Chip Amp Photo Gallery - Page 131

AndrewT · 29th December 2009, 10:55 AM

why do you want to parallel a pair of 8ohm drivers to give a 4ohm load and then give yourself the difficulty of designing a current limited chipamp that can adequately drive that low impedance load?

Use two amplifiers, each designed to drive an 8ohm load and dedicate one amp to one driver.

Fit each driver to it's own separate volume inside your box (sealed or vented) and if one driver or amp goes faulty you can still reproduce live music, just not as loud.

Pato666 · 29th December 2009, 11:28 AM

Thanks AndrewT for helping me how to plan this amp. You have a good idea

, in the case of two bridged amp, i think i'll have to move to LM3886 chipamp. Thanks a lot guys.

danmartin · 30th December 2009, 04:51 PM

Hi to everybody...

Here is my first LM3886 Chip Amp using PCBs Kit from: eBay Store - HiLife-store: DIY-Audio

Most part are recycled except for the input/output connectors,
The chassis was built in the steel plate of the 360 x 280 mm
The cover is from an old Video Cassette VHS Player
The power switch and AC Socket is from a died PC AXT power supply
The split/dual pot volume control & knob was the a cassette deck.
The power supply is a transformator 2x20V 5A.
The front plate is made a piece 5mm thick of aluminium and black anodize finish
I really had fun with the amp. The sound is clean and fast
Thank you to the diyAudio community for providing me information to build this project,
Happy new year everyone

Sorry, my english is not so good

danmartin · 30th December 2009, 04:53 PM

Other views

Puffin · 30th December 2009, 05:23 PM

Quote:

Originally Posted by danmartin

Other views

Sounds bad then ?

wim · 30th December 2009, 07:17 PM

Nice work Danmartin.....

My last little job: Peter Daniel boards with LM3875TF.

Power supply 2 x 120 VA. In plastic box, not interesting to show.

Sounds great.

The little VU-meters (with backgroundlight) are used becouse i had them laying around and they are nice to see, but they are no big deal.

Pato666 · 30th December 2009, 07:59 PM

Very good danmartin! Muy bueno!
Thanks for sharing your work.

lanchile · 31st December 2009, 02:40 AM

Hello I just add more juice to my integrated chip-amp.I had two "extra" Mundorf caps. so Now it has 20000uf per channel.The sound is wonderful.

lanchile · 31st December 2009, 02:42 AM

More pictures.

Pato666 · 31st December 2009, 02:51 AM

nice knobs!

29th December 2009, 11:28 AM	#1302
Pato666 diyAudio Member Join Date: Jun 2008 Location: San Juan	Thanks AndrewT for helping me how to plan this amp. You have a good idea , in the case of two bridged amp, i think i'll have to move to LM3886 chipamp. Thanks a lot guys. __________________ A word about me and my projects http://www.cristianortegadelrio.com [Brand new site!]

30th December 2009, 07:59 PM	#1307
Pato666 diyAudio Member Join Date: Jun 2008 Location: San Juan	Very good danmartin! Muy bueno! Thanks for sharing your work. __________________ A word about me and my projects http://www.cristianortegadelrio.com [Brand new site!]

31st December 2009, 02:51 AM	#1310
Pato666 diyAudio Member Join Date: Jun 2008 Location: San Juan	nice knobs! __________________ A word about me and my projects http://www.cristianortegadelrio.com [Brand new site!]

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29th December 2009, 10:55 AM	#1301
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	why do you want to parallel a pair of 8ohm drivers to give a 4ohm load and then give yourself the difficulty of designing a current limited chipamp that can adequately drive that low impedance load? Use two amplifiers, each designed to drive an 8ohm load and dedicate one amp to one driver. Fit each driver to it's own separate volume inside your box (sealed or vented) and if one driver or amp goes faulty you can still reproduce live music, just not as loud.