diff --git a/firmware/common/dsp_fir_taps.hpp b/firmware/common/dsp_fir_taps.hpp
index 5df9f515..c6d37660 100644
--- a/firmware/common/dsp_fir_taps.hpp
+++ b/firmware/common/dsp_fir_taps.hpp
@@ -245,12 +245,29 @@ constexpr fir_taps_real<32> taps_6k0_decim_2 {
 		 11815,  10413,   7946,   4978,   2134,    -83,  -1411,  -1857,
 		 -1640,  -1080,   -474,    -21,    208,    247,    178,     95,
 	} },
+}; 
+
+// IFIR prototype filter fs=48000 ; pass=4500 , stop=7800, decim=4, fout=12000
+// For Europe AM commercial  broadcasting stations in LF/MF/HF, Emissions Designator 9K00A3E Bandwidth: 9.00 kHz (derivated from taps_6k0_decim_2 ): 
+// Pre-decimate LPF FIR filter design Created by SciPy Python with the "window method", num_taps = 32, cut_off = 4950. sample_rate = 48000 # Hz, 
+// Created with h = signal.firwin(num_taps, cut_off, nyq=sample_rate/2, window=('chebwin',49)) , achieving good  STOP band plot < -60 dB's with some ripple.
+// post-escaled h taps to avoid decimals , targetting <= similar int values as previous taps_6k0_dsb_channel peak < 32.767 (2 exp 15) and similar H(f)gain
+constexpr fir_taps_real<32> taps_9k0_decim_2 {
+	.low_frequency_normalized  = -4500.0f / 48000.0f,	// Negative -cutt off freq -3dB (real achieved data ,in the plot and measurements)
+	.high_frequency_normalized =  4500.0f / 48000.0f,	// Positive +cutt off freq -3dB (idem) 
+	.transition_normalized     =  3300.0f / 48000.0f,	// 3300 Hz = (7800 Hz - 4500 Hz) (both from plot H(f) curve plot)
+	.taps = { {
+			  -40,     	3,	    98,   239,   340,   266,   -96,  -726,
+			-1391, 	-1659, 	 -1041,   772,  3691,  7156, 10271, 12118,
+			12118, 	10271,	  7156,  3691,   772, -1041, -1659, -1391,
+			 -726,    -96,	   266,   340,   239,    98,     3,   -40 
+	} },
 };
 
 // Channel filter: fs=12000, pass=3000, stop=3300, decim=1, fout=12000
 /* NOTE: Slightly less than 1.0 gain (normalized to 65536) due to max(taps) being
  * slightly larger than 32767 (33312).
- */
+*/ 
 constexpr fir_taps_complex<64> taps_6k0_dsb_channel {
 	.low_frequency_normalized = -3000.0f / 12000.0f,
 	.high_frequency_normalized = 3000.0f / 12000.0f,
@@ -275,6 +292,36 @@ constexpr fir_taps_complex<64> taps_6k0_dsb_channel {
 	} },
 };
 
+// Channel filter: fs=12000, pass=4450, stop=4800, decim=1, fout=12000   (4k45 selected = aprox 4k5, after several iterative plot H(f) test, best trade off curve)
+// For Europe AM commercial broadcasting stations in LF/MF/HF, Emissions Designator 9K00A3E Bandwidth: 9.00 kHz (derivative from  taps_6k0_dsb_channel) 
+// FIR filter design created by SciPy Python with the "window method"; num_taps = 64, cut_off = 4450. sample_rate = 12000 # Hz, 
+// Created with : h=signal.firwin(num_taps, cut_off, nyq=sample_rate/2, window=('chebwin',50)), achieving good STOP band plot  < -60 dB's with some ripple.
+// post-escaled h taps to avoid decimals , targetting <= similar int values as previous taps_6k0_dsb_channel peak < 32.767 (2 exp 15), (29253)  and similar H(f)gain
+constexpr fir_taps_complex<64> taps_9k0_dsb_channel {
+	.low_frequency_normalized  = -4500.0f / 12000.0f,  	// Negative -cutt off freq -3dB (in the H(f) curve plot)
+	.high_frequency_normalized =  4500.0f / 12000.0f,  	// Positive +cutt off freq -3dB (in the H(f) curve plot) 
+	.transition_normalized     =   350.0f / 12000.0f,	// 350Hz = (4800 Hz -4450 Hz)  cut-3dB's (both data comes from H(f) curve plot and confirmed by  measurements )
+	.taps = { {
+		{    -34,      0 }, {     23,      0 }, {    -13,      0 }, {    -19,      0 },
+		{     55,      0 }, {    -65,      0 }, {     25,      0 }, {     59,      0 },
+		{   -137,      0 }, {    141,      0 }, {    -35,      0 }, {   -146,      0 },
+		{    287,      0 }, {   -262,      0 }, {     26,      0 }, {    317,      0 },
+		{   -544,      0 }, {    441,      0 }, {     29,      0 }, {   -638,      0 },
+		{    980,      0 }, {   -707,      0 }, {   -191,      0 }, {   1272,      0 },
+		{  -1805,      0 }, {   1175,      0 }, {    660,      0 }, {  -2934,      0 },
+		{   4214,      0 }, {  -2774,      0 }, {  -3655,      0 }, {  29253,      0 },
+		{  29253,      0 }, {  -3655,      0 }, {  -2774,      0 }, {   4214,      0 },
+		{  -2934,      0 }, {    660,      0 }, {   1175,      0 }, {  -1805,      0 },
+		{   1272,      0 }, {   -191,      0 }, {   -707,      0 }, {    980,      0 },
+		{   -638,      0 }, {     29,      0 }, {    441,      0 }, {   -544,      0 },
+		{    317,      0 }, {     26,      0 }, {   -262,      0 }, {    287,      0 },
+		{   -146,      0 }, {    -35,      0 }, {    141,      0 }, {   -137,      0 },
+		{     59,      0 }, {     25,      0 }, {    -65,      0 }, {     55,      0 },
+		{    -19,      0 }, {    -13,      0 }, {     23,      0 }, {    -34,      0 },
+	} },
+};
+
+
 // USB AM 2K80J3E emission type ///////////////////////////////////////////
 
 // IFIR prototype filter: fs=12000, pass=3000, stop=3300, decim=1, fout=12000