Zesto Audio 2015 12 |
P a g e
Mute
When the mute is engaged it shorts out the output of the unit so there is no signal out. This can also be very
helpful for trouble shooting hum and noise issues.
Mono
This is very useful to test for correct phase in your system. When switched to the mono mode your stereo image
should sound like it is in the center between your speakers. If the image goes all the way out or anywhere but
center it is an indication that there is an out of phase signal in your system.
Grounding
Leto grounding switches only affect the Single Ended outputs, not the Balanced outputs and work independently.
Leaving the equipment on
The filament on the tube will burn out quicker if switched on and off more often.
The tube will wear out quicker if it’s left on all the time. There is no clear choice which is preferred.
Warranty
All Zesto Audio equipment is covered by a 2 year limited warranty for parts and labor to cover defects in materials and
workmanship and 6 month warranty on the original vacuum tubes from date of purchase.
To obtain this original owner warranty the completed warranty registration card should be emailed to the factory within 15
days from date of purchase. The warranty may be transferable during the 2 year period. Please contact factory to register
new owner.
This warranty is void if the product has not been used in accordance with the instructions found in this owner’s manual, or
if it has been misused, abused, damaged by accident or neglect, or in transport once in possession of purchaser. The
warranty is also void if the product has been tampered with or has been repaired or modified by anyone other than Zesto
Audio or its specifically authorized representatives. This limited warranty only applies to Zesto Audio equipment and
carries no responsibility for any other equipment attached to this unit.
Zesto Audio will not warranty any damage caused by “tube rolling”. The warranty only covers the use of12AX7’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 freight at the owner's expense. Returned products must be accompanied by written description
of the defect and a return authorization number that is available from Zesto Audio or the authorized representative. Upon
receipt of the defective product Zesto Audio or the authorized representative agrees to repair the product without charge
for parts and or labor if within the 2 year warranty period, except for vacuum tubes if the unit is more than 6 months old.
The product will then be returned via prepaid insured freight with a carrier at the sole determination of Zesto Audio or the
authorized representative.
Zesto Audio and its partners reserve the right to modify their products or change specifications at any time without
obligation or liability to previous purchasers.
Warranty will cover ownership outside the USA, but shipping is the sole responsibility of the owner. See your local dealer
for factory approved service in your area.
Factory service on non-warranty items will be billed at an hourly rate to be quoted before work is done.
