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Detailed Specifications 

  Remote control Input, Volume, Mute, Mono, Presence and Gain settings 

  All adjustments can be operated manually (just in case the remote is misplaced) 

  Frequency response 10Hz to 40Khz ~ 2dB 

  Distortion ~ 0.013% with 1V RMS input 

  Signal to noise ~ 100dB below operating level 

  Non inverting output polarity 

  Cross talk >90dB 

  1% metal film resisters throughout 

  Polypropylene capacitors throughout the audio path 

 

Power 

  Power consumption 28W, 0 drain when off 

  Voltage 110/120V AC 60Hz 

  Optional factory installed 220V or 230/240V AC 50/60Hz 

  Standard 3 pin 15 Amp IEC power connector 

  ON/OFF power switch conveniently located on the side panel 

  Two internal high quality linear regulated power supplies, 250V and 12V 

 

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 28 lbs. 

  Shipping weight 30 lbs.(12.70 kg) 

  Shipping box: 21”w x 21”d x 11”h (53.34cm x 53.34cm x 27.94cm) 

  16 gauge zinc plated steel enclosure 

  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. 

 

 

 

 

 

 

Содержание Leto Ultra

Страница 1: ...wner s Manual Please read carefully before installing and operating this equipment Zesto Audio 3138 Calle Estepa Thousand Oaks California 91360 805 807 1840 www zestoaudio com Email george zestoaudio...

Страница 2: ...about sound That s a good thing Each unit is built by hand with precision and pride to produce the most enjoyable listening experience for you I am proud to put my name on it and honored to share this...

Страница 3: ...l Controls Page 10 11 Remote and Manual Controls Page 11 Vacuum Tube Layout Page 12 Hookup Settings and Adjustments Page 13 14 Tips and Tricks Page 15 16 Warranty Information Page 17 What s in the box...

Страница 4: ...tructions with the suggested mounting accessory 4 WALL OR CEILING MOUNTING Do not mount the unit on a wall or ceiling 5 WATER AND MOISTURE Do not use the unit near water for example near a swimming po...

Страница 5: ...on or against them Pay close attention to cords where plugs enter the AC outlet and where they exit from the unit 12 LIGHTNING For added protection during a lightning storm or when the component is i...

Страница 6: ...ing code Questions about cables inside of walls should be directed to a qualified custom installer licensed electrician or low voltage contractor 18 RECORDING COPYRIGHT Recording of copyrighted materi...

Страница 7: ...und lift switches on the left and right outputs Presence 6 position remote or manual Presence control Presence 0 1 2 3 4 5 low pass shelf 0 Presence feature is not engaged completely disconnected from...

Страница 8: ...ctory installed 220V or 230 240V AC 50 60Hz Standard 3 pin 15 Amp IEC power connector ON OFF power switch conveniently located on the side panel Two internal high quality linear regulated power suppli...

Страница 9: ...BAL Outputs 4 sets Two sets of RCA SE 2 sets of XLR transformer balanced outputs Left and right Ground ON OFF switch Connects or disconnects the ground to the Single Ended outputs Gain push button sw...

Страница 10: ...en 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...

Страница 11: ...tion Don t turn the knob to manually adjust Mute that will change your inputs Gain LED s will cycle through the three gain positions 3 dB 6 dB and 9 dB Adjust with the remote on the fly The Manual Gai...

Страница 12: ...e Mute Preamp defaults to Mute every time it is first turned on and momentarily when you change inputs Mute yellow LED is located on the front panel with the input knob Press the Mute button for ON OF...

Страница 13: ...s Warm up Allow at least 10 to 30 minutes for tubes to warm up to get the best performance from the preamp Power Carefully plug in the AC power cable to the preamp first then to your main power Turn i...

Страница 14: ...it will sound terrible and wear out the tubes prematurely The sockets are labeled in order to correctly plug in the right tube in the right socket Using the glove provided unpack and carefully plug i...

Страница 15: ...struments It does not boost or cut the bass or boost the treble but gently reduces the treble in the range that can become unpleasant The intent of the Presence control is to keep the essence of the m...

Страница 16: ...for the output tubes Any damage caused by tube rolling is NOT covered by the manufacturer s warranty Mono for System Set Up I recommend using the Mono function primarily to help you setup and trouble...

Страница 17: ...ers the use of12DW7 s and 12AU7 s in their proper positions To return the product it must be packed in its original packaging and returned to Zesto Audio or its authorized representative via insured f...

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