ZXYAUDIO EE24 Audio Transformer - Low Frequency Audio Signal Coupling & Isolation | Ni-Steel Lamination | Through-Hole DIP Pins

1. Product Overview

The EE24 is a low frequency audio transformer built for signal coupling and isolation in audio equipment. 100% pure copper magnet wire is wound on a high-permeability Ni-steel lamination core and wrapped in high-temperature Mylar tape, giving low distortion, ultra-low signal loss and a wide low-frequency response with enhanced bass reproduction.

The part terminates on standard 3 + 4 through-hole DIP pins with high coplanarity and secure bobbin solder joints, so it seats reliably and repeatedly in the board and is supplied ready for SMT/DIP PCB assembly. Every unit is 100% electrically tested. Electrical specification, dimensions and other parameters are customized to the application.

Figure 1 — EE24 audio transformer, low frequency audio signal coupling and isolation.

2. Key Features

Feature	Description
Signal coupling & isolation	Low frequency audio signal coupling and isolation for audio equipment.
Ni-steel lamination core	High-permeability Ni-steel lamination keeps distortion low and audio performance clean and accurate.
Pure copper + Mylar	100% pure copper magnet wire with high-temperature Mylar tape wrapping for low resistance and heat resistance.
3 + 4 DIP pin terminals	Standard through-hole DIP pin layout, 3 + 4 pins, ready for SMT/DIP PCB assembly.
100% electrically tested	Every unit is electrically tested for consistent frequency response and high stability.
High pin coplanarity	Pins are precisely aligned so the part seats reliably and repeatedly in the board.
Secure bobbin solder joints	Robust bobbin structure gives strong solder terminations and long-term reliability.

3. Advantages

Advantage	Description
Low Distortion	The high-permeability Ni-steel lamination core keeps audio signal distortion low and maintains clean, accurate audio performance.
Ultra-Low Signal Loss	100% pure copper magnet wire and precision winding keep audio signal loss to a minimum.
Wide Low-Frequency Response	The laminated core extends the low frequency response for enhanced bass reproduction.
Reliable PCB Mounting	Standard 3 + 4 through-hole DIP pins with high coplanarity and secure bobbin solder joints give stable, repeatable insertion.
Custom Build	Electrical specification, dimensions and other parameters are customized to the application.

4. Applications

Intended for audio equipment, including:

• Hi-Fi audio amplifiers
• Professional audio mixers
• Preamplifier coupling
• Audio signal isolation

Figure 2 — Audio equipment applications.

5. Specifications

5.1 Specification

Item	Value
Model Number	EE24
Usage	Audio equipment
Phase	Single
Coil Structure	TOROIDAL
Coil Number	AUTOTRANSFORMER
Product categories	Audio transformer
Material	Copper Wire+Ni-steel Lamination
Lead way	Pins
Packaging	Carton
Electrical Specification	Customized
Frequency	Low frequency transformer
Dimensions and other Parameters	Customized

Transcribed from the specification table supplied with the product artwork. Electrical specification, dimensions and other parameters are quoted as customized, so no numeric electrical data is available from the source material.

The supplied table lists the coil structure as TOROIDAL and the coil number as AUTOTRANSFORMER, while the supplied artwork shows a laminated core with through-hole pins. Both values are reproduced exactly as supplied; confirm the construction before publication.

5.2 Construction and materials

The winding uses 100% pure copper magnet wire for low resistance and high conductivity, wrapped in high-temperature Mylar tape for insulation and heat resistance. A tight, even precision winding craft is applied for stable performance. The core is Ni-steel lamination, a high-permeability material chosen to hold distortion low across the audio band.

Figure 3 — Premium copper wire and insulation.

Figure 4 — Ni-steel lamination and low distortion.

5.3 Terminals and PCB mounting

Termination is by through-hole DIP pins on a standard 3 + 4 pin layout. The pins are precisely aligned to a high coplanarity so the part seats reliably in the board, and the robust bobbin structure gives strong solder joints and long-term reliability. The parts are supplied ready for SMT/DIP PCB assembly.

Figure 5 — Standard PCB pin terminals.

5.4 Outline dimensions

The outline drawing gives a top view of 27.0 mm max by 24.0 mm max, a side view of 22.0 mm max by 25.0 mm max, and a front view height of 25.0 mm max. Pin pitch is 5.00 ± 0.50 mm, pin row spacing is 15.00 ± 0.50 mm, and the pin count is 3 + 4.

Dimension	Value
Top view	27.0 mm max × 24.0 mm max
Side view	22.0 mm max × 25.0 mm max
Front view height	25.0 mm max
Pin pitch	5.00 ± 0.50 mm
Pin row spacing	15.00 ± 0.50 mm
Pin count	3 + 4

Figure 6 — Outline dimensions, top, side, front and isometric views.

5.5 Compliance

Mark	Status as supplied
CE	CE mark, compliance
RoHS	RoHS compliant
ISO	ISO9001 quality management system
UL	UL recognized component

No certificate numbers or test reports accompany the supplied material; attach the certificates before publication.

Figure 7 — International quality standards and compliance as supplied.

6. Quality & Testing Assurance

Every unit is 100% electrically tested for high consistency and stability, and the parts are supplied ready for through-hole DIP PCB assembly. Consistent frequency response, high reliability and durability are the stated outcomes of that testing.

Figure 8 — 100% electrically tested.

Figure 9 — EE24 transformers on the test bench.

Figure 10 — EE24 transformer mounted on a PCB.