small amp questions

[flibbergibbin]

I'm building a small amp and was wondering a few things. Okay, first off is there a way to add some kind of bypass jack to disengage the speakers so that the amp can be used as a pedal? Secondly, I'm wanting to run the amp at 18 volts but I think it's going to be 9v because I'd like to add a 9v adapter jack. What kind of losses in sound will be apparent with this voltage drop?  I read it is possible to convert a 9 volt to 18 with the MAX1044 and was wondering is the MAX1044A at Small Bear the same? Finally, what would prevent, if anything, the use of pedals with a little amp? Thanks in advance.

[flibbergibbin]

Sorry don't mean to be a pain but as I mentioned in the thread on op amps I'm going to the electronics store tomorrow. If someone could tell me if there is a bypass jack of some sort to switch off speakers and allow another quarter inch cable to run into it to act as an output jack (to act as a pedal instead of an amp)  I would greatly appreciate it. Really, really, really, really appreciate it. Thanks again. 

[vfr800fiman]

The search function is your friend.
http://www.elixant.com/~stompbox/smfforum/index.php?topic=31495.0
I build this ruby with a headphone jack (or speaker) that cuts-off
the main speaker when plugged-in. This is just a 1/4" jack that
is switched. Mr. Tremblay helped me with the schematic, take a look
at the post.

I can't help you with the 18v question though, sorry.

Glenn

[flibbergibbin]

Thanks the information it's much appreciated. And yes the search function is quite useful I spend a considerable amount of time searching and reading and reading and reading. I tried searching a couple of different things but wasn't positive to even what I was needing. So, I went with speaker bypass jack and well I must have missed your post. I do appreciate your help most certainly and please don't confuse my explanation on the search function with any sarcastic ill will. Thanks.