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HFi55.4 / HFi100.4 4-CHANNEL AMPLIFIER APPLICATIONS
4 CHANNEL FULL RANGE SYSTEM
Here we show how to use the 4 channel amplifiers as straightforward discrete 4 | - HI PASS: N/A |
channel full range units. | - 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 |
Switch setting checklist: | - LOW PASS: N/A |
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- 1/2CH | Level control checklist: |
- 3/4CH | - 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. |
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| CH1/2 |
6V 0.2V | LEVEL | 6V 0.2V |
| LEVEL |
0dB 12dB | BASS EQ | 0dB 12dB |
| BASS EQ |
FULL LPF HPF | FULL LPF HPF |
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60Hz 12KHz | HPF | 60Hz 12KHz |
| HPF |
30Hz 250Hz | LPF | 30Hz 250Hz |
| LPF |
2 3 4 | MODE |
| PROTECT | POWER |
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| LINE OUT |
HF
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| - RIGHT + - LEFT + |
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OUTPUT CH 3/4 |
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CH 1/2 SPEAKER |
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FUSE |
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| GND REM BATT+12V |
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POWER INPUT |
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2 or 3 CHANNEL SYSTEM
Here we show how to use the 4 channel amplifiers as a 3 channel unit by taking advantage of the mono bridging capability of all Hifonics amplifiers.
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 the example to also mono bridge channel pair 1 / 2.
Interconnect cable checklist:
-Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit with good quality RCA cables.
-A MONO signal source is required to bridge channel pair 3/4, such as would be available from the mono sub bass output of an active crossover, whether standalone, or built into a head unit or equalizer. If you only have 1 set of RCA outputs from your headunit, you can simply connect those to the inputs for ch 1/2 and switch the MODE to 3ch. The amplifier will auto sum the signal and provide mono output for bridged channels 3/4.
Important: Do not be tempted to connect the hot, or positive outputs, from any source together to obtain a mono signal, as this could very well damage the output stage of that source.
-It is necessary to feed the SAME signal to both left and right inputs via a Y- adapter RCA cable.
-Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to LEFT - as shown.
Switch setting checklist:
-1/2CH
-3/4CH
Crossover frequency control checklist:
Channels 1/2:
-HI PASS: N/A
-LOW PASS: N/A
Channels 3/4:
-HI PASS: N/A
-LPF: 11 o’clock
TIP: If you are using the mono sub bass output of an active crossover, there is nothing wrong with switching in the low pass filter in these amplifiers for a steeper low pass rolloff.
Level control checklist:
-Refer to the section “Setting up systems after installation for best performance”
Minimum final loudspeaker impedances:
-2 ohm per channel in stereo mode.
-4 ohm mono bridged.
MONO LINE INPUT
(Unless using procedure listed above for 3ch)
STEREO LINE INPUT
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L |
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| CH3/4 |
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6V 0.2V | EVEL | 6V 0.2V |
| LEVEL |
0dB 12dB | BASS EQ | 0dB 12dB |
| BASS EQ |
FULL LPF HPF | FULL LPF HPF |
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60Hz 12KHz | HPF | 60Hz 12KHz |
| HPF |
30Hz 250Hz | LPF | 30Hz 250Hz |
| LPF |
2 3 4 | MODE |
| PROTECT | POWER |
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| LINE OUT |
HF
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| - RIGHT + - LEFT + |
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OUTPUT CH 3/4 |
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CH 1/2 SPEAKER |
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FUSE |
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POWER INPUT |
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