Thoughts on wireless subwoofer.

Well as no takers I guess I will just buy one and find out ... Lol

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!

Raul
Thank you
Unfortunately I have already ordered a Martin Logan Dynamo 700w sub.

But I do see your point exactly on cutting the lower freq to my main speakers as you would in a ht rig with small sat speakers say.
I can see how the combined low freq from both the mains and the sub may make it harder to integrate the sub seamlessly.

I did speak to Ayre before pursuing this and part of the problem is the way the ax7e is built as a fully balanced unit and it just doen not play nice with some subs depending on THEIR grounding design.

There has been a couple of important threads on this previously which Almarg was kind enough to make me aware of. If he had not and I had just connected a sub up using the speaker terminals as common practice would have you do so I could have actually seriously damaged the Ayre internally.

See this...
https://forum.audiogon.com/discussions/subwoofer-for-ayre-ax-7e

So I will try the wireless approach although it does mean I have full output at the tape loop output but I could likely find a unit to insert inbetween that that would turn it to a variable output. Only just thought of that and I am sure something must already exist for that function, to take a fixed rca output and give you the option to vary it. Google search time!

But thank you Raul.

interesting

few options for altering the fixed output from the ayre to sub

http://www.volutone.com/CALRAD-10-105-STEREO-INLINE-LINE-LEVEL-AUDIO-ATTENUATOR-P8778.aspx

https://www.parts-express.com/cat/line-level-attenuators/1916

Or maybe even a passive preamp?

https://www.amazon.com/d/Audio-Component-Preamplifiers/Nobsound-Fully-balanced-Single-ended-Pre-ampl...

Have a few options for sure but first need get the sub here and test it to even see if my first theory holds any water.

Thanks Al!

Should be here next week and then we will see what occurs.

I am sincerely hoping it is not that efficient that it faithfully passes on the ground loop hum...lol.

The ac transmitter will be plugged into the back of my Equicore 1800 whether that will help or not remains to be seen!

Will update later!

Well for once my thoughts and a plan actually panned out perfectly in real life practice!

Sub online via a Bluetooth transmitter and absolutely no ground loop hum at all on any input.

And with it being a 10 inch sub it is fairly tight and musical and able to use as a variable input and tailor its frequency response so it is dialed in and for once I would say it is near impossible for me to detect actual sounds coming from the sub itself.

But it has done its job exactly as I wanted and nicely just filled in the very low end that my 2 way Devores could not.

Even a blind squirrel finds a nut once in a while!

Thx Al.

It used to be a favorite saying of a work colleague whilst troubleshooting electrical maintenance issues in factories.

A very skilled technician but always modest, a rare commodity nowadays.