d&b audiotechnik A1 Mainframe Amplifier
This item is used but fully functional.
The A1 mainframe is housed in a 3 rack unit high, 19" rack mount enclosure. The A1 incorporates two power amplifiers (1200 W and 400 W), soft start power supplies, monitoring and protection circuits with the associated display elements and all connectors. All functions can be remotely interrogated and altered via the d&b Remote Interface Bridge (RIB). The mainframe accepts a single exchangeable controller module which determines both the type and number of loudspeakers which can be driven. d&b SenseDrive electronics maintain maximum damping factor with complex loads and improves low-frequency transient performance when using long speaker cables. The amplifier is comprehensively protected against overheating, connection to inappropriate or faulty loads, has a high peak output current capability and a low feedback internal gain structure. Speaker ID protects wrongly connected speakers from possible damage. The A1 is also available as a dual voltage (115 V / 230 V) autosensing version.