Butler Audio TDB 3150 Inputs, Speaker Output Binding Posts, Speaker Phasing, Remote Operation

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.

Note: Never short ANY speaker post to ANY other speaker post! Connect 1 separate speaker load to each channel. DO NOT attempt to Bridge between channels in any way!

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.

Note: Remember to leave the front panel power switch "OFF" (down) for remote operation

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