diff --git a/driver/bk4819.c b/driver/bk4819.c
index 2bdf4f1..b102b29 100644
--- a/driver/bk4819.c
+++ b/driver/bk4819.c
@@ -136,6 +136,41 @@ void BK4819_Init(void)
 	BK4819_write_reg(0x4B, 0x7102);  // AF gains
 	BK4819_write_reg(0x26, 0x13A0);  // ???
 #endif
+
+	#if 0
+	{
+		const uint16_t reg = BK4819_read_reg(0x2B);
+		BK4819_write_reg(0x2B, reg | (1u <<  9));               // disable RX LPF
+		//BK4819_write_reg(0x2B, reg | (1u << 10));               // disable RX HPF
+		//BK4819_write_reg(0x2B, reg | (1u << 10) | (1u << 9));   // disable RX LPF & HPF
+	
+		// RX 300Hz LPF
+		//BK4819_write_reg(0x54, 0x935A);  // -3dB
+		//BK4819_write_reg(0x55, 0x2EFF);  //
+		//BK4819_write_reg(0x54, 0x920B);  // -2dB
+		//BK4819_write_reg(0x55, 0x3010);  //
+		//BK4819_write_reg(0x54, 0x91c1);  // -1dB
+		//BK4819_write_reg(0x55, 0x3040);  //
+		//BK4819_write_reg(0x54, 0x9009);  //  0dB default
+		//BK4819_write_reg(0x55, 0x31A9);  //
+		//BK4819_write_reg(0x54, 0x8F90);  // +1dB
+		//BK4819_write_reg(0x55, 0x31F3);  //
+		//BK4819_write_reg(0x54, 0x8F46);  // +2dB
+		//BK4819_write_reg(0x55, 0x31E7);  //
+		//BK4819_write_reg(0x54, 0x8ED8);  // +3dB
+		//BK4819_write_reg(0x55, 0x3232);  //
+		BK4819_write_reg(0x54, 0x8D8F);  // +4dB
+		BK4819_write_reg(0x55, 0x3359);  //
+	
+		// TX 3kHz HPF
+		//BK4819_write_reg(0x75, 64002);  // -1dB
+		//BK4819_write_reg(0x75, 62731);  //  0dB default
+		//BK4819_write_reg(0x75, 58908);  // +1dB
+		//BK4819_write_reg(0x75, 57122);  // +2dB
+		//BK4819_write_reg(0x75, 54317);  // +3dB
+		BK4819_write_reg(0x75, 52277);  // +4dB
+	}
+	#endif
 }
 
 static uint16_t BK4819_read_16(void)
diff --git a/firmware.bin b/firmware.bin
index be57efc..04948af 100644
Binary files a/firmware.bin and b/firmware.bin differ
diff --git a/firmware.packed.bin b/firmware.packed.bin
index 5319b52..917b05f 100644
Binary files a/firmware.packed.bin and b/firmware.packed.bin differ
diff --git a/settings.h b/settings.h
index 7af0a71..1776a91 100644
--- a/settings.h
+++ b/settings.h
@@ -25,12 +25,12 @@
 #include "frequencies.h"
 
 enum {
-	FM_DEV_LIMIT_LOWER_NARROW   =  950,
-	FM_DEV_LIMIT_DEFAULT_NARROW = 1200,
+	FM_DEV_LIMIT_LOWER_NARROW   = 1000,
+	FM_DEV_LIMIT_DEFAULT_NARROW = 1350,
 	FM_DEV_LIMIT_UPPER_NARROW   = 1600,
 
-	FM_DEV_LIMIT_LOWER_WIDE     =  950,
-	FM_DEV_LIMIT_DEFAULT_WIDE   = 1300,
+	FM_DEV_LIMIT_LOWER_WIDE     = 1000,
+	FM_DEV_LIMIT_DEFAULT_WIDE   = 1350,
 	FM_DEV_LIMIT_UPPER_WIDE     = 1600
 };