Impact Acoustics HC 75.2, HC 150.2, HC 250.2, HC 550.2 Owner's Manual

Owner manual
HC Series ampliers

HC 75.2 - HC 150.2 - HC 250.2 - HC 550.2

2

INTRODUCTION

Congratulation on your purchase of a new Impact
High Current amplier.
We, at Impact, are aware of the fact that your
choice of an HC series amp has been deeply
thought out and that your expectations are high;
be sure that this product will fulll them all.

This HC amp is a sum of technology and good
sense that join sound reproduction quality with
the extraordinary capability to drive 1 Ohm
stereo as well as 2 Ohm mono loads.
This amp’s performances are unequalled and can
match any installation needs.

IMPORTANT

Impact HC ampliers are advanced units, pro­vided with a sophisticated control system that
guarantees superior performances.
HC ampliers will give you a life of uncompro­mised musical service under the strict condition
of a perfect installation; this requires car audio
installation knowledge and technique as well as
proper installation tools and equipment.
For this reason, we highly recommend you to ap­ply to professional Impact Authorized Installers to
be sure of the absolute guarantee in terms of best
performances and safe installation.
If you decide to install your HC amplier by
yourself, we recommend you to read this owner’s
manual very carefully and to follow strictly all in­structions inside.

INDEX

Introduction pag 2
Important pag 2
Warning pag 2
Main Features pag 3
Specications pag 3
Controls pag 4
Control Panel pag 4-5
Installation pag 6
Wiring System Nr. 1 pag 7
Wiring System Nr. 2 pag 8-9
Wiring System Nr. 3 pag 10-11
Mach Impact HC ampliers
to Impact subwoofer pag 12-13
Troubleshooting pag 14

WARNING

Impact HC ampliers can reproduce high sound
pressure levels that can cause permanent dam­ages to your hearing system by long exposures.
The human hearing system is so deceiving as it
gets used to high sound pressure levels very soon;
as a consequence, a high sound level, which is
perceived as «ordinary», can be really dangerous.
We want you to take care of your ears so, in order
to avoid any inconvenience, state a safe sound
level.
State it before your hearing get used to extreme
loud volumes, just acting as follows:

1. Start listening at the lowest volume

2. Increase slowly your volume level by steps till
the sound is clear and pleasant without distor­tion.

3. Once you have stated the comfort volume lev­el, take due notice of it and do not overcome
it.

3

SPECIFICATIONSMAIN FEATURES

• Stereo, Bridged and Tri-Mode System
application Compatible

• Full Mos-Fet Circuitry

• 1 Ohm Stable Stereo Operation

• 2 Ohm Stable Mono Operation

• Variable input level controls

• Built-in excludible Low Pass/High Pass
Crossover

• Switchable low pass crossover slope

• 24 dB/Oct Variable subsonic Filter

• Built-in adjustable Bass-Boost

• Bass boos remote control phone jack

• High Temperature Thermal Management
System Circuitry

• Overload Protection System

• Output Short Circuit Protection

• DC Offset Circuit Protection

• RCA Line Output

HC 75.2 HC 150.2 HC 250.2 HC 550.2

RMS Power @ 4 Ohm - 13,8 V

W

2 x 75 2 x 150 2 x 250 2 x 500

RMS Power @ 2 Ohm - 13,8 V

W

2 x 150 2 x 270 2 x 400 2 x 700

RMS Power @ 1 Ohm - 13,8 V

W

2 x 225 2 x 325 2 x 500 2 x 900

Mono Bridged RMS Power @ 4 Ohm - 13,8 VW1 x 300 1 x 540 1 x 800 1 x 1.400

Mono Bridged RMS Power @ 2 Ohm - 13,8 VW1 x 450 1 x 650 1 x 1.000 1 x 1.800

Total Harmonic Distortion

%

0,03 0,03 0,03 0,03

Input Sensitivity

V

0,2 ÷ 9 0,2 ÷ 9 0,2 ÷ 9 0,2 ÷ 9

Input Impedance

Kohm

47 47 47 47

Frequency Response

Hz

10 ÷ 30.000 10 ÷ 30.000 10 ÷ 30.000 10 ÷ 30.000

Signal to Noise Ratio

dB

> 95 > 95 > 95 > 95

Damping Factor

250 250 250 250

High Pass Crossover Range

Hz

10 ÷ 4.000 10 ÷ 4.000 10 ÷ 4.000 10 ÷ 4.000

Low Pass Crossover Range

Hz

40 ÷ 4.000 40 ÷ 4.000 40 ÷ 4.000 40 ÷ 4.000

Subsonic Filter Range (24 dB/Oct)

Hz

10 ÷ 150 10 ÷ 150 10 ÷ 150 10 ÷ 150

Bass Boost 45 Hz

dB

0 / +18 0 / +18 0 / +18 0 / +18

Bass Boost Remote Control Jack

Yes Yes Yes Yes

Line Output

Yes Yes Yes Yes

Dimensions (W x H x D)

mm

260x60x345 260x60x390 260x60x450 260x60x855

4

CONTROLS

The Impact HC ampliers feature an extremely
exible set of input and output controls
which permit the widest range of installation
opportunities. In order to ensure best
performance, any adjustment should be made
after the amplier is installed and all input,
speaker and power connections are completed.

CONTROL PANELS

1. RCA LINE INPUT JACKS
It allows left and right inputs to be

connected to the amplier using RCA plugs.

2. SUBSONIC FILTER FREQUENCY CONTROL
Adjust crossover frequency of the subsonic

lter only, from 10 Hz to 150 Hz.

3. LOW PASS FILTER FREQUENCY CONTROL
Adjust crossover frequency of the low pass

output only, from 40 Hz to 4.000 Hz.

4. STEREO/MONO SWITCH
When set in MONO mode, the low pass signal

is mono with a 24 dB/Oct crossover slope.

When set in STEREO mode, the low pass signal

is stereo with a 12 dB/Oct crossover slope.

5. AMPLIFIER X-OVER SELECT SWITCH
a. LOW position: crossover operates in low-

pass mode
b. FULL position: crossover off
c. HI position: crossover operates in high-pass

mode

6. HIGH PASS FILTER FREQUENCY CONTROL
Adjust the crossover frequency of the high pass

output only, from 10 Hz to 4.000 Hz.

7. INPUT LEVEL CONTROL
Provides input level adjustment from 200 mV

to 9 V.

8. BASS EQ CONTROL
Adjust the 45 Hz frequency output from + 0 to

+18 dB.

11

9

8

7

5

6

4

3

2

1

10

12

5

CONTROL PANELS

9. POWER LED (green)
Illumination of this led indicates that

the amplier is operating normally.

10. PROTECTION LED (red)
Illumination of this led indicates that a short

circuit exist somewhere in your system. The
amplier turns off.

11. RCA LINE OUTPUT JACKS
Line out signal is automatically set by the

position of the amplier crossover select switch
(5).

When amplier crossover switch is in LOW

position (i.e. 150 Hz), line output signal is
automatically set in HIGH PASS mode at 150
Hz.

When amplier crossover switch is in Full

position line output signal is Full Range

When amplier crossover switch is in HI position

(i.e. 200 Hz), line output signal is automatically
set in LOW PASS mode at 200 Hz

12. BASS BOOST REMOTE CONTROL PHONE
JACK

Connecting the optional remote controller

(HC-R2) to this plug, you can set the bass boost
while driving