LuDEF

[BrianGasberg]

What pre are you using with it?

I am using a Pearl 3 -> Iron Pre (2021 pioneer batch, @6 dB gain) -> Full Range EQ -> Biamp6-24.

Driving my OB speakers:
https://www.diyaudio.com/community/threads/ultimate-open-baffle-gallery.123512/post-7639404

The LuDEF is driving the Full Range driver, and I am using a Class D amp for the BIANCO-15OB350 bass drivers.

 

[Dan K]

Have you tried going direct into the VAS traffo? Works great with the ACP+, also the Iron Pumpkin. I wired mine up with a switch, but it mostly just stays in bypass mode now.

 

[BrianGasberg]

Have you tried going direct into the VAS traffo? Works great with the ACP+ & also the Iron Pumpkin. I wired mine up with a switch, but it mostly just stays in bypass mode now.

No, actually I haven't tried much yet - can't stop listening to it long enough, to experiment

Driving the transformer directly from the preamp through the signal wires, haven't thought about that - I would propably rather go in the direction of a "stronger" input buffer instead.

I do have Tombos input buffer PCBs in the drawer to try.

So many things to try 😁 but first music

 

[Dan K]

Maybe try 2,2V bias on the LUs.

Tombo is the man to advise on going direct or using a buffer.