Latest design, low feed back speaker to suit Minelab GPX-4500 and GPX 5000 metal detectors, unlike any other speakers on the market. The speaker will also work with any amplifier available on the market for the Minelab metal detectors. Speakers help reproduce faint targets better than the head phones supplied with the metal detector. Our brand new speaker to suit Minelab GPX-4500/GPX 5000 Metal Detectors. This speaker has been specifically engineered to eliminate the problem of feedback when checking your targets close to the coil. Speakers that are currently available in Australia all have this annoying feedback problem. This speaker has a standard 1/4″ jack and is suited to most boosters currently available on the market. The speaker will also plug directly into your Minelab GPX series metal detector battery. All the advantages of better target response on faint targets, able to wear hat in warm weather, no more sweaty ears and perfect for people sharing a detector or instructing someone else how to use a gold metal detector.