diff --git a/esphome/components/mixer/speaker/__init__.py b/esphome/components/mixer/speaker/__init__.py
index a3746c019a0..26619f35a76 100644
--- a/esphome/components/mixer/speaker/__init__.py
+++ b/esphome/components/mixer/speaker/__init__.py
@@ -155,7 +155,7 @@ async def to_code(config: ConfigType) -> None:
         {
             cv.GenerateID(): cv.use_id(SourceSpeaker),
             cv.Required(CONF_DECIBEL_REDUCTION): cv.templatable(
-                cv.int_range(min=0, max=51)
+                cv.int_range(min=0, max=255)
             ),
             cv.Optional(CONF_DURATION, default="0.0s"): cv.templatable(
                 cv.positive_time_period_milliseconds
diff --git a/tests/components/mixer/common.yaml b/tests/components/mixer/common.yaml
index 55e96df4c27..489475c794f 100644
--- a/tests/components/mixer/common.yaml
+++ b/tests/components/mixer/common.yaml
@@ -3,7 +3,7 @@ esphome:
     then:
       - mixer_speaker.apply_ducking:
           id: source_speaker_1_id
-          decibel_reduction: 10
+          decibel_reduction: 255
           duration: 1s
 
 speaker: