A class of its own
Conventional solid-state power amplifi ers tend to operate in a critical range of the built-in components this results in unpleasant harmonical artifacts. Tube power amplifi ers also distort at their limit but their characteristical behaviour soft ens this roughness and harshness. Non the less this is a falsifi ed 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
The Performer s900 features individual amplifi cation stages for voltage and power amplifi cation, which ensures a perfect operating of the class-AB amplifi er circuit. Thanks to each stages own negative feedback path, it is ruled out that feedbacks from the loudspeaker are interacting with the input
stage this way the SPL VOLTAiR Technology can play out its full performance.

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, fi t 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 preamplifi er, this trim switch is the more audiophile solution. The optimal operating range of the loudspeakers and preamplifi er 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.

AMP CTL
The standby mode of the power amplifi er can be switched on and off using
the AMP CTL connection between a preamplifi er such as the Director Mk2,
Elector, Phonitor x or Crossover. To do this, connect the 3.5 mm phone jacks with a cable with 3.5 mm mono or stereo jack plugs. Thanks to its 12 V trigger input, third party preamps can also switch the Performer s900s.

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 s900 against the unlikely event of overheating, a temperature sensor at the heatsinks continously 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 and the fans run on high-speed until the device has cooled down.

Specifications

Analog inputs: XLR & RCA

• Input sensitivity: 8 dBu
• Input impedance: 20 k
• Common Mode Rejection: -82 dB

Speaker output: Binding posts with 4mm cable hole (screwable) and banana plug

• Output power (RMS, 2 ): 2 x 450 W
• Harmonic distortion (1 kHz, 2 ): 0.07 %
• Output power (1 kHz, 4 ): 2 x 370 W
• Harmonic distortion (1 kHz, 4 ): 0.06 %
• Output power (1 kHz, 8 ): 2 x 200 W
• Harmonic distortion (1 kHz, 8 ): 0.04 %
• Output voltage (Peak-to-Peak): 112 V
• Output voltage (RMS): 40.2 V
• Output impedance (20 Hz – 20 Khz): < 0.035
• Frequency range (-3 dB): 10 Hz 80 kHz
• Amplification Gain: 26 dB
• Damping factor (1 kHz, 8 ): > 280
• Noise (A-weighted): -123 dB

Internal Linear Power Supply with Shielded Toroidal Transformer

• Linear Power Supply with Toroidal Transformer: 866 VA
• Operating voltage for analog audio: +/- 60 V
• Operating voltage (peak to peak): +/- 63 V
• Operating voltage for Relais and LEDs, AMP CTL: 12 V

Mains Power Supply

• Mains voltage (selectable, see fuse chamber): 230 V AC / 50 Hz
• Fuse for 230 V: T 4 A
• Mains voltage (selectable, see fuse chamber): 115 V AC / 60 Hz
• Fuse for 115 V: T 8 A
• Power consumption: 900 VA
• Stand-By Power Consumption: 20 VA

Dimensions & Weight

• W x H x D (width x height x depth) 278 x 108 x 345 mm /11 x 4.3 x 13.6 inch
• Unit weight 14.6 kg /32.2 lbs
• Shipping weight (incl. packaging) 15.8 kg /34.4 lbs