JL Audio J2360.2 Filter Controls, Bass BOost Controls, PreAMP Outputs, Speaker Outputs

Filter Controls

The active filter built into the J2-360.2 can be used to eliminate potentially harmful and/ or undesired frequencies from making their way through the amplifier section to the speaker(s). This serves to improve tonal balance and to avoid distortion and possible speaker failure. Correct use of this filter can substantially increase the longevity and fidelity of your audio system.

HP Off LP

Filter Mode

50 500

Filter Frequency (Hz)

1)“Filter Mode” Control: The J2-360.2 employs a 12dB per octave filter. This filter can be configured into one of two filter types or defeated completely by way of the three- position “Filter Mode” switch:

 “HP” (High-Pass):Configures the filter to attenuate frequencies below the selected filter frequency at a rate of 12dB per octave. This is useful for connection of component speakers the J2-360.2’s in a bi-amplified system.

Off”: Defeats the filter completely, allowing the full range of frequencies present at the inputs to feed the amplifier. This is useful for systems utilizing outboard crossovers or requiring full- range reproduction from the J2-360.2.

 “LP” (Low-Pass):Configures the filter to attenuate frequencies above the selected filter frequency at a rate of 12dB per octave. This is useful for connection of subwoofer(s) to the J2-360.2’s in a bi-amplified system.

2)“Filter Freq. (Hz)” The J2-360.2 has separate Filter Frequency controls in each Channel Controls section for the low-pass filter and the high-pass filter. You will only use one of these in each channel section, depending on which “Filter Mode” you have selected (or none of them if you have selected the “Off” position for the “Filter Mode”).

When active, the filter in the J2-360.2 is fully variable between 50 Hz and 500 Hz via the control knob labeled “Filter Frequency (Hz)”. The “9 o’clock” position corresponds to 80 Hz and is a good starting point for system tuning.

“BASS BOost” Controls

Each channel pair of the J2-360.2 includes a single band, boost-only bass equalizer controlled by a rotary knob marked “Bass Boost”.

This control has a boost range of 0dB (full- counterclockwise) to +9dB (full-clockwise) and is

centered at 45 Hz.

	Prote
O￿	+9dB

z)Bass Boost

PreAMP OUTPUTS

The J2-360.2 incorporates a pass-through preamp output section, so that additional amplifiers can be easily added to the system. This pass-through pre-amp output delivers the same signals that are fed into the amplifier's inputs.

Preamp Am

Outputs I

LEFT

RIGHT

The preamp output signal is not affected by the

“Bass Boost” processing selected for the amplifier or by any crossover filter selected (if the input signal is full-range, the preamp output will be full-range).

Note: The signal level of the “Preamp Output” is

always line-level (low voltage).

Speaker OUTPUTS

The J2-360.2’s speaker outputs are designed to accept 16 AWG - 8 AWG wire.

LEFT CHANNEL RIGHT CHANNEL

Bridged

J2-360.2 is designed to deliver power into speaker loads equal to or greater than 2 ohms per channel when using a “stereo” configuration and speaker loads equal to or greater than 4 ohms

when using a “bridged” configuration.

! IMPORTANT

Speaker loads below 2 ohms nominal per channel are not recommended and may cause the amplifier to initiate a protection mode.

Bridging Considerations

Bridging is the practice of combining the output of two amplifier channels to drive a single load. When bridged, each channel produces signals of equal magnitude, but opposite polarity. The combined output of the two channels provides twice the output voltage available from a single channel. The J2-360.2 has been designed for bridging of its channels without the need for input inversion adaptors.

To bridge a pair of channels, use the

“Left +” and “Right –”speaker connectors only (the “Left –”and “Right +” remain unused). When bridged, the amplifier will deliver optimum power into a 4 ohm load.

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