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

1. Product Overview

ZXY-14 Audio Isolation Transformer (marked “ZXY-14 AUDIO”), a compact audio coupling transformer built on a high-permeability laminated core and supplied as a dual matched pair for stereo and differential audio channels. Each unit measures 18 × 14 × 25 mm overall and is fitted with 75 mm flexible pure-copper lead wires, colour-coded Red for one winding and Blue for the other. A dot marking identifies the start point of each winding, so polarity can be confirmed at a glance during assembly. The part is intended for professional audio use, where clean signal transfer, low distortion and reliable galvanic isolation are required.

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

Two ZXY-14 units side by side - compact footprint for dense layouts.

2. Key Features

• Compact size: 18 × 14 × 25 mm overall, with a 12 mm coil body - small enough for dense layouts.
• Dual matched pair: two transformers per set, produced and inspected so that both channels perform identically.
• Colour-coded leads: Primary = Red-Red, Secondary = Blue-Blue; each lead is 75 mm long with tinned stranded ends.
• Polarity reference: a dot marking on the winding identifies the start point of each coil.
• Laminated core: high-permeability laminated core for wide-band, low-loss signal transfer.
• Multi-layer winding: precision multi-layer winding for repeatable electrical performance and low distortion.
• Declared inductance: 906 mH ± 15 % (Red-Red) and 105.5 H ± 15 % (Blue-Blue), both 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 - PASS.

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

Precision laminated core with finished insulation and multi-layer winding.

3. Advantages

The ZXY-14 is engineered for audio excellence. Its laminated core and precision multi-layer winding keep insertion loss low and distortion minimal, while the transformer provides true galvanic isolation between the two windings. This breaks ground loops, removes hum, buzz and DC offset from the signal path, and lets equipment at different ground potentials be connected without a noise penalty.

• Noise-free signal path: galvanic isolation between windings removes ground-loop hum and interference.
• Consistent performance: matched winding and core assembly give high consistency from unit to unit.
• Audio quality: low distortion and stable response for microphone and line-level audio.
• Inspected individually: 100 % full electrical inspection on every single unit before packing.
• Insulation safety: strict HI-POT and insulation safety test at 500 Vrms / 5 mA / 1 s.
• Matched pairs: both channels of a stereo or differential link are supplied as a matched pair.
• Compliance-ready: CCC certified, CE compliant, RoHS compliant and UL recognized component.

Dual matched pair, prepared for high-precision audio signal transmission.

75 mm pure copper flexible leads, colour-coded Red-Red and Blue-Blue.

4. Applications

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

• Recording microphones: microphone signal coupling in studio and recording chains.
• Audio preamp & mixer: input and output isolation in microphone preamplifiers and mixing consoles.
• Audio interface & DI box: audio interfaces, DI boxes and instrument-level input stages.
• Signal isolation & coupling: galvanic isolation and signal coupling between separate pieces of audio equipment.

Typical further uses include balanced-to-unbalanced conversion, line-level isolation between separates, and any installation in which a ground loop between two audio devices must be broken without losing signal quality.

Main audio applications: recording microphones, audio preamp and mixer, audio interface and DI box, signal isolation and coupling.

5. Specifications

Table 1 - Electrical Specifications

Table 2 - Mechanical Specifications

Table 3 - Wiring and Connection

Orthographic four-view drawing and main dimensions (unit: mm).

Circuit schematic and wiring: Primary Red-Red, Secondary Blue-Blue; dot = start point of winding.

Declared electrical specifications at a glance.

6. Quality & Testing Assurance

Every ZXY-14 passes a full electrical inspection before packing. Each unit is measured for inductance and DC resistance on both windings and is then subjected to a HI-POT (dielectric strength) test at 500 Vrms / 5 mA for 1 second; only units that pass the test are released. Insulation safety, winding integrity and lead-wire condition are checked as part of the same routine factory inspection, and the transformers are supplied as factory-inspected matched pairs so that both channels of a stereo link behave consistently. The product carries CCC certification, CE compliance, RoHS compliance and UL recognized component status, supporting use in professional audio equipment intended for international markets.

100 % full electrical inspection, strict HI-POT and insulation safety, high consistency and low distortion.

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

Every unit is 100 % electrically inspected before packing. For datasheets, samples or OEM / ODM enquiries, please contact our sales team with your required quantity and destination port.