mono power amp using LM4780

hypnotize · 6th February 2005, 03:57 PM

Hi
I need to constract a high power mono power amp for my bass guitar (I already have a pre-amp). I need at least 250-300W because I have a 400W 4 Ohm bass driver and I want to kick it...
My main idea is to use LM4780 with parallel connection, but I need two chips to get high power. How can I connect two LM4780 in parallel without any current problems?

By the way, I have plenty of supply voltage, approx. +-100V 10A.

pinkmouse · 6th February 2005, 04:04 PM

You have far too much supply voltage! The LM4780 is rated as +42v,-42v rails maximum. Sorry...

hypnotize · 6th February 2005, 04:28 PM

You are right, I ment I have plenty of input power, regulated.

tlmadsen · 7th February 2005, 07:25 AM

See my reply about paralleling in :

Can you tell me how to beef up PA100?

Have fun

Thomas

Upupa Epops · 7th February 2005, 07:50 AM

With two pieces of LM 4780, connected in parallel/bridge configuration, you can get app. 200-220 W / 4 Ohm, not more ( for safety operation ).

6th February 2005, 03:57 PM	#1
hypnotize diyAudio Member Join Date: Jan 2005 Location: Tel Aviv	mono power amp using LM4780 Hi I need to constract a high power mono power amp for my bass guitar (I already have a pre-amp). I need at least 250-300W because I have a 400W 4 Ohm bass driver and I want to kick it... My main idea is to use LM4780 with parallel connection, but I need two chips to get high power. How can I connect two LM4780 in parallel without any current problems? By the way, I have plenty of supply voltage, approx. +-100V 10A.

6th February 2005, 04:04 PM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	You have far too much supply voltage! The LM4780 is rated as +42v,-42v rails maximum. Sorry... __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

7th February 2005, 07:25 AM	#4
tlmadsen diyAudio Member Join Date: Aug 2003 Location: Roskilde - The vikingships	paralleing See my reply about paralleling in : Can you tell me how to beef up PA100? Have fun Thomas

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
43v SMPS for dual bridge mono LM4780	juan_caliente	Chip Amps	45	2nd May 2010 10:37 PM
LM4780 dual mono -- boards	jackinnj	Swap Meet	1	1st October 2008 12:44 AM
input coupling capacitor VALUE & BRAND for mono LM4780	nickthevoice	Chip Amps	4	13th May 2008 12:57 PM
LM4780 Bridged Mono (136 watts of pure energy! ;-) )	DJ Exprice	Chip Amps	25	17th July 2006 09:30 AM
lm4780 Dual mono kit from audiosector?	Nickzz	Chip Amps	2	10th March 2006 01:32 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

6th February 2005, 04:28 PM	#3
hypnotize diyAudio Member Join Date: Jan 2005 Location: Tel Aviv	You are right, I ment I have plenty of input power, regulated.

7th February 2005, 07:50 AM	#5
Upupa Epops diyAudio Member Join Date: Aug 2003 Location: Prague,Czech Republic	With two pieces of LM 4780, connected in parallel/bridge configuration, you can get app. 200-220 W / 4 Ohm, not more ( for safety operation ).

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read