Speaker cables
Install the speaker cables first. We recommend the use of high-quality cables terminated with spade or
ring lugs that will fit the amplifier’s binding posts. We advise against the use of bare-wire connections.
Note that the positive (+) binding post has a red ring and the negative (-) binding post has a black ring.
Double-check to confirm that you are connecting your speaker cable’s conductors to the appropriate
binding posts—red to positive, black to negative. If your cables are marked to show desired signal flow,
orient the cable so that the installation conforms to the cable manufacturer’s instructions.
Carefully loosen each speaker binding post to install speaker cables tipped with spade lugs or rings.
Turn counter-clockwise to loosen. If using spade lugs, insert each spade lug so that its two tines
straddle the binding post, then tighten the binding post nut with a binding post wrench. If using rings,
remove the binding post nut entirely, place the ring on the binding post, then replace the nut and
tighten it securely.
A firm connection, tight enough that the spade lug or ring cannot move, is all that’s needed. Do not
use a conventional wrench to tighten the binding posts.
Be sure the wires are not in contact with
one another.
Interconnect cables
Connect the XLR cable to the input by pushing the cable onto the jack. To release the XLR cable, push
on the small tab on the end of the jack then grasp the cable by the plug and gently pull it out. Never
grasp interconnect cables by the cable itself—you could damage the cable.
12-volt trigger input and output
The 1/8-inch (3.5mm) 12-volt trigger input and output jacks allow the Relentless to turn on automatically
when connected to a preamp or home automation system with 12-volt trigger output. Connect a
cable with a 1/8-inch plug (stereo or mono) on each end from the preamp’s 12-volt trigger output
to the amplifier’s 12-volt trigger input, and a second cable of the same type from the amp’s 12-volt
trigger output to the other amplifier’s 12-volt trigger input. The amplifiers will automatically power up
whenever the preamp is powered up.
MAKING CONNECTIONS TO THE
RELENTLESS MONOBLOCK AMPLIFIER
1. Heat sink venturis
2. Top panel vents
3. Power meter
4. Standby/power button
5. XLR audio input
6. 12-volt on/off trigger input
7. 12-volt trigger output
8. Three-position toggle switch for
power meter brightness
9. Speaker cable binding posts
10. Main power switch
11. AC power cord terminals
4
2
3
1
6
7
9
10
8
5
11
