Acoustic Saddle Pickup System, for 1/8 inch saddle, with APA-2 preamp & Ultrajak. The EMG-AS125U is among the most natural-sounding saddle transducer systems in the world and EMG was the first to produce a piezo film pickup, receiving two patents for its designs. This is a complete system that includes the AT125 saddle pickup, APA-2 preamp, and the EMG Endpin Jack. Highs have a natural brilliance and the low-end is full and rich. Included with this system is EMG's EMG-APA-2 preamp. This is a miniature preamp/battery holder unit that is easily mounted to the neck block using a 3M dual-lok fastener. It incorporates an FET input for low noise and a very high-input impedance (20 megohms) so you can finally get every ounce of tone your guitar is capable of producing. The low-output impedance (2k Ohms) allows you to plug into a guitar amp, mixing board, or even directly into a tape/digital recorder with the same fabulous results. The most amazing aspect of this technology is that the pickup is virtually invisible. The natural tone of the guitar is amplified without added overtones or coloration. What you play is what you hear: highs with a natural brilliance and a low end that's full and rich. The total result is a pickup system for acoustic guitar that sounds as alive through a combo amp or mixing board as it does acoustically.