.
And troubleshoot for you.

halo - promise to try to help you
- but he will not make your choices, for you
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