Hey y'all,

2 part question here:

1. I just recently learned there is a whole class of drivers called field coil that require their own power supply. After listening to https://www.youtube.com/watch?v=Mhqw4sx7gBY this youtube video I am intrigued. My question is can a field coil driver be swapped in the same cabinet or baffle as a magnet driver. For example can I put a 15" field coil driver in a Zen Master OB speaker?

Side note: It sounds like the power supply of the field coil drivers allows QTS adjustments, similar to how the 10" open baffle zen master needs the ZROCK to adjust the qts.

2. Field coil drivers are pricey. I found some on a website called Lii Audio Hifi. It seems like this company is different than Lii Song but also sells the same drivers. Can someone help me understand what the relationship here is? Is Lii Audio Hifi as trustworthy/legit as Lii Song, are they the same company?

Thank you!

I don’t have any answers to your questions nor have any experience with field coil drivers. At some point in the past I asked the same question about Lii here in the forum and don’t recall ever getting a response. I emailed Lii Audio and asked about Lii Audio / Lii Song and got the following response:

“We are not Lii Song — they are one of our copies.
Our company focuses only on special, high-end drivers, designed for professionals and audiophiles who value precision and quality.
We’re completely independent, with our own R&D, materials, and sound tuning.
Please support us by sharing our work and following our official page — every bit helps us keep making true specialty drivers.”

So it seems they are not related but who is copying who is not clear. There are some forums debating this around the internet. I recall seeing one on Reddit but it was all speculation.

I am a big fan of Lii Song drivers and have had several of their offerings over the last 5 years or so. The Lii Audio drivers have piqued my curiosity and I’d love to hear some first-hand experience how they compare A/B to Lii Song.

Alex Scott….yes the S1WX loudspeakers use Sonido drivers from Hungary.  Istivan confirmed and said he was very upset that they broke his contract and relabeled them with S1WX logos and copy giving the appearance they were S1WX made.  Not sure what became of it all?  Looks like some changes/agreements have been made since my discussion with Istivan.. heres my drivers in a Sonido designed box.  I used a different tower design due to my listening space configuration.
https://sw1xad.co.uk/products/sw1x-studio-monitor-loudspeaker/