Your problem more than likely is the BW impedanceis 150 ohms:
Black Widow headphones were designed to accommodate the professional detectorist with special hearing requirements and for environments with high ambient noise levels. ......... The Black Widow contains a dual mini-toggle switching system like our famous Gray Ghost Ultimate. One switch provides greater compatibility with detector audio systems and the other switch allows signal limitation when extreme volume is not required. ,,,,,,
Speakers designed for maximum volume, sensitivity, efficiency, durability, and signal quality.
Special ultra sound-blocking extended muff design eliminating environmental ambient noise up to 29 decibels.
Impedance: 150 ohms nominal.[/color]
The ATPro headphones are 8 ohm.
AT Pro, AT Gold, Sea Hunter, Infinium (2202400)
• Built, field tested and approved for land use with AT Pro, AT Gold, Sea Hunter and Infinium detectors.
• Efficient, wide dynamic audio range speakers enhance weak signals - FIND MORE TREASURE!
• Dual volume controls for adjusting signal levels to suit individual hearing requirements.
• Comfortable leather headband and ear cushions for maximum comfort.
• Reinforced 10-foot coiled cord
• Speaker impedance: 8 ohms per channel. Mono/Stereo.
• Frequency response: 30-18,000 Hz.
One note about the waterproof connector on the headphones: If they are assembled as Garrett does they will be almost impossible to disassemble, repair and reassemble. I have NASA Micro-Miniature electronics training and I had a difficult time on the first one I repaired. The second one was sent back to Garrett for repair. And to my surprise they did not repair the headphones, they replaced them.
You might contact gary@detectorpro.com and verify the BW's compatibility with the ATPro (ATseries and Infinium detectors).
