The 325 Series features the strength and clarity of Queensland Walnut back and sides. It's solid construction and superb performance, combined with the AP5 pickup system, make it the natural choice for the working musician. . AP5 Pickup System The Maton AP5 is regarded as the very best acoustic guitar pickup system available today. The AP5 incorporates a sculpted frequency curve, designed to perfectly complement your guitar's acoustic tone. It features a sweepable mid range between 1 and 2kHz, "Soft Start" circuitry, low battery indicator and externally mounted "AA" batteries. All Maton acoustic guitars are strung with Elixir Ultra-Thin NANOWEB™ coated light gauge strings ( 0.012 - 0.053 ) The use of Elixir Strings ensures that each Maton Guitar will perform to its maximum potential. Maton Acoustic Guitars are fitted with Grover Machine Heads. .