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The problem is in this part of your .htaccess file:

RewriteCond %{HTTP_HOST} ^drumbofair\.com$ [OR]
RewriteCond %{HTTP_HOST} ^www\.drumbofair\.com$
RewriteRule ^/?$ "https\:\/\/www\.drumbofair\.com\/jdas4" [R=301,L]

This redirects everything with a rewrite engine relative URL path of / (or empty) to https://www.drumbofair.com/jdas4.

When you have a site in a subdirectory, the .htaccess file (even the one that ships with Joomla; using Admin Tools is irrelevant) needs a RewriteBase for that directory so that all URL rewriting is done relative to the site's root, i.e. you have this line:

RewriteBase /jdas4

Note that if you only have this line and nothing else in our jdas4/.htaccess file you will get the infinite redirection. Why? Because Apache cascades .htaccess file over filesystem directories. It merges the two .htaccess files so your redirection block above is triggered because the path /jdas4 parsed relative to the path /jdas4 is, of course, blank which means that your rule for catching blank paths is triggered. Therefore, you get an infinite redirection loop since /jdas4 redirects back to /jdar4 over and over again.

To prevent that, you need to change your RewriteRule line to:

RewriteRule ^/?$ "https://www.drumbofair.com/jdas4/index.php" [R=301,L]

Also remember to DISABLE "redirect index.php to site's root" in the .htaccess Maker.

This works because the empty path redirect to Joomla's index.php file which, most notably, is NOT an empty path when parsed relative to /jdas4! Therefore, you only get one redirection, breaking the infinite loop.