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Limited Two-Year Warranty* 

1.  Your  new  product  is  covered  by  a  limited  two-year  warranty 

against defects in material and workmanship. Any repairs 

required will be made at no charge within the first two years after 

purchase as a new unit. 

2. Any units returned for warranty repair must be shipped prepaid 

after  receiving  return  authorization.  If  possible,  the  unit  should  be 

shipped  in  its  original  packaging.  If  such  is  not  possible,  the  unit 

should be well packed with particular attention paid to protection 

of all corners and avoidance of any looseness in the carton.  

3. This warranty does not apply to damage resulting from physical 

abuse or unauthorized alterations or repairs, or from tube rolling or 

adapter  use,  or  from  the  use  of  third-party  components,  or 

damage to exterior finish resulting from careless use.  

4.  The  warranty  is  void  if  the  serial  number  has  been  removed, 

altered, or defaced. 

5. This warranty is void if improper voltage is applied to any input or 

output. 

6.  If  Linear  Tube  Audio  determines  after  receiving  the  unit  that 

damage was misrepresented and has been caused by something 

not  covered  by  the  warranty,  the  customer  must  pay  for  any 

necessary repairs before the unit is returned to the customer. 

7.  Linear  Tube  Audio  reserves  the  right  to  improve  or  change  its 

products  without  obligation  to  modify  previously  manufactured 

units. 

* Applicable for domestic sales only. There is a one year warranty 

for  overseas  customers.  Handling  and  shipping  costs  are  the 

responsibility of the overseas customer. 

Service Note 

ZOTL amplifiers use a unique circuit and even trained technicians 

familiar  with  tube  amplifiers  may  not  know  how  to  correctly  work 

on  LTA  products.  Please  contact  us  before  attempting  any 

alteration  or  repair,  whether  you  are  concerned  about  the 

warranty or not.

Summary of Contents for ZOTL40 Reference

Page 1: ...ns extremely high voltages and the user should not attempt to service the amplifier Furthermore this amplifier generates radio frequency energy that can interfere with communications equipment Introduction The ZOTL40 Reference is a Class AB tube amplifier utilizing ZOTL Zero hysteresis Output Transformer Less technology It is a stereo power amplifier that can also be used in a mono block configura...

Page 2: ...g from careless use 4 The warranty is void if the serial number has been removed altered or defaced 5 This warranty is void if improper voltage is applied to any input or output 6 If Linear Tube Audio determines after receiving the unit that damage was misrepresented and has been caused by something not covered by the warranty the customer must pay for any necessary repairs before the unit is retu...

Page 3: ...hm Input Sensitivity 1 2V RMS for full output Input Impedance 50K Output impedance 1 6 Ohms Gain 23dB Noise 94dB Frequency Response 0dB 5dB 8Hz 50kHz Input Voltage Universal Tube Complement 2x 12AU7 2x 12AX7 4x EL34 Size W 17 43cm H 5 12 7cm D 13 875 35 2cm Weight 17 5 lbs 7 9kg ...

Page 4: ...igned auto switching power supply and can be used universally Hook up your source and speakers Once your system is set up and everything is plugged in turn your system on The Z40 Reference is powered on and off via the toggle switch in the center of the face plate When first powering on the tubes can take 30 45 to warm up before music starts playing Sometimes there is a high pitched or distorted s...

Page 5: ......

Page 6: ...cuit that will shut down the amplifier internally if certain parameters are sensed The protection circuit can also be triggered by over driving the amplifier If the amplifier goes into protection bright white LEDs will light up on the audio board which should be visible through the top of the case on the left side if you are looking at the front of the amp More obviously if the amplifier goes into...

Page 7: ...ns which are designed in such a way that the white ceramic part may shift slightly This is an intentional design the tube socket is very secure Before changing tubes turn off the amplifier and wait at least 10 minutes to allow the stored power to discharge Avoid touching any of the components on the circuit board especially the vertical circuit boards Fuses The ZOTL40 has two fuses on the power bo...

Page 8: ...NOTES ...

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