diff --git a/src/mame/drivers/armedf.cpp b/src/mame/drivers/armedf.cpp
index 74d46003ede..753e8dd38c4 100644
--- a/src/mame/drivers/armedf.cpp
+++ b/src/mame/drivers/armedf.cpp
@@ -1425,8 +1425,8 @@ void armedf_state::armedf(machine_config &config)
 
 	YM3812(config, "ymsnd", XTAL(24'000'000)/6).add_route(ALL_OUTPUTS, "speaker", 0.5);      // 4mhz
 
-	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.5); // unknown DAC
-	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.5); // unknown DAC
+	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 1.0); // unknown DAC
+	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 1.0); // unknown DAC
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
 	vref.add_route(0, "dac1", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac1", -1.0, DAC_VREF_NEG_INPUT);
 	vref.add_route(0, "dac2", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac2", -1.0, DAC_VREF_NEG_INPUT);
@@ -1470,8 +1470,8 @@ void armedf_state::cclimbr2(machine_config &config)
 
 	YM3812(config, "ymsnd", XTAL(24'000'000)/6).add_route(ALL_OUTPUTS, "speaker", 0.5); // or YM3526?
 
-	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // unknown DAC
-	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // unknown DAC
+	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.8); // unknown DAC
+	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.8); // unknown DAC
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
 	vref.add_route(0, "dac1", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac1", -1.0, DAC_VREF_NEG_INPUT);
 	vref.add_route(0, "dac2", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac2", -1.0, DAC_VREF_NEG_INPUT);
@@ -1509,8 +1509,8 @@ void armedf_state::legion_common(machine_config &config)
 
 	GENERIC_LATCH_8(config, m_soundlatch);
 
-	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // 10-pin SIP with 74HC374P latch
-	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // 10-pin SIP with 74HC374P latch
+	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.8); // 10-pin SIP with 74HC374P latch
+	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.8); // 10-pin SIP with 74HC374P latch
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
 	vref.add_route(0, "dac1", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac1", -1.0, DAC_VREF_NEG_INPUT);
 	vref.add_route(0, "dac2", 1.0, DAC_VREF_POS_INPUT).add_route(0, "dac2", -1.0, DAC_VREF_NEG_INPUT);
diff --git a/src/mame/drivers/galivan.cpp b/src/mame/drivers/galivan.cpp
index 9a1cdbcf6f4..52441b3fa7b 100644
--- a/src/mame/drivers/galivan.cpp
+++ b/src/mame/drivers/galivan.cpp
@@ -472,8 +472,8 @@ void galivan_state::galivan(machine_config &config)
 
 	YM3526(config, "ymsnd", XTAL(8'000'000)/2).add_route(ALL_OUTPUTS, "speaker", 1.0);
 
-	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.25); // unknown DAC
-	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.25); // unknown DAC
+	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // unknown DAC
+	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.4); // unknown DAC
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
 	vref.add_route(0, "dac1", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac1", -1.0, DAC_VREF_NEG_INPUT);
 	vref.add_route(0, "dac2", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac2", -1.0, DAC_VREF_NEG_INPUT);
@@ -527,10 +527,10 @@ void galivan_state::ninjemak(machine_config &config)
 
 	GENERIC_LATCH_8(config, m_soundlatch);
 
-	YM3526(config, "ymsnd", XTAL(8'000'000)/2).add_route(ALL_OUTPUTS, "speaker", 1.0);
+	YM3526(config, "ymsnd", XTAL(8'000'000)/2).add_route(ALL_OUTPUTS, "speaker", 0.8);
 
-	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 0.25); // unknown DAC
-	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 0.25); // unknown DAC
+	DAC_8BIT_R2R(config, "dac1", 0).add_route(ALL_OUTPUTS, "speaker", 1.0); // unknown DAC
+	DAC_8BIT_R2R(config, "dac2", 0).add_route(ALL_OUTPUTS, "speaker", 1.0); // unknown DAC
 	voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
 	vref.add_route(0, "dac1", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac1", -1.0, DAC_VREF_NEG_INPUT);
 	vref.add_route(0, "dac2", 1.0, DAC_VREF_POS_INPUT); vref.add_route(0, "dac2", -1.0, DAC_VREF_NEG_INPUT);