This plugin allows to configure the number of posts displayed for every custom post registered.
Simple Custom Posts per Page (SCPP) allows to configure the number of posts displayed for every custom post registered in WordPress.
See Screenshots to known why it is called "Simple".
In your Readme page in Setting tab of WordPress, it adds an option for every post type.
Disable Plugin in Template: You can disable plugin filters in your template whenever you want. Maybe you need a query with a different number of custom posts per page for a specific post type. Using this code before your query, the filter plugin will be disabled for a specific post type:
<?php $GLOBALS['ado_cspp_disable']="YOUR_TYPE"; ?>
With this code, you can use your personalized query for your loop.
More: You can find more informations in the official Post on my Blog.