Howdy everyone!
After repairing and measuring sooooooo... many vintage and modern output transformers from no-name to legendary brands, we've had a good grasp on how they voice the output transformers, from the materials used, winding techniques, etc... to the sizing of cores.
If you're going after a certain tone, you can let us know and we can wind towards that. Else, we will do the best for each level (Level 0 to Level 3) of grading for our transformers, using the wide bandwidth winding method, with sufficient dynamic headroom for all sorts of music, including faithful 20Hz reproductions.
Our Level 2-3 output transformers are usually specified to ~10Hz @ -3dB region (or lower if required or paid for), and therefore anything at 20Hz is of no issues at all. We're not that worried on the high frequency response side as that's something easily manageable and easily achievable. We'd tend to just limit it at ~60k-75kHz to avoid unnecessary side effects but if one still want 100kHz, just let us know.
Just a refresher to all perhaps, we do offer OCC Cu, OCC Ag magnet wire transformers now, that we previously do not (maybe 2 years ago), due to the wire price, amount of orders and scarcity of such materials. Now, we can say that they're pretty common.
On the other hand, we have to keep the transformer repair price to at least U$200/pc and above. The amount of work involved are just too labor intensive and charging below that is just PAYING YOU TO REPAIR FOR YOU.
Each transformer requires around 1 week to complete. Say if we pay a technician to do so, at U$15/hour for 5 days, that would be whopping U$600 labor charge slapped onto the repair price. You see what we mean now?
Anyhow, we'd like to thank everyone that supported us so far to lead us till today. You're such a gem!
And, apologies for those that had hiccups in their projects. We will keep on improving ourselves and keep on serving you guys better.
J&K Audio Design
8/9/2019.
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