Thoughts on wireless subwoofer.
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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! |
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! |
Hi Uberwaltz, I’ve just noticed this thread. Thank you kindly for the mentions. I’m uncertain as to whether or not the wireless connection to the sub you’ve ordered will work ok or not. I see that the wireless transmitter is powered by an AC adapter, which I assume is a wallwart type of device. So depending on its design, and perhaps on whether it has a three-prong AC plug or a two-prong plug, there may or may not be a ground loop issue or some other ground-related issue arising between it and the Ayre. If there is, and as a result the transmitter sees a hum component on its RCA inputs, presumably it would faithfully transmit the hum to the wireless receiver. Should that occur, though, I’m thinking that a line-level audio isolation transformer connected between the Ayre and the wireless transmitter, or perhaps even between the Ayre and the RCA inputs on the sub itself, could very well be a solution. At a low price point ($60) this may be a solution: https://www.bhphotovideo.com/c/product/381596-REG/ART_DTI_DTI_Transformer_Isolator.html Its datasheet: http://www.artproaudio.com/framework/uploads/2018/06/ss_dti.pdf A Jensen transformer may also be a solution, albeit at a higher price point (~ $250): https://www.cs1.net/products/jensen_transformers.htm Hopefully neither of those things will prove to be necessary, though. Looking forward to your findings. Best regards, -- Al |
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. |
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. |
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. |
