Butler Audio MONAD A100 - Manual (Page 6)

Inputs:
The highest-quality Rhodium plated Cardass RCA-type input jack will
accept the line-level signal supplied from most pre-amplifiers. The
silver plated Neutrik XLR accepts true balanced signals. The input
gain has been internally preset to equal full (100 Watts) output at 8
ohms for an input sensitivity of 1.7 Volts. The input impedance is a
very compliant 47K Ohms at each input to accept a wide range of
signals without undue loading.
It is good practice to keep the shielded connecting input 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 Post:
A top-of-the-line Rhodium / Gold plated Cardass heavy duty 5-way
binding post is 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 an
unnecessary capacitive load to the amplifier. DO NOT SHORT
ACROSS SPEAKER BINDING POST!
Speaker Phasing:
Correct speaker phasing is essential for optimum operation. As
most applications will use at least a pair of MONAD amplifiers, be
certain to connect the positive or + speaker lead to the + speaker
output binding posts and likewise for the – speaker lead and binding
posts. Otherwise weak bass response and phase errors will be
introduced, greatly degrading the sound quality.