diff --git a/mainwindow.ui b/mainwindow.ui
index 712b685e4..4e9ebc03c 100644
--- a/mainwindow.ui
+++ b/mainwindow.ui
@@ -1257,7 +1257,7 @@
            <string>Adjust Tx audio level</string>
           </property>
           <property name="maximum">
-           <number>300</number>
+           <number>450</number>
           </property>
           <property name="value">
            <number>0</number>
diff --git a/soundout.cpp b/soundout.cpp
index c0ac8ed61..d79929525 100644
--- a/soundout.cpp
+++ b/soundout.cpp
@@ -140,7 +140,7 @@ void SoundOutput::stop ()
 
 qreal SoundOutput::attenuation () const
 {
-  return -(10. * qLn (m_volume) / qLn (10.));
+  return -(20. * qLn (m_volume) / qLn (10.));
 }
 
 void SoundOutput::setAttenuation (qreal a)