ZXY-14 Audio Isolation Transformer - Dual Matched Pair Laminated Core Audio Coupling Transformer for Studio Microphone Preamps and Mixing Consoles

1. Product Overview

The ZXY-14 audio isolation transformer (marked "ZXY-14 AUDIO") is a compact audio coupling transformer built on a high-permeability laminated core, supplied as dual matched pairs for stereo and differential audio channels. Each unit measures 18 × 14 × 25 mm overall and is equipped with two 75 mm flexible pure copper leads — one winding identified in red and the other in blue. A dot marking on each winding identifies the start terminal, enabling clear polarity confirmation at a glance during assembly. This product is engineered for professional audio applications requiring clean signal transmission, low distortion, and reliable electrical isolation.

ZXY-14 dual matched pairs deployed in a professional studio signal chain.

Two ZXY-14 units shown side by side — compact footprint ideal for high-density layouts.

2. Key Features

• Compact size: 18 × 14 × 25 mm overall, with a coil body of only 12 mm, ideal for high-density layouts.
• Dual matched pairs: Each set includes two transformers, produced and tested to ensure perfectly matched performance across both channels.
• Color-coded leads: Primary = red-red, secondary = blue-blue; each lead is 75 mm long with tinned stranded ends.
• Polarity reference: Dot markings on the windings identify the start of each coil.
• Laminated core: High-permeability laminated core for wideband, low-loss signal transmission.
• Multi-layer winding: Precision multi-layer winding process ensures consistent electrical performance and reduced distortion.
• Nominal inductance: 906 mH ± 15 % (red-red) and 105.5 H ± 15 % (blue-blue), measured at 100 Hz.
• DC resistance: 18.3 Ω ± 10 % (red-red) and 925 Ω ± 10 % (blue-blue).
• Dielectric strength: 500 Vrms / 5 mA for 1 second — passed.

High-permeability laminated core, precision multi-layer winding, and pure copper leads.

Precision laminated core with complete insulation treatment and multi-layer winding.

3. Product Advantages

The ZXY-14 is designed for superior audio performance. Its laminated core and precision multi-layer winding keep insertion loss low and distortion minimal, while the transformer provides true electrical isolation between the two windings. This breaks ground loops and eliminates hum, buzz, and DC bias from the signal path, enabling noise-free interconnection of equipment at different ground potentials.

• Noise-free signal path: Electrical isolation between windings eliminates ground loop hum and interference.
• Consistent performance: Matched windings and core assemblies ensure high unit-to-unit consistency.
• Audio quality: Low distortion and stable response suitable for microphone-level and line-level audio.
• Individually tested: Every unit undergoes 100 % full electrical testing before packaging.
• Insulation safety: Strict HI-POT withstand and insulation safety testing at 500 Vrms / 5 mA / 1 s.
• Matched pair delivery: Both channels in stereo or differential links are supplied as matched pairs.
• Compliance certifications: CCC certified, CE compliant, RoHS compliant, and UL recognized component.

Dual matched pairs, ready for high-precision audio signal transmission.

75 mm pure copper flexible leads with red-red and blue-blue color coding.

4. Application Areas

The ZXY-14 is specifically designed for audio signal coupling and isolation in professional and personal recording studio equipment.

• Recording microphones: Microphone signal coupling in studio and recording chains.
• Audio preamps and mixing consoles: Input/output isolation for microphone preamps and mixer consoles.
• Audio interfaces and DI boxes: Audio interfaces, DI boxes, and instrument-level input stages.
• Signal isolation and coupling: Electrical isolation and signal coupling between independent audio devices.

Other typical applications include balanced-unbalanced conversion, line-level isolation between separate units, and any installation requiring a ground loop to be broken between two audio devices without signal quality loss.

Key audio applications: recording microphones, audio preamps and mixing consoles, audio interfaces and DI boxes, signal isolation and coupling.

5. Technical Specifications

Table 1 - Electrical Specifications

Table 2 - Mechanical Specifications

Table 3 - Wiring and Connections

Orthogonal four-view drawing with key dimensions (in mm).

Schematic and wiring: primary red-red, secondary blue-blue; dot = winding start.

Electrical specifications at a glance.

6. Quality and Testing Assurance

Every ZXY-14 unit undergoes comprehensive electrical inspection before packaging. Inductance and DC resistance are measured on both windings of each unit, followed by a 500 Vrms / 5 mA / 1 second withstand (dielectric strength) test; only units that pass are released for shipment. Insulation safety, winding integrity, and lead condition are all checked as part of the same routine factory inspection. Transformers are supplied as factory-tested matched pairs, ensuring consistent performance across both channels in a stereo link. The product is CCC certified, CE compliant, RoHS compliant, and a UL recognized component, supporting professional audio equipment applications in international markets.

100% comprehensive electrical inspection, rigorous withstand voltage and insulation safety testing, high consistency, and low distortion.

International certifications and compliance: CCC certified, CE compliant, RoHS compliant, UL recognized component.

Every unit undergoes 100% electrical inspection before packaging. For datasheets, samples, or OEM/ODM inquiries, please contact our sales team with your required quantity and destination port.