Specifications

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A Versatile Control Hub for Home Audio System
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A Versatile Control Hub for Home Audio Systems
Triple Inputs | Balanced Transmission | HPF Control
In August 2023, we received a wave of user feedback requesting a preamplifier with multiple audio inputs —a feature missing from much of the market. We launched a community-wide discussion on ASR and the Fosi Audio forum, gathering invaluable insights from users around the world.
We will continue to listen carefully, record your feedback promptly, and make efforts to turn your ideas and suggestions into reality.
Balanced interconnect systems are great. All balance internal circuits are an expensive engineering challenge. --Speedskater from ASR
I bet everyone needs a preamp for their fancy DAC, why on earth would it have another DAC? Keep it as simple as possible. Inputs, outputs, volume control (+remote), input selector, done. --Negatywny from ASR
Sub output with high pass filter for the speaker outputs, possibly with adjustable frequency. we all want to manage the subwoofer by splitting the frequencies, but nobody seems to care. --Talisman from ASR
Yes, add additional circuitry to make it capable of driving both sets of outputs simultaneously. --JayGilb from ASR
Easily connect up to three audio sources and switch inputs instantly with the remote for seamless audio control.
Easily connect up to three audio sources and switch inputs instantly with the remote for seamless audio control.
Equipped with three input ports: RCA 1, RCA 2, XLR and three output ports: RCA, XLR, Sub-Out, which makes it easy to connect multiple audio sources for a truly flexible listening experience.
Metallic texture, series design and refined, with enhanced resistance to electromagnetic interference.
Offers three levels of high-pass filtering: 20Hz-20kHz, 80Hz-20kHz,120Hz-20kHz. Ensures that only the high-frequency part is sent to the main speakers, enhancing vocal clarity and detail resolution.
Bypass
Bass and Treble Control
Balance Adjustment
Volume Memory
Enjoy a very clean, noise-free listening experience by bypassing the tone control circuit.
Achieve personalized tuning with a midpoint reference for better sound customization.
Adjust the volume balance between the left and right channels.
Automatically remembers the volume level for each input source. When switching sources, it adjusts to your previous level—making your HiFi system smarter and more user-friendly.
Enables synchronized on/off with audio setups, such as the ZD3/ZA3, automating system control for seamless.
Easily adjust the volume, switch sources, and control the power on/off without leaving your seat, with the remote control that can be used for multiple Fosi Audio products.
No compromise on materials, ensures low noise and accurate sound for a premium audio experience.
XLR balanced input and output deliver incredibly good spatial reproduction. Supports RCA and XLR signal conversion for broader device compatibility.
A handy control hub for all your audio sources, speakers, and subwoofer.
No longer abstract, the excellence of sound quality is now visible to the eye.
Crosstalk | ≤ -130dB
SINAD |≥113dB
SNR | ≥ 115dB
THD+N | ≤ 0.0007%
Noise Floor | ≤ 4μV
Specifications
Dimensions
239mm × 164mm × 54mm
Channel
2.0
Input
RCA x2, XLR
Output
RCA, XLR, SUB
Bass and Treble Control Range
Treble: ±6dB,Bass: ±12dB
Frequency Response
XLR/RCA: 20Hz-20kHz (±0.2dB), 80Hz-20kHz (±0.2dB), 120Hz-20kHz (±0.2dB)
SUB: 20Hz-200Hz (±0.2dB)
Frequency Response
XLR/RCA
20Hz-20kHz (±0.2dB)
80Hz-20kHz (±0.2dB)
120Hz-20kHz (±0.2dB)
SUB
20Hz-200Hz (±0.2dB)
Input Voltage Range
AC 110-240V
Balanced Output (XLR)
SNR
≥ 112 dB
Dynamic Range
≥ 112 dB
THD+N
≤ 0.0007%
Noise Floor
≤ 6μV
Single-Ended Output (RCA)
SNR
≥ 115 dB
Dynamic Range
≥ 115 dB
THD+N
≤ 0.0008%
Noise Floor
≤ 4μV
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