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Old 21st January 2008, 01:05 AM   #1
hobbit is offline hobbit  Italy
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Question Simple amplifier

This is my first post. My english is bad.

I want make a amplifier that must to be:
- simple and fast to assembly (good kits or universal board, ....);
- have good sound (better of my Nad 302);
- good for listen classic, spirituals, country, ....;
- working with 89-90db speakers (I don't know the power necessary);
- very cheap;
- well bjt, fet, chip, t-amp, .tube, ....

Give me an idea?

Bye,

Francesco
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Old 21st January 2008, 01:49 AM   #2
tinitus is offline tinitus  Europe
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http://www.aussieamplifiers.com/index3.htm

This new 100watt amp might be worth a try, and he can deliver complete supply boars, easy and safe
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Old 21st January 2008, 02:38 PM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
using cheap as the most important criteria, then you can remove tube from your options.
Chipamp or very simple BJT could get what you need.
For 89 to 90db/W/m speaker try for 50W to 100W.
If your speakers are 8ohm then lm3886 might be your solution.
Small PCB and low component count= cheap, kits= easy to build,
Have a look at some of the chipamp threads, Nuuk's Decibel Dungeon and look at the ESP site.
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Old 21st January 2008, 02:41 PM   #4
hobbit is offline hobbit  Italy
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Thank you for reply.

This project is well but it isn't cheap. I don't need 100w, is excessive for my listen.

Bye,

Francesco
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Old 21st January 2008, 02:48 PM   #5
AndrewT is offline AndrewT  Scotland
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Default Re: Simple amplifier

Quote:
Originally posted by hobbit
.............- working with 89-90db speakers (I don't know the power necessary);...........Give me an idea?

Quote:
Originally posted by hobbit ........ I don't need 100w, is excessive for my listen.
Hi,
do you want or need assistance?
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Old 21st January 2008, 05:00 PM   #6
tinitus is offline tinitus  Europe
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I use 40-50watt...but there are different kinds of 50watt, and my small monsteramps are no doubt much more powerfull than a small chipamp

"41hz" have some interesting amp kits, and quite cheap...personally I dont know them

The 100watt from AussieAmp may also be configured as a 60watt, lowering the voltage
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Old 21st January 2008, 10:42 PM   #7
hobbit is offline hobbit  Italy
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Quote:
Quote:
Originally posted by hobbit
.............- working with 89-90db speakers (I don't know the power necessary);...........Give me an idea?
Quote:
Originally posted by hobbit ........ I don't need 100w, is excessive for my listen.
Hi,
do you want or need assistance?
I think that 20-30w is sufficent because my Nad 302 has 25w and it's sufficient for me. Bur I don't sure.

Quote:
I use 40-50watt...but there are different kinds of 50watt, and my small monsteramps are no doubt much more powerfull than a small chipamp

"41hz" have some interesting amp kits, and quite cheap...personally I dont know them

The 100watt from AussieAmp may also be configured as a 60watt, lowering the voltage
Thanks. 41hz is interesting. Which is best amplifier of 41hz? (good sound)

Best regards,

Francesco
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Old 21st January 2008, 11:15 PM   #8
tinitus is offline tinitus  Europe
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Without knowing, fore you I would say "Amp10" looks interesting with onboard supply and ordinary hole mounting, meaning easy easy to build
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Old 23rd January 2008, 10:49 AM   #9
defect9 is offline defect9  Ireland
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i found simple, and low cost.

http://www.audiosector.com/lm3875.shtml

the dual mono classic: $57 (can be run off a transformer with dual secondaries)

add appropriate transformer(s), available from various places, something local. look for ones with 24v taps and between 150 and 300VAC (if these numbers are wrong, someone correct me please)

the rest is the basics. potentiometer, power switch, Mains jack, RCAs, etc. and case, obviously.

-Jared
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Old 23rd January 2008, 06:14 PM   #10
hobbit is offline hobbit  Italy
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Thanks.

I'm undecided, T-amp way or gainclone-way.
Which is better? Which has better sound?
I don't know t-amp and gainclone sounds.
Bye,

Francesco
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