Responses from daledeee1

Picking Speakers 20k-30k
Horns.  I think it gives lots of flexibility i.e amp size.  Fleetwood and Volti come to mind.  
Passive preamp
I went through this a few years ago. I think whether you want passive or active, depends more on the efficiency of the speakers and second the amp specs, input and output sensitity. I found a very good explanation of different types on the Goldmun... 
So you just took a gummie...What song is on the menu?
Kraftwerk 3D Katalog Zhu Polyrhythmics Caldera Sgt Pepper  Peter Gabriel 3 Talking Heads Remain in Light    
Curious to know what you guys think/like about Pink Floyd's early work
My roommate in college played DSOTM all night while we slept. I liked the album. I bought their catalog. Never could get into anything before Meddle. The WYWH album is also a fav. I like their live albums as well. David Gilmour also played the old... 
Will there be a dramatic difference?
I believe that is the name of the company.  The owners manual will give you the info you need. I had a couple Carver amps back in the day.  Pretty good for 35 yrs ago and decent prices. The A 21+ is on the warm side sound wise like the Carver.  
Can you give me your speaker suggestions?
But, if you want to keep your amps, be careful with speaker selection.  I like the idea of high efficacy speakers.  This makes amp selection easier.  
There's No Question
I too went for value over looks, Crites Type B.  They are the size of Cornwalls with better crossovers and cabinests(birch plywood.  They are not braced internally. I have seen finished examples are quite good looking. I  chose these for efficien... 
Your experience of moving to two subs
I have 2 subs-10" Eminence.  We run these with a Yamaha power amp, commercial.  I have never ran out of power.  I have a Marchand  crossover to make sure the level is right for subs and mains.  The crossover is at 100 Hz.I don't have phase adjustm... 
Fuzzy playback
Just an update;  I got my crossover back after the jacks, cord and volume controls were replaced.  Really nice results.  More presence, wider sound stage.  I am not sure how this all breaks in but it sounds better than ever right now.  
Hidden Gems in Classic Rock Albums
David Bowie: Station to Station. Phil Manzanera: Diamond Head.  Eno on a rock album 1975 Zappa: numerous Camel: Moonmadness and Mirage  
Bluesound Node 2 producing distortion and dropouts
Interesting.  I got my crossover back and thought it was just everything breaking in. Yesterday, clear as a bell. I have 3.20.5.  Brand new update?  Also, I put an aftermarket power supply in mine.  The vendor stated the original power supply caus... 
Another "Best" amplifier Question.
It seems like you like the Yamaha.  Not sure how often those come up used.  There are several good sounding amps at modest prices.  Schiit, Parasound, several Class D amps, Rogue, and more.  Emotive sound shrill.  
Songs with excellent advice?
Cats in the Cradle Harry Chapin Day in the Life Beatles  
Goodbye Everyone
I enjoyed the posts.  Best wishes  
Real world Loudspeakers what does very good cost ?
I personally think start with an efficient speaker. This gives you much more flexibility with amps at least. Volti, Fleetwood are a couple good examples. Used is rare. Both are made in USA. Others DeVore, Charney are excellent as well. These all ...