Of their earlier albums, 'Progressions Of Power' is probably their most balanced, and despite this album reaching #32 on the charts, it wouldn't be until their next album that things took off for Triumph.
1983's 'Never Surrender' was this Canadian trio's follow-up LP to the excellent 'Allied Forces'. I think it would be easy to say that following up with a new album after 'Allied Forces' was a hard ask, such was the bar being set very high with that album. Did 'Never Surrender' equal or surpass its predecessor? In my humble judgement, I would say no.
'Thunder Seven' ranks in my top 5 Triumph albums of all time, and though not as successful as their other albums up until then, sonically this had a great production, all thanks to Eddie Kramer no doubt. If you've ignored this album in the past, get re-acquainted with it once more.
By this stage of Triumph's career, the band had arrived at the crossroads of dysfunctionality. Though 'Surveillance' is my favorite album, it's certainly one that the band themselves don't rate, for the reason that it wasn't a cohesive or 'band' album.