Are there any preamps that can work with 2 amps and a sub woofer?

@ernie00 I just bought the CODA 07x and I believe it has all the features you require (have not received the unit yet). It definitely can support 2 amps and I am considering getting a second amp. With regards to subwoofer, there is a RCA L/R output that I imagine can be used with a sub. I never used a sub so I am not sure. My KRELL dealer said I could use the KRELL’s RCA variable output on my integrated for a sub so the same logic should apply to the CODA.

“Both sets of balanced receptacles on the left side are identical stereo outputs suitable for connection to multiple amplifiers. The two sets of balanced receptacles on the right side are separate input channels.”

Here is the CODA dealers response to me.

If you're looking to biamp, it allows you to send the signal to both amps without the need for a splitter cable (which is what most preamps require and result in a drop in signal).

It can also be used to connect to another amplifier that is powering an entirely separate audio system.

Both sets of XLR outputs are always active. If you'd like to connect a second set of speakers, it is recommended that you power off the amplifier you're not currently listening to, as the amplifier is the device with the power draw.

Some time back I also asked a similar question on this thread.
https://forum.audiogon.com/discussions/preamps-with-dual-xlr-outputs

SST Ambrosia  2 single ended, 2 balanced

PS Audio PCA-2 has four outs: 2 XLR, 2 RCA

xaak

I wondered about tape out volume, it's been a while, thanks for clarifying that.

With pres offering both RCA & XLR outputs there’s a good the output voltage will be different between them, and they may not necessarily be intended to be used simultaneously.