SPL Dynamics MD-600.1, MD-1500.1, MD-60.4, MD-200.4, MD-400.2 Operating Instructions Manual

SPL DYNAMICS MD-series amplifiers provide high performance sound reinforcement
for your car audio equipment. Its versatility enables compatibility with optional
Equalizers, Active Crossovers and Digital Signal Processors in a customized system.
Its built-in very wide range bandpass crossovers allow you to make all the cut-offs of
a full active system with amplifier’s filters.

MD - series

www.spldynamics.fi

Class D Amplifier

To achieve optimum performance, it is highly recommended that you read this
Owners Manual before beginning installation. Check also our webpages to have
more information about different system configurations.

OPERATING INSTRUCTIONS

BEFORE OPERATING THE UNITS, PLEASE READ THIS MANUAL
THROUGHLY AND RETAIN IT FOR FUTURE REFERENCE

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MD-60.4
MD-200.4
MD-400.2

MD-600.1
MD-1500.1

INTRODUCTION

FERTURES

WARNING

2

• Variable LPF : 50Hz - 4KHz

• Variable HPF : 15Hz - 600Hz (x1),150Hz - 6KHz (x10)

• Frequency Multiplier Switch Control

• Bandpass Filters: LPF & HPF can be used at the same time

• Soft-On / Turn-Off Circuit

• Overheat and Short Circuit Protection

• MOS-FET Pulse Modulated Power Supply

• Automotive Style Protection Fuses

• Upright Easy Access Speaker and Power Terminals

• Power ON and Protection LED Indicator

2/4 Channel

• Variable LPF : 40Hz - 180Hz

• Variable Subsonic 17 - 50Hz

• Variable Bass Freq 30 - 80Hz

• Variable Phase Control 0-180 degrees

• Bass Boost Centered 0dB 6dB 12dB

• Remote Level Control

• Soft-On / Turn-Off Circuit

• Overheat and Short Circuit Protection

• MOS-FET Pulse Modulated Power Supply

• Upright Easy Access Speaker and Power Terminals

• Power ON and Protection LED Indicator

Mono

• Variable LPF : 50Hz - 4KHz

• Variable HPF : 15Hz - 600Hz (x1),150Hz - 6KHz (x10)

• Frequency Multiplier Switch Control

• Bandpass Filters: LPF & HPF can be used at the same time

• Soft-On / Turn-Off Circuit

• Overheat and Short Circuit Protection

• MOS-FET Pulse Modulated Power Supply

• Automotive Style Protection Fuses

• Upright Easy Access Speaker and Power Terminals

• Power ON and Protection LED Indicator

2/4 Channel

• Variable LPF : 40Hz - 180Hz

• Variable Subsonic 17 - 50Hz

• Variable Bass Freq 30 - 80Hz

• Variable Phase Control 0-180 degrees

• Bass Boost Centered 0dB 6dB 12dB

• Remote Level Control

• Soft-On / Turn-Off Circuit

• Overheat and Short Circuit Protection

• MOS-FET Pulse Modulated Power Supply

• Upright Easy Access Speaker and Power Terminals

• Power ON and Protection LED Indicator

Mono

High powered audio systems in a vehicle are capable of generating “Live Concert”
high levels of sound pressure. Continued exposure to excessively high volume sound
levels may cause hearing loss or damage. Also, operation of a motor vehicle while
listening to audio equipment at high volume levels may impair your ability to hear
external sounds such as; horns, warning signals, or emergency vehicles, thus
constituting to a potential traffic hazard. In the interest of safety, Consumer
Electronics recommends listening at lower volume levels while driving.

WIRING CO NNE CTIONS

a. Select a suitable location that is convenient for mounting. is
accessible for wiring,and has ample room for air circulation
and cooling.
b. Use the amplifier as a template to mark the mounting holes.
Remove the Amplifier and drill 4 holes. USE EXTREME CAUTION,
INSPECT UNDERNEATH SURFACE BEFORE DRILLING.
c. Secure the Amplifier using the screws provided.

A. CONNECTING THE POWER (Fig. 1)

CAUTION :
AS A PRECAUTION, IT IS ADVISABLE TO DISCONNECT THE VEHICLE’S BATTERY
BEFORE MAKING CONNECTION TO THE +12 VOLT SUPPLY WIRING.

50/33/20 mm2 depending from the model( Thicker if planning for additional
Amplifiers) wire is recommended for both the power and ground wires. 12 Gauge,
for the remote turn-on wire. Both types are available at most Mobile Audio Dealers
or Installation Shops.

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

NOTE:
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 Power Antenna output of Car Stereo This Amplifier is
turned “ON” remotely when the vehicle’s stereo is turned “ON”.

NOTE :
If your radio does not have a +12 Volt output lead when the radio is turned ON, the
“RMT” terminal on the Amplifier can be connected to vehicle’s accessory circuit that
is live when the key is “ON”.

MD - 60.4 : 40A x 1 MD - 200.4 : 35A x 3 MD - 400.2 : 35A x 3
MD -600.1 : 30A x 2 MD -1500.1 : NO

3 4

PLANNING YOUR SYSTEM

MOUNTING YOUR AMPLIFIER

Before beginning the installation, consider the following:
a. If you plan to expand your system by adding other components sometime in the
future, ensure adequate space is left, and cooling requirements are met.

b. There has to be pre-amp outputs on your headunit.
SPL Dynamics Class D amplifiers has been designed to accept only Low-Level
signal source. So there has to be pre-amp outputs on your headunit.

c. Are your components matched? The RMS power rating of your speakers must be
equal or greater than the amplifier’s. They also must be 1 - 8 Ohms impedance.
(This information is normally printed on the speaker magnet).

d. Consider both the length of your leads, and routing when determining the
mounting location. Pre-Amp Input Jacks require a length of high quality
shielded male to male RCA patch cord.

The mounting position of your Amplifier will have a great effect on its ability to
dissipate the heat generated during normal operation. It has an ample heat sink for
heat dissipation, and also designed with a thermal shut-down(for heat protection)
circuit, making it reasonably tolerant of mounting variations. Any configuration which
allows moving air to be directed over the cooling fins will improve heat dissipation
dramatically. DO NOT enclose the amplifier in a small box or cover it so that air
cannot flow around fins.

Temperatures in car trunks have been measured as high as 175 F(79.5 C) in the
summer time. Since the thermal shut-down point for the Amplifier is 185 F(85 C), it
is easy to see that it must be mounted for maximum cooling capability. To achieve
maximum advantage of convection air flow in an enclosed trunk, mount the amplifier
in a vertical position, on a vertical surface.

Cooling requirements are considerably relaxed when mounting inside the passenger
compartment since the driver will not

often allow temperatures to reach a critical
point. Floor mounting under the seat is usually satisfactory as long as there is at
least 1 inch(2cm) above the Amplifier’s fins for ventilation.

NOTE :
Use always low-level input if there is pre-amp outputs in your headunit.
Distortion level is considerably lower from pre-amp(Low Level) outputs.

Model : MD - 400.2

B. VARIABLE “LPF” LOW-PASS FILTER
MONO (40Hz-180Hz):
Low-Pass filter circuitry of SPL Dynamics Class D Amplifiers is always activated
because these models are designed only to subwoofer use. Low-Pass filter
allows frequencies below (40-180Hz) to be amplified.

2/4CH (50Hz-4KHz):
“12/24dB” activates the Low-Pass filter circuitry, thus allowing frequencies
below (50Hz-4KHz) to be amplified. You can use this filter as :

• Subwoofer Low-Pass filter

• Full-Active system’s Midbass Low-Pass filter

• Full-Active system’s Midrange Low-Pass filter

For normal full-range frequency speaker configuration, as component system with
passive crossover or coaxial speakers, set to “OFF”.

5 6

Model : MD-600.1

Model : MD - 1500.1

Fig. 1

Fig. 1

Model : MD-60.4

Model : MD - 200.4

Fig. 1

Fig. 1

Fig. 1

Wire routing is CRITICAL for NOISE FREE PERFORMANCE. Observe the following:

1. Always use high quality RCA type shielded cables.

2. Always use the shortest length possible. If the cable is too long.
make an “S” type loop(not a coiled loop) in the center of the
cable to take up any excess.

3. Never cut the shielded cable and re-splice it.

4. Never route any Amplifier input cables near or parallel to
speaker outputs, high energy ignition wires, or near computer
controlled ignition circuit units(Computer units may be found
behind or under the dash panel in late model cars).

This GREEN LED will illuminate when the amplifier is turned “ON”. If it fails to
illuminate, check the power connections to the Amplifier and fuses.

PROTECTION CIRCUIT
Should the Amplifier be “short circuited” overloaded or overheated. the protect
circuit will “shut-down” the Amplifier

CAUTION:
This Amplifier is designed to operate with a minimum load impedance of 1 Ohms in
single amplifier use or 2 Ohms in two amplifiers bridged configurations. Subjecting to
impedances lower than recommended, may constitute to potential damage to the
MOSFET power supply. Follow instructions on section “ WIRING CONNECTIONS”
for further information.

In order to achieve maximum signal-to-noise performance “LEVEL” control adjusts
the signal level from your headunit to match the Amplifier’s sensitivity.
IT IS NOT A VOLUME OR POWER CONTROL!!!

To adjust, proceed as follows:
a. Set input “LEVEL” control to “MIN”.
b. Turn your headunit’s volume to maximum level. If distortion is heard decrease
headunit’s volume until the sound is clear.
c. Turn the “LEVEL” control toward “MAX” in stages, until the onset of audible
distortion is heard. then decrease to level prior to the point of audible distortion

NOTE :
Not performing above adjustment procedure and/or simply setting “LEVEL” control
at or near “MAX” position, may induce electrical audio noise into the system or
break down of the amplifier because driving the amplifier to distortion.

POWER INDICATOR LED

INPUT SENSITIVITY (LEVEL)CONTROL (Flg.2)

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C. MONO: VARIABLE SUBSONIC FILTER (17-50Hz)
“ON” activates the Subsonic filter circuitry, thus allowing frequencies above
(17-50Hz) to be amplified.

D. 2/4CH: VARIABLE “HPF” HIGH-PASS FILTER (15Hz-600Hz / 150Hz-6KHz)
“12/24dB” activates the High-Pass filter circuitry, thus allowing frequencies above
(15Hz-600Hz / 150Hz-6KHz) to be amplified. You can use this filter as:

• Subwoofer Subsonic filter

• Coaxial speakers High-Pass filter

• Component system High-Pass filter

• Full-Active 4-way system’s Midbass High-Pass filter

• Full-Active 4-way system’s Midranges High-Pass filter

• Full-Active 3-way system’s Midranges High-Pass filter

• Full-Active system’s Tweeter High-Pass filter

12dB = filter slope 12dB/oct 24dB = filter slope 24dB/oct

NOTE:
We recommend to use High-Pass filter always when the amplifier’s channel is not
driving subwoofer, because full -range speakers can break down if subwoofer
frequencies are played with them.

BANDPASS FILTER
S-series amplifier’s LPF and HPF can be used at the same time so they can be used
as a bandpass filters. Bandpass Filters can be used for:

• Subwoofer

• Full-Active 4-way system’s Midbass

• Full-Active 4-way system’s Midranges

• Full-Active 3-way system’s Midranges

FULL-ACTIVE SYSTEM
In Full-Active 3-way system there is subwoofer(s), midranges and tweeters.
2/4 amplifier channels are needed to drive Full-Active 3-way system.
(MD-400.2 / MD-60.4 / MD-200.4)

In Full-Active 4-way system there is subwoofer(s), midbasses, midranges and tweeters.
2/4 amplifier channels are needed to drive Full-Active 4-way system.
(MD-400.2 / MD-60.4 / MD-200.4)

E. CONNECTING LOW LEVEL INPUTS (RCA jacks)
NOTE: DO NOT use in conjunction with High Level input wires.

Model : MD - 400.2

Model : MD - 600.1 / MD - 1500.1

CONNECTING THE SPEAKERS

Model : MD-600.1

SPEAKER
1~4 Ohm

Model : MD - 1500.1

SPEAKER
1~4 Ohm

9 10

Model : MD-60.4

Model : MD - 200.4

Fig. 2

Fig. 2

Fig. 2

Fig. 2

Model : MD-60.4

a. 4 Channel Mode

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

b. 3 Channel Mode

SPEAKER
2~8 Ohm

SPEAKER
4~8 Ohm

SPEAKER
2~8 Ohm

c. 2 Channel Mode

SPEAKER
4~8 Ohm

SPEAKER
4~8 Ohm

a. Stereo Mode

Model : MD - 400.2Model : MD - 400.2

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

b.Mono Mode

SPEAKER
4~8 Ohm

11 12

WARNINGS

Investigate the layout of your automobile throughly before drilling or cutting any
holes. Take care when you work near the gas tanks, lines, or hydraulic lines. and
electrical wiring. Don’t use power amplifier unmounted, Attach this system securely
to the automobile to prevent damage, particulary in the event of an accident. Don’t
mount this system so that the wire connections are unprotected or are subject to
pinching or damage from nearby objects, The +12VDC power wire must be fused
at the battery positive terminal connection. Before making or breaking power
connections at this system power terminals. Disconnect the +12V wire at the
battery end. Confirm your radio/cassette player and/or other equip is turned off
while connecting the input jacks and speaker terminals. If you need to replace the
power fuse, replace it only with a fuse identical to that supplied with the system.
Using a fuse of different type or rating may result in damage to this system which
isn’t covered by the warranty.

Model : MD - 200.4

a. 4 Channel Mode

b. 3 Channel Mode

c. 2 Channel Mode

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
4~8 Ohm

SPEAKER
2~8 Ohm

SPEAKER
4~8 Ohm

SPEAKER
4~8 Ohm

1413

NOTICE :

• DUE TO VARIABLE FACTORS, POWER RATING MARGIN OF ERROR ± 10%
IS ALLOWED.

• ALL POWER RATINGS ARE TESTED AT 14.4VDC

• WHEN VEHICLE’S ENGINE IS STOPPED ITS BATTERY’S VOLTAGE DROPS

NORMALLY LOWERING RATING INDICATED WITH THIS UNIT.

• WE FOLLOW A POLICY OF CONTINUOUS PRODUCT IMPROVEMENTS AND
MODIFICATIONS. DUE TO THIS REASON SPECIFICATIONS, WARRANTIES,
FEATURES, PRICES, CONFIGURATIONS AND AVAILABILITIES ARE WITH NO
GUARANTY AND SUBJECT TO CHANGE WITHOUT PRIOR NOTICE.

www.spldynamics.fi

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SPECIFICATION

SPECIFICATION

Total Channel @ 1 Ohms

85W x 4CH

60W x 4CH

0.2%

10Hz-20KHz

50Hz-4KHz

15Hz-600Hz

150Hz-6KHz

0.2mV-6V

20K Ohms

40A x 1

170x53x198mm

300W x 4CH

200W x 4CH

600W x 2CH

0.2%

10Hz-20KHz

50Hz-4KHz

15Hz-600Hz

150Hz-6KHz

0.2mV-6V

20K Ohms

35A x 3

170x53x312mm

600W x 2CH

400W x 2CH

1150W x 1CH

0.2%

10Hz-20KHz

50Hz-4KHz

15Hz-600Hz

150Hz-6KHz

0.2mV-6V

20K Ohms

35A x 3

170x53x312mm

420W x 1CH

300W x 1CH 600W x 1CH

610W x 1CH

0.2%

10Hz-160KHz

17Hz-50Hz

0-180 Degree

40Hz-180Hz

150mV-6V

20K Ohms

30A x 2

170x53x282mm

1000W x 1CH

1600W x 1CH

0.2%

10Hz-160KHz

17Hz-50Hz

0-180 Degree

40Hz-180Hz

150mV-6V

20K Ohms

20K Ohms 20K Ohms 20K Ohms 20K Ohms 20K Ohms

170x53x392mm

Total Channel @ 2 Ohms

Total Channel @ 4 Ohms

THD @ 1 Ohms

170W x 2CHBridge Power @ 4 Ohms

Frequancy Respones ± 1.0dB

55dB 55dB 55dBChannel Separation

Subsonic Filter

Phase Control

LPF: Low Pass Filter

HPF: High Pass Filter(x1)

HPF: High Pass Filter(x10)

Adjustment Sensitivity Range

Input Impedance

Low Level

Fuse

Dimensions (W x H x D)mm

MD-60.4 MD-200.4 MD-400.2 MD-600.1 MD-1500.1

15