Use SPDIF. You don't lose quality from converting from Analog to Digital, and it's a cleaner sound. Only bad thing is, you're stuck at 44.1khz, but it's not a bad tradeoff IMHO. Hopefully the next gen Kemper can go higher.
IMHO 44.1 kHz is fine, the only problem is the Master sync only... No slave option 
My opinion is it depends on the gear you have. If you have awesome converters and analog out board gear then the master outs make sense. Otherwise, I think the SPDIF makes sense. I like to pass it through a CAPI Missing Link (line level transformer goodness) and a compressor (atm a chandler little devil) as thats, more or less, how I recorded amps in my studio. I compared that to the SPDIF and preferred it with some analog magic. I don't think either method is a compromise. YMMV
Now go and register it on Focusrite, you'll get some $400 worth of plugins for free with it!
Cool man! Good for us Saffire owners too!
SPDIF represents the the true sound of the Kemper
Thanks for bringing this up!
I registerred last October but didn't know about this download. Cool!
It sounds better especially the top end in my listening tests but I never record at 44.1k. Too bad....
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only 44khz and no slave option is in fact a problem for many.
Yes, I can say ok, from now on i record with 44khz with kemper as master. at home.
But being in studio and telling a tech who always uses 48khz he should record everything in 44khz, cause thats what my kemper wants...
nop.
But.
As far as i know this is a hardware issue. If thats the case no firmwareupdate will change this.
So I say hey, thats it, i use analog out when tech wants 48khz.
If an update could realy help, it would be great if kemper would do this.
"True sound"—not sure what that means beyond laboratory tests. No way all the session pros cutting with their Kempers are forcing producers to slave big multitrack production time clocks to their guitar amps. Spdif is cool but Kemper's analog outs sound great.
I like using the analog outs.
Play the part. Done 
Next track!
Display Moreonly 44khz and no slave option is in fact a problem for many.
Yes, I can say ok, from now on i record with 44khz with kemper as master. at home.
But being in studio and telling a tech who always uses 48khz he should record everything in 44khz, cause thats what my kemper wants...
nop.
But.
As far as i know this is a hardware issue. If thats the case no firmwareupdate will change this.
So I say hey, thats it, i use analog out when tech wants 48khz.
If an update could realy help, it would be great if kemper would do this.
Update for 48kHz is possible - but i don't think it will happened,
for slave option is not possible due the hardware limit.
[quote='BobbyKa','http://www.kemper-amps.com/forum/index.php/Thread/18226-To-SPDIF-or-not-to-SPDIF/?postID=196826&#post196826']
Update for 48kHz is possible - but i don't think it will happened,
for slave option is not possible due the hardware limit.
ok.
if so, i guess they think its to much afford for too less benefit making the 48khz option.
lets see, i would think it would be great if they would do it.
ok.
if so, i guess they think its to much afford for too less benefit making the 48khz option.
lets see, i would think it would be great if they would do it.
I dont think "too much afford" is a problem - every filter coefficient in fx and amp simulations depends on Fs (sample rate) - you have to calculate tis coeff. . You have to store this coeff. This is the problem. The option for 48kHz is now accesibble by hidden menu feature - but every rig from RE is sounds different because they where sampled and calculated at 44.1 kHz.
There are other factors I think like more memory and DSP usage for loop and pitch shifters, reverbs and delays , choruses, etc.
