Atoll PR400 Signature
The Atoll PR400 Signature pre-amplifier is a high-end pre-amp hand made by experts in Normandy, Northern France – it offers superlative audiophile performance at a very realistic price considering its quality and pedigree. The PR400 Signature is a world-class amplifier and will better many ultra-high-end amps regardless of cost.
The PR400 Signature operates in dual mono with one low-noise transformer per channel. The potentiometers and selection relays are also separate for the two channels. The link capacitors (top-of-the-range MKP) are shielded in independent formwork to avoid any parasitic noise. The volume is managed by two motorised, independent, and perfectly synchronized ALPS potentiometers. We use a proprietary servo system, based on a real-time measurement not intrusive to the audio.
- 10 mm brushed aluminium front panel.
- Linear power supplies based on low-noise toroidal transformers.
- Symmetrical stages with discrete components.
- Optional DAC board
- Low-consumption OLED display.
ATOLL global remote control.
5 Stereo line inputs: AUX, CD, Tuner, DVD, TAPE.
2 Stereo XLR inputs.
1 BY-PASS input.
1 Stereo tape output.
2 Stereo preamp outputs.
2 Stereo XLR outputs.
1 Trigger output 12V.
1 Headphone jack Ø 6,35 mm.
The discrete component audio stages have a purely symmetrical structure, the scheme is based on a dual input differential pair and an original scheme biased in class A with very low feedback. This structure allows for the minimisation of both the overall and the intermodulation distortion, which favours the spatial and material perception of the instruments. The PR400 Signature has a low-consumption OLED model display that was chosen for its excellent contrast and low electromagnetic interference. Moreover, its power supply and the ones of all the control devices are completely independent of the audio power supplies.
Analog power supplies: 2×10 VA
Digital power supplies: 10 VA
Total of capacitors: 112 000 µF
Number of inputs: 5 lines, 2 XLR
Bandwidth: 0,5 Hz – 780 kHz
Rising time: 0,4 µs
Input Impedance: 357 kΩ
Sensibility: 4 V
Signal/Noise ratio: 100 dB
Distortion at 1 kHz: 0,004%
Dimensions: 440×370×130 mm
Weight: 15 Kg