A year ago I mentioned that Softube Amp and Bass Amp (comes with Reason 8 and higher versions) contains a bit of STEREO ambience sound. This means that it will turn any MONO source into a STEREO signal. And what is even cooler is that I was able to remove the direct signal so the ambience effect can be applied as an ambience reverb to any source. Voila: Softube Amp and Bass Amp as Send effects!
You can download the ReFill containing 2 Combinators for free:
Amp Ambience ReFill (104.3 KiB, 971 hits)