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  • SPL Phonitor One - Preowned - very good condition

SPL Phonitor One

Audiophile and pro headphone amplifier

  • Up to 0.4W into 47Ω
  • Innovative Phonitor Matrix
  • 2x Burr-Brown OPA2134 opamps for the preamp stage
  • Push pull class AB design
Regular price $316.00
Sale price $316.00 Regular price $422.00
Unit price
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International Customers will incur local taxes and duty charges. Read More.
  • Estimated Delivery:Nov 20 - Nov 24

SPL Phonitor One

SPL Phonitor One

The preamplifier stage

2x Burr-Brown OPA 2134 SoundPlus™ operational amplifiers provide the pre-amplification. These are specially designed for audiophile circuits and are characterised 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 high-speed operational amplifier. This has an immediate positive effect on the liveliness of the playback.
In addition, low capacitance film capacitors are installed in the signal path as bypass capacitors of the coupling capacitors, which ensures a more precise transmission 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.

 

The output stage

The output stage of the headphone amplifier is designed as a push-pull amplifier in class AB mode. The bipolar transistors share the amplification of the positive and negative half-waves, which produces a higher gain and a higher output voltage than in Class A operation, where only one transistor amplifies both half-waves. The output stage transistors are thermally coupled and thus run particularly coherently, which contributes to a consistent and stable sound image. The power supply has a buffer circuit with low source resistance, ensuring generous current reserves even when operating low-impedance headphones.

Technical Specifications

Dimensions
210 x 49.6 x 220 mm
Frequency range (-3 dB)
10 Hz - 200 kHz
Design type
Push pull class AB
Output Power
190mW@600Ω, 330mW@250Ω, 0.4W@47Ω
Crosstalk (1 kHz, 600 Ω)
-75 dB
THD + N (0 dBu, 10 Hz – 22 kHz, 600 Ω)
0.002 %
Noise (A-weighted, 600 Ω)
-99 dBu
Maximum input gain
22.5dBu
Common mode rejection
< 60 dB
Source Impedance
20Ω

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