Battery powered XO?

MikeHunt79 · 17th March 2008, 01:50 AM

I'm planning to make a small active crossover, which will be used in a battery powered player I'm building.

Basically it will sum L&R then split the signal at 120Hz.

Anyway, i was wondering if I could somehow power this thing using 2 x 9v batteries one for each rail on the op amp.

The only thing I can think of is that the + and - voltaes may not always be equal, so would it be worth using something like a 7805 on each rail?

Conrad Hoffman · 17th March 2008, 01:53 AM

Op-amps are quite tolerante of unequal supply voltages. I'd rather have the higher rail voltage and not bother with the regs. Choose your amps carefully for low power draw, and obviously the other parameters you need.

MikeHunt79 · 17th March 2008, 03:19 AM

Ok, dual 9v pp3's it is then.

I'll be sure to check the specs, and also for DC offset when trying it out...

17th March 2008, 01:50 AM	#1
MikeHunt79 diyAudio Member Join Date: Aug 2003 Location: Bristol, UK	Battery powered XO? I'm planning to make a small active crossover, which will be used in a battery powered player I'm building. Basically it will sum L&R then split the signal at 120Hz. Anyway, i was wondering if I could somehow power this thing using 2 x 9v batteries one for each rail on the op amp. The only thing I can think of is that the + and - voltaes may not always be equal, so would it be worth using something like a 7805 on each rail?

17th March 2008, 01:53 AM	#2
Conrad Hoffman diyAudio Member Join Date: Mar 2007 Location: Canandaigua, NY USA	Op-amps are quite tolerante of unequal supply voltages. I'd rather have the higher rail voltage and not bother with the regs. Choose your amps carefully for low power draw, and obviously the other parameters you need. __________________ I used to be an audiophool like you but then I took an arrow to the knee.

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
Battery powered amp	Shpoop	Chip Amps	8	26th January 2007 04:41 PM
anyone using a battery powered pre?	whatsnext	Solid State	15	30th October 2006 12:26 PM
Battery powered PC ?	percy	Everything Else	15	7th March 2006 08:24 PM
battery powered gc in a tin	digi01	Chip Amps	11	25th December 2004 05:11 AM
DC-33 DC Battery Powered Amp??	moe29	Pass Labs	2	26th April 2004 07:41 PM

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


	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

17th March 2008, 03:19 AM	#3
MikeHunt79 diyAudio Member Join Date: Aug 2003 Location: Bristol, UK	Ok, dual 9v pp3's it is then. I'll be sure to check the specs, and also for DC offset when trying it out...

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