\listfiles
\documentclass[paper=b6,fontsize=11pt,twoside]{scrartcl}
\usepackage{showframe}

\newcommand*\aPage{%
  \Huge
  \noindent A \hfill B \hfill C 
  \vfill
  \noindent X \hfill Y \hfill Z \newpage}

\usepackage{blowup}
\blowUp{target=a4,pos={inside,top},noscale}

\begin{document}

\aPage
\aPage
\aPage
\aPage

\end{document}
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