Butler Audio TDB 3150 User Manual

 

6 

Inputs: 

The high-quality gold plated RCA-type input jacks will easily accept 

the line-level signal supplied from most pre-amplifiers. The input gain 

has been internally preset to equal full (150 Watts) output at 8 

ohms for an input sensitivity of 1.5Volts.  The input impedance is a 
very compliant 47K Ohms which accepts a wide range of signals 

without undue loading. 

   

Since these inputs are unbalanced, it's good practice to keep the 

shielded connecting audio cables as SHORT as possible.  Cable 
lengths longer than 10 feet are not recommended and excessive 

length cables should never be coiled.  Use the proper cable lengths; 

the performance and sound quality of this amplifier is worth it! 

 

Speaker Output Binding Posts: 

Gold plated heavy duty 5-way binding posts with large custom-
machined gold plated hex drive nuts have been supplied to 

accommodate virtually any type of speaker connection.  Speaker 

wire should be kept as short as possible and away from input cables.  

Shielded cables must NEVER be used, as this may cause high 

frequency loss and introduces a needless capacitive load to the 

amplifier.  DO NOT SHORT ANY POST TO ANY OTHER POST! 
 

Speaker Phasing:   

Upper post, RED ring, is POSITIVE.   

Lower post, BLACK ring, is NEGATIVE.  

Correct speaker phasing is essential for optimum operation. 

 

Recommended Channel Assignment: 
While all channels are identical, for minimum heat generation, please 

use the following guide for preferred channel assignment for the 

model 5150: 

Ch 1:  Right Main 

Ch 2:  Right Surround 

Ch 3:  Center Front 
Ch 4:  Left Surround  

Ch 5:  Left Main 

 

The recommended model 3150 Channel assignment: 

Ch 1:  Right Main or Right Surround 

Ch 3:  Center Main or Center Surround 
Ch 5:  Left Main or Left Surround  

 

Remote Operation: 

If remote operation is desired, the 3.5mm mini phone jack is 

provided on the rear panel.  Connecting cable may be either 

shielded or unshielded.  Supply voltage should be between 8 and 13 
V DC, either polarity, from the preamp or other remote source.