- HI PASS: 100 Hz - LOW PASS: N/A Interconnect cable checklist: - Using good quality RCA cables, feed the front and rear outputs of a head unit to 1 channel bass amplifier: the inputs of the 4 channel amplifier as shown. - Subsonic filter: 10 Hz to 40 Hz - Also connect the LINE OUT of the 4 channel amplifier to the LINE INPUT of the - LOW PASS: 80 Hz 1 channel amplifier as shown. Please note that these frequency points are suggestions only. Refer to the Mono bass woofer wiring: loudspeaker manuf

Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input sensitivities properly to the head unit output signal level. It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual. If the Radi

LOW PASS: N/A Interconnect cable checklist: Channels 3/4: - Using good quality RCA cables, feed the front and rear outputs of a head unit to - HI PASS: 100 Hz the inputs of the 4 channel amplifier as shown. - LOW PASS: N/A - Also connect the LINE OUT of the 4 channel amplifier to the LINE INPUT of the 2 channel amplifier as shown. 2 channel bass amplifier: - HI PASS (Subsonic filter): 10 Hz to 40 Hz Mono bass woofer wiring: - LOW PASS: 80 Hz Connect the mono speaker positive terminal to the LEFT

A “Y” adapter - 1 ohm. may be needed as shown in the diagram. - Use at least 16 gauge speaker wiring. These amplifiers have dual speaker terminals, simplifying the hookup of multiple speakers. The 2 positives are the same and the 2 negatives are the same. Crossover frequency control checklist: - LOW PASS: 35Hz to 250Hz - SUBSONIC:15 Hz to 35 Hz - BASS EQ: 0 to 10dB - PHASE: 0 to 180 degrees Level control checklist: - Refer to the section “Setting up systems after installation for best performanc

The system sound level will of course be very low, and the following procedures will help you to match the amplifier input sensitivities properly to the head unit output signal level. It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual. If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts. If you are not sure what the Radio output sensitivity is, follow these gener

This state of affairs will be indicated by the front panel PROTECT LED lighting up under the following conditions: 1 - A sort circuit on the loudspeaker leads. 2 - An internal amplifier fault that causes a DC offset on the loudspeaker output. Should the amplifier go into diagnostic mode, simply disconnect all RCA and speaker leads, while keeping +12 volt, power ground and remote leads connected. 1. Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fa

Electrical interference The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners, to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first unplug amplifier input RCA cables, if the noise is still present, check the speaker leads, if not, plug the RCA’s back, and investigate the source d

- 1/2CH X-OVER: FULL - 3/4CH X-OVER: LPF The following example shows how to create a 3 channel system by mono bridging channel pair 3 / 4. In order to create a 2 channel system, simply follow Crossover frequency control checklist: the example to also mono bridge channel pair 1 / 2. Channels 1/2: - HI PASS: N/A Interconnect cable checklist: - LOW PASS: N/A - Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit with good quality RCA cables. Channels 3/4: - A MONO si

Finally, connect the main +12 volt cable to the battery, with the main fuse removed, and we are almost ready to power up the system. Power up the system: The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work properly immediately. First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers to 0 dB (no boo

- LOW PASS: N/A Interconnect cable checklist: Channels 3/4: - Connect the four inputs of the amplifier to a Radio/CD with quality RCA cables. - HI PASS: N/A - LOW PASS: N/A Switch setting checklist: - 1/2CH X-OVER: FULL Level control checklist: - 3/4CH X-OVER: FULL - Refer to the section “Setting up systems after installation for best performance” Crossover frequency control checklist: Minimum final loudspeaker impedances: Channels 1/2: - 2 ohm per channel. Here we show how to use the 4 channel