SYSTEM CONFIGURATIONS
The e6450 is a flexible amplifier, well-suited for a multitude of system configurations. In this section, the most likely configurations are explained in detail.
Once you have selected your desired configuration, you can use the amplifier panel drawing on pages 16 & 17 to mark the required switch positions for easy reference.
BI-AMPLIFIED SYSTEMS
Bi-amplified systems are defined as systems in which separate amplifier channels drive low-frequency (LF) and high-frequency (HF) speakers and are separately filtered to send appropriate frequency ranges to each speaker system.
The most common application of bi-amplification in mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels.
The e6450 is designed to work as the only amplifier in a bi-amplified system.
BI-AMPLIFIED SYSTEM WITH THE e6450
In this configuration, channels 5&6 of the e6450 will drive subwoofers (stereo 75W x 2 at 2Ω or bridged 150W x 1 at 4Ω) with low-pass filtering. Channels 1&2 and channels 3&4 will drive component speakers in stereo (75W x 4 at 2Ω) with high-pass filtering.
Input connection options for a bi-amplified system with one e6450 are as follows:
A) No User Adjustability
Required: a basic source unit or processor with a single pair of stereo outputs.
Input Connections: a single pair of stereo source unit outputs each split with a “Y-Adaptor” allowing the left signal to be sent to the “CH 1 (Left)” and “CH 3 (Left)” inputs and the right signal to be sent to the “CH 2 (Right)” and “CH 4 (Right)” inputs of the e6450 (select “SUM” on the “Input Mode” switch in the “Channel 5 & 6 Controls” section). Result: the relative level of the LF and HF channels will be fixed by the e6450’s “Input Sens.” settings and will not be user adjustable from the front of the vehicle.
B)Fade Front vs. Rear with no Subwoofer Level Control
Required: a basic source unit or processor with two pairs of stereo outputs.
Input Connections: one pair of stereo source unit outputs is connected to the “CH 1 (Left)” and “CH
2 (Right)” inputs and the second pair of stereo source unit outputs is connected to the
“CH 3 (Left)” and “CH 4 (Right)” inputs of the e6450 (select “SUM” on the “Input Mode” switch in the “Channel 5 & 6 Controls” section).
Result: the relative level of the LF and HF channels will be fixed by the e6450’s “Input Sens.” settings and will not be user adjustable from the front of the vehicle.
C)Fade Subwoofer Level vs. HF Level Required: a basic source unit or processor with two pairs of stereo outputs.
Input Connections: the first stereo pair of source unit outputs each split with a “Y-Adaptor” allowing the left signal to be sent to the “CH 1 (Left)” and “CH 3 (Left)” inputs and the right signal to be sent to the “CH 2 (Right)” and “CH 4 (Right)” inputs of the e6450.The second stereo pair of source unit outputs is connected to the “CH 5 (Left)” and “CH 6 (Right)” inputs (select “Discrete” on the “Input Mode” switch in the “Channel 5 & 6 Controls” section).
Result: in this mode, the user has the ability to fade or control the level of the LF channels relative to the HF channels via the source unit’s fader control without exceeding the maximum clean output level set by each amplifier section’s “Input Sens.” controls.
D) Subwoofer Level Control Only
Required: a source unit or processor with one pair of stereo outputs and dedicated subwoofer outputs. Input Connections: the stereo pair of source unit outputs each split with a “Y-Adaptor” allowing the left signal to be sent to the “CH 1 (Left)” and “CH 3 (Left)” inputs and the right signal to be sent to the “CH 2 (Right)” and “CH 4 (Right)” inputs of the e6450.The source unit’s dedicated subwoofer outputs are connected to the “CH 5 (Left)” and “CH 6 (Right)” inputs (select “Discrete” on the “Input Mode” switch in the “Channel 5 & 6 Controls” section).
Result: in this mode, the user has the ability to control the absolute level of the LF channels relative to the HF channels.
E)Independent level control of all three channel pairs
Required: a source unit or processor with two pairs of stereo outputs and dedicated subwoofer outputs.
Input Connections: one pair of stereo source unit outputs is connected to the “CH 1 (Left)” and
“CH 2 (Right)” inputs, the second pair of stereo source unit outputs is connected to the
“CH 3 (Left)” and “CH 4 (Right)” inputs and the source unit’s dedicated subwoofer output is connected to the “CH 5 (Left)” and “CH 6 (Right)” inputs (select “Discrete” on the “Input Mode” switch in the “Channel 5 & 6 Controls” section). Result: in this mode, the user has the ability to control the absolute level of the LF channels as well as both pairs of HF channels.
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IMPORTANT
When using a source unit’s dedicated subwoofer output, set the “Input Sens.” of any channels receiving input from the subwoofer output with the source unit’s subwoofer level control set at 3/4 of full output. See Appendix A (page 12) for details.
Crossover Setup for Bi-Amplified System with one e6450:
Once the input sections have been configured appropriately, go to the “Channel 5 & 6 Controls”. Select “LP” (low-pass) on the “Filter Mode” switch and an appropriate “Filter Freq.” (100 Hz is a good starting point).
Next, turn your attention to the “Channel 1 & 2 Controls” and “Channel 3 & 4 Controls” and select “HP” (high-pass) on the “Filter Mode” switches and an appropriate “Filter Freq.” (again, 100 Hz is a good starting point).
After proper adjustment of the “Input Sens.” controls for all three channel pairs using the method shown in Appendix A (page 12), you can fine tune filter frequencies and attenuate any pair of channels to achieve proper balance. For precise filter frequency information refer to Appendix B (page 13).
