I think there may be a little need to enhance the language used here
Mic pre-amp
Guitar Pre-amp
and I think most would agree that a guitar into a DI then a Mic-pre can be ordinary and only useful in a few situations
but
A bass guitar into the same as above can often be very useful.
there are various devices used in recording all types of guitar music
some are interchangeable and some are not
I generally do prefer to use guitar , guitar amp and mic or multiple mics,
were possible.
Sometimes there is good reason to record (noiseless or direct)
guitar amp into a dummy load with DI output
guitar amp into a dummy load with speaker simulator and DI output
guitar pre-amp into a standard DI
guitar pre-amp into a specialised speaker simulator DI
standard instrument DI into a Mic-pre
and other more specialised ways that may include Pod styled or DSP based gear
there are all different and guitar itself is also a big influence on the final result as is the style of music
BUT
as a direct answer to the topic for ... the for the therecordingart
this pdf has a number of very basic dummy load options using simple 50W power resistors.
Where would I hook up an output jack to go to a cab sim? How can I match the impedance of a mic pre?
It probably needs to be parallelled with the dummy load input jack ... this will be at speaker levels
so this could be a problem
which
cab sim are you wanting to use ?
Matching the impedance of a mic pre may be the least of your problems
but as long as the output can handle a 500 to 1K load without changing too much AND the levels aren't extra high as could be with the above
... it should be easy to rig something
just to us help , paint the picture
which guitar ?
which amp ?
which cab sim ?
and before people jump on me and say Kev is being stupid
let me give a really stupid answer to my questions
Nylon String Guitar with DIY piezo pickup.
The biggest tubed lead head you can think off.
Tom S styled Rocktron line level cab sim.
:roll:
I 'spose I can think of a way of wiring that up with the above Aiken dummy load.