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Fosi Audio P4 HiFi Preamplifier $72.50 + free s/h
$73
$129
43% off
AliExpress
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AliExpressDeal Details
Fosi Audio via Aliexpress
Ships from a USA Warehouse
Pre-coupon price as of this post is $81.38
Apply coupon RDC9C to bring the price to $72.38
Ships from a USA Warehouse
Pre-coupon price as of this post is $81.38
Apply coupon RDC9C to bring the price to $72.38
- Studio-Level Signal Accuracy | ±0.1dB Frequency Response & 105dB SINAD
Pure, untainted reference-quality sound, tailored for discerning ears.
With a flat frequency response from 20Hz to 20kHz (±0.1dB) and a 105dB SINAD (Signal-to-Noise Ratio + Distortion), the P4 achieves nearly lossless signal transmission. Featuring Japanese Elna audio capacitors and Omron gold-plated signal relays, it eliminates current noise to ensure every detail is faithfully reproduced, rivaling the performance of high-end preamps costing tens of thousands. - Three-Input Hub | One-Touch Switch Between CD, Vinyl, and DAC
Say goodbye to constant plugging and unplugging, and build a multi-device Hi-Fi system.
Three independent RCA inputs allow you to simultaneously connect a turntable (with external phono preamp), CD player, and high-end DAC. With the infrared remote, you can easily switch between sources with a single button press. Whether you're enjoying your classic vinyl collection or streaming Hi-Res music, simply press a button to experience seamless listening. - Gain Staging + Motorized Potentiometer | Precision Matching for Power Amplifiers
Perfectly adaptable from low-sensitivity to high-resolution systems.
3dB/6dB/9dB Gain Adjustment:
▸ Low Gain (3dB): Protects sensitive power amplifiers from overload distortion.
▸ High Gain (9dB): Reduces system noise floor and enhances dynamic range.
The ALPS vintage motorized volume knob uses an analog potentiometer structure with left-right channel e-rror <0.1dB, ensuring smooth, unbiased volume control. - Tone Control Freedom | Adjustable EQ + Replaceable Op-Amps + Bypass Mode
From precise monitoring to personalized sound tuning, a dual-purpose machine.
Midpoint-adjustable bass and treble: Compensate for room acoustics or enhance rock/jazz atmospheres.
Hi-Fi Bypass Mode: Direct signal path with the EQ circuit bypassed, delivering uncolored, high-resolution sound.
Replaceable op-amp design: Compatible with popular dual-op-amp chips (such as MUSES02/OPA2604), allowing you to easily customize the sound signature to your preference—whether it's a "warm tube-like" or "crisp, analytical" tone. - Minimalist Control Aesthetic | Full-Function Remote + Compact Metal Chassis
Ideal for both desktop and rack setups, blending seamlessly into high-end systems.
Comprehensive remote control: Power on/off, switch inputs, and adjust volume/mute without the awkward "bending over to find the knob" experience.
PRE OUT Output: Connect an active subwoofer for a 2.1 system, or link multiple amplifiers for multi-room audio.
- Model: P4
- Power Adapter Output: 12V/1.5A
- Product Adapter Input Voltage Range: AC 110V - 240V
- SNR ≥ 110dB
- THD ≤ 0.003%
- Treble adjustment range: ±6dB
- Bass adjustment range: ±12dB
- Input Mode: 3 RCA
- Output: RCA/AUX
- Frequency Response: 20HZ -20KHZ((±0.1dB)
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Fosi Audio via Aliexpress
Ships from a USA Warehouse
Pre-coupon price as of this post is $81.38
Apply coupon RDC9C to bring the price to $72.38
Ships from a USA Warehouse
Pre-coupon price as of this post is $81.38
Apply coupon RDC9C to bring the price to $72.38
- Studio-Level Signal Accuracy | ±0.1dB Frequency Response & 105dB SINAD
Pure, untainted reference-quality sound, tailored for discerning ears.
With a flat frequency response from 20Hz to 20kHz (±0.1dB) and a 105dB SINAD (Signal-to-Noise Ratio + Distortion), the P4 achieves nearly lossless signal transmission. Featuring Japanese Elna audio capacitors and Omron gold-plated signal relays, it eliminates current noise to ensure every detail is faithfully reproduced, rivaling the performance of high-end preamps costing tens of thousands. - Three-Input Hub | One-Touch Switch Between CD, Vinyl, and DAC
Say goodbye to constant plugging and unplugging, and build a multi-device Hi-Fi system.
Three independent RCA inputs allow you to simultaneously connect a turntable (with external phono preamp), CD player, and high-end DAC. With the infrared remote, you can easily switch between sources with a single button press. Whether you're enjoying your classic vinyl collection or streaming Hi-Res music, simply press a button to experience seamless listening. - Gain Staging + Motorized Potentiometer | Precision Matching for Power Amplifiers
Perfectly adaptable from low-sensitivity to high-resolution systems.
3dB/6dB/9dB Gain Adjustment:
▸ Low Gain (3dB): Protects sensitive power amplifiers from overload distortion.
▸ High Gain (9dB): Reduces system noise floor and enhances dynamic range.
The ALPS vintage motorized volume knob uses an analog potentiometer structure with left-right channel e-rror <0.1dB, ensuring smooth, unbiased volume control. - Tone Control Freedom | Adjustable EQ + Replaceable Op-Amps + Bypass Mode
From precise monitoring to personalized sound tuning, a dual-purpose machine.
Midpoint-adjustable bass and treble: Compensate for room acoustics or enhance rock/jazz atmospheres.
Hi-Fi Bypass Mode: Direct signal path with the EQ circuit bypassed, delivering uncolored, high-resolution sound.
Replaceable op-amp design: Compatible with popular dual-op-amp chips (such as MUSES02/OPA2604), allowing you to easily customize the sound signature to your preference—whether it's a "warm tube-like" or "crisp, analytical" tone. - Minimalist Control Aesthetic | Full-Function Remote + Compact Metal Chassis
Ideal for both desktop and rack setups, blending seamlessly into high-end systems.
Comprehensive remote control: Power on/off, switch inputs, and adjust volume/mute without the awkward "bending over to find the knob" experience.
PRE OUT Output: Connect an active subwoofer for a 2.1 system, or link multiple amplifiers for multi-room audio.
- Model: P4
- Power Adapter Output: 12V/1.5A
- Product Adapter Input Voltage Range: AC 110V - 240V
- SNR ≥ 110dB
- THD ≤ 0.003%
- Treble adjustment range: ±6dB
- Bass adjustment range: ±12dB
- Input Mode: 3 RCA
- Output: RCA/AUX
- Frequency Response: 20HZ -20KHZ((±0.1dB)
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