The most powerful amplifier for my application

[john_lenfr]

3 questions:

First:
I search for the most powerful amplifier in ONE package?
(I know that there is parallel and bridge modes but I want to know what is the reference of the most powerful amplifier.)

Second:
It is to build a 2*200W(without distortion) to 2*300W amplifier (for 200W speakers).

I thought: 2 TDA7293 in parallel and/or bridge mode.

Third:
Can I have 200W with 2*TDA7293 in parallel mode?

 

[jaudio]

Looking into the stk series of chip amp.


3 7293 in pallalel for 200w into 4ohms

 

[RCBandwidth]

Very High Power OP-Amp

Heres a link to very nice High Power OP- Amp:
I use one these to power a Parts Express 15 inch Titanic MK111.I have 2 of these two left for future projects.

http://eportal.apexmicrotech.com/mainsite/products/pages/op_amps/pa03.asp

 

[carlosfm]

$$$$$$$



http://eportal.apexmicrotech.com/ep...tion=&find_category=*ALL*&find_part_desc=PA03

 

[jaudio]

WoW! for that price, you can buy several UCD*** digitial amps.

 

[RCBandwidth]

Expensive?....no way

They certainly are expensive...These amplifiers were ordered for a work engineering project that never came to fruition...My cost was a whopping 0$...... Bob C.

 

[jaudio]

What project have you used them in?

 

[RCBandwidth]

Jaudio:As I stated in an earlier post,I am using one these to Power a 15 inch Titanic sub(PE).I am using +/- 60 volt supply rails . Bob C.

 

[john_lenfr]

WOW!

700$ ?!?

It's very expensive for me!

I forgot to give you the price: up to 200€ (so approximately up to 200$)

So, I probably chose 3*TDA7293 in parallel. (But what about the bridge mode?)

I took a look on the UCD modules, they are very interesting but can I bought them in France? or it is only by internet?


@ RCBandwidth: Have you got a diagram of a "HI-FI" application with the PA03? (I want only to know how we can do an application with this part) And how about cooling with this?

Thanks for your answers....

others?

 

[jaudio]

You can add drv134 with two set of parallel 7293 chips.

Read this post.

http://www.diyaudio.com/forums/showthread.php?s=&threadid=23455&perpage=10&highlight=&pagenumber=1

 

[EWorkshop1708]

My subwoofer amp I have now is an STK 4231-II that's rated to drive 2 channels, 8 ohms/ch @ 100W. I parallelled the two channels to run a 4 ohm 12" subwoofer, and it's powerful.

Look around for a few cheap older STK chips, it's easy to get 200W with just one chip.

 

[jaudio]

stk4050 200watt min


home.eunet.cz/rysanek/pdf/stk4050ii.pdf

 

[kanaddict]

I forgot to give you the price: up to 200€ (so approximately up to 200$)

others?

Take a look at :

http://www.41hz.com/main.aspx?pageID=87

Could be interesting for you.

Regards,

 

[john_lenfr]

@ kanaddict:

Very interesting prices.

But pcb is a bit large.

 

[john_lenfr]

Sorry! I I badly read.

It is compact, 130 by 100 mm .

Thanks for the link

 

[kanaddict]

Sorry! I I badly read.

It is compact, 130 by 100 mm .

Thanks for the link

You are welcome 😉

If you build it, please post a little review (Class D section). The 41hz boards get a lot a attention & I'm sure that many peoples would like to read more information about how they sound.

Bonne chance dans ton projet !

 

[john_lenfr]

Thanks.

I took a look at the UcD400 modules.

I want to do a stereo version with 2 modules.

 

[tgalla01]

I'd go for the stk4050v's, just finally finished my amp /w 4 of them.

Good news, they can put out a ton of power. Bad news, I toasted the voice coil on my 8 ohm 15" vega. Even though I was sad for the loss, I was impressed my amp toasted a 500W RMS / 1000PK sub after a few minuites.

I was running 2 bridged stk's to each channel, +/- 80V rails (switchable to +/- 40 by button in my PS for normal lower power use.) My advice if you use them is make sure you have good heatsinking /w forced air cooling if you run high rail voltages.

I figure rough estimate power while bridged, 160V / (8ohm sub + 4 ohm amp int) = 13.3A*160V= 2130Watts peak, so maybe half that rms possible or so. I guess that explains toasting the sub, even though I was keeping the volume down to prevent bottoming it.

good luck.

 

[FASTBACK]

tgalla01

Can you provide the schematics of your sub amp using 2 stk4050v in a bridged configuration.

Thanks

 

[tgalla01]

I'd help you out if I knew more about bridging, but while I was testing my amp I was just cheating to bridge it. As you probably know, to bridge 2 channels of an amp, you need the signal to one channel inverted and the other channel regular phase, and connect your speaker across the output of both channels.

For since my amp was 4 channel, 2 channels were standard and 2 inverted. to get the signals I used my laptop playing music in Winamp. I ran a DSP plugin that allows you to invert one channel, so my left channel was standard and right inverted, that's how I 'bridged' my amp for testing, and then connected each speaker to a left and a right channel. Next I will have to find out how to invert the signal internally in the amp... Upon searching stk4050v in the forum I'm pretty sure one of the few topic results had details on an easy way to bridge the modules using the output of one stk4050 to feed the other channel.

If you find anything on an easy preamp that provides a regular and inverted output, let me know.