Where = limited results

Hi

I'm struggling with what I thought was going to be an easy "where = product" type scenario, but it's not coming together. I just want the page to limit the results to the amplifer category (which has a dozen or so subcategories), but get the message of "MySQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ') AND product_sub_categories.hidden = 0 ORDER BY dragSortOrder DESC' at line 3".

My code is:

<?php header('Content-type: text/html; charset=utf-8'); ?>
<?php


// load viewer library
$libraryPath = 'cmsAdmin/lib/viewer_functions.php';
$dirsToCheck = array('/clientdata/zeus-dynamic-1/a/u/audiomarketing.com.au/www/','','../','../../','../../../');
foreach ($dirsToCheck as $dir) { if (@include_once("$dir$libraryPath")) { break; }}
if (!function_exists('getRecords')) { die("Couldn't load viewer library, check filepath in sourcecode."); }

// load records
list($product_sub_categoriesRecords, $product_sub_categoriesMetaData) = getRecords(array(
'tableName' => 'product_sub_categories',
'where' => ' content="Amplifiers", ',
));



Note: the content field is generated from a multi list record where content = a specific group of products, and for example, amplifiers is record 1.

I haven't seen this error message previously, so am terribly confused! Help pls.