transformerless

What is the difference in sound between a transformer and transformerless mic. Why would someone choose to use one or the other and is there a more specific micpre that goes better with either?

An electronic circuit capable of outputting or receiving a balanced audio signal without the use of a magnetic transformer.

I see there are a lot of 'what mic should I buy' questions here, so apologies in advance for yet another one...

hi i've been searching for quite a while now for a good versatile transformerless valve D.I for bass keyboards and all
do you guys offer anything like that/?
i like transformerless for its tight response

Hi

This is a subject that has been talked about already (maybe), but I'd like to know where I can find some knowledgeable infos (web sites, books...apart from this site :D ) about these two different design ethics, so that I'll be more conscious when I'd shop for a new preamp (or mic).

Thanx

L.G.