Speaker not turning off with Garrett Headphone Adapter? - Solution here

[Kayaker]

I had some problems with my wireless headphone transmitter not playing well with my Garrett AT Pro's internal speaker. The headphones work fine but the AT Pro internal speaker would not turn off. I sent an e-mail to Garrett and they confirmed that the AT Pro senses the impedance of the headphone in order to determine that it should turn off the speaker. Garrett engineering said a resistor in the range of 1,000 to 10,000 ohms across the headphone connector will solve the problem.

SO... if your headphone (or wireless transmitter, in my case) works but doesn't turn off the speaker, it is likely that the headphone's impedance is too high. I found an easy solution from another forum.

Radio Shack headphone extension with volume control - Part Number - 42-2559 ($9.99). use this between your headphone and the AT Pro Adapter jack, and it puts the required load on the adapter to turn off the speaker. For me it worked like a charm. Here is my AT Pro with the Adapter, extension cord with volume control and wireless transmitter- all tucked under the cuff.

http://inlinethumb09.webshots.com/47624/2265490060091733654S425x425Q85.jpg

 

[john in san diego]

Just today I was having the same issue. Thought I would look here for some guidance, and here you are, posting a solution. Went down to my local RS and picked one up. Works like a champ. Thanks for the post.

 

[plugger]

What kind of wireless headphones are you using? Part number?

 

[john in san diego]

I use the same setup as below and it works great

This is from a prior post by Hunt4Fun on this site.

I recently put together wireless headphones for metal detectors using these Radio Shack parts:
> AUVIO Portable Digital Wireless Stereo Headphones Part # 33-283
> Adapter Plug 1/4 Stereo Male to 1/8 Stereo Female Part # 274-876
> Volume Control Headphone Extension Cord Part # 42-2559

You can plug the transmitter directly into the Adapter Plug but it seemed too exposed to damage hanging out the back of the detector. For that reason, I bought the Extension Cord so I could secure the transmitter, with velcro, to the top of the control box. BTW, since the headphones have a volume control, the volume control in the Extension Cord is not necessary but I could not find a standard short extension cord.

Have not spent a lot of time with these wireless headphones but so far they are working great with no detectable delays. I set the inline volume control to full volume and am controlling the volume with the adjuster on the headphones. CAUTION ... at full volume on both the inline and headphone adjusters the signals are VERY loud.

This setup was tested and works well on all the Whites detectors I own. I have read that not all manufacturers wire their headphone jacks the same way. Since I am not an electronic tech, I do not know what other makes and models this setup will work on.

 

[Kayaker]

I'm using the Auvio 33-284 wireless headphones. They are the earbud version. The 33-283 setup that John in SD mentioned are the full, over-the-ear model. I think both models may have been discontinued but you can still find them in some local Radio Shacks. At full price (80 bucks) they're a bit steep for what the are, but since they're being discontinued some folk have gotten them for around $50. I bought mine broken/as-is off eBay for 5 bucks. I lucked out since mine just had a bad earbud. I cut both off and spliced the receiver onto a lightweight headset I wasn't using.

 

[john in san diego]

Kayaker, while they are regular headphones, they are light. Too bad they are being or have been discontinued. That the way it seems to go, about the time you discover something that will work for a particular problem, the item is not available. So, does that mean I am slow or technology is moving fast? I hope it's not me, I have enough other problems, LOL.

 

[Kayaker]

Ha! I know what you mean. I usually buy something just when it's at its most expensive, and then watch the price plummet afterwards. I was concerned that the bigger headphones would be too hot for me in the summer, so I figured I'd try this other kind. I think the biggest advantage of the model you bought is that I've heard the batteries last longer. I've only used mine about 4 hours, so I don't know how long they'll go. I don't think the internal batteries in mine are replaceable, either. So I hope they last few more than a few charges.