The EMG-APA-2 Acoustic Preamp has been designed with the needs of acoustic players in mind and is the perfect complement the AT93 and AT125 pickups. It combines a miniature, low-current draw preamp and a 9 volt battery holder in a single package that attaches to your guitar's front block (at the internal joint between body and neck) with two screws.
The natural output impedance of a film or crystal pickup element is much higher than that of a traditional magnetic pickup. If you plug the output of a piezo directly into a conventional amp input, the impedance mismatch causes a loss of signal output along with a huge loss of bass - you get a brittle and unpleasant sound (sound familiar?). The APA-2 features a very high input impedance (2 Megohm) to allow the piezo pickup to deliver powerful, natural sound across the entire frequency range.
In addition to the piezo input, the APA-2 also includes an input for our ACS magnetic soundhole pickup which gives you the best of both pickup worlds. Since you might require different EQ settings for each pickup, we include our exclusive stereo UltraJak end pin jack which delivers each pickup's output separately. The UltraJak also includes a switch that disconnects the battery when unplugged to extend battery life. You can assign the pickups to the ring and tip contacts for complete customizability.
Our low-current circuitry should give you 2900 hours of battery life between changes. When you do need to change the 9V battery, our specially-designed battery clip makes it easy to change the battery through the soundhole. There's also a convenient trimpot that allows you to vary the output level to match the device that you're connecting.
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