Hifionics HFI55.4, HFI100.4, HFI1000D, HFI1500D Channel full range units, Level control checklist

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
- 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.

	L			CH3/4
				CH1/2
6V 0.2V	LEVEL	6V 0.2V		LEVEL
0dB 12dB	BASS EQ	0dB 12dB		BASS EQ
FULL LPF HPF	X-OVER	FULL LPF HPF		X-OVER
60Hz 12KHz	HPF	60Hz 12KHz		HPF
30Hz 250Hz	LPF	30Hz 250Hz		LPF
2 3 4	MODE		PROTECT	POWER
				LINE OUT

HF

			- RIGHT + - LEFT +
OUTPUT CH 3/4	BRIDGED
CH 1/2 SPEAKER			RIGHT + - LEFT +
	BRIDGED
FUSE			-
		GND REM BATT+12V
POWER INPUT

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 X-OVER: FULL

-3/4CH X-OVER: LPF

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

4

L		R		CH3/4
L		R		CH1/2
6V 0.2V	EVEL	6V 0.2V		LEVEL
0dB 12dB	BASS EQ	0dB 12dB		BASS EQ
FULL LPF HPF	X-OVER	FULL LPF HPF		X-OVER
60Hz 12KHz	HPF	60Hz 12KHz		HPF
30Hz 250Hz	LPF	30Hz 250Hz		LPF
2 3 4	MODE		PROTECT	POWER
				LINE OUT

HF

			- RIGHT + - LEFT +
OUTPUT CH 3/4	BRIDGED
CH 1/2 SPEAKER			RIGHT + - LEFT +
	BRIDGED
FUSE			-
		GND REM BATT+12V
POWER INPUT