LIO is a significant upgrade in every possible way! (except if you prefer the smaller box size of the RWA Sig 30.2)
I'm not even sure where to start.
- Improved power supply (ultracapacitor-based instead of battery based)
- Improved preamp stage(s) (there are 3 options available with LIO, and even the 'entry level' RVC + Tubestage is
much better than the Sig 30.2 remote Alps pot and single-tube buffer)
- Improved dac, phono and HPA stages (And these were not even options with the 30.2)
- Improved speaker output stage, etc.
- Much more functionality on the front panel and remote.
- Modular design so you can upgrade or add modules later.
- Better built quality, better layout, better components...
The ultracaps are superior to the LiFePO4 batteries in the RWA LFP-V Editions. Lower output impedance
(higher peak current), much longer lifespan...
As for as how they they compare sonically, the only way to find out is to listen to LIO one day in your system.Customer feedback: http://www.vinnierossi.com/customer-feedback/Reviews: http://www.vinnierossi.com/professional-reviews/Show Coverage: http://www.vinnierossi.com/show-coverage/
Having said all of this above, you mentioned:
I've been so happy with my RWA Sig 30.2 for the past 6 years;
I am very pleased to hear this, and besides having to change the battery at some point, I'm sure you'll get many more years of enjoyment out of your Sig 30.2! So if you are curious about LIO, when the time is right for you to purchase, please email or call me and I'll be glad to answer any questions that you may have. With a 30-day refund policy, you can compare them both in your system.
Hope this helps,