"Iron Projects"

This is the new kid on the block!!

Our "Active Ore" was way over due, we had so many people asking for an active version of the Iron ore that we started investigating on how we could finally add an impedance matching direct injection device that wouldn't ask for +30dB gain and more. So now specially for all your activate needs we introduce the "Active Ore"

The "Iron One SCL" is a single channel high grade direct input and signal balancing device designed for connecting Hi-Z instruments and audio equipment like acoustic or electric guitars, bass-guitars, synthesizers and electric piano's to the input of a microphone pre-amplifier. Combining the hi output impedance of an electric guitar to the low input impedance is an often misunderstood concept. Faillure to properly set the impedance of consecutive devices could lead to loss of high-end and frequency cancellations.

 

Here are some of the aplications for such a direct injection box:

- Convert unbalanced line level outputs to balanced microphone inputs.

- Eliminate hums and buzzes in the signal chain by transformer isolation.

- Allows for long cable runs without los of signal fidelity.

- Matches the high ouput impedance of guitar pickups to the low impedance input of a microphone preamplifier.

The "Iron One DCL" is a dual channel high grade direct input and signal balancing device designed for connecting Hi-Z instruments and audio equipment like acoustic or electric guitars, bass-guitars, synthesizers and electric piano's to the input of a microphone pre-amplifier. Combining the hi output impedance of an electric guitar to the low input impedance is an often misunderstood concept. Faillure to properly set the impedance of consecutive devices could lead to loss of high-end and frequency cancellations.

 

Here are some of the aplications for such a direct injection box:

- Convert unbalanced line level outputs to balanced microphone inputs.

- Eliminate hums and buzzes in the signal chain by transformer isolation.

- Allows for long cable runs without los of signal fidelity.

- Matches the high ouput impedance of guitar pickups to the low impedance input of a microphone preamplifier.

There can be found a lot of devices just like the "Iron One" on the market today and some of them are rather good, but most are highly overpriced. The "Iron Projects" differ from most devices because you can take your pick from the best direct injection transformers and stick it on the printed circuit board. This way you can test different transformers for colour and performance to get the best result for your application. Both the "Iron One" SCL and DCL come with Lundahl LL1935 transformers inside. The LL1935 is the cleanest high performance direct injection transformer available on the market today!

The "Iron One" Is a compact Di-box with a typical impedance conversion of 15k to 150 Ohm ( LL1935 = 10:1), although this depends of course on the impedance of your hi-Z instrument and the transformers turn ratio! To calculate the exact in/output impedance you need to divide whatever you put in there by the square of the transformers turns ratio(LL1935: 10² = 100)

 

Some Specifics:

- Neutrik connectors allow a long life-span.

- Military grade Vishay components offer durability.

- Frequency Response (transformer pending): 10Hz - 45kHz  +0 and max. -2dB! (Lundahl LL1935)

 

Transformer choice:

- The excellent, and our favored iron, Lundahl LL1935.
- The Jensen JT-DB-EPC, used by Radial Engineering in their JDI.
- Cinemags CM-DBXPC, picked by many manufacturers.

- (soon) Carnhill vtb9072, Neve's top choice!
- And then the most economical choice, the  in reverse installed microphone input transformer Pikatron ÜP3096M.

History:

Ever since we read about DIY Recording Equipment's "Ferrite Core Direct Box" project we were thinking about doing a similar project. So we based our first home designed project the "Iron Man" on his idea. Unknowingly we even designed a logo for the project that looked almost identical to his. Must have been a mind-fart because we extensively apologized when Peterson Goodwyn pointed this out to us!

 

So we redesigned the logo to bare resemblance to the actual Iron Man, and again Peterson Goodwyn was so kind to let us know that it was not a great idea to bring Marvels lawyers into play. Again we took his advise to heart, but kind of dropped the whole idea.

 

But the project always lingered in my mind. The renamed project "Iron One" even got a big brother, the "Iron Eight" which did make it all the way to it's production stage. And got picked up by Pro Sound News Magazine! For those who care to read the story: www.psneurope.com

The "Iron Eight" was actually built for Martijn Hermans, a mastering engineer over at sidamosae.be, but more as a substitute for an unfinished project. He built a Nord Keyboards Stage setup around the "Iron Eight" and requested two Lundahl, two Jensen and four Cinemag transformers inside the same device!

 

But the poor man's "Iron Eight" the single channel "Iron One" never made it to it's production phase!

 

One of the most difficult stages of a self designed project is it's enclosure. It only took me three years to figure out that designing a custom enclosure for the "Iron One" would never be a profitable venture, unless we got someone involved that knows his stuff! So we took the final step in this project, something that should have been done three years ago. We talked to Frank Röllen over at frontpanels.de about out predicament and just like we hoped he would he took this project to the next level!

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