Martin Logan 13A's with Rel subs? A match?

I have set several REL up with REL Speakon type connector.  Typically you will connect the Red lead to the Right Positive post , the Yellow to the Left Positive post .    If the Amp is a true balanced differential Do Not connect the Black lead to a speaker post, float the ground. Not all balanced amps are fully differential , ATI amps are and they make amps as an OEM for several companies it's.  If in doubt check with mfg.   You can damage an amp by connecting the Black.   If the Amp is single ended RCA and you get hum with the Black lead connected to a binding post.  Float the ground.  Ground to chassis with Black wire if in doubt, but check with Amp mfg

REL is usually a safe bet,   the key is not setting the crossover too high.  I just set up a S/510 for my Dad and it is a great sub.    The T series are good too , especially for the money.   

I have an older REL r 305 in my second system and it has been in use every day for the past 15 years. 

With your speakers I would recommend one of their carbon subs or an S/812.    Or two! 

oddiofyl , thanks for the info. my goal is to hook up a pair. i have a krell duo 300xd amp. not sure if it's a truly balanced differential though

thanks

mike

My experience with stats is that they always sound more coherent without a sub. At that price point, I would hope the 13A's aren't failing in that regard. If so, you have my sympathies for buying Martin Logan. Move on.

@mikepaul   To your question of one or two subs, I think the answer lies in the amp you are using.  If you have a single stereo amp, the REL connection will capture all the bass.  However, if you are running monoblocks, you absolutely require two subs.  I run a pair of REL S/812s and I'm very happy with them.  As noted above, the wiring of a REL sub is very dependent on whether or not the amp is truly balanced.  You'll know right away if you get it wrong as your speakers will be trying to jump out of their enclosures.  🤣   Cheers.