The ULN-2 possesses virtually every characteristic that is coveted in a Mic Preamp: exceptionally low noise at all gains, exceptionally high gain, excellent common mode and RFI rejection, incredibly flat frequency response, and ultra-low distortion. It simply increases the level of what you put into it without having to consider the nature of the source: Dynamic Mics, Phantom Powered Mics, Ribbon Mics, Instrument or line level signals are all handled with equal ease and quality.
So why change it?
The ULN-2 is an incredibly good Mic Pre, but sometimes you want something that isn’t quite "so pristine". It is well known that a certain amount of low-order harmonic distortion has a way of adding “depth” and “sheen” to everything — which explains the high regard for classic transformer coupled preamps.
Enter the Jensen Option
With the transformer option installed, the ULN-2 acquires that classic character. A few years ago, a prototype ULN-2 was fitted with a pair Jensen JT16-A's just for fun. It was found that there were some very nice benefits to transformer coupling the input stage of the ULN-2. The Transformers impart a more "glossy", "smoothed" sound than the capacitively coupled ULN-2, which simply faithfully passes the source. Sonically, it's kind of like the difference between images shot on film and images shot in HD.
Enjoy complete isolation
A second benefit is that the transformer completely electrically isolates the preamp from the source – raising the common mode rejection above its already excellent performance, and providing a measure of confidence when dealing with the unknowns of location sound.
How to get it
The transformer option requires factory installation; cap coupling must be removed from your existing ULN-2 and then the Jensen transformers are carefully added to the signal pat. You can have one or both channels customised.
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