Might I humbly suggest that, at least in audio, to try and fail is better than to have never tried at all (ignoring for the moment the effect on your piggy bank). I learn more from my failures than from my successes - my failures tell me what I need to pay attention to next time.

The creative urge within might not be so easily dismissed - you now have a clean slate before you. How long before you sketch something out on it??

If you have access to a public library, you might want to spend a few evenings there looking through old issues of the Journal of the Audio Engineering Society. Back in the 50's and 60's and 70's, they were researching fundamental questions, such as "what really matters most in loudspeaker design?"

The enormous variety in speaker design today reveals that the answer to that question still hasn't been pinned down. Maybe you'll be the one to see the forest without being distracted by the trees.

Duke