Greetings tubemongers!
Your contributions to the world of tube topology are appreciated by lurkers everywhere.
THis is is intro/question. TLDR
is at the bottom 
AS a boy I was in LOOOOOOOVE with speakers. LOOOOOOOVE!
Having no resources (OR REFERENCE MATERIAL) I experimented, taking 6x9s from a junk car for example LOL. With these and some 5gal buckets and pipe I designed something akin to a sixth order bandpass at age 14
wow it sounded great (as my urbanite cousin rolled on the ground laughing because his father had given him a Marantz from the 70s)
Then there was the suitcase PA I got at a rummage sale for $5. My first tube device. Complete with pair of 6" CTS alnicos it was the best woofer setup I'd ever heard, even impressed my cousin.
Unfortunately it was lost over time after becoming extremely hot during operation (I had no idea what a tube was or how caps worked)
I did keep the speakers but no other amplifier EVER reproduced the original sound.
Now I came here via the world of guitars. My starved 12AX7 modeller needed a new tube and I bought a small lot of used of Epay.
The testing went... meh... meh... what the.....HOLY CRAP!!! WHERE HAVE VINTAGE TUBES BEEN ALL MY LIFE?
Ironically the winner wasn't a fancy Mullard, Amperex, Ken-Rad, but a short grey plate RCA from the late 60s.
stricken 
Now I've been collecting old Hammonds for parts and have managed to get a good stock of components.
Just last week I got something with 24x RCA long black plate 12AU7
Hopefully a lifetime supply!
The problem comes in finding the specific properties of any given OPT.
I've only built things (not tube circuits) from new or known components.
TLDR
Would you please give me some advice on building a 100 +W tube amp to run a subwoofer?
I know that's a vague question. Unfortunately I'm half pro/half newb
My current list of components are basically standard audio tubes EL86, 12AU7, 6V6, 6SN7, 12AX7, 7591, some rectifiers 5GB4, GZ34, 5Y3 ?
All the speakers were 8ohm wired except a HR-40 amp which runs 4 x 6V6 into a 2 ohm load. It was only advertised as 20W output though.
I picked up some 25DN6 and a couple others from the TV tube thread but no sockets yet.
Advice or a proven circuit?
Speaker can be wired either 2ohm parallel coils or 8 ohm series coils.
Your contributions to the world of tube topology are appreciated by lurkers everywhere.
THis is is intro/question. TLDR
AS a boy I was in LOOOOOOOVE with speakers. LOOOOOOOVE!
Having no resources (OR REFERENCE MATERIAL) I experimented, taking 6x9s from a junk car for example LOL. With these and some 5gal buckets and pipe I designed something akin to a sixth order bandpass at age 14
Then there was the suitcase PA I got at a rummage sale for $5. My first tube device. Complete with pair of 6" CTS alnicos it was the best woofer setup I'd ever heard, even impressed my cousin.
Unfortunately it was lost over time after becoming extremely hot during operation (I had no idea what a tube was or how caps worked)
I did keep the speakers but no other amplifier EVER reproduced the original sound.
Now I came here via the world of guitars. My starved 12AX7 modeller needed a new tube and I bought a small lot of used of Epay.
The testing went... meh... meh... what the.....HOLY CRAP!!! WHERE HAVE VINTAGE TUBES BEEN ALL MY LIFE?
Ironically the winner wasn't a fancy Mullard, Amperex, Ken-Rad, but a short grey plate RCA from the late 60s.


Now I've been collecting old Hammonds for parts and have managed to get a good stock of components.
Just last week I got something with 24x RCA long black plate 12AU7
Hopefully a lifetime supply!
The problem comes in finding the specific properties of any given OPT.
I've only built things (not tube circuits) from new or known components.
TLDR
Would you please give me some advice on building a 100 +W tube amp to run a subwoofer?
I know that's a vague question. Unfortunately I'm half pro/half newb

My current list of components are basically standard audio tubes EL86, 12AU7, 6V6, 6SN7, 12AX7, 7591, some rectifiers 5GB4, GZ34, 5Y3 ?
All the speakers were 8ohm wired except a HR-40 amp which runs 4 x 6V6 into a 2 ohm load. It was only advertised as 20W output though.
I picked up some 25DN6 and a couple others from the TV tube thread but no sockets yet.
Advice or a proven circuit?
Speaker can be wired either 2ohm parallel coils or 8 ohm series coils.