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If you love SET amplifiers, boy do I have speaker for you.

I have had in-house for the last six weeks a pair of speakers that I'm reviewing for hometheaterreview.com from NSMT Loudspeakers, located in North Carolina, that are a perfect match with SET amplifiers.  I love SET amps.  However, historically I'm not a fan of single driver designs (rolled off high-end/lack of bass) or horn designs (I find them to have coloration that annoys me after a short while) that are normally used with beautiful sounding SET "Flea Watt" amps.  I have reviewed both types of speakers and they were good, but not keepers for me because of the above stated reasons.

The NSMT Model 50 is a small very attractive floor-stander which has an sensitivity rating of 101 dB and never dips below 8 ohms.  It is a three driver MTM two way design that loads into a double transmission line and really reaches down to 35Hz to 20 kHz in my room.  This is the third speaker I have reviewed from NSMT, the other two were wonderful music makers, and shows what a talented designer that Erol Ricketts is in all his designs at applying his unique version of transmission line loading. 

Now, the Model 50 sounds terrific with high power SS or tube based amplification.  But what has been enchanting for me is when I drive it with either a SET 2A3 amplifier, around 3.5 watts, or my Linear Tube Audio MicroZOTL as an integrated using the NOS 1940's Tung-Sol 6SN7 black glass oval plate tubes which produce only around 1 Watt.  With either amplifier this speaker completely disappears, the beautiful colors/timbres just float out and 3D chunky images of the players fill the soundstage.  However, because of the very high sensitivity of the Model 50 and its transmission line loading the foundation of the music, true deep bass, and overall dynamics/dB levels are hard to believe.

So, if you have or always wanted to try out a SET amplifier this speaker is a great choice.  The Model 50 retails for $1,800.00 a pair, so they are very affordable to team-up with your SET amplifier.  If you want a lot more details just go to NSMT-loudspeakers website.    
teajay
t_ramey
366 posts
 
@aricaudio    

Thanks for the reply! That’s great info to be mindful of as I just took delivery of some nice klipsch speakers and would love to add more tubes to the mix at some point. 
tdwolf1414
3 posts
 
Hi @teejay did you happen to test these with the pass labs XA25 amp? Just wondering your thoughts.


teajay OP
1,333 posts
 
Hello tdwolf1414,

Yes, I have tried three different SS amplifiers, including the XA25, and the Model 50 delivers superb results with these much higher powered amps.  With each, the speaker's very high level of transparency allows the different amplifier's slightly different sonic signature to be easily heard.

So, I want to be very clear, this speaker offers wonderful results regardless what I drive it with.  My excitement over the Model 50 is that it is full range transducer that allows me to use my SET 2A3 based amplifier to hear the SET glory with no short comings at all regrading dB levels, bass extension, or a rolled off high-end.  As I stated before, I have auditioned/reviewed single driver designs and horn speakers, all of them were much more expensive, and none of them were keepers for me.   
charles1dad's avatar
charles1dad
6,996 posts
 
Hi Bill.,
 Ok I understand your objective,  exploring the specific category of  the 45 and 2A3 tubes. In that case the NSMT speaker seems an excellent place to start the process.
Charles 
aricaudio's avatar
aricaudio
110 posts
 
@t_ramey - You’re very welcome and that’s most excellent! I think Klipsch speakers of the large/high efficiency variety are great candidates for SET amps!

@teajay - It sounds like these speakers are a winner, and nonetheless a very affordable conduit to allow the speaker/amplifier magic to really shine.

Best wishes and Happy Holidays to all! Aric
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