diff --git a/src/mame/drivers/powerins.c b/src/mame/drivers/powerins.c
index cb934f5dfc8..18d0c623ce8 100644
--- a/src/mame/drivers/powerins.c
+++ b/src/mame/drivers/powerins.c
@@ -379,15 +379,15 @@ static MACHINE_DRIVER_START( powerins )
 
 	MDRV_SOUND_ADD("oki1", OKIM6295, 4000000)
 	MDRV_SOUND_CONFIG(okim6295_interface_pin7low)
-	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.15)
 
 	MDRV_SOUND_ADD("oki2", OKIM6295, 4000000)
 	MDRV_SOUND_CONFIG(okim6295_interface_pin7low)
-	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.15)
 
 	MDRV_SOUND_ADD("ym2203", YM2203, 12000000 / 8)
 	MDRV_SOUND_CONFIG(ym2203_config)
-	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.5)
+	MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 2.0)
 MACHINE_DRIVER_END
 
 static MACHINE_DRIVER_START( powerina )