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Thoughts on wireless subwoofer.

Just looking for thoughts on whether this idea might actually work!

I have an Ayre ax7e integrated amp which does not have a sub out so best connection to a sub would be from speaker terminals taking care on connections as this is a fully balanced design.
This has been discussed previously in other threads and with Almarg.
However in my system hooking up a sub like this AND alternatively using the tape out RCA resulted in a very audible ground hum especially on phono.
This I could not get rid of so abandoned the idea.

Now here are my thoughts anew.

What if there was no actual physical connection between amp and sub? Surely then I should not suffer a ground loop hum?
Started looking at wireless subs and there are a few hifi orientated brands than run of the mill HT units.
One in particular I have been studying is the Martin Logan Dynamo 700w. This has a built in receiver and uses a transmitter that accepts RCA inputs and transmits on Bluetooth to the sub.

Sounds like it should work but.....

Anybody see any downside or has actually used a wireless sub?

Thank you.
128x128uberwaltz
uberwaltz's avatar
uberwaltz OP
13,381 posts
 
Well as no takers I guess I will just buy one and find out ... Lol
rhljazz
1,255 posts
 
Have you considered just running a set of cables from your speakers to the sub/subs?  Your speaker terminals allow for both spades and bananas so connection will be really simple.  Of course the sub/subs must allow for speaker level input.
uberwaltz's avatar
uberwaltz OP
13,381 posts
 
Yes
As I said any physical connections either from speaker terminals or RCA gave an unacceptable ground loop hum.
However speaker level connection to subs from an Ayre a7xe is anything but simple I am afraid.
But thank you!
gdnrbob
4,449 posts
 
I can commiserate about trying to hook up a pair of speakers and subs on the A7xe. Those binding posts make adding 2 pairs of cables a bit of work, but, it can be done.
B 
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rauliruegas
13,095 posts
 
Dear @uberwaltz: I have not experience with wireless subs. Now and due that your speker woofers crossover 300hz you need to use an external good quality crossover ( Bryston is an example or Pass. ) to relief the main speakers woofers from 80hz and down.
Using the speakers full range along the subs is a big mistake and not the way to go because the main target when using subs in a stereo music home audio system is to improve the IMD lowering it at much we can and when you make what I said you are achieving that critical target and then your system sound will improves in a huge way putting you nearer to the live event. You need two powered subs connected in true stereo fashion.

If the powered subwoofers comes with a good quality high pass filter then you don't need an external crossover that normally has better quality performance.

Either way you need to contact Mr. Jansen ( I think is the Ayre owner, maybe I'm wrong. ) and explain him the trouble you are experienced and see which are his advise. Maybe a new integrated amp because yours has at least 10 years was designed.

In the other side maybe the trouble could comes from a not very good subs design you have, I can't know for sure.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
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