linking two 8pre's together

[caryd]

So I bought another 8pre today. My Mac only gives me the choice to use "8pre #1" OR "8pre #2". How do I chain the two units together so the Mac sees them as one expanded unit? (My Mac is an iMac5,1 and I'm running Leopard). I ran a secondary firewire cable from one 8pre into the other, and I also tried plugging both firewire cables directly into the Mac, no change. Should I try the optical ins and outs instead? Please help this Newbie out! Thanks, all.

[fazmanicg]

A) If using (2) Firewire Cables, You have to create an Aggregate device.

B) Use the Opticals. Iam pretty sure this is possible with 2 8 pres

I have an 828MK3 and an 8Pre. I connect the 2 via optical. It works great

[caryd]

Thanks for the advice! I was pretty sure the opticals would do the trick - but I needed someone else to also think that, too - ha! It works great, but here's a mystery (to me) I have channels 1 thru 8 available, and 11 thru 18 - more than enough. But what happened to channels 9 &10? Thanks again!

[fazmanicg]

In my set up, Ch 9 & 10 are the main outs. I changed mine in the Motu Audio/Midid Preferences. Go to your MOTU Audio/MIDI settings ....

Check out this thread for more info. It has to do with the 828MK3, but the same could apply to you as well.

http://www.logicprohelp.com/viewtopic.php?t=25860

[INMT]

I have two 8 pres, use a "lightpipe/ADAT cable" out from your #1 to an in on your #2. It will show as one unit with "16"inputs. I have used it this way for a couple of years, no problems what so ever.
Just remember inputs "9 and 10" are a stereo mix of the first 8 inputs.
Your xlr inputs will be 1-8 then 11-18.
Use the outputs and or headphone out on 8 Pre #1 as it has all 16 inputs going to it.