diff --git a/lignumis/prototypes/content/deep-miner.lua b/lignumis/prototypes/content/deep-miner.lua
index 136d0af..5a1ed99 100644
--- a/lignumis/prototypes/content/deep-miner.lua
+++ b/lignumis/prototypes/content/deep-miner.lua
@@ -64,7 +64,7 @@ data:extend({
             emissions_per_minute = { noise = 2000 }
         },
         energy_usage = "25MW",
-        perceived_performance = { minimum = 0.25, performance_to_activity_rate = 2.0, maximum = 20 },
+        perceived_performance = { minimum = 0.25, performance_to_activity_rate = 0.25, maximum = 2 },
         graphics_set = {
             animation = {
                 layers = {
@@ -121,15 +121,15 @@ data:extend({
         close_sound = sounds.drill_close,
         working_sound = {
             main_sounds = {
-                sound = { filename = "__space-age__/sound/entity/big-mining-drill/big-mining-drill-working-loop.ogg", volume = 0.4, audible_distance_modifier = 0.6 },
-                sound = { filename = "__space-age__/sound/entity/big-mining-drill/big-mining-drill-loop.ogg", volume = 0.6, audible_distance_modifier = 1 },
+                sound = { filename = "__space-age__/sound/entity/big-mining-drill/big-mining-drill-working-loop.ogg", volume = 0.3, audible_distance_modifier = 0.6 },
+                sound = { filename = "__space-age__/sound/entity/big-mining-drill/big-mining-drill-loop.ogg", volume = 0.4, audible_distance_modifier = 1 },
                 fade_in_ticks = 4,
                 fade_out_ticks = 30
             },
             sound_accents = {
-                { sound = { filename = Lignumis.sound .. "entity/deep-miner/deep-miner-drop.ogg", volume = 1, audible_distance_modifier = 10 }, frame = 15 },
+                { sound = { filename = Lignumis.sound .. "entity/deep-miner/deep-miner-drop.ogg", volume = 2, audible_distance_modifier = 10 }, frame = 16 },
             },
-            max_sounds_per_prototype = 3
+            max_sounds_per_prototype = 4
         }
     },
     {