| T O P I C R E V I E W |
| n/a |
Posted - Oct 07 2010 : 11:38:53 AM
I've just finished constructing a stereo amplifier to give me decent sound from my TV and DVD player. It's built around the TDA2004 2x10W class B stereo amp chip and it worked fine on the breadboard. I'm now in the process of mounting everything onto copper strip board and have a neat little enclosure ready to finish it off. I'm taking pitures of the construction along the way and I'd be very happy to submit the circuit with construction comments and pictures if anyone's interested. |
| 15 L A T E S T R E P L I E S (Newest First) |
| n/a |
Posted - Mar 26 2011 : 04:43:33 AM
good posting. |
| audioguru |
Posted - Feb 26 2011 : 4:18:47 PM
The old TDA2004 amplifier IC is no longer listed on ST Micro's website and is not stocked anymore at both of North America's biggest electronic parts distributors.
Some of them sounded pretty good with low distortion (0.1%) when they were played well below clipping where the output power is low. But their spec's showed fairly high distortion (1%) for some of them.
They roll off high frequencies at 15kHz (half power) so they are not "high fidelity".
My home stereo is a Yamaha "natural sound" receiver (that you don't like) and it sounds great. Its distortion is extremely low and it has a very wide bandwidth. It is so good that I don't listen to it and listen to the music instead. |
| Tda |
Posted - Feb 26 2011 : 3:22:10 PM
Hi,
I found this threat by looking for any reason why this dirty cheap TDA 2004 sounds pretty great....I ´m german please excuse some errors in typing..
Background: My Luxman L410 is not more working, i`m in process of repairing. I just used the Poweramp of it, cause the Preamp is completely cutting out dynamics and details, smearing the colours, makes it "white" and a little grainy. I drive the Poweramp "passiv" just over an extern poti from a HD 7525, still the best CDP I`ve heard. Today I got an used HD 970, I planned to use as extern DAC from PC, which I read a good DAC for the price. Just for the time without my luxman I bought a smaller Yamaha AX 380 at ebay to hear music and compare the players and another DAC.
The Yamaha "natural sound Amp" sounds completely terrible, hard, grainy, not transparent at all, even with "cd direct" in. The next Amp I have is a small Dynavox I just use at my PC, costs brandnew ~ 50$ or so...a cheap chinamade mini-amp with TDA 2004.
Here it comes...it sounds A LOT better than this ugly Yamaha....And I mean really a LOT. Cause it`s low Power of course at standard livingroom volume, but it is airy, transparent, very natural sounding, voices are realistic, there is nothing hard or grainy...a little bit tricky are the always active (a passive one...) tone controls, cause it`s not neutral in mid position, but I did a measure with ARTA to adjust neutral frequency response...and checked Dist. and IM either...
Besides the low power, this thing sounds really good. I have no glue why....there are cheap EL C`s in seriell to the speaker, there are cheap El C´s in the entry.....by the way, the TDA 2004 is stable down to 1.6 ohm.
I have to state, this dirty cheap thing sounds better than most consumer/mid class integrated amps, it sounds far better than the ugly preamp of the luxman l410, if you are satisfied with just normal volume it`s fine...I also read the most important watt is the first watt, cause most hearing at home is just at 1 watt power...
I don`t know why it can sound good, but it`s fact. I´m further surfing the web for tec`s about this chip. Of course it`s a bitter taste to spend hundreds or thousends of bucks if an IC for 1 buck is doing the job as near as good...
By the way, the HD 970 is far away from the older HD 7525, no chance to reach the same level of airiness and natural/analog sounding. Reason could be the 275 OpAmp, it`s said to sound laid back und tuby, there are much better replacement OpAmps (if one is happy to desolder a smd OpAmp..)I wait for the DAC from my friend to test, before any solder action starts.
michael |
| wasssup1990 |
Posted - Oct 18 2010 : 01:00:43 AM
quote:
Originally posted by audioguru
You should not ignore the truth.
John, as much we would like this to be the case, billions of people do it all the time. Only time can make this change, and I think you know what I am talking about, but that's off topic and I just had to mention it.
In this instance I think we only had hot-head on our hands. Nothing more, nothing less. Peter (B)astard is kaput from this forum.
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| JUAN DELA CRUZ |
Posted - Oct 17 2010 : 7:52:39 PM
quote:
Originally posted by audioguru
Was I being negative when I explained that the "10W" TDA2004 amplifier is very old and produces only 2.2W?
No, you wasn't 'sir'. 
You had just said the truth and nothing but the truth...
quote:
You should not ignore the truth.
Agree. We must accept the criticism around us. Its part of our development anyway . But of course there is always positive and negative one so it will depend upon our response to it. |
| audioguru |
Posted - Oct 17 2010 : 11:40:45 AM
Was I being negative when I explained that the "10W" TDA2004 amplifier is very old and produces only 2.2W?
You should not ignore the truth. |
| JUAN DELA CRUZ |
Posted - Oct 17 2010 : 12:49:02 AM
"Absorb the POSITIVE Criticism and Ignore the NEGATIVE Criticism". |
| wasssup1990 |
Posted - Oct 16 2010 : 10:33:31 PM
quote:
Originally posted by audioguru
Some people give "a warm and friendly greeting" to a nOOby. But usually it is just some text that was saved in Notepad and is not actually a warm greeting. I don't doo dat.
I don't think I will start giving "a warm and friendly greeting" from Notepad. When somebody posts an old and common project then I just say the facts.
Yeah I thought that quote he posted looked manufactured. |
| audioguru |
Posted - Oct 16 2010 : 5:35:25 PM
Some people give "a warm and friendly greeting" to a nOOby. But usually it is just some text that was saved in Notepad and is not actually a warm greeting. I don't doo dat.
I don't think I will start giving "a warm and friendly greeting" from Notepad. When somebody posts an old and common project then I just say the facts. |
| Aaron Cake |
Posted - Oct 16 2010 : 10:49:16 AM
Peter's account has been deleted per request. I agree, his reaction was odd and doesn't make sense to me. I know that nothing posted on a forum is ever to be taken as negative by default, because text is incapable of communicating emotions and always looks cold. |
| wasssup1990 |
Posted - Oct 16 2010 : 03:23:45 AM
FYI Peter B. I just realized that you posted a section of a response you got from your other forum on this forum. You shouldn't have done that if you don't want any of us to track you to where that was posted. Google can be your worst enemy sometimes. This thread turned up on Google not long after it was created. Given enough time your forum with that quote you posted will also show up in Google given certain conditions are met, and if you didn't fabricate that response you apparently received. |
| wasssup1990 |
Posted - Oct 15 2010 : 10:03:28 PM
You have the ability to remove your details yourself as well as remove this whole thread. It is left to Aaron to remove your account. I still don't see how someone could get so worked up over something like this. |
| n/a |
Posted - Oct 15 2010 : 1:00:24 PM
I haven't replied because I had no intention of returning, but having thought about it a bit I thought that copying and pasting the response I got from the other site I signed up to might be revealing. This is it in response to exactly the same post as I started with here:
Welcome Peter, we are always glad to have new people sign up and we look forward to you posting your projects here. Your TDA2004 project is interesting. You may already know that the TDA2004 has been around for quite a while, and that it has a pretty bad press. There are several TDA2004 projects listed here, but none so far that have been designed for domestic use and we will be interested to know how you are powering your amplifier if not from a car battery. So we would be pleased to see your project details and are sure it will attract a lot of comment.
Now that's what I call a friendly, encouraging response to a new member. Someone above mentioned criticism. Well at my age, I have taken all and given all that there is, but with the emphasis on constructive. Dismissive criticism is neither helpful nor polite and I have no time for it, which is why this web site is not for me and why I would like my details to be removed, so I should be grateful if someone could do it now beacuase this is definitely my last log on here. |
| audioguru |
Posted - Oct 13 2010 : 8:31:25 PM
I wonder why "Peter B" doen't reply? |
| wasssup1990 |
Posted - Oct 09 2010 : 8:35:44 PM
Yes I'm with you both. |
