ZXY: 26 Years of Excellence as a Leading Transformer and Inductor Manufacturer ・ One-Stop Solutions

English

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer 1

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer 2

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer 3

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer 4

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer 5

EI14 600:600 Ohm Low Frequency Audio Isolation Transformer

EI14 audio isolation transformer is built with standard EI core structure and equipped with 3+2 pins for convenient circuit installation. Optimized for low-frequency audio signal transmission, it delivers steady frequency response and effectively isolates ground loop noise to improve audio clarity. Adopting precise winding process, this low frequency audio transformer maintains stable electrical performance and low signal distortion during operation. Compact EI14 size saves internal space of audio devices, perfectly matching various audio equipment including preamplifiers, audio interfaces and signal processors.

Model Series:

EI14 (EI1401-600:600)

Compliance:

RoHS, REACH Compliant

Operating Temperature:

-25°C to +85°C

Winding Wire:

High-Purity Enamelled Copper Wire

Core Material:

High-Permeability Silicon Steel / EI Lamination

Frequency Range:

300 Hz – 3.4 kHz (Voice/Telecom standard) / Up to 20 kHz (Audio Grade)

Pin Layout / Mounting:

3 + 2 Pins / Through-Hole DIP

Transformer Type:

Low Frequency Audio Isolation Transformer

Inquiry

Write a Review

product Parameter

Parameter Item	Specification / Range
Product Model	ZXY-EI14 (3+2 Pins Configuration)
Operating Frequency	20 Hz ~ 20 kHz (Audio Band)
Impedance / Turn Ratio	Custom (e.g., 600Ω : 600Ω, 1:1 / 1:2)
Primary Inductance	Custom Value (Tolerance: ±10% / ±15%)
Leakage Inductance	< 1.0% ~ 1.5% of Primary Inductance
Dielectric Strength (Hi-Pot)	1,500 VAC ~ 2,000 VAC
Insulation Resistance	≥ 100 MΩ
DC Resistance (DCR)	Custom (Targeted to minimize copper loss)

Product detail

Effective Ground Loop Isolation

Galvanically isolates primary and secondary circuits to eliminate ground loop hum, static, and interference in audio transmission paths.

Standard 600Ω

600Ω Impedance Matching: Ideal 1:1 coupling transformer for line-level audio signals, telephone communication interfaces, and audio coupling applications.

Compact 3+2 Pin PCB Design

THT (Through-Hole Technology) DIP layout allows for quick, secure through-hole mounting on printed circuit boards (PCBs).

Superior Audio Signal Integrity

Features high magnetic permeability core material to ensure low total harmonic distortion (THD) and low insertion loss.

Robust Insulation & Durability

Wrapped in high-temperature yellow insulating tape with rigid Bobbin housing, providing reliable dielectric breakdown strength and environmental durability.

RoHS & REACH Compliant

Manufactured strictly with eco-friendly raw materials, ensuring smooth international customs clearance and regulatory safety.

Product Showcase

faqs

What is the primary function of the EI14 Audio Isolation Transformer in audio equipment?

A: The EI14 Audio Isolation Transformer is specifically designed for low-frequency audio signal transmission, impedance matching, and ground loop isolation. It effectively eliminates hum, buzz, and interference caused by ground loops in audio signal paths, ensuring crystal-clear audio output and protecting sensitive downstream circuitry from voltage surges.

What are the standard pin configuration and impedance specifications for this EI14 model?

A: This model features a 3+2 pin DIP layout (typically 3 pins on the primary/input side and 2 pins on the secondary/output side). A standard option is 600Ω : 600Ω (1:1 impedance ratio), which is ideal for line-level audio isolation. However, custom primary/secondary impedance ratios (e.g., 600Ω to 10kΩ) and customized pinouts are available upon request.

What typical audio applications is the EI14 transformer best suited for?

A: The EI14 series is widely used in compact and professional audio electronics, including:
• Audio mixing consoles and preamplifiers
• Telephone/telecom audio interfaces and modems
• Radio communication equipment and walkie-talkies
• Ground loop noise isolators for car audio systems
• Intercom systems, PA (Public Address) equipment, and DI boxes

How does the EI14 handle audio frequency response and signal distortion?

A: Engineered with high-permeability nickel/silicon steel laminations and high-purity copper windings, the EI14 delivers high linear signal fidelity across the audio frequency band (typically 300Hz–3.4kHz for voice/telecom applications, or up to 20Hz–20kHz for high-fidelity custom designs). It provides low total harmonic distortion (THD) and minimal signal insertion loss.

Can I request custom impedance ratios, pin lengths, or encapsulation methods for the EI14?

A: Yes, absolutely. Backed by our 26+ years of R&D expertise, we offer full customization for the EI14 series. You can specify:
• Custom primary and secondary impedance or turns ratios
• Center taps (CT) on 3-pin windings
• Custom pin lengths, PCB pitch dimensions, or surface-mount/DIP styles
• Vacuum varnish dipping or epoxy potting for enhanced moisture resistance and mechanical durability

How do you ensure electrical safety and quality consistency for bulk production?

A: Every single EI14 transformer undergoes 100% automated electrical testing before dispatch, including Primary-to-Secondary Hi-Pot (dielectric breakdown) insulation testing, DC resistance (DCR) matching, and turns ratio verification. All raw materials comply with RoHS and REACH international standards and are backed by our 90 to 180-day quality warranty.

What is the typical lead time for EI14 samples and volume production?

A:
• Custom Prototyping/Samples: Typically 5 to 10 working days, with 2D/3D engineering drawings provided for approval prior to production.
• Bulk Production: Generally 15 to 30 days depending on volume and specs. Low MOQ is fully supported for initial engineering trials and sample runs.

Message Form

We Can Help You Solve Any Problem

Just leave your email or phone number in the contact form so we can send you a free quote for our wide range of designs!