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i n f o @ m a s t e r p l a n t . c o m

 

 

 

masterplant

 

passive electronics, active sound

 

 

 

ATTENUATOR MKIV

 

Is there really need for another attenuator? Yes, if you believe that it is important to 
keep the impedance constant. Any mismatch will affect the amps frequency 
bandwidth and output power. It will also put unnecessary strain on your amp, and can 
lead to damage of tubes and output transformer. This unit will keep the impedance 
constant at both the input and output. This latest version have an impedance selector 
added and separate full range and speaker simulated line outputs. 

 

  Constant impedance at input and output 

  150W power handling 

  Five steps of atten variable 

  Full range and speaker simulated line out 

  Supports 4

-8

-16

 amplifiers 

  Dual speaker out 

 

 

1= 0db (bypass) 

 

2= -3db 

 

3= -6db 

 

4= -9db 

 

5= -13db 

 

6= -17db (Load and variable position) 

 

 

 

  

 

 

Summary of Contents for ATTENUATOR MKIV

Page 1: ...ry strain on your amp and can lead to damage of tubes and output transformer This unit will keep the impedance constant at both the input and output This latest version have an impedance selector added and separate full range and speaker simulated line outputs Constant impedance at input and output 150W power handling Five steps of attenuation variable Full range and speaker simulated line out Sup...

Page 2: ... computer audio card 5 Choose Full Range Line Out if using impulses Dry Wet with attenuation 1 Connect left amp speaker out to ATTENUATOR input 2 Set amp to match 3 Connect ATTENUATOR speaker out to left speaker cab 4 Connect Full range Line Out to input of delay effect 5 Connect delay output of effect to right amp input 6 Connect right amp speaker out to right speaker cab ...

Page 3: ...ut tubes if you intend to run it at full tilt for an extended period Why not add a fan as other manufactures There are several reasons but an added fan will affect impedance and also add noise It would also make the unit larger which had to be taken into consideration Is this unit safe to use Yes if you make sure that your amp and speaker is matched to the ATTENUATOR Modern amps are much more tole...

Page 4: ... the ventilation holes Avoid mismatching impedance as that will put unnecessary strain on your amp and can lead to damage of transformers and tubes 2 year limited warranty The warranty applies to defective material and workmanship and for the original purchaser when bought from MASTERPLANT or authorised dealer Opening the unit will void the limited warranty and any required service or update must ...

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