Fully balanced amplifier from ATI made in USA in California. 300 Watts into 8 ohms, 450 Watts into 4ohm. AT3007, SEVEN Channels. Two Toroidal transformers! Heavy duty.In good working condition. One binding post is partially broken but workable with banana plugs and bare wire.ATI is the manufacturer for larger manufacturers such as Outlaw, Mark Levinson, Adcom, LexiconATIs Pure Balance® technology introduces a range of models that feature true differential design; balanced from input to output. This design allows the quietest and purest reproduction of the audio signal. Power output is 300 Watts RMS/channel into 8 ohms from 20Hz to 20kHz with no more than 0.03% THD and I.M. distortion.Remote Trigger:Activated from 3.3VDC to 24 VDC via a heavy-duty relay.Protection Circuits:Optically coupled with full automatic reset.Toroid Transformers:40% more efficient than EI type. Separate bi-filar windings for each channel guaranty lower noise and crosstalk.Circuit Boards:Double-sided, FR-4 glass-epoxy, computer-grade boards are assembled in-house.Soft Start Circuitry:Ultra soft turn on reduces in-rush current to a minimum. Multiple units can be turned on without tripping circuit breakers eliminating the need for sequencing.Power Transistors:High-current, bi-polar output transistors with active bias circuits result in effortless operation.Power Cord:Detachable, 3-wire cord, 20 amp circuit.7 Year Warranty:Parts and labor against defects in parts or workmanship.Dimensions:17w X 8.75h X 18d (chassis)Local Pick up in 92677 preferred. Able to get a box from the MFG for shipping if necessary for $120.