Good for you jjue, it sounds like it's of the same family as Krell type power, with plenty of current.
Here is an Aussie review and test for you, I can't tell if it's bi-polar or mosfet output stage as they didn't do a 2ohm test on it.
http://i.nextmedia.com.au/avhub/australian-hifi_reviews_2013_2013-06_vitus_audio_ri-100_integrated_amplifier_review_lo_res.pdf
Cheers George
Here is an Aussie review and test for you, I can't tell if it's bi-polar or mosfet output stage as they didn't do a 2ohm test on it.
http://i.nextmedia.com.au/avhub/australian-hifi_reviews_2013_2013-06_vitus_audio_ri-100_integrated_amplifier_review_lo_res.pdf
Cheers George