SPL S900 Performer Stereo Power Amplifier

Right in the centre – with big sound!

Conventional solid-state power amplifiers tend to operate in a critical range of the built-in components – this results in unpleasant harmonical artefacts. Tube power amplifiers also distort at their limit but their characteristical behaviour softens this roughness and harshness. Non the less this is a falsified representation of the sound image. 

Thanks to VOLTAiR Technology, the Performer s900 can process much higher levels without even coming near to a critical range. All components constantly operate in the optimal range. The result is a very pleasant, natural and relaxed sound experience. Enjoy your music in every detail and without any listening fatigue.

Full power

Freedom of choice

The Performer s900 features a stereo pair of XLR and RCA inputs. This makes it compatible with all preamps on the market without the use of adapters.
The stereo input can be selected via the Input Select switch on the rear panel.

Trim to fit

With reference to the Performer s900, “fit” means adapted. You can adapt the input sensitivity in 0.5 dB steps from 0 dB to -5.5 dB. In contrast to a panorama potentiometer in a preamplifier, this trim switch is the more audiophile solution. The optimal operating range of the loudspeakers and preamplifier can be perfectly adjusted this way.

Power to the speakers

The loudspeaker binding posts can accommodate banana plugs as well as a stranded wire with a diameter of up to 4 mm. Thus, any common type of speaker cable can be used. However, we do not recommend connecting a speaker with less than 2 ohms impedance

Sounds good

With all devices of the Professional Fidelity series we develop not only according to plan, but also by ear. Many important components are installed on the circuit boards using Through-hole technology. This way we can ensure that we can use the best sounding components.

Better safe than sorry

The Performer s900 has a protection circuit against DC voltage and against overheating. If direct current (DC) is detected, the output stage switches off automatically and the Protect LED lights up red. To protect the Performer s900 against the unlikely event of overheating, a temperature sensor at the heatsinks continuously monitors the temperature of the device. The TEMP LED lights up yellow when the Performer s900 is getting too hot. As a result of this the output stage is switched off until the device has cooled down.

The VOLTAiR Technology

The 120V technology is our reference technology. The 120V technology is unique in the world. It operates at a DC voltage of 120 volts. This is four times that of IC-based semiconductor op-amps. In our Professional Fidelity series, we refer to this unsurpassed technology as VOLTAiR technology.

The highest possible audio quality requires the highest possible audio operating voltage.

By the way, the “120V” in the name of the technology has nothing to do with the local mains voltage from the mains power socket. This is about the operating voltage inside the device with which the audio signals are processed.

The mains voltage from the mains power socket is transformed to the required secondary voltage in the device’s internal linear power supply with toroidal transformer. Rectifiers convert this AC voltage into DC voltage required in the audio device.