Rockville KRYPTON MF3 Owner'S Manual Download Page 6

Page: 6 / 28

Settings

Adjusting the System

Once the system is operational, set all crossover points to the approximate settings. In the case of a basic subwoofer system, set the Low Pass Filter (LPF) crossover at 100Hz or so.

Set the Bass Equalizer to 0dB (Channels 3 and 4 only) and the Subsonic to between 25Hz and 35Hz. Turn the controls using a small flathead screwdriver. Do not apply any pressure while
turning as this might break the control unit.

Set the amplifier’s Input Sensitivity using the control accessible on the side of the amplifier marked LEVEL (gain).

Turn it counterclockwise to the MIN position. Adjust your head unit’s

volume gain to the maximum it can go before signal distorts or to the loudest gain, which is usually about 75% – 85% on most head units (you can also use an oscilloscope to see at
what gain level your head unit distorts). When you begin to hear distortion, back down one notch. Now turn the LEVEL control on the amp clockwise until you hear distortion, then turn it
counterclockwise by a notch or until the distortion is gone. The amp’s input sensitivity is now set. It is helpful to have a second person to help you set the gain. When setting up a multi-
amp system, set each amplifier’s level controls separately. Start off with the bass amplifier, then adjust the highs amplifier’s level control to match. Please note that the level control of any
vessel amplifier should not be mistaken for a volume control. It is a sophisticated device designed to match the output level of your source unit to the input level of the amplifier. Do not
adjust the amplifier level to maximum unless your input level requires it. Your system can also be extremely sensitive to noise when the input level is set to maximum and does not match
your input signal. These adjustments need to be made only once when first setting up the system.

Once you are satisfied with the level control settings, use any equalizer controls to adjust the system’s tonal level for personal preference. Keep in mind that after equalizing you may

have to go back and reset the amplifier’s level controls.

If your unit has been professionally installed please do not change the gain settings set by the installer, he is the professional!

Using the Electronic Crossovers

KRYPTON Series Class AB Marine amplifiers feature fully adjustable 12dB per octave low-pass (band pass), high-pass, and full-range electronic crossovers.

For Low-Pass systems, set the CROSSOVER MODE switches to LPF (BPF). Now the control marked LPF will control the low-pass frequencies from 40Hz – 4KHz (F1, F2) and 50Hz – 250Hz
(T2). A frequent mistake made is setting the low-pass frequency too low, especially when using vented subwoofer enclosures. We recommend that for most installations you do not set
the frequency knob lower than 80Hz.

When using the amplifiers for coaxial or component speakers, you will want to set the CROSSOVER MODE switch to FULL (preferred) or HIGH PASS. The HPF control knob adjusts the
high pass frequencies between 15Hz – 4KHz.

Audio Preamp Input

All KRYPTON Marine amplifiers feature RCA pre amp inputs. Run RCA cables from your sound source to the amplifier inputs. We suggest you use high quality, shielded RCA patch cords
to help reduce and eliminate unwanted electrical noise to your system. Use good quality RCA interconnect cables. Cheaper cables usually have poor shielding that can cause interference
pickup.

Be sure to run the RCA cables on the side of the vessel opposite to the side used to vesselry the power and ground leads of the amplifier.

Subsonic Filtering

For subwoofer installations with a passive LP crossover, you can set the amplifier’s CROSSOVER MODE selector to HPF while setting the HPF knob from the lowest setting to 30Hz. This
will act as a SUBSONIC FILTER for all signals below that setting. This is especially useful for vented enclosures where the port tuning frequency falls below the subwoofer tuning frequency
to protect against subwoofer unloading. If there is no passive crossover, and it is a raw woofer, they can set the switch to LPF (BPF) and use the bandpass mode by setting the HPF to
30Hz and the LPF to 120Hz.