Turbosound T-25


2 Channel Switchmode Power Amp,1,250W,4Ohms@1kHz


The TURBOSOUND TAM T-25 is a lightweight switchmode power amplifier designed for use with Turbosound loudspeakers in both concert touring and fixed installation applications. The switchmode power supply is capable of delivering large transients without perceptable low frequency ‘sag’ because of its large power reservoir, and is the key, together with the aluminium chassis construction, to the very low net weight, making the T-25 an ideal choice for concert and regional touring. The amplifier utilises a Class-AB output stage with fixed rail architecture, which enables a stable DC supply and optimum headroom while maintaining excellent sonic quality.

The T-25 features a sophisticated power control system linked to the limiters and to the power supply, with continual monitoring of load, temperature and other operating parameters. The power reduction control (PRC) effectively reduces the available power output from the amplifier by enabling the user to set a maximum output power level below its rated output. This allows a better match with the power handling of the loudspeaker system in use, and thereby improves overall system reliability. In addition to the AC power switch and power LED, the front panel carries a simple and 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 analogue controls, allowing precise signal level settings.

The amplifier is comprehensively 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. The amplifier only requires a manual restart following short circuit faults.

The T-25 is designed around a roadworthy 2U, 19″ rack mount package with integral carrying handles on a 5 mm front panel. In addition a rack mount kit is supplied to enable the rear of the unit to be rack-mounted for extra stability. Low noise vari-speed fans are utilised for front to rear forced air cooling, together with a front panel mounted reticulated foam air filter which can be easily 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.


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