Headphone amplifier SPL Auditor High-End class.
When developing the Auditor, SPL strictly adhered to a purist concept to achieve the highest signal quality. The basis of the circuit design is the time-justified reference technology “120Volt”, which uses hand-assembled operational amplifiers operating at 120 volts. This is approximately twice as much as in all modern semiconductor circuits. Thanks to this circuit design, it was possible to achieve a level of efficiency that goes far beyond the capabilities of traditional designs. The net result: uncompromising superiority in dynamic range and distortion levels over all known analog and digital standards. In other words, nothing but sound.
FP29 headphone amplifier perfect Reference German SPL2910/2911, using almost the same Circuits,layout and materials.
The op-amp in the machine is not for signal amplification, just provided for stabilize operating point and protect the headphones, without any replacement necessary
Amplifier using four groups of amplifier module, two for each channel, all discrete components production
Size: 190(W) * 80(H) * 310(D) mm, weight: 3.5 kg
NORATEL seal toroidal transformer, HA main filter capacitor, Panasonic FC series capacitors,
ERO film capacitors, ALPS27 potentiometer, Fairchild/ST transistor
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