Fishman Loudbox Pro LBX-001 Acoustic Guitar Combo Amp This full-range, high powered amp is designed especially for acoustic stringed instruments. With performance that gives new meaning to the phrase 'loud and clear', this diminutive, triamped powerhouse delivers studio-quality sound at stunning volume levels. The 250 Watt, single-channel Loudbox, features an 8 in. woofer, 4 in. polypropylene mid driver and two 1 in. soft-dome neodymium tweeters. amplificador de guitarra acustica