SPL Phonitor One Headphone Amplifier
The audiophile headphone amplifier
with innovative Phonitor Matrix and excellent sound quality.
With us, the sound is always in the foreground. If it sounds good, we’d love to listen. To get such a sound, you need experience and technical finesse. SPL has entered both into Series One
The power amplifier
The output stage of the headphone amplifier is designed as a push-pull amplifier in Class AB mode. The bipolar transistors share the gain of the positive and negative half-waves, yielding higher gain and output voltage than in Class A operation, where only one transistor amplifies both half-waves.
The output stage transistors are thermally coupled and therefore run particularly coherently, contributing to a consistent and stable sound image.
The power supply has a buffer circuit with low source resistance, which ensures generous power reserves, even when using low-impedance headphones.
Two Burr-Brown OPA 2134 SoundPlus™ operational amplifiers provide the preamp. These are specially designed for audiophile circuits and are characterized by extremely low noise and minimal distortion of only 0.00008%.
Thanks to a true FET stage, the OPA 2134 achieves a slew rate of 20V/µs, making it a fast operational amplifier. This has a direct positive effect on the vibrancy of the playback.
In addition, low-capacity film capacitors are installed in the signal path as bypass capacitors of the coupling capacitors, ensuring more accurate transfer of the high-frequency signal components.
The excellent Panasonic ‘Electric Double Layer’ gold electrolytic capacitors are used as coupling capacitors. They offer the highest storage capacity of all capacitor technologies.
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