CH Precision - P1 Stereo Phono Vorverstärker
DIE ultimative Phono-Vorstufe an der Grenze des Machbaren!
Die P1 verfügt über insgesamt drei Eingänge, von denen zwei als "strom-verstärkende" Eingänge für höchstwertige MC-Tonabnehmer ausgelegt sind und ein dritter Eingang als "spannungs-verstärkender" Eingang für sowohl MC- als auch MM-Systeme.
Auch als Mono im Paar erhältlich sFr. 47'600.-/Paar
Technische Daten
| Height | 133 mm |
| Width | 440 mm |
| Depth | 440 mm |
| Weight | 20 kg |
Mehr Infos
CH Precision P1 - Stereo Phono Vorverstärker (2x Phono Pre Modul)
Alle fabelhaften CH Precision Musikinstrumente werden entwickelt und hergestellt in +Suisse+.
Technische Eigenschaften:
Modularity:
Two P1 configurations are available:
- Dual Monaural (two channels in a single enclosure)
- True Monaural (each channel in its own enclosure)
Moving coil current inputs:
The P1 provides two moving coil current inputs, featuring the following specifications:
- inputs specifically designed for low output, low internal resistance MC cartridges
- current mode for best signal to noise ratio when paired with low output MC cartridges
- no impedance adjustment required in current mode
- XLR and RCA connector available on each input
Moving magnet / moving coil voltage input:
The P1 provides a more classical voltage input, featuring the following specifications:
- input designed for MM, MC cartridges and step-up transformers
- ultra low noise FET-input stage
- cartridge loading adjustment, variable from 100k Ohms to 20 Ohms in over 500 steps
- wizard to select the cartridge's optimal loading through frequency response automated analysis
- XLR and RCA connections
EQ curves:
- RIAA and enhanced RIAA (with additionnal Neumann pole) EQ curves factory fitted
- high grade, tight tolerance custom components
- optional add-on board containing EMI, Columbia, Decca and Teldec EQ curves
Analog signal path:
- selectable high-pass subsonic filter to remove unwanted rumble
- ultra low noise, high bandwidth, high slew rate design
- class A, discrete transistor based design
Power supply:
- ultra low noise, high accuracy, discretely regulated linear power supplies
- oversized mains toroidal transformers
- shunt regulators for all stages
- can be powered from the X1 External Power Supply unit
MC current inputs
| Input type | 2x current mode inputs, XLR and RCA connectors available |
| Input impedance | <100mΩ, virtual ground inputs |
| Gain | 6 steps (gain dependent on the cartridge internal resistance) |
| Equivalent input noise (EIN) | <-135dBu without X1 unit / <-138dBu with X1 unit / 1Ω termination, gain +70dB, 22kHz BW |
MM/MC voltage input
| Inputs type | 1x voltage mode inputs, XLR and RCA connectors available |
| Input impedance | Variable from 100kΩ to 20Ω |
| Gain (at 1kHz) | +35dB, +40dB, +55dB, +60dB, +65dB, +70dB |
| Equivalent input noise (EIN) | <-130dBu without X1 unit / <-135dBu with X1 unit / 1Ω termination, gain +70dB, 22kHz BW |
Playback equalization filter
| Default equalization filters | RIAA, enhanced RIAA (additional Neumann pole) |
| Optional equalization filters | EMI, Columbia, Decca and Teldec |
| Equalization filters accuracy | +/- 0.1dB |
High pass filter (bypassable)
| Filter order | 3rd order (-18dB per octave) |
| Cut-off frequency | 10Hz |
Analog outputs
| Output level | Up to 8V RMS (balanced), Up to 4V RMS (unbalanced) |
| Frequency response | > 400kHz (RIAA equalization filter disconnected), current input selected |
| Total Harmonic Distortion + Noise | <0.01%, 1kHz, output level 3V RMS, 22kHz BW |
General
| Display | 480x272 pixels, 24bits color, AMOLED |
| Mains operation | Selectable 100V, 115, 230V AC, 47-63Hz |
| Fuses value and location | Standby fuse (black holder): 250mA T (230V AC), 500mA T (100V AC, 115V AC) Main fuse (white holder): 1.6A T (230V AC), 3.15A T (100V AC, 115V AC) |
| Power supply consumption | <1W (standby), 100W max in operation |
| Remote control | Ethernet based system control via the Android CH Control App |
Options boards
P1 Enclosure | P1 enclosure The addition of a second P1 enclosure transforms the P1 into a True Monaural phono stage. The power supplies inside each enclosure are devoted to a single channel, further enhancing the noise performances of the system. The units are controlled simultaneously. |
EQ
| Additional EQ curve boards |
External power supply
X1
| X1 external power supply Improves the overall P1 performances by adding an external power supply unit. Same unit dimensions as the P1 |
