Transrotor Phono Studio
Overview
The Transrotor Phono Studio embodies the German approach to audio refinement: meticulous construction in the service of a philosophy of perpetual improvement. This phono preamplifier combines MM/MC versatility with a technical architecture designed to eliminate any unwanted coloration, thus revealing every nuance etched into the groove.
Separate Power Supply: A Decisive Choice
The external power supply unit is the distinguishing feature of the Phono Studio. This physical separation eliminates the risk of electromagnetic interference with sensitive audio circuits. The external supply delivers a stabilized DC voltage, while the preamplifier incorporates a second filtering stage to perfect regulation.
This architecture results in a remarkably low noise floor and preserved dynamics. The power supply components, selected for their optimized performance, ensure smooth current delivery and perfect galvanic isolation.
MM/MC Versatility: Precision Settings
The Phono Studio adapts to all cartridges thanks to its 16 gain steps (38 to 64 dB) and variable impedance settings. For MM cartridges, the 47 kΩ input impedance is paired with an adjustable capacitance from 47 to 850 pF in 16 steps. MC cartridges benefit from an adjustable impedance of 100 to 1000 Ω, also in 16 steps.
These switches, mounted directly on the printed circuit board, prevent any signal loss or degradation due to intermediate connections. This approach guarantees optimal matching between cartridge and preamplifier, a prerequisite for faithful reproduction.
Sound Performance: Transparency and Dynamics
Technical measurements reveal a harmonic distortion rate of 0.03% and crosstalk of -62 dB. The frequency response extends from 20 Hz to 25 kHz with a tolerance of ±0.5 dB, strictly adhering to the RIAA equalization curve.
In listening, the Phono Studio stands out for its ability to reveal micro-details without adding coloration. Spatialization gains in precision, and the soundstage is structured with greater clarity. This transparency allows the unique characteristics of each cartridge to be fully expressed, without masking or unwanted additions.
Technical Specifications
Design and Compatibility
- Type: High-quality phono preamplifier
- Enclosure: Elegant and robust black finish in solid, anti-resonance aluminum
- Compatibility: Adjustable for all MM (moving magnet) and MC (moving coil) cartridges
Connectivity
- Inputs / Outputs: RCA connectors for easy integration
Audio Performance
- Precise amplification of low-level signals
- RIAA equalization compliant with standards
- Optimized for clear and dynamic sound
- Low-noise technology for faithful sound reproduction
Measurements
- Gain: 38 to 64 dB in 16 steps (suitable for MC and MM)
- MM input impedance: 47 kΩ
- MC input impedance: adjustable from 100 to 1000 Ω in 16 steps
- MM input capacitance: adjustable from 47 to 850 pF in 16 steps
- THD + N: 0.03%
- Crosstalk: -62 dB
- Signal-to-noise ratio: 68 dBA (at 65 dB gain), -80 dB (at 40 dB gain)
- Frequency response: 20 Hz – 25 kHz ± 0.5 dB (RIAA equalization)
Physical Characteristics
- Dimensions (W × D × H): 17.6 × 17 × 7 cm
Highlights
- Precise internal adjustments without signal loss
- Separate circuits for each channel
- Hand-selected audio components for outstanding stereo reproduction
- Stabilized external power supply and dual filtering for pure sound
- Wide adjustment range to suit all MM and MC cartridges
Frequently Asked Questions
What is the difference between an MM and MC cartridge when setting up the Phono Studio?
MM (Moving Magnet) cartridges deliver a stronger signal requiring less gain, while MC (Moving Coil) cartridges produce a weaker signal that needs more amplification. The Phono Studio automatically adapts thanks to its 16 gain steps and impedance settings specific to each type.
Why is a separate power supply important?
The external power supply eliminates electromagnetic interference that could pollute the delicate audio signal from the cartridge. This physical separation preserves signal purity and significantly improves the signal-to-noise ratio, which is especially crucial for low-output MC cartridges.
How do I correctly set the impedance for my cartridge?
Check your cartridge’s specifications: MMs generally use 47 kΩ, MCs vary between 100 and 1000 Ω. Start with the value recommended by the manufacturer, then adjust by ear. Too low an impedance will attenuate the highs; too high may create resonances.
Can the Phono Studio be used with any turntable?
Absolutely. The Phono Studio adapts to all turntables equipped with an MM or MC cartridge. Only the impedance and gain need to be adjusted according to the cartridge used. The standard RCA connectors ensure universal compatibility.
Does the Phono Studio really improve the sound compared to the built-in preamp in my amplifier?
Built-in phono preamps in amplifiers are often compromises. The Phono Studio, dedicated exclusively to this function, offers a separate power supply, fine-tuned settings, and anti-resonance construction that’s impossible to integrate into a multipurpose amplifier. The difference is evident in greater detail, better dynamics, and more precise spatialization.
- Eco-contribution included in the sale price.
