Audio Splitter 1×3

Professional 1-in-3-out audio distributor designed for broadcast, live sound, AV system integration, and recording studios. Featuring a single-input-to-three-output architecture, it supports balanced/unbalanced line-level signal distribution, ensuring lossless transmission and low-noise output. Built-in isolation transformers effectively eliminate ground loop interference and support long-distance cabling (>100 meters). The unit delivers an optimal balance of flexibility and isolation performance, making it ideal for synchronized audio distribution across multiple devices.

Product Features

• 1-in-3-out split: One XLR input to three independent XLR outputs, supporting balanced/unbalanced signals with zero signal attenuation;
• Noise Isolation: Built-in isolation transformer with >50 dB ground loop suppression, eliminating hum and EMI interference;
• Professional Connectivity: XLR/TRS balanced inputs, RCA/1/4″ output combinations (optional), for seamless integration into PA or AV systems;
• Zero-Latency Design: 0 transmission latency ensures real-time synchronization;
• Power Requirements: No power supply required;
• Rugged Construction: Compact metal housing, suitable for environments from 0°C～50°

Interface

• XLR/TRS balanced input connectors;
• 3 XLR output connectors.

Applications:

• Broadcast Studio: Splits main line-level signals to multiple monitors or recorders, ensuring synchronized, interference-free operation;
• Live PA System: Splits output from the mixing console to main/auxiliary speakers and monitors, supporting long-distance cabling;
• AV Integration: Split sending of audio from one source to multiple screens in conference rooms or educational environments, matching projectors anddisplays;
• Recording Studio: Bridges audio cables to multitrack recording equipment, providing isolated outputs to prevent noise coupling.

Specification

Category	Parameter Item	Parameter Description
Audio Performance	Input Channels	1 x XLR Female connector (Balanced/Unbalanced)
	Output Channels	3 x XLR Male connectors (Individually Isolated)
	Frequency Response	20 Hz～20 kHz (±0.1 dB)
	Total Harmonic Distortion + Noise (THD+N)	< 0.005% (1 kHz, 0 dBu)
	Signal to Noise Ratio (SNR)	> 110 dB (A-weighted)
	Dynamic Range	> 115 dB
	Maximum Input Level	+26 dBu (balanced); +20 dBu (unbalanced)
	Maximum Output Level	+26 dBu (per output)
	Crosstalk	< -90 dB (between channels)
Isolation and Noise Suppression	Isolation Type	1:1 Professional-grade transformer
	Isolation Voltage	> 1 kV (input/output)
	Ground Loop Noise Rejection	> 50 dB (50/60 Hz)
	EMI/RFI Shielding	Built-in filter circuit (>40 dB attenuation)
	Maximum Transmission Distance	≥100 m (balanced output, no attenuation)
Interfaces and Connections	Input Connector Standard:	1 x XLR female;
	Output Connector Standard:	3 x XLR male (balanced); Optional: 3 x 1/4″ TS (unbalanced)
	Digital Interface	None (pure analog design)
	Impedance (Input/Output)	Input: 600Ω (balanced) / 600Ω (unbalanced); Output: 600 Ω (balanced)
Physical and Environmental	Dimensions (L x W x H)	70 mm x 36 mm x 100 mm
	Weight	0.47 kg
	Enclosure Material	Metal housing, blue painted
	Operating Temperature	0°C～50°C
	Storage Temperature	-20°C～70°C
	Humidity	5%～95% (non-condensing)
Power and Safety	Power Input	No adapter required, passive power supply
	Power Consumption	< 5 W (typical, all outputs active)

Audio Merger 3×1

Professional-grade 3-in-1 audio mixer designed for broadcast, live sound, recording studios, and AV system integration. The device supports merging three independent input signals (balanced or unbalanced line level) into a single output, ensuring lossless blending and low-noise transmission. Featuring a built-in isolation transformer, it effectively eliminates ground loop interference and supports long-distance cabling (>100 meters). Offering superior balance between flexibility and universal connectivity, this device is ideal for multi-source audio mixing scenarios such as conference systems or multi-device monitoring setups.

Product Features

• 3-in-1-out merging: Three XLR inputs to a single XLR output, supporting line-level or mic-level signals with no signal attenuation or distortion;
• Noise Isolation: Built-in isolation transformer with >50 dB ground loop suppression, eliminating hum and EMI interference;
• Professional Connectivity: XLR balanced inputs, for seamless integration into PA or AV systems;
• Zero-Latency Design: 0 transmission latency ensures real-time synchronization;
• Power Requirements: No power supply required;
• Rugged Construction: Compact metal housing, suitable for environments from 0°C～50°C.

Interface

• 3 XLR balanced input connectors;
• 1 XLR output connectors.

Direct box

Professional single-channel passive impedance converter (Direct Box) designed for live performances, recording studios, and broadcast applications. The unit employs high-quality audio transformers to convert high-impedance unbalanced inputs to low-impedance balanced outputs, supporting long-distance cable transmission (>100 meters) without distortion while effectively eliminating ground loop noise, hum, and EMI/RFI interference. Its passive design requires no external power supply, offering plug-and-play functionality for connecting high-impedance sources like guitars, basses, and keyboards to professional mixing consoles or PA systems. The unit delivers an exceptional balance of audio fidelity and durability, ensuring natural tonal reproduction and reliable performance.

Product Features

• Single-channel passive design: Operates passively without batteries or power supply, supporting high-impedance input to balanced output conversion;
• Premium transformer: Built-in top-tier 10:1 audio transformer delivers flat frequency response and ultra-low distortion for high-fidelity signal transmission;
• Noise Isolation: >60 dB ground loop suppression with built-in ground lift switch eliminates 50/60 Hz hum and RF interference;
• Thru output: 1/4″ parallel Thru jack facilitates chaining amplifiers or effects processors;
• Flexible Input: Compatible with 1/4″ TS high-impedance plugs for instrument-level sources;
• Rugged Construction: Heavy-duty steel chassis with internal shielding, shock-resistant and durable for touring and stage environments;
• Impedance Matching: 133:1 impedance ratio for optimized level conversion (-20 dB shift), preventing signal overload;
• Compact Portability: Lightweight design for easy transport and integration into any audio system.

Interface

• L and R: XLR output connectors;
• GND: Ground lift switch to eliminate 50/60 Hz hum and RF interference;
• IN: 1/4″ TS high-impedance jack input for instrument-level sources;
• PAD: Gain adjustment knob for regulating input channel gain;
• THRU: 1/4″ parallel Thru jack for daisy-chaining amplifiers or effects processors.

Dual channel Audio Directo box

Professional dual-channel passive impedance converter (Direct Box) designed for live performances, recording studios, and AV system integration. Featuring dual professional-grade audio transformers, it enables seamless conversion from high-impedance unbalanced inputs to low-impedance balanced outputs. Supporting stereo signal processing, it effectively eliminates ground loop noise and EMI interference, ensuring distortion-free transmission over long cable runs (>100 meters). Built-in active attenuators and floating ground functionality facilitate matching high-output sources such as keyboards, synthesizers, and active instruments. Offering an exceptional balance of durability and audio fidelity, this unit is ideal for professional musicians and sound engineers.

• Dual-channel passive design: Independent processing for two channels, supporting stereo input to balanced XLR output. No power supply required; plug-and-play operation;
• Dual professional-grade transformers: Built-in dual high-quality 10:1 audio transformers deliver flat frequency response and low distortion, ensuring natural sound reproduction;
• Noise Isolation: >60 dB ground loop suppression eliminates hum and RF interference, enabling long cable runs without signal attenuation;
• Flexible Control: Each channel features an attenuator and ground lift switch for on-site adjustments;
• Multi-Input Compatibility: 1/4″ TS high-impedance input supports instruments, keyboards, and consumer devices; optional RCA/3.5mm input available;
• Rugged Construction: Heavy-duty steel chassis with internal beam frame provides shock resistance and durability for touring environments;
• Compact Portability: Metal enclosure facilitates easy transport for stage, studio, and installation systems.

Interface

• L and R: XLR output connectors;
• GND: Ground lift switch to eliminate 50/60 Hz hum and RF interference;
• L and R: 1/4″ TS high-impedance jack inputs for instrument-level sources;
• PAD: Gain adjustment knob to regulate input channel gain.

Audio Isolator

Professional stereo audio isolator specifically designed to address ground loop noise and long-distance signal transmission issues in multimedia systems. Under normal conditions, the shield voltage of audio or stereo signal transmission cables should be 0V. However, when ground loops occur, the voltage fluctuates around 0V, causing audio distortion, low-frequency humming, and high-frequency crackling from vehicle sparks. In severe cases, when transmission distances exceed 100 meters, high ground loop voltages may damage signal sources or receiving equipment, potentially endangering user safety. This product employs a built-in high-quality isolation transformer to achieve current isolation, effectively eliminating the aforementioned issues. It supports long-distance transmission (>100m without attenuation) and features a -20 dB attenuation DIP switch for convenient signal level matching. Combining a compact design with passive operation, it is suitable for home theater, automotive audio, professional PA systems, and broadcast environments.

• Complete Ground Isolation: Built-in dual-channel 1:1 audio isolation transformers provide current isolation, eliminating ground potential noise, hum, and spark interference while protecting equipment from high-voltage damage;
• Long-Distance Transmission Support: Optimized design enables lossless transmission over 100 meters, with impedance matching ensuring signal integrity and preventing distortion or phase shift;
• -20 dB Attenuation: Integrated attenuation switch (0 dB / -20 dB selectable) facilitates matching high/low-level sources, preventing overload and distortion;
• Passive Design: No external power required, plug-and-play compatibility with any stereo system;
• Professional Connectivity: XLR inputs/outputs (gold-plated), compatible with 3.5mm adapters; TRS connectors available as an option;
• Noise Suppression: >60 dB ground loop noise attenuation, EMI/RFI shielded enclosure, flat frequency response up to 80 kHz;
• Safety Protection: Built-in >4 kV ESD/TVS protection against surge and static damage, compliant with safety standards;
• Portable and Rugged: Metal housing, compact dimensions, operates in 0°C～50°C environments, easily integrated into fixed or mobile systems.

Interface

• OUT1 and OUT2: XLR output connectors;
• GND: Ground lift switch to eliminate 50/60 Hz hum and RF interference;
• PAD: 0 dB / -20 dB attenuation switch for matching high/low level sources and preventing overload and distortion;
• IN1 and IN2: XLR input connectors supporting instrument-level sources.

Pro Computer Audio interface

Professional plug-and-play computer audio interface designed for high-fidelity (Hi-Fi) audio enthusiasts and professional recording studios. Featuring two dedicated audio isolation transformers, it provides complete electromagnetic isolation to effectively eliminate computer ground potential noise, ground loop interference, and EMI/RFI noise, ensuring pure audio transmission and playback. Supporting high-resolution audio playback, it combines a low-noise DAC with a precision clock system to deliver exceptional Hi-Fi playback quality. Offering superior isolation performance and multi-channel support, it is ideal for desktop Hi-Fi systems, home theaters, and professional audio workstations.

• Plug-and-play design: USB Type-B interface requires no additional drivers, supports hot-swapping, and is compatible with Windows, macOS, Linux, and all domestic operating systems (HarmonyOS 3.0+, Kirin, etc.);
• Dual isolation transformers: Features two dedicated audio isolation transformers for complete current isolation, blocking computer ground noise and reducing background noise;
• High-Resolution Audio: Supports high-resolution audio playback with wide dynamic range, ensuring Hi-Fi-level detail reproduction;
• Professional DAC and Amplification: Utilizes a high-performance DAC chip combined with a headphone amplifier, supporting high-impedance headphones;
• Noise Suppression Technology: Low-jitter TCXO clock source eliminates EMI/RFI interference for a pristine audio environment;
• Multi-output support: Balanced XLR connectors for stereo and multi-channel Hi-Fi systems;
• Rugged design: Metal-shielded enclosure for electromagnetic interference protection, operating in environments from 0°C～50°

Interface

• Monitor Output: 3.5 mm monitor output jack with volume control knob;
• USB-B: USB Type-B audio interface port, supports USB power delivery with power indicator;
• GND: Ground lift switch to eliminate 50/60 Hz hum and RF interference;
• OUT1 and OUT2: XLR output connectors.

Pro USB & RCA Audio interface

Professional plug-and-play USB & RCA audio interface designed for desktop audio, multimedia systems, and portable applications. The device supports 2 RCA stereo inputs and 2 RCA stereo outputs, featuring built-in level control knobs and monitoring functionality for seamless signal switching, mixing, and monitoring. Compatible with all domestic operating systems (such as HarmonyOS, Kylin OS, UnionTech UOS, etc.), it requires no driver installation and operates plug-and-play, ensuring cross-platform universality. The device offers comprehensive functionality in level adjustment and integrated monitoring, making it suitable for home theaters, music production, and conference systems, guaranteeing pure audio transmission and real-time monitoring.

• Plug-and-play design: USB Type-C interface requires no additional drivers, supports hot-swapping, and is compatible with Windows, macOS, Linux, and all domestic operating systems (HarmonyOS 3.0+, Kirin, etc.);
• 2 RCA inputs/outputs: Supports dual stereo RCA inputs (mixed mode) and dual RCA outputs (split or mirrored), enabling 2-in-2-out functionality;
• Level Adjustment: Independent knobs for each input/output (-∞ to +20 dB) enable precise volume control to prevent overload or signal attenuation;
• Monitoring Function: Built-in 3.5 mm monitor output supports real-time headphone monitoring with independent volume control, ideal for DJing or recording applications;
• Low-Noise Transmission: Integrated EMI filtering and ground loop isolation provide >50 dB noise suppression, ensuring high-fidelity audio (SNR > 96dB);
• Compact and portable: No external power required (USB-powered), metal housing, suitable for desktop or mobile use;
• Compatible and expandable: Supports ASIO/Core Audio drivers (optional download), compatible with professional DAW software.

Interface

• USB-C: USB Type-C audio interface supporting USB power delivery with power indicator light;
• Monitor Output: 3.5 mm monitor output jack with volume control knob;
• IN/OUT: Select audio input or output from monitor IN/OUT ports;
• IN L and R: RCA stereo left and right channel inputs; LEVEL: Input level adjustment for precise volume control, preventing overload or signal attenuation;
• OUT L and R: RCA stereo left and right channel outputs; LEVEL: Output level adjustment for precise volume control, preventing overload or signal attenuation.

Application

• Home Multimedia System: Switch between multiple RCA sources (e.g., CD players, turntables) to an AV receiver with monitor preview support.
• Music Production Starter: 2 inputs mix to output with level adjustment for simple recording, compatible with domestic tablet/mobile OS.
• Conferencing & Education: Plug-and-play connection from computer to speakers; monitor function allows presenters to adjust volume.
• Portable DJ/Mobile Applications: USB-powered, compact design for real-time audio management on HarmonyOS devices.

Category	Parameter Item	Parameter Description
Audio Performance	Input Channels	2 x Stereo RCA (Unbalanced, Line Level)
	Output Channels	2 x Stereo RCA (Unbalanced) + 1 x 3.5 mm Monitor (Stereo)
	Sampling Rate	44.1 kHz / 48 kHz (USB Mode)
	Bit Depth	16-bit
	Frequency Response	20 Hz～20 kHz (±0.5 dB)
	Total Harmonic Distortion + Noise (THD+N)	< 0.01% (1 kHz, 0 dBu)
	Signal to Noise Ratio (SNR)	> 96 dB (A-weighted)
	Dynamic Range	> 96 dB
	Maximum Input Level	+26 dBu (RCA); Monitor Output: +8 dBu
	Level Adjustment Range	-∞～+20 dB (per channel independent knob)
Isolation and Noise Suppression	Noise Suppression	> 50 dB (EMI/RFI filtering); Ground loop isolation (>40 dB, 50/60 Hz)
	Crosstalk	< -80 dB (channel separation)
	Maximum Transmission Distance	> 50 m (RCA cable, no attenuation)
Interfaces and Connectivity	USB Interface	USB Type-C (power + data, 5V/500 mA)
	Input Connectors	2 x RCA female jacks (gold-plated, unbalanced)
	Output Connectors	2 x RCA female jacks (gold-plated, unbalanced); 1 x 3.5 mm TRS (monitoring, 16-32 Ω headphones)
	Impedance (Input/Output)	Input: 10 kΩ; Output: 1 kΩ
Compatibility and System	OS Compatibility	Windows 7, 8, 10, 11+, macOS, Linux (ALSA), HarmonyOS 3.0+, Kirin OS, and other domestic systems (Plug-and-Play)
	Driver Support	Driver-free (UAC 2.0 compatible); optional ASIO 2.0/Core Audio
	USB Protocol	USB Audio Class 1.0/2.0, hot-swappable
	Latency	< 5 ms (USB transmission)
Physical and Environmental	Dimensions (L x W x H)	70 mm x 36 mm x 100 mm
	Weight	0.39 kg
	Enclosure Material	Metal, blue spray-painted
	Operating Temperature	0°C～50°C
	Storage Temperature	-20°C～70°C
	Humidity	5%～95% (non-condensing)
Power and Safety	Power Input	USB-powered (5V DC, from host)
	Power Consumption	< 2 W (typical, all channels active)
Software and Control	Configuration Tool	No software required
	Compatible Software	DAW (Audacity, Reaper), media players (VLC, Foobar2000)