diff --git a/src/mame/drivers/konamim2.cpp b/src/mame/drivers/konamim2.cpp
index 21a04d585da..15a439fc64c 100644
--- a/src/mame/drivers/konamim2.cpp
+++ b/src/mame/drivers/konamim2.cpp
@@ -1121,8 +1121,8 @@ INPUT_PORTS_END
 
 void konamim2_state::cr589_config(device_t *device)
 {
-	device->subdevice<cdda_device>("cdda")->add_route(0, ":lspeaker", 0.5);
-	device->subdevice<cdda_device>("cdda")->add_route(1, ":rspeaker", 0.5);
+	device->subdevice<cdda_device>("cdda")->add_route(0, ":lspeaker", 1.0);
+	device->subdevice<cdda_device>("cdda")->add_route(1, ":rspeaker", 1.0);
 	device = device->subdevice("cdda");
 }
 
@@ -1213,9 +1213,10 @@ void konamim2_state::set_arcres(machine_config &config)
 
 void konamim2_state::add_ymz280b(machine_config &config)
 {
+    // TODO: The YMZ280B outputs are actually routed to a speaker in each gun
 	YMZ280B(config, m_ymz280b, XTAL(16'934'400));
-	m_ymz280b->add_route(0, "lspeaker", 1.0);
-	m_ymz280b->add_route(1, "rspeaker", 1.0);
+	m_ymz280b->add_route(0, "lspeaker", 0.5);
+	m_ymz280b->add_route(1, "rspeaker", 0.5);
 }
 
 void konamim2_state::add_mt48t58(machine_config &config)