Radial Engineering (Twin-ISO)

[Veri]

Hey Guys. I was wondering if anyone here has some feedback on this brand? From what I gather, Radial acquired Jensen so their products should use high quality transformers. I can't read any negatives online either. I suppose one can't go wrong with this brand for this kind of product?

This is the inside of their popular line isolator product.:

 

[pozz]

They are well-regarded in the pro scene. Expensive though.

 

[Speedskater]

Do they really have a 600 Ohm input impedance?

 

[Veri]

They are well-regarded in the pro scene. Expensive though.

Right! The Jensen brand version of the same thing is more expensive and should be built on the same transformer which I find confusing... I guess Jensen is a more luxurious brand name than Radial.

Do they really have a 600 Ohm input impedance?

That seems to be the case, yes.

 

[GeorgeBynum]

If it's PRIMARILY a transformer, impedance on one side (1:1 windings which google confirms) inherently is mostly whatever is on the other side ... 200 ohm load presents 200 ohms to input TRANSFORMER terminals. etc, etc

 

[Rja4000]

https://www.audiosciencereview.com/...ents-how-to-get-the-signal-level-right.14831/

I own a JDI duplex J48 and SAT-2.
All are excellent, with a strong preference for the passive ones.

You'll find some analysis in the link above...

 

[Veri]

If it's PRIMARILY a transformer, impedance on one side (1:1 windings which google confirms) inherently is mostly whatever is on the other side ... 200 ohm load presents 200 ohms to input TRANSFORMER terminals. etc, etc

That's what I thought, too =) thanks

 

[AnalogSteph]

Up to a point, anyway. Transformers have finite inductance and some parasitic capacitance, not to mention magnetic losses, so I would expect their impedance to tank at the extremes of the frequency spectrum and only go up a certain point in the middle.

 

[Veri]

I got one of these used for cheap. Using it XLR in XLR>RCA adapter out to get full balanced voltage into the single ended Topping L30 input. Impossible without a 1:1 transfo or similar buffer circuit like Neurochrome offers.

Works well. No hint of distortion. Ridiculous power on the L30 now, I can't say it's necessary whatsoever; but I can say that I've done it and it works

 

[Panelhead]

Those transformers look like outputs. The input transformers are cylindrical.
The Pro gear uses 600 ohms. Less noise pickup..