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• Intelligent Surface Mount Technology
•
Patented PWM MOSFET Switching Power Supply (#5,598,325)
•
Adaptive Class D Technology
•
High Powered Transformer
•
High Powered stacked inductor
• Pure N-Channel Design
•
Doubles power into 2 ohms
•
Real Time Computerized Protection Circuit
•
Color-coded wire harness for speaker-level input installation on Thunder4250D and 6500D
• Smart-Engage™ auto turn on for easy integration with factory head units Thunder4250D and 6500D
•
Acoustically Seamless Turn-on/Turn-off (i.e. no noise)
•
Variable frequency low-pass crossover, 40Hz to 200Hz, 24dB/octave low pass
•
Defeatable compression circuit included on Thunder6500D and Thunder81000D
•
Continuously adjustable and defeatable Bass EQ enhancement circuitry, centered at 40Hz
•
Low level inputs
•
EBC - External Bass Control Port with an additional 3dB of gain when used, and 23dB attenuation
•
Adjustable input sensitivity
•
Buffered RCA Outputs for daisy-chaining additional bass amplifiers
• Nickel-plated, heavy duty terminal block type connectors
• Unique rubber Insulated Iso-Feet™
THUNDER4250D
RMS Power measured at 12.5 Volts DC:
125 Watts x 1 into a 4 Ohm load with less than 1% Thd+N
250 Watts x 1 into a 2 Ohm load with less than 1% Thd+N
Dynamic Power measured at 14.4 Volts DC
200 Watts x 1 into a 4 Ohm load
350 Watts x 1 into a 2 Ohm load
Signal to Noise Ratio: ≥100dB A-Weighted
Damping Factor: >200
Frequency Response: 20Hz-200Hz
Maximum Input: 8Vrms
Thunder EQ: Variable Bass Boost (0-18dB) centered at 40Hz
Crossover: Variable 40Hz to 200Hz, 24dB/octave low pass
Dimensions: 7" x 9.75" x 2" (17.8cm x 24.8cm x 5.1cm)
9.9" x 9.75" x 2.1" (23.6cm x 24.8cm x 5.3cm) Including IsoFeet™
THUNDER6500D
RMS Power measured at 12.5 Volts DC:
250 Watts x 1 into a 4 Ohm load with less than 1% Thd+N
500 Watts x 1 into a 2 Ohm load with less than 1% Thd+N
Dynamic Power measured at 14.4 Volts DC
450 Watts x 1 into a 4 Ohm load
775 Watts x 1 into a 2 Ohm load
Signal to Noise Ratio: ≥100dB A-Weighted
Damping Factor: >200
Frequency Response: 20Hz-200Hz
Maximum Input: 8Vrms
Thunder EQ: Variable Bass Boost (0-18dB) centered at 40Hz
Crossover: Variable 40Hz to 200Hz, 24dB/octave low pass
Dimensions: 11.5" x 9.75" x 2" (29.2cm x 24.8cm x 5.1cm)
13.9" x 9.75" x 2.1" (36.6cm x 24.8cm x 5.3cm) Including IsoFeet™
Features
Specifications
THUNDER81000D
RMS Power measured at 12.5 Volts DC:
500 Watts x 1 into a 4 Ohm load with less than 2% Thd+N
1000 Watts x 1 into a 2 Ohm load with less than 2% Thd+N
Dynamic Power measured at 14.4 Volts DC
850 Watts x 1 into a 4 Ohm load
1500 Watts x 1 into a 2 Ohm load
Signal to Noise Ratio: ≥100dB A-Weighted
Damping Factor: >100
Frequency Response: 20Hz-200Hz
Maximum Input: 8Vrms
Thunder EQ: Variable Bass Boost (0-18dB) centered at 40Hz
Crossover: Variable 40Hz to 200Hz, 24dB/octave low pass
Dimensions:15.4" x 9.75" x 2".(40.1cm x 24.8cm x 5.1cm)
17.8" x 9.75" x 2.1" (45.2cm x 24.8cm x 5.3cm) Including IsoFeet™
Recommended Fuse = 150A
CONGRATULATIONS...
on your purchase of a new MTX Audio
Thunder Amplifier! MTX has long been
the industry leader in mobile enclosures
and speakers, and we have reached
new heights with the development of the
new MTX Thunder amplifiers. You
couldn’t have chosen a more reliable,
powerful, or better performing amplifier.
In fact, we back up every Thunder
amplifier with a three-year warranty if
installed by an authorized MTX Audio
retailer (see the warranty statement.
Your new MTX Thunder amplifier was
designed, built and thoroughly tested at our
state-of-the-art electronics manufacturing
facility in Phoenix, Arizona. We manufacture
every amplifier using the latest Intelligent
Surface Mount Technology. Some of the
advantages of the new design are its signifi-
cant improvements to the amplifier’s electrical
and mechanical properties. ISMT devices
feature substantially shorter internal and
external lead lengths. This reduces stray
capacitance and inductance, which results in
cleaner and more accurate musical reproduc-
tion with significantly less noise interference.
The ISMT mounter produces amplifier boards
with smaller and lighter components, which
are more resistant to vibrations inherent in the
automotive environment.
A word about power ratings. It is important for you
to know how they stack up. MTX has chosen the
most honest, most conservative way to rate our
amps. We show you the RMS power, at 12.5 volts,
and dynamic power at 14.4 volts. However, we go
above and beyond the call of duty. We test each
amplifier. The technician records the “actual”
power output, and records this number on your
Certified Performance Certificate. The amplifier
must meet or exceed the rated specification
before we’ll ship it. No questions. No exceptions.
We want to ensure you get continuous high
performance from your MTX Thunder
amplifier, so we recommend that you have it
professionally installed by your authorized
MTX dealer.
HOW TO USE THIS MANUAL
If you are installing this amplifier yourself, we
recommend that you read the manual cover-
to-cover before you install it. Familiarize
yourself with the features and details on the
input and output panels. Make sure you have
all the equipment you need. Then follow the
step-by-step installation instructions included.
Sample installation diagrams may be found
on our website:
mtx.com
If you have any questions, write or call us:
MTX Audio
4545 E. Baseline Rd. Phoenix, AZ 85042
602-438-4545 • 800-CALL MTX
technical@mtx.com
mtx.com
Please take a moment to register your
purchase on line at mtx.com.
Please also record the serial number of
your amplifier in the space provided below
and keep this manual for future reference,
as well as your sales receipt as proof of
ownership. (The serial number of your
amplifier is marked on the bottom of its
metal chassis.)
Serial Number:
Date of Purchase:
Introduction
ENGLISH