The S-75 from Thomann's in-house brand the t.amp - now in its second generation - is a budget-friendly power amplifier for use in fixed installations and features two inputs and two outputs, the latter of which can accommodate two fixed-installation speakers like the Reflect 5 Black from Thomann's Sirus brand (sold separately). The minimalistic user interface comprises just two controls for adjusting the volume of each channel, which makes the S-75 MK II very easy to operate, while the rear panel features three switches for making fine adjustments, including ground lift and operating mode. The S-75 MK II tips the scales at 7.5kg and requires a single unit when installed in a 19" rack, which makes it an ideal solution for small fixed installations designed to provide sound in more intimate spaces.
The t.amp S-75 MK II features a fanless design, and alongside the aforementioned gain controls, the front panel houses a six-segment level indicator for each channel. The two outputs on the rear of the unit feature both speaker-twist sockets and cable terminals, and a power output of 2 x 75W at 4 ohms or 2 x 45W at 8 ohms is available. The inputs in turn offer a choice of balanced XLR sockets and 6.35mm jack sockets for line-level signals, and the input gain can be adjusted between -0dB and +4dB. All of the protective circuits feature a soft start function, while ground loops can be eliminated using the ground/lift switch, and the user can additionally choose between stereo (STE), parallel (PAR), and bridged (BR) modes via the dedicated switch.
The t.amp S-75 MK II is designed for compact fixed installations used for amplifying music and speech in locations like restaurants, cafés, hotels, and schools. As mentioned above, the user interface comprises just two controls and is thus simple and intuitive enough for anyone to use, and the LED level controls for both channels provide a clear overview at all times. The S-75 MK II can easily be shut down via the power switch located on the front panel, and its compact 1U rack height means there will still be plenty of space for a CD player or a small rackmount mixer, so a microphone can be connected for transmitting speech to a second room, for example.
the t.amp is one of the many in-house brands belonging to Musikhaus Thomann, and since 1998 has offered power amplifiers, complete passive PA sets, keyboard amplifiers, and connection systems. The brand’s entire product range delivers an impressive combination of quality and reliability at attractive prices, and users can find a convincing and affordable solution for every application: From youth clubs and sports halls through to congress centres and much more.
The ERP switch on the rear of the t.amp S-75 MK II activates an automatic standby function which, when engaged, places the amplifier in standby mode after 20 minutes without an input signal. Since power consumption is particularly high when the power amplifier is switched on, care should be taken to avoid too many devices being powered up at once, as this can overload the power supply circuit and cause the circuit breaker to interrupt the power supply. The front panel of the S-75 MK II additionally features an LED indicator for the protective circuit, which illuminates if the speakers are still electrically disconnected from the power amplifier after switch-on, the temperature of the power amplifier transistors exceeds 85°C, or a malfunction exists in the device, making troubleshooting much easier.