diff --git a/src/mame/drivers/bbusters.c b/src/mame/drivers/bbusters.c
index cf0e2ddd47b..df6eec1ec5e 100644
--- a/src/mame/drivers/bbusters.c
+++ b/src/mame/drivers/bbusters.c
@@ -728,8 +728,8 @@ static MACHINE_DRIVER_START( bbusters )
 
 	MDRV_SOUND_ADD("ym", YM2610, 8000000)
 	MDRV_SOUND_CONFIG(ym2610_config)
-	MDRV_SOUND_ROUTE(0, "left",  3.0)
-	MDRV_SOUND_ROUTE(0, "right", 3.0)
+	MDRV_SOUND_ROUTE(0, "left",  1.0)
+	MDRV_SOUND_ROUTE(0, "right", 1.0)
 	MDRV_SOUND_ROUTE(1, "left",  1.0)
 	MDRV_SOUND_ROUTE(2, "right", 1.0)
 MACHINE_DRIVER_END