The  Natural 6 has been designed for guitarists and players of acoustic instruments. It''s easy to move around and gives a sound which is incredibly faithful to the original. Imagine a guitar that sounds the same whether you have your amp on or off. The Natural Series can also cope with keyboards and electronic drum kits because of its 50Hz to 20kHz bandwidth. How can the 5 and 6 manage this tour de force? It''s simple - 90 or 140 Watts of pure RMS bi-amplified sound passing through a 1 inch neodymium dome tweeter and a 5 or 6 inch fibreglass woofer. You also get a full set of connections (balanced inputs/outputs, 3-band EQ, phantom power supply, reverb, DSP [8 presets on the Natural 6], anti-feedback and ground lift) for your guitar, acoustic instruments, dynamic mics, condenser mics (48V) and stereo in/out devices. Its robust design, rectangular shape, heavy duty handle and pole socket for stand mounting make it an extremely versatile, professional tool. Features 140 Watts RMS bi-amplified Mixing table 4 inputs/ 4 outputs Anti-feeback and ground-lift Phantom power +48V 8 positions DSP reverb Perfect for acoustic guitars, stringed instruments and mics. Specifications Speaker : Dimensions (W x H x D) in mm: 285 x 390 x 320 Weight (per unit:) 13,5Kg Weight with masterbox: 14,5Kg Fuse rating: 100V - 120V (3.15A) 220V - 240V (1A) Shape: Rectangular with pole socket for stand mounting Amplification : Woofer: 6½ (165mm) - Fibreglass membrane Tweeter: 1 (25mm) - Neodymium Dome Frequency range: 50Hz -20KHz HF Power RMS (peak): 40W (60W) LF Power RMS (peak): 100W (180W) Signal to Noise ratio: 92dB SPL level (max): 114dB Cut-off Frequency: 2.6KHz Subsonic Filter: 45Hz Mixing console: Inputs: 2 XLR/Jack 1 Jack 1 stereo RCA Outputs: 1XLR 1 Jack 1 stereo headphone set 1 RCA stereo Input/output impedance: 1.5M? (XLR balanced) 1M? (Jack unbalanced) 22? (RCA) EQ boost/cut range: +/- 15dB High frequency: 12KHz Mid frequency: 2.5KHz Low frequency: 80Hz DSP effects: Reverb 8 positions Anti feedback: Yes Ground lift: Yes