Yeah, in a live setting with louder, more forceful music, phasers - to this day - can be tricky as they have you sacrifice a lot of punch. You're better off with a flanger or a chorus though the effect isn't quite the same.
For the same reason, Jon Lord gave up using Leslie Cabs when DP's music got louder with In Rock and amped his Hammond through Marshall guitar amps which gave him that direct roaring sound - the "
Gorgan" as he would jokingly call how his Hammond and Blackmore's Strat sounded together.
In Rock, Fireball and Machine Head were all recorded with that
Gorgan sound, he only reverted back to Leslie Cabs with Who Do We Think We Are and later on in the Mk III era because he felt his sonic role in the band had changed and the multiple riffing in Purple's music was no longer as prominent.
If you listen to anything from Bob Dylan's Rolling Thunder Revue mid-70ies, the whole band is
absolutely drenched in phasing effects.
Even Rob Stoner, the bassist, let that stomp box run all the time.
(Wow, that's Mick Ronson in that vid, I knew he played with Dylan on some legs of the Rolling Thunder Revue, but I've never seen footage.)I guess the mid-70ies were just the era of the phaser. I got mine around that time too - bought it used off my Jazz Rock/Weather Report-adoring bass teacher. Poor Lothar always gulped when I told him that my bass heroes were Glenn Hughes, Roger Glover, Alan Lancaster, Jim Lea, Martin Turner and Gene Simmons (all pick players - which he hated!). He tried to acquaint me with Jaco, my young ignorant self remained utterly unimpressed. I believe I was his most disappointing pupil ever.
He did teach me the circle of fifths and lots of scales though, I'm eternally thankful for that.