diff --git a/lib_com/options.h b/lib_com/options.h
index f26dd18347be01aa3be7de3a7187b80bdafc7444..c98dce78ecfbead8832d7dec4d6fbcbce284b257 100644
--- a/lib_com/options.h
+++ b/lib_com/options.h
@@ -146,6 +146,8 @@
 #define FIX_587_DEFAULT_REVERB                          /* Philips: issue 587: inconsistent default reverb parameters across renderers */
 #define NONBE_FIX_1097_SBA_DTX_BRATE_SWITCHING_ENC      /* FhG: fix out-of-bound errors when switching from SID frame to active frame*/
 #define NONBE_FIX_1052_SBA_EXT_FIX                      /* VA: SBA external output support fix - do not overwrite "output_config" parameter */
+
+#define FIX_1129_EXT_REND_OUTPUT_HIGH                   /* Philips: issue 1129: External renderer BINAURAL_ROOM_REVERB format output level too high compared to internal rendering output */
 #define NONBE_1289_STEREO_SW_TO_MONO                    /* VA: issue 1289: Fix glitch when stereo signal is decoded to mono n TD->DFT switching */
 #define NONBE_FIX_1196_TD_HEADTRACKING_INTERPOLATION    /* Ericsson: Issue 1196, Always apply filter interpolation for each subframe */
 #define NONBE_FIX_1110_STEREO_DTX_BRATE_SWITCHING       /* VA: issue 1110: fix encoder crash in the stereo DTX bitrate switching condition */
diff --git a/lib_rend/lib_rend_fx.c b/lib_rend/lib_rend_fx.c
index 9f23458906f3c6342cffda6adcc197da98b4911e..228e6cfee6eb1badb2094e061c86b6433199a1dd 100644
--- a/lib_rend/lib_rend_fx.c
+++ b/lib_rend/lib_rend_fx.c
@@ -3038,6 +3038,9 @@ static ivas_error updateSbaPanGains(
                     break;
                 }
                 case IVAS_AUDIO_CONFIG_BINAURAL:
+#ifdef FIX_1129_EXT_REND_OUTPUT_HIGH
+                case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_REVERB:
+#endif
                 {
                     if ( hRendCfg->split_rend_config.rendererSelection == ISAR_SPLIT_REND_RENDERER_SELECTION_FASTCONV )
                     {
@@ -3056,7 +3059,9 @@ static ivas_error updateSbaPanGains(
                 }
                     BREAK;
                 case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_IR:
+#ifndef FIX_1129_EXT_REND_OUTPUT_HIGH
                 case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_REVERB:
+#endif
                     IF( NE_32( ( error = initSbaPanGainsForMcOut( inputSba, IVAS_AUDIO_CONFIG_7_1_4, NULL ) ), IVAS_ERR_OK ) )
                     {
                         return error;
@@ -8071,11 +8076,19 @@ static ivas_error renderInputSba(
                 case IVAS_AUDIO_CONFIG_BINAURAL_SPLIT_PCM:
                     error = renderSbaToSplitBinaural( sbaInput, outConfig, outAudio );
                     break;
+#ifdef FIX_1129_EXT_REND_OUTPUT_HIGH
+                case IVAS_AUDIO_CONFIG_BINAURAL:
+                case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_REVERB:
+                    error = renderSbaToBinaural( sbaInput, outConfig, outAudio );
+                    break;
+                case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_IR:
+#else
                 case IVAS_AUDIO_CONFIG_BINAURAL:
                     error = renderSbaToBinaural( sbaInput, outConfig, outAudio );
                     BREAK;
                 case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_IR:
                 case IVAS_AUDIO_CONFIG_BINAURAL_ROOM_REVERB:
+#endif
                     error = renderSbaToBinauralRoom( sbaInput, outConfig, outAudio );
                     BREAK;
                 default: