PA-One
The PA-One is a valve-based headphone amplifier and preamplifier with a built-in USB DAC. It suits listeners who want to use high-end headphones with a computer or add a preamp to a larger hi-fi system.
- Valve headphone amp and preamp with USB DAC
- Valves: 2 x 6SL7, 2 x 6SN7, 1 x EZ81
- Inputs: XLR, RCA, coaxial, optical, USB
- High and low impedance headphone modes
- Two 6.3mm headphone sockets plus RCA preamp out
- Digital resolution up to 192kHz
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The PA-One combines a valve amplification stage with analogue and digital inputs. Its valve complement is two 6SL7, two 6SN7 and one EZ81. Low and high impedance modes allow it to drive a wide range of headphones, and there are two 6.3mm headphone sockets on the output side.
Inputs cover two balanced XLR, RCA phono, coaxial, optical and USB. The USB input works with Windows and Mac computers, is USB 1.1 and 2.0 compliant, and handles sample rates up to 192kHz. A set of RCA outputs lets the unit act as a preamplifier feeding a power amplifier or other system components.
The front panel has a large volume knob and a balance control, along with input selection and impedance mode controls. The valves and electronics sit in a Lancaster Grey steel chassis sized to work as a stand-alone desktop unit or as part of a larger system.
Video
Specifikationer
- Mærke
- Quad
- Model
- PA-One
- Kategori
- Hovedtelefoner
Inputs
- Inputs
- 2 x Balanced XLR, RCA Phono, Coaxial, Optical & USB
- Input Impedance
- 50k Ω
- Input Sensitivity
- 300mV (500mW at 32 Ω)
Outputs
- Outputs
- 2 x 6.3mm Jack headphone socket, RCA Phono
- Output Power
- 500mW at 32 Ω
- Output Impedance
- 32 Ω - 300 Ω
- Impedance Modes
- High / Low
Audio
- Frequency Response
- 15Hz - 30Hz (+0.5dB, 0.5dB)
- Distortion
- 0.5% at 1kHz
- Channel Balance
- +0.5% at 1 kHz
- S/N Ratio (ref. 500mW)
- 105dB (IHF-A)
- Digital Resolution
- 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176kHz, 192kHz
- Valves
- 2 x 6SL7, 2 x 6SN7, 1 x EZ81
Connectivity
- USB DAC
- USB 1.1 and 2.0 compliant, Windows or Mac
- USB sampling frequencies
- 35kHz to 192kHz
Physical
- Size (W x D x H)
- 180mm x 284.5mm x 163.5mm
- Dimensions (H x W x D)
- 90 x 220 x 300mm
- Net Weight
- 7.5kg
- Chassis
- Lancaster Grey steel