The 2RU T-90 Switchmode Power Amplifier from Turbosound is designed for use with Turbosound loudspeakers in both concert touring and fixed installation applications. The 9000W switch-mode power supply is capable of delivering large transients without perceptible low frequency "sag". The amplifier utilizes a Class-AB output stage with fixed rail architecture, designed to enable a stable DC supply and optimum headroom.
The T-90 features a power control system linked to the limiters and to the power supply, with continual monitoring of operating parameters such as load and temperature. The power reduction control (PRC) reduces the available power output from the amplifier by enabling you to set a maximum output power level below its rated output. In addition to the AC power switch and power LED, the front panel carries an intuitive set of status indicators. These include a signal present indicator, -3 dB level indicators, limiter and PRC indicators, audio protection and bridged mode status. Channel gain is adjusted with analog controls, allowing precise signal level settings.
The T-90 amplifier is equipped with protection features. A soft start sequence with full in-rush protection powers the amplifier up in mute and progressively fades up the signal to the previous setting. Diagnostic circuits constantly monitor load, temperature and other parameters, and automatically adjust the power supply if any overheating occurs. This amplifier only requires a manual restart following short circuit faults.
The T-90 is 2RU, 19" rack mount with integral carrying handles on a 5mm front panel. Low noise variable-speed fans are utilized for front to rear forced air cooling, together with a front panel mounted reticulated foam air filter which can be removed for cleaning. The rear panel carries a captive AC power cable and circuit breaker. Each channel is provided with a 3-pin female XLR input connector and 3-pin male parallel link out connector, while the loudspeaker outputs are on Neutrik speakON NL4. A rack mount kit is supplied to enable the rear of the unit to be rack-mounted for extra stability.