diff --git a/system/hardware/base.h b/system/hardware/base.h
index baf0f3c3da..df9700a017 100644
--- a/system/hardware/base.h
+++ b/system/hardware/base.h
@@ -10,9 +10,6 @@
 // no-op base hw class
 class HardwareNone {
 public:
-  static constexpr float MAX_VOLUME = 0.7;
-  static constexpr float MIN_VOLUME = 0.2;
-
   static std::string get_os_version() { return ""; }
   static std::string get_name() { return ""; }
   static cereal::InitData::DeviceType get_device_type() { return cereal::InitData::DeviceType::UNKNOWN; }
diff --git a/system/hardware/tici/hardware.h b/system/hardware/tici/hardware.h
index ae1087fa73..ed8a7e7d17 100644
--- a/system/hardware/tici/hardware.h
+++ b/system/hardware/tici/hardware.h
@@ -13,8 +13,6 @@
 
 class HardwareTici : public HardwareNone {
 public:
-  static constexpr float MAX_VOLUME = 0.9;
-  static constexpr float MIN_VOLUME = 0.1;
   static bool TICI() { return true; }
   static bool AGNOS() { return true; }
   static std::string get_os_version() {