This isn't exactly what you need but check out SPL monitor products. :

here is your dream come true:
http://recording.org/entries/29-Headphone-Amp-Distribution-System

thanks, I already found this but by the sound of it that's not what I'm after...that seems to be a way for one musician to control a mix in one set of cans remotely, not for 4 musicians to each hear a separate, pre-mixed send :)

Your right its not really what you want, it has a bit more to it.... But you can do what I do and Have 5 or 6 of them, one for each member of the band to make there own custom mix. IT provides more ME for everyone....
What you want sounds like Samson Q5 its only half a rack though... but cheap. ;)

nah found that one as well...that one doesn't even have aux in for each channel...all 5 outputs are the same mix :)

Try this one - maybe everything you asked for minus the separate L/R inputs per channel.

[[url=http://[/URL]="http://www.artproau…"]ART 806[/]="http://www.artproau…"]ART 806[/]

aha, yep that's more like it! double points to anyone who can get the seperate L/R inputs :)

bushy, post: 343831 wrote:
What I want is:

[[url=http://[/URL]="http://www.thomann…"]Millenium HP4 for €59,-[/]="http://www.thomann…"]Millenium HP4 for €59,-[/]
4 channel headphone amp: CHECK
rackmountable: CHECK
each channel with its own stereo input: CHECK
This would be better as a 2x mono than a single TRS, as otherwise I have to make up 4 Y cables: CHECK
I also want this input to be on the BACK of the amp: CHECK
Does anyone know of such an amp? Yes, I have it in my rack (OK, now it's on my desk but tomorrow it's in my rack, I promise)

I have a Samson Q5 and a Presonus HP4, neither are directly rack mountable. It sounds more like you want/need four single headphone preamps than one four channel preamp. Perhaps a gaggle of those bithead / airhead things.

[[url=http://[/URL]="http://www.headphon…"]Amplifiers [/]="http://www.headphon…"]Amplifiers [/]

RiF, post: 345560 wrote: [[url=http://[/URL]="http://www.thomann…"]Millenium HP4 for €59,-[/]="http://www.thomann…"]Millenium HP4 for €59,-[/]
4 channel headphone amp: CHECK
rackmountable: CHECK
each channel with its own stereo input: CHECK
This would be better as a 2x mono than a single TRS, as otherwise I have to make up 4 Y cables: CHECK
I also want this input to be on the BACK of the amp: CHECK
Does anyone know of such an amp? Yes, I have it in my rack (OK, now it's on my desk but tomorrow it's in my rack, I promise)

perfect! thanks heaps, ive never heard of millenium before...now to find their australian distributor :)

bushy, post: 345614 wrote: perfect! thanks heaps, ive never heard of millenium before...now to find their australian distributor :)

Getting the Millenium in AUS could be a challenge. I never saw those outside the Thomann shop. So here are some options:
1. Order the Millenium in Germany at Thomann and pay around € 50 extra shipping cost (resulting in around 144 AUS$ total, excluding anx taxes or duty or whatnot).
2. Check out the Samson S-Phone. Costs twice as much, much seems to meet your requirements as well.
3. Find the australian distributor...

you're right...there's precious little on these anywhere, i haven't even been able to find a review on them. I'll check out the samson as well.
Thanks!

[[url=http://[/URL]="http://www.guitar.c…"]Phonic A6300 Headphone Amplifier[/]="http://www.guitar.c…"]Phonic A6300 Headphone Amplifier[/]

Check out the Furman headphone amps. I have the HA-6AB (not what you want), but I think their upgraded models might.

[[url=http://[/URL]="http://www.furmanso…"]FurmanSound.com[/]="http://www.furmanso…"]FurmanSound.com[/]

See the HDS-16 or HRM-16.

This may be too late for you, but look at Rane headphone amps.

I currently run the 26 I/O in my studio, in conjunction w/ a Rane 6-ch amp this way:

Set up the mixes in the control console mix tabs.
Actual routing -
Mono out 1 - Rane Ch 1
Mono out 3 - Rane Ch 2

and so on...

This will only give you four separate mixes (as the analog outs are stereo pairs from the mix console), but should do what you want.
Now that I think of it, there may be a way to use the matrix router to send up to 8 mono signals out.

I think this is more in line with what you're looking for. Apparently a new cheapie from China but it's the first unit I've seen with a very straightforward design. Plus; they have a nice little demonstration video you can watch.

OSP HPA-400
Headphone Distribution Amplifier

[[url=http://[/URL]="http://cgi.ebay.com…"]OSP HPA-400 Headphone Distribution Amplifier - eBay (item 370244889531 end time Jul-09-10 10:04:59 PDT)[/]="http://cgi.ebay.com…"]OSP HPA-400 Headphone Distribution Amplifier - eBay (item 370244889531 end time Jul-09-10 10:04:59 PDT)[/]