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-rw-r--r--src/mame/drivers/s4.cpp1
1 files changed, 0 insertions, 1 deletions
diff --git a/src/mame/drivers/s4.cpp b/src/mame/drivers/s4.cpp
index 9edb22f9136..33265e28e2c 100644
--- a/src/mame/drivers/s4.cpp
+++ b/src/mame/drivers/s4.cpp
@@ -494,7 +494,6 @@ void s4_state::s4a(machine_config &config)
SPEAKER(config, "speaker").front_center();
MC1408(config, "dac", 0).add_route(ALL_OUTPUTS, "speaker", 0.5);
voltage_regulator_device &vref(VOLTAGE_REGULATOR(config, "vref"));
- vref.set_output(5.0);
vref.add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
vref.add_route(0, "dac", -1.0, DAC_VREF_NEG_INPUT);