SMSL
SMSL PH-1 High Fidelity MM PHONO Amplifier For Turntable 6.35mm Headphone jack
SMSL PH-1 High Fidelity MM PHONO Amplifier For Turntable 6.35mm Headphone jack
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SMSL PH-1 MM Phono & Headphone Amplifier
A dedicated sanctuary for your analog playback. Combining a high-performance 46dB Moving Magnet phono stage with a powerful desktop headphone driver.
Six Core Pillars of Sound
46dB Reference Gain
High-precision MM phono amplification stage elevates delicate turntable signals to pristine line levels.
Desktop Headphone Amp
Delivers up to 90mW x 2 @ 32Ω through a dedicated 6.35mm jack, driving headphones directly.
Pop-Noise Suppression
Integrated pop control protection prevents loud startup/shutdown pops, safeguarding your gear.
Silent Power Loop
Specialized ultra-low-noise power circuit layout guarantees an incredibly dark, silent background.
Shortest Signal Path
Optimized, ultra-short signal pathways prevent crosstalk and preserve fragile analog detail.
Compact CNC Case
Extremely small, travel-friendly chassis footprint milled out of solid, shielded aluminum alloy.
Preserving the Fragile Micro-Volts of Vinyl
Analog playback is a delicate art. The minute signals generated by Moving Magnet (MM) turntable cartridges are incredibly fragile, easily corrupted by electromagnetic interference. The SMSL PH-1 phono amplifier is designed specifically to protect this signal. Featuring a reference-class MM phono stage with a high gain of 46dB, it raises low-level cartridge signals to clean line levels with a remarkable distortion of just 0.008% (-81dB), keeping the original warmth of your vinyl intact.
A Private Late-Night Analog Lounge
Experience vinyl privately without needing massive amplification stacks. The PH-1 houses a dedicated desktop headphone amplifier stage outputting 90mW x 2 into 32 ohms via a robust front-panel 6.35mm jack. Controlled by a smooth, analog volume potentiometer, this circuit lets you connect your favorite dynamic headphones directly to the phono stage, establishing a quiet, late-night analog listening space.
Zero-Pop Control & Absolute Shielding
Say goodbye to unexpected start-up pops. An integrated physical pop control circuit suppresses sudden voltage spikes when powering the unit on or off, protecting both your headphones and speakers. Protected by an anodized, ultra-compact CNC aluminum chassis, the PH-1 blocks environmental high-frequency noise from corrupting your music, keeping the analog background completely silent.
The Dual-Stage Signal Pathway
The PH-1 acts as a pure analog bridge, boosting and refining your vinyl cartridge signals across three streamlined processing steps:
Receives the micro-volt signal from your Moving Magnet turntable cartridge. It applies precise RIAA-curve equalization and a clean 46dB gain boost to prepare the signal for outputs.
Diverts the pre-amplified analog signal to an onboard headphone driver stage, delivering up to 90mW of clean current, controlled by a smooth analog volume wheel.
Passes the equalized line-level analog signal directly to your reference integrated amplifier or active desktop speaker monitors, preserving the original analog warmth.
Frequently Asked Questions
What is the primary function of the SMSL PH-1?
A phono pre-amplifier is required because turntable cartridges output extremely weak signals (only a few millivolts) and require RIAA equalization curves. The PH-1 boosts this fragile signal by 46dB to standard line level while restoring the correct frequency spectrum, allowing you to connect your turntable directly to headphones or active speakers.
Does the PH-1 support Moving Coil (MC) cartridges?
No. The SMSL PH-1 is specifically optimized for Moving Magnet (MM) cartridges, offering an ideal gain stage of 46dB and input impedance matched precisely to MM cartridge requirements.
Why does it have a GND grounding terminal on the rear panel?
Turntables are prone to pick up low-frequency hum (ground loop hum) due to voltage differences between the turntable chassis and the pre-amp. Connecting the dedicated ground wire of your turntable to the PH-1's GND terminal safely grounds the system, resulting in a dead-silent, hiss-free background.
How is the PH-1 powered, and can I use a power bank?
Yes! The PH-1 operates on an ultra-efficient 1W power consumption and uses a 5V DC Type-C power input port. It can be easily powered by standard phone chargers, laptop USB ports, or portable power banks, offering excellent flexibility.
What is the advantage of the built-in pop control circuitry?
When powering standard amplifiers on or off, sudden voltage surges can cause a loud, jarring "pop" sound in your speakers or headphones. The PH-1's integrated pop control circuit suppresses these sudden spikes, keeping your equipment completely safe from sudden impulse damage.
SMSL PH-1 Specifications
| Parameter | Details |
|---|---|
| Input Interface | MM Phono Input (RCA) with dedicated GND Terminal |
| Output Interfaces | RCA Line Output / 6.35mm Headphone Jack |
| Headphone Output Power | 90mW x 2 (32Ω) |
| THD+N (Unweighted) | 0.008% (-81dB) |
| Channel Separation | -77dB (1kHz) |
| Phono Gain | 46dB |
| Signal-to-Noise Ratio (SNR) | 84dB |
| Frequency Response | 20Hz - 20kHz |
| Power Consumption | 1W |
| Power Input Port | DC 5V / 500mA (USB Type-C) |
| Dimensions & Weight | 94 x 30 x 96 mm (WxHxD) | 205g (0.45lbs) |
In the Box
Every SMSL PH-1 package includes essential accessories to secure an immediate, low-noise analog connection with your turntable system:
- SMSL PH-1 MM Phono Amplifier & Headphone Amp
- USB Power Supply Cable
- User Manual
