BGR Mosfet 400w Amplifier KIT - diyAudio
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Old 24th January 2008, 11:01 AM   #1
dmcabs is offline dmcabs  Australia
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Question BGR Mosfet 400w Amplifier KIT

I saw this Amp Kit on eBay...

http://cgi.ebay.com.au/Mofet-400-400...QQcmdZViewItem

Has anyone built one?

I'm looking for a diy kit for my rear speakers that's not too expensive.

There are some NAD 3020 clones on ebay too. Are they pretty good?
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Old 24th January 2008, 11:31 AM   #2
Donk is offline Donk  Europe
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I visited the sellers diy amp kits.
There is something big joke here...

700W-RMS with two pair of Sanken BJTs?! ("BGR Blazer St Pro").
SOA?!
700W/4Ohm (150Vpp) from a 70+70=140V supply?

2SK1357 as output devices for his mosfet diy kits?! These are 900V/5A/125W devices for switching applications, aren't good for audio outputs!
SOA?!

BGR Blazer X-10 1000W:
1000W (180Vpp) from a +/-70V supply?!

Etc...
Etc...

Crazy things! Crazy...
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Old 25th January 2008, 05:24 AM   #3
dmcabs is offline dmcabs  Australia
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A had a feeling the output specs were "optomistic"!
Even if they are half that, not too bad...

What about the NAD 3020 Clone?
http://cgi.ebay.com.au/ws/eBayISAPI....MEWA:IT&ih=002
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Old 25th January 2008, 07:37 AM   #4
poynton is offline poynton  United Kingdom
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Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)
3020 is low power.

If you're looking for an amp, you could try these from Sure Electronics.

They even have their own thread :-

Sure-Electronics.com class d amps



Andy
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Old 27th January 2008, 08:53 PM   #5
dmcabs is offline dmcabs  Australia
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Thanks for the link Andy...

I am looking for a Kit with very good specs and sound. (Need some fun you know!!!)

I found the specs on the 3020 and 20W is a little bit low for my setup.

There are kits of the NAIM NAP 140 out there. 40W RMS. BJT amp.
Looks nice! Do they sound sweet? Any idle noise?

I have an old AEM6500 amp kit (mono) and a Playmaster 200 series. The AEM6500 has NO noise whatsoever, but the playmaster has always been noisy (bit of an antenna!)

The BGR amp in my first post is based on the Citation 12 but the Mosfet types do look odd.
Is the IRFP240 a better choice for that design? Or some other MOSFET?

I am just looking for 2 more channels for rear speakers to complement my mosfet amps. Both use 2SJ49 & 2SK134.

The Playmaster drives my fronts and the AEM6500 for the centre channel.

Thanks for everyone's help...
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Old 9th February 2008, 08:21 PM   #6
TheMG is offline TheMG  Canada
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I had come accross the same kit on ebay. Yeah, the specs look quite ambitious. Even if this thing really only puts out 100W RMS, that's fine by me though. I'm on the lookout for a nice decently powerful kit that's cheap and sounds good.

So what I'm wondering is, what's the sound quality from this thing? I gotta say I'm a bit skeptical.

I was also thinking about this: http://cgi.ebay.ca/TDA7294-Integrate...QQcmdZViewItem

Looks like a better choice. I was actually planning to design and build my own using the same chip, but that kit does look decent, and since I don't have unlimited time for this project it would be perfect.
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Old 10th February 2008, 01:31 AM   #7
crt is offline crt  Indonesia
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As far I know, BGR is product of BELL.
And "BELL" factory is in surabaya.
I have going there twice, they are Home Industry (or something like that).

About the sound quality. I HAVE NO COMMENT!
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Old 10th February 2008, 04:53 AM   #8
TheMG is offline TheMG  Canada
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Quote:
Originally posted by crt
About the sound quality. I HAVE NO COMMENT!

And by that do you mean it sounds like crap or you just don't know?
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Old 10th February 2008, 03:48 PM   #9
crt is offline crt  Indonesia
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Before I know DIY AUDIO, i'm fan's of them.
I have Test 2 different amp (BGR product),
But after I taste the amp like symasym and DX HRII.

I WILL NEVER COMING BACK TO THIS PRODUCT!
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Old 19th February 2008, 05:25 AM   #10
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Hai Pa... CRT,,, Please just buy the PCB of ( Blazer or Raksasa ) don't buy the kit! so you can choose the good spare parts for that PCB and test the sound ! after that you can say I love Indonesia Product!


regards
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