Wow an old album that rocked your world

Oh what about a "popular record"? Well. I never tire of the 1st Hot Tuna Album. BTW, If you've never attended a coffeehouse concert (as in a small restaurant/bar) overstuffed with people- you can hear and see everything up close,
it's just as great as any big rock concert venue, only different. I also saw Larry Coryell in a somewhat dumpy bar many years later. And John Hammond, too. There's nothing else like it. I'll bet the Beatles had a blast in those early days playing in small clubs even without getting paid the big bucks. 

@french_fries 
I saw Hot Tuna at the Lone Star Cafe NYC, very small venue, was standing at the bar about 6 feet from Jorma, hard to believe all that music is coming from one guitar.

As to rediscovery:
Blood Sweat and Tears/BS&T/God Bless the Child.
David Clayton Thomas fabulous vocals and the arrangement is top shelf.  Give it a spin. 

Wow, this is great.  Reminds me of how much great music I have not listened to in so long.  Time to dig these up.

John Lee Hooker & Canned Heat - "Hooker N Heat"
some of the best harmonica playing - 11 minutes of "Boogie Chillen" great!! 

I believe it was back in the mid 70's when hi-fi shops were plentiful before the big box stores ran them all out, I went in to one of our local shops to audition some JBL L-100's. The salesman put on Heart's Dreamboat Annie album, flipped the loudness switch on the Pioneer receiver and played the Crazy On You cut.  First time I ever felt bass pound me in my chest. From then on out I was hooked on audio.