# Change chapter title format in scrreprt without titlesec?

I'm working with scrreprt and I have loaded minitoc to have a short TOC after each chapter title. However when I give the \chapter command I get:

1 Chapter Title

I'd like to have:

Chapter 1

Chapter Title

like in the ordinary report document-class (which I'm not using because I like the page size and fonts of the scrreprt doc-class).

I've seen in this other thread the following piece of code but it requires the titlesec package. I'm not familiar with that package, besides I think I would get errors and warnings on top of what I'm already getting now.

\renewcommand*{\chapterformat}{%
\mbox{\scalebox{1.5}{\chapappifchapterprefix{\nobreakspace}}%
\scalebox{4}{\color{gray}\thechapter\autodot}\enskip}}

You don't need the titlesec package for that. It suffices to add the option chapterprefix=true when loading scrreprt.

\documentclass[a4paper,10pt,chapterprefix=true]{scrreprt}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[italian]{babel}

\usepackage{amssymb, amsmath, amsfonts}
\usepackage{silence}

\WarningFilter{minitoc(hints)}{W0023}
\WarningFilter{minitoc(hints)}{W0028}
\WarningFilter{minitoc(hints)}{W0030}
\WarningFilter{minitoc(hints)}{W0024}

\WarningFilter{blindtext}{} % this takes care of the blindtext messages

\usepackage[math,bible]{blindtext}
%\usepackage{titlesec}
\usepackage{hyperref}
\hypersetup{pdfstartview=FitH}
\usepackage[italian]{cleveref}
\usepackage[italian]{minitoc}

%opening
\title{M.T.N.}
\author{Myself}
\date{}

\begin{document}

\maketitle
\thispagestyle{empty}
\clearpage
\mbox{}
\cleardoublepage

\dominitoc
\tableofcontents
\clearpage
\chapter{Topic One}

\minitoc
\clearpage
\section{First Topic}
\blindmathpaper

\section{Second Topic}
\blindtext

\subsection{Second Topic, first subsection}
\blindtext
\end{document}

this is the result: