Hi, new to hifi, Im on very tight budget for a party stereo at a back so used like 3 times a year at volume and hopefully capactor ageing wont be an issue, just big speakers on a small receiver.

Ive picked up these old (c.1980) 100w 8ohm speakers which sounded quite good on the seller's cheap receiver at low volume (didnt try high)
http://www.nrpavs.co.nz/JVCSK-1000II.htm
Made here in NZ (not sure if good or not lol) bt unfortunately just with spring clips with tiny openings, hopefully i can get thick enough wire in for a 5m run, 18AWG?

They are heavy beasts, 21kg and 65cm high

Anyway , do you think an Onkyo 313 (65w @ 8OHM) would be able to power them at party levels without distorting noticeably or going kaput? There will be no other speakers attached, just 2 x 8OHM 100w in stereo, I would get any old garage sale receiver but got the Onkyo as I want USB for digital connection rather than reduced SQ from smartphones /ipod via RCA adapter cable

The receiver is Onkyos bottom end and has lots of functions I wont need but only supports 65w @ 8OHM, is this enough for quite loud or will it maybe damage the reciver or sound bad? No idea , I just want cheapest way to play digital music files on phones etc to these big speakers, without losing sound quality.

The volume wont be teenager doof doof loud, just middle aged people having a party with rock music etc with one speaker placed outdoors