Friday, May 25, 2012

Zesto Audio Leto Preamplifier


World premier of the Leto Preamp at T.H.E Show Newport Beach June 1, 2 & 3, 2012, Newport Beach, CA



5 Inputs
3 sets of Single Ended inputs with an impedance of 100K Ohms
2 sets of true Balanced transformer inputs (pin 2 hot) with an impedance of 10K Ohms
Maximum input level of 4 Volts RMS


4 Outputs
2 sets of true Balanced transformer outputs (pin 2 hot) with an impedance 150 Ohms
2 sets of Single Ended outputs with an impedance 150 Ohms
Maximum output level of 10Volts RMS +20dB
Independent ground lift switches on the left and right Single Ended outputs
1 set of Single Ended Cinema bypass outputs from input #1

Detailed Specifications

Frequency response 10Hz to 100Khz - 1dB with 10K Ohm load
Distortion ~ 0.02% at 1V RMS input
Gain 12dB
Signal to noise ~ 100dB below operating level
Non inverting output polarity          
Cross talk >90dB
Front panel adjustable balance control
Remote control volume, mute and mono
Remote bypass switch on rear panel (just in case the remote is misplaced)
1% metal film resisters throughout
Polypropylene capacitors throughout the audio path


Power consumption 27W, 0 drain when off
Voltage 110/120V AC 60Hz
Optional factory installed 240V AC 50/60Hz
Standard 3 pin IEC power connector
ON/OFF power switch conveniently located on the side panel
Two internal high quality linear regulated power supplies, 250V and 12V

Active Components

Two (2) Gold pin JJ ECC83S/12AX7 vacuum tubes
Two (2) Gold pin JJ ECC82/12AU7 vacuum tubes
High quality ceramic sockets

Other Features

Each unit is hand made in the USA
50 hour factory burn in on all circuits and vacuum tubes
Dimensions 17” W X 12” D X 5” H
Weight 23 lbs.
16 gauge zinc plated steel enclosure
Award winning Isonode anti-vibration feet
Two year limited warranty
Six months warranty on Vacuum Tubes
Recessed RCA and XLR connectors are Gold plated with an isolated ground.
All switches and knobs are easily accessible, nothing hidden inside to adjust.