Custom Posts Per Page in Template

I’m hoping this is a simple response, I’m just not familiar with how the plugin is querying the posts (custom taxonomy?)

How can I add a ‘posts_per_page=10’ to the ‘archive-podcast.php’ so the archive page will show the latest 10 podcasts?

Here is the loop as I have it now:

<?php if ( have_posts() ) : ?>
    <?php $feed_link = get_post_type_archive_feed_link( 'podcast' );?>
     <header>
        <h1 class="page-title" itemprop="headline"><?php _e( 'Sermons' , 'ss-podcasting' ); ?></h1>
     </header>
     <section>
          <?php while (have_posts()) : the_post();?>
          <?php $terms = wp_get_post_terms( get_the_ID() , 'series' );
		foreach( $terms as $term ) {
			$series_id = $term->term_id;
			$series = $term->name;
			break;
			}
	   ?>
	   <article class="podcast_episode">
                <h3><time class="updated" datetime="<?php echo the_time('Y-m-j'); ?>" pubdate><?php the_time('F jS, Y'); ?></time> - <img src="<?php bloginfo('template_directory');?>/icons/microphone.png" width="26" height="23" alt="Sermon">
		<a href="<?php the_permalink(); ?>" title="<?php the_title(); ?>"><?php the_title(); ?></a>
		<div class="podcast_meta"><?php echo $series; ?><aside></div>
		</h3>
	     </article>
             <?php endwhile; ?>
	</section>
<?php endif; ?>

Thanks in advance for any help you can give.

https://www.ads-software.com/extend/plugins/seriously-simple-podcasting/