How to wire a audio transformer to replace a DRV134?

[mrjayviper]

this is the DRV134 circuit/diagram



The audio transformer was (in this case the pic was using Lundahl 1545a) was wired to the XLR input and then to the amp.


I've looked at the Lundalh 1545a datasheet but I can't understand how to wire it.

Thank you.

 

[JonSnell Electronic]

If the impedances are what you require;

 

[mrjayviper]

@JonSnell Electronic how do I know I have the right "impedance" when choosing the line input transformer?

Thank you

 

[JonSnell Electronic]

Your source, Microphone/CD Player etc, has an impedance stated by the manufacturer and the amplifier has also a stated input impedance, usually around 22k or higher.
There are many books about impedances in most reference libraries.

 

[JMFahey]

this is the DRV134 circuit/diagram

View attachment 1088370

The audio transformer was (in this case the pic was using Lundahl 1545a) was wired to the XLR input and then to the amp.
View attachment 1088374

I've looked at the Lundalh 1545a datasheet but I can't understand how to wire it.

Thank you.

I much fear you are downgrading your system with this Mod.

Lundahl Transformers are excellent, yet I doubt any transformer can meet, let alone surpass:

* Load capacitance (µF) 1

* THD + N @ 1 kHz (%) 0.0005

* Noise floor (RTO, 20 kHz BW) (dBu) -98

* Slew rate (Typ) (V/us) 15

* Small-Signal bandwidth (Typ) (MHz) 1.5

There are some areas where transformers are still unbeatable:

* weak low impedance signals such as dynamic microphones and MC pickups

* real galvanic isolation

* independence from ground

* long Audio lines, specially in a noisy environment

But: with line level signals, inside the same chassis, 10 cm away???

What´s the point?