diff --git a/src/modules/Si443x/Si4430.h b/src/modules/Si443x/Si4430.h
index cb1b2be0..5a9b72d3 100644
--- a/src/modules/Si443x/Si4430.h
+++ b/src/modules/Si443x/Si4430.h
@@ -44,7 +44,7 @@ class Si4430: public Si4432 {
 
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
+    int16_t begin(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
 
     // configuration methods
 
diff --git a/src/modules/Si443x/Si4431.h b/src/modules/Si443x/Si4431.h
index b1495d8a..5cf6e770 100644
--- a/src/modules/Si443x/Si4431.h
+++ b/src/modules/Si443x/Si4431.h
@@ -44,7 +44,7 @@ class Si4431: public Si4432 {
 
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
+    int16_t begin(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
 
     // configuration methods
 
diff --git a/src/modules/Si443x/Si4432.h b/src/modules/Si443x/Si4432.h
index bb8a8b01..2c38b36d 100644
--- a/src/modules/Si443x/Si4432.h
+++ b/src/modules/Si443x/Si4432.h
@@ -44,7 +44,7 @@ class Si4432: public Si443x {
 
       \returns \ref status_codes
     */
-    int16_t begin(float freq = 434.0, float br = 48.0, float freqDev = 50.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
+    int16_t begin(float freq = 434.0, float br = 4.8, float freqDev = 5.0, float rxBw = 181.1, int8_t power = 10, uint8_t preambleLen = 16);
 
     // configuration methods