SPL / 1901

The SPL/Phonitor One is a headphone amplifier that uses two Burr-Brown OPA 2134 op amps in its preamp FET stage.

＜Features＞
■Stereo input: Analog (1/4"" TRS phone, RCA)
■Two Burr-Brown OPA 2134 op-amps used in preamp FET stage
■Low capacitance film capacitors for accurate transmission of HF signals
■Equipped with Phonitor Matrix Crossfeed function
■Class-AB output for a wide range of headphones
■Maximum output (600Ω): 2 x 190mW
■Maximum output (250Ω): 2 x 330mW
■Maximum output (47Ω): 2 x 400mW
■12V power supply
■Secondary internal power supply for maximum +22.5dB input gain

＜Specifications＞
■Analog inputs; 6.35 mm (1/4"") TRS Jack (balanced), RCA
・Input gain (max.): +22.5 dBu
・Input impedance Line In 2 (balanced): 20 kΩ
・Common mode rejection: < 60dB
・Input impedance Line In 1 (unbalanced): 47 kΩ

■Headphones Output; 6.35 mm (1/4"") TRS Jack>
・Wiring: Tip = Left, Ring = Right, Sleeve = GND
・Source impedance: 20Ω
・Frequency range (-3 dB): 10 Hz - 200 kHz
・Noise (A-weighted, 600 Ω): -97 dBu
・THD + N (0 dBu, 10 Hz - 22 kHz, 600 Ω): 0,002 %
・THD + N (0 dBu, 10 Hz - 22 kHz, 32 Ω): 0,013 %
・Max output power (600Ω): 2 x 190mW
・Max output power (250 Ω): 2 x 330 mW
・Max output power (47 Ω): 2 x 400 mW
・Fade-out attenuation (600 Ω): -99 dB
・Crosstalk (1 kHz, 600 Ω): -75 Db

■Internal Power Supply
・Operating voltage for analog audio: +/- 17V
・Operating voltage for headphone amplifier: +/- 19V
・Operating voltage for relays: +12 V

■External Power Supply
・AC/DC switching adapter: Mean Well GE18/12-SC
・DC plug: (+) pin 2.1mm; (-) outside ring 5.5mm
・Input: 100 - 240 V AC; 50 - 60 Hz; 0.7 A
・Output: 12V DC; 1.5A

■Dimensions & Weight
・W x H x D (width x height incl. feet x depth): 210 x 49,6 x 220 mm
・Unit weight: 1,40 kg
・Shipping weight (incl. packaging): 2 kg