I'm looking for options for building a buffered, multi-output splitter for a guitar signal to feed several amplifiers or DI lines. Yay or nay?

If you are buffering for each input to each transformer there should be no problem but, there are no specs on the frequency characteristics. The stated impedance is 600 ohms but with the small size, I would think the low-end frequencies would drop off quite rapidly. My application was for isolation of the ground circuit.

primary to secondary hipot ?

Not sure as I had no need to test. My application was in a simple iso circuit for computer audio interface. They were great for the price. Previously I would use Radio Shack transformers for the same application.

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HiLetgo 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1

Product ID: 44637162

Details

Brand
HiLetgo
Item Weight
0.03 Kilograms
Mounting Type
PCB Mount
Power Source
Corded
Specification Met
RoHS

⚡Stable high-pressure performance

🎵290mH inductance ±20%

🔄1:1 impedance ratio

R$113

Duties & taxes included

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Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎧 Elevate your sound game with flawless isolation and zero compromise!

ROBUST BUILD QUALITY - Nickel alloy core with QA-1 0.06MM double-wire winding for durability
VALUE PACK ADVANTAGE - 5-pack bundle to future-proof your audio projects and avoid downtime
CONSISTENT PERFORMANCE - Stable inductance of 290mH (±20%) for reliable audio fidelity
PLUG PLAY CONVENIENCE - PCB mount design for seamless integration into professional setups
PRECISION AUDIO ISOLATION - 600Ω AC impedance ensures crystal-clear signal separation

The HiLetgo EI14 Audio Coupling Isolation Transformer offers a 1:1 impedance ratio of 600Ω, delivering high-pressure stability and consistent inductance of 290mH (±20%). Crafted with a nickel alloy core and precision double-wire winding, this 5-piece set is designed for professional-grade audio isolation, ensuring minimal signal loss and enhanced sound clarity. Ideal for PCB mounting, it’s a must-have for audiophiles and engineers seeking reliable, high-efficiency transformers.

Specifications

ASIN	B073PXK2RX
Best Sellers Rank	#66,867 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Isolation Transformers
Brand	HiLetgo
Brand Name	HiLetgo
Customer Reviews	4.5 out of 5 stars 122 Reviews
Item Weight	0.03 kg
Manufacturer	HiLetgo
Minimum Frequency	50 hertz
Model	3-01-1453
Mounting Type	PCB Mount
Number of Items	1
Part Number	3-01-1453
Power Source	Corded Electric
Specification Met	RoHS
Unit Count	5 Count

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