Speaker Recommendations for my Vintage Marantz 2270 and Miracord 50H MK II

Mapleshade speaker cables are great with vintage gear, both sonically and functionally...

If memory serves me correctly, the 2270 was bit if an anomaly when it came to 4 ohms vs 8 ohms output.  The Julian Hirsche review measured the 2270's output as 46 wpm into 4 ohms.  Opposite of what you would expect

In any event, I used a Marantz 2245 for years with modern era speakers. I found the best pairings to be:  http://www.nhthifi.com/products/10668-classic-three-bookshelf-loudspeaker#specs NHT SB2 (I would go for the Classic 3) and the http://omegaloudspeakers.com/super3i.html Omega Super 3i (I would go for the Super 7 monitor mk2.

I never tried the Marantz with a floor stander, only monitors.  

What would interest me, if you would want to try an old school designed, new speaker is the http://directacoustics.com Direct Acoustics Floor Stander.  

Rich 

does anyone know if the Avid 102 tweeter is the same size as the Avid 103 tweeter ?...thanks

" Yes, I seen this too.  But the fact that this receiver puts out the same amount of power into 4 ohms as it does 8 ohms tells me it has a very limited power supply.  A 4 ohm speaker could suck the life out of this receiver in a hurry."

NAD has been using that design philosophy for few decades. 

" Most modern amps can almost double their wattage into 4 ohms as opposed to their rating into 8."

As many know on this forum and elsewhere, "some" of these amps have "skewed"(conservative) 8ohm specs to appear that they double down into 4ohms.  They are beefy indeed and can drive most speakers with ease but don't truly double down when a controlled and accurate bench test is performed.
  
" If it was me, I wouldn't trust a vintage receiver with a true 4 ohm speaker." 

Now with that said, a 40 year old receiver may not be the "best" choice for true 4ohm speakers.

Bill