Heritage HTG157, HTG237, HTG257, HTG2100D, HTG447 User Manual

ONNECTING THE POWER

C

UTION:

CA

AS A PRECAUTION, DISCONNECT THE POWER WIRE FROM THE BATTERY WHILE MAKING THE
POWER AND GROUND CONNECTIONS TO THE AMPLIFIER.

4/8 GA

UGE(Thicker if planning for additional Amplifiers) wire is recommended for

both the power and ground wires 12 Gauge, for the remote turn-on wire 16 Gauge.
Both types are available at most Mobile Audio Dealers or Installation Shop.

(1) Ground : To Vehicle Chassis
To avoid unwanted ignition noise caused by ground loop, it is essential that the
Amplifier be grounded to a clean, bare, metal surface of the vehicle's Chassis

NO

TE :

GROUND WIRE SHOULD NOT BE EXTENDED MORE THAN 3 FT. (1 METER).

(2) +12

Volt(Fused) Constant Power: To Battery (+)
Due to the power requirements of the Amplifier, this connection should be made
directly to the positive (+) terminal of battery. For safety measures, install an in-line
Fuse Holder (not included) as close to the battery positive (+) terminal as
possible with an ampere rating; not to exceed total value of fuses in Amp.

(3) Remote Turn-On Input: To remote turn-on output of Car Stereo
This Amplifier is turned "ON" remotely when the vehicle's stereo is turned "ON".

TE :

NO

IF YOUR RADIO DOES NOT HAVE A +12 VOLT OUTPUT LEAD WHEN THE RADIO IS TURNED ON, THE "REMOTE"
TERMINAL ON THE AMPLIFIER CAN BE CONNECTED TO VEHICLE'S ACCESSORY CIRCUIT THAT IS LIVE WHEN THE KEY
IS "ON".

P

ANEL LAYOUT

HTG157 FRONT VIEW

HTG237 / HTG257 FRONT VIEW

19

1 9 2 4 4 6 8

2 6 843

HTG2100D FRONT VIEW

HTG447 FRONT VIEW

1 9 2 3 5 5 6 7 8

1 12 24 44 46 6 8

P

ANEL LAYOUT

HTG157 REAR VIEW

10 11

HTG237 / HTG257 REAR VIEW

10 11 12 13 14

12

13

14

HTG2100D REAR VIEW

HTG447 REAR VIEW

11 12 13

10

10 11 12 13

14

14

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ONTROL FUNCTIONS

1.

RCA input jacks
These RCA input jacks are for use with source units that have RCA or Line level
outputs. A source unit with a minimum level of 200mV is required for proper operation.
The use of high quality twisted pair cables is recommended to decrease the possibility
of radiated noise entering the system.

2. GAIN Control
The level control will match the amplifiers sensitivity to the source units signal voltage.
The Operating range is 200mV minimum to 6V maximum.

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AUTION: Do not run the amplifier in high volume for long time, otherwise the loudspeakers will be damaged.

SUBSONIC

3.
HTG157:The frequency can be adjusted between 0Hz and 80Hz.
HTG2100D:The frequency can be adjusted between 10Hz and 60Hz.

4. X-OVER
* Full pass x-over switch
When the switch is in the “Full” position, the full range is bypassed.
* Low pass x-over switch
When the switch is in the “LPF” position, frequencies lower than the low pass frequency
setting are passed.
HTG157/HTG237/HTG257/HTG447 : The frequency can be adjusted between 50Hz and 250Hz.
* High pass x-over switch
When the switch is in the “HPF” position, frequencies higher than the high pass
frequency setting are passed.
HTG237/HTG257/HTG447 : The frequency is 80Hz.

5. Low pass x-over frequency control
This control is used to select the desired low pass x-over frequency.
The frequency can be adjusted between 50Hz and 250Hz.

6. Bass BOOST
HTG237/HTG257/HTG2100D : The boost can be adjusted between 0dB to12dB.
HTG157/HTG447 : The boost can be selected among 0dB, 6dB and 12dB.

7. REMOTE
Controls the subwoofer amplifier gain, from a remote location for ease of adjustment
during listening.

arning: Do not connect a level control knob from other manufacturers to the Remote Sub Level

W
Control of any amplifier. Even though the connectors fit properly, the control knob and connector
pin positions may be different and the amplifier will be damaged.

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ONTROL FUNCTIONS

LED

8.
Will illuminate GREEN to indicate the amplifier is on and operating normally, and will
be illuminated RED if the amplifier shuts down due to short circuit, DC offset, or
overheating detected by on board protection circuitry

9. Auxiliary outputs
The Auxiliary outputs offer HERTIAGE amplifiers easy, unlimited system expansion.
Route RCA’s from the line out of the first amplifier to the line input of a second
amplifier when using a single source output.

10. GND
Connect this terminal directly to the sheet metal chassis of the vehicle, using the
shortest wire necessary to make this connection. Always use wire of the same gauge
or larger than the (+)12 volt power wire. The chassis connection point should be
scraped free of paint and dirt. Use only quality crimped and/or soldered connectors
at both ends of this wire.

arning : Do not connect this terminal directly to the vehicle battery ground terminal or any other factory

W

ground points.

11.

Remote Turn On
This terminal turns on the amplifier when (+)12 volt is applied to it. Connect it to the
remote turn on lead of the head unit or signal source.

12 . (+)12 Volt Power
Connect this terminal through a FUSE or CIRCUIT BREAKER to the positive terminal of
the vehicle battery or the positive terminal of an isolated audio system battery.

W

arning: Always protect this power wire by installing a fuse or circuit breaker of the appropriate

size within 12 inches of the battery terminal connection.

FUSE

13.
These fuses protect the amplifier against internal electrical damage and are meant to
protect the amplifier only. All other power connections should be fused at the source.

14. SPEAKERS
Connect subwoofers to these terminals.

ystem Diagrams

S

MONO Channel S

HTG157

ystem Design #1

HT

G2100D

2-4

2-4