Appropriate Power for 1.7i's


I am sure this is the type of question that gets asked a lot, so I beg your indulgence for one more:

I have recently upgraded my speakers to a pair of Magnepan 1.7i's.  I am enjoying these speakers even though I know they are not receiving an optimal signal.  My goal is to provide a better signal.
 
My primary source is TIDAL HiFi, and here is my current setup

Power:  Yamaha HTR-5450 (only front channels used).  Ostensibly 85 w/channel --- I am aware that the specs for home theater receivers tend to be -ah optimistic.

DAC:  ifi nano iDSD (burr-brown)

Digital signal provided by PC

My budget for upgrading the Yamaha is modest:  $700-$900

Here is my want list:

100+ w/channel Stereo into 4 ohms.  ( I have no need for more channels):  Preferably Class A/B  (as opposed to D)

I am not opposed to purchasing used, in spite of the additional effort involved.

I am considering the Denon Heos and  Sonos Connect as a preamp.  I am not opposed to an integrated amp, but I like the fact that these units allow me to control my selection via a phone app (my phone is an LGv20 w/ Android 7).  Since I tend to listen to albums rather than individual songs or even playlists, the lack of this convenience is not a deal killer for me.


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Mark, the Parasound A-23 doesn't mate well with the 1.7, it sounded flat.  I ended up with a McCormack DNA-1 which has depth and power.


The McCormack is a good suggestion. I'm surprised to hear about the A23 sounding flat - the cheaper HCA-1000A was a great amp for Maggies. I have the HCA1500A now and it does lean towards warm and a bit soft on top, but it controls bass very well. 

I do not like NAD with Maggies. They have this weird power limiting feature where their output doesn't increase into 4 ohms plus they just aren't in the right league.

I've also tried Wired4Sound. Didn't do it for me. Class D audio - not too bad, better than W4S.

Jolida JD1000BRC - not enough power and lacked midbass energy plus rolled off on top.

Adcom GFA5400 - Very extended top end. A bit brittle sounding and lacks some bass control.

Adcom GFA5500 - Dull, dull, dull - not even similar to the 5400.

Sonographe SA250 - Lacks dynamics and sparkle.

Odyssey Stratos - actually this is quite a good option, see if Klaus can do dual mono power supplies in it.

What do I want to try - Pass Labs. Just a tad pricey though.

I have made a potentially expensive error. I found a DNA-1 on e-bay and made a bid. I later discovered that the amp is configured as a bridged monaural. (Thought it has L & R outputs, I noticed later that it only had inputs for one channel). Can this be ’Unbridged’ ? If so how expensive would that be?

(Feeling pretty stupid here, boss :D Maybe I won’t win the bid. It’s OK. Have a good chuckle at my expense)

I have sent an inquiry to McCormick (the brand is defunct after being acquired by Conrad-Johnson, but they still do mods/repairs)


Thanks, Raindance and 4hannas, for sharing your experiences.  Most helpful.  If the DNA-1 does not work out, I may try the Stratos.  There seems to be a paucity of used units, so I may bump the budget and buy new.  I did find a pair of platinum mono amps for 1,700.  If they are still available in a couple of weeks I may pull the trigger. 

There is also a Luxman M-117 out there for 600.  What do you think of that option?