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peranders 9th December 2006 06:10 AM

Balanced -> Unbalanced DRV134 the best?
I'm looking for alterantives to DRV134 for converting a balanced signal into an unbalanced one for feeding a power amp. DRV134 is wellknown but anyone who knows about any "high grade" alternative? It's also good if it can be found in SO08-14 or similar.

peranders 11th November 2009 11:21 AM


star882 11th November 2009 01:34 PM

All you need is a differential amplifier. But good amplifiers accept differential signals directly.

Minion 11th November 2009 03:53 PM

I"m pretty sure the DRV134 is for converting a Unballanced signal into a Ballanced signal not the other way arround ....

if you go to figure 2 on this page it shows how to use an opamp to go from ballanced to unballanced ...

Balanced Line Driver & Receiver


peranders 11th November 2009 03:59 PM

The topic is wrong... I ment as I wrote unbalanced to balanced.....

Minion 11th November 2009 04:04 PM


Originally Posted by peranders (
The topic is wrong... I ment as I wrote unbalanced to balanced.....

Sorta figued that .... Either way that same link has a good circuit for going Unballanced to ballanced , in my opinion better sounding than the DRV134 and really not much more complicated ....


Sawzall 11th November 2009 04:54 PM

THAT inc. makes a IC that has seen some print that its a better device than the Texas Inst. part, but I don't know if thats true or not. Given that most use the TI part for a pro audio use, not an audiophile one, its possible that a well designed descrete unit would be better - I looked at the issue when I was having a noise problem with a noisy ballast in my big inch TV. Sonically, it made more sense to fix the TV, so thats what I did. Either way, the chips are so cheap, build a prototype of each and test - the powersupply for the unit will cost 10 times the chip (which TI will sample).

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