diff --git a/src/gui/presets.cpp b/src/gui/presets.cpp
index 1262b453..12b77ceb 100644
--- a/src/gui/presets.cpp
+++ b/src/gui/presets.cpp
@@ -822,10 +822,15 @@ void FurnaceGUI::initSystemPresets() {
     }
   );
   ENTRY(
-    "ZX Spectrum (48K)", {
+    "ZX Spectrum (48K, SFX-like engine)", {
       CH(DIV_SYSTEM_SFX_BEEPER, 1.0f, 0, "")
     }
   );
+  ENTRY(
+    "ZX Spectrum (48K, QuadTone engine)", {
+      CH(DIV_SYSTEM_SFX_BEEPER_QUADTONE, 1.0f, 0, "")
+    }
+  );
   ENTRY(
     "ZX Spectrum (128K)", {
       CH(DIV_SYSTEM_AY8910, 1.0f, 0, "clockSel=1") //beeper was also included
@@ -2594,10 +2599,15 @@ void FurnaceGUI::initSystemPresets() {
     }
   );
   ENTRY(
-    "ZX Spectrum (beeper only)", {
+    "ZX Spectrum (beeper only, SFX-like engine)", {
       CH(DIV_SYSTEM_SFX_BEEPER, 1.0f, 0, "")
     }
   );
+  ENTRY(
+    "ZX Spectrum (beeper only, QuadTone engine)", {
+      CH(DIV_SYSTEM_SFX_BEEPER_QUADTONE, 1.0f, 0, "")
+    }
+  );
   ENTRY(
     "Sharp SM8521", {
       CH(DIV_SYSTEM_SM8521, 1.0f, 0, "")