Zesto Audio Leto Ultra, Owner'S Manual

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Front Controls and LED’s
Left Knob is the Volume Control

The volume goes from 0 to 10 and is indicted by the black dot on the front of the
knob.

There are no LED indicators.

Volume is adjusted manually by turning the knob or with the remote control.

Adjust the Gain so your normal operating volume is around 12 o’clock.
Center Knob is the Presence Control & Mono

The “0” position is the Leto Ultra Preamp without any Presence features
engaged.

In “0”position Presence is not connected in the circuit.

Center knob defaults to “0” when it’s turned on

Center knob defaults to “0” when you change inputs.

Presence can be adjusted manually by turning knob or with the remote control.

Mono is adjusted by Pushing-in this knob, do not turn to adjust.

The “Mono” function indicated by the LED.

Mono combines the left and right inputs.

The best use of the Mono feature is in setting up your system to establish a good
center image and trouble-shooting for phase problems.

Mono can be used for old Mono cartridges that have only one output.
Right Knob is the Inputs Control & Mute

You have 6 inputs. 1 to 3 are Single Ended and 4 to 6 are Balanced.

Inputs are adjusted manually by turning knob or with the remote control.

Inputs can be adjusted on the “fly” with a slight delay and small mechanical click
from the relays.

While switching inputs the unit will go to Mute momentarily