MASTERPLANT ATTENUATOR MKIV Quick Start Manual

masterplant

passive electronics, active sound

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 attenuation + variable

 Full range and speaker simulated line out

 Supports 4Ω-8Ω-16Ω amplifiers

 Dual speaker out

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1= 0db (bypass)

•

2= -3db

•

3= -6db

•

4= -9db

•

5= -13db

•

6= -17db (Load and variable position)

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

Table of Contents

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Page 1 ™ 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.
Page 2 DIRECT Recording 1) Connect amp speaker out to ATTENUATOR input 2) Set amp to match 3) Set Attenuator to position 6 4) Connect Line Out to 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...
Page 3 Attenuator 1) Connect amp speaker out to ATTENUATOR input 2) Make sure your amp is matching your ATTENUATOR 3) Connect ATTENUATOR speaker out to speaker cab 4) Adjust attenuation level Can I use this unit with any amp or speaker? It supports 4Ω-8Ω-16Ω...
Page 4 MASTERPLANT or authorised dealer. Opening the unit will void the limited warranty and any required service or update must be performed by MASTERPLANT. A copy of the original receipt must be included with the unit. Warranty will not cover damage caused by misuse or accidents. It will not cover any damage inflicted to other equipment resulting from impedance mismatching or any other faulty use.