T15 Trim / Fader

[lkraven]

According to the product description, the T15 can have its trim pod wired as a fader. However, I wasn't able to find in the instructions how to wire it to act as a full fader.

I assume it's a resistor location that needs to be shunted... which one is it?

[JackofallTrades]

Look at the lower left hand corner of the PCB, next to the fader / trim knob. There are 2 options. Install a 0 ohm resistor across the Full Fader contacts (the top ones) OR the 5 db contacts (the bottom ones). In the pictures on the Assembly Instructions page you can see that is is soldered into the 5db position.

[tpryan]

Which version of the board do you have? For rev 1.1, a jumper at R27 gives a full fader, a jumper at R28 gives a 5dB trim as mentioned above. Rev 1.2 adds a buffer after the pot, so a 0R jumper at R27 gives a full fader, a 5K resistor gives a 5dB trim.

[T-rex]

Hey Tim,

Is there an advantage to the full fader as opposed to the 5 db trim? I ask because I totally see the advantage of it in the N72 but with this pre where it is all very clean, is there any sonic advantage?

[tpryan]

It's primarily a question of utility. If you'd rather have very fine adjustment than a fader, install a resistor at R27 as described in the assembly instructions.

[lkraven]

Just wanted to follow up. The new set of instructions were very clear about where to install the resistor for use as a trim or fader.

I'll just go out on a limb and say it here: you would miss it horribly if you had NEITHER a trim or fader, but between the TWO, for most applications, you won't notice much difference.

Wired as a 6db trim, it would give very fine control, but the reality is that even as a full fader, it is sensitive enough to give you just the amount of output you need or want.

I have it wired up as a full fader, and I have no trouble dialing in the exact amount of output I need, even if it's using a very fine adjustment on the knob. If it were a 6db trim knob, I'd be able to maybe get a little bit more control out of it, but I don't think anyone is going to miss having the extra control if they wire it as a full fader.

Just my 2c.