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Crossfire BMF600D - User Manual

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FEATURES
FEATURES
Class "D" Technology
Fully 1 Ohm Stable Operation
Military Spec Audiophile Grade Components
High Efficiency PWM Power Supply
-Multi-stranded power torroid
-Oversized torroidial core
MOSFET Input and Output Transistors
Oversized Capacitor Banks
Discrete Mount Power and Speaker Terminals
Variable Lowpass Electronic Crossover
Variable Subsonic Filter
RCA Preamp Output
-Variable HP/LP/Full crossover
Built in Bridging Module
-Master / Slave Selector
-0/180 Phase Selector
5 Way Protection Circuitry
Soft Remote On/Off Circuitry
Digital Subwoofer Level Control
Two Year Limited Warranty
MODEL: BMF1000D BMF600D
RMS Power / 4 ohms @ 0.08% T.H.D.
250W x 1
150W x 1
2 ohms @ 0.4% T.H.D. 500W x 1 300W x 1
1 ohm @ 1 % T.H.D. 1000W x 1 600W x 1
Efficiency / Typical 86% 86%
Worst Case 72% 72%
Bandwidth + 3dB 10Hz 250Hz 10Hz 250Hz
Signal To Noise >90dB >90dB
Damping Factor 200 200
Input Sensitivity 240 mV 6V 240mV 6V
Input Impedance 20K ohms 20k ohms
Circuit Breaker / fuse 120 Amp 60 Am p
Dimensions 9.3W x 2.1H x 13L 9.3W x 2.1H x
10.5L
CROSSOVER
Low Pass Variable 50 250Hz
X-Over Slope 12dB
Variable Subsonic Filter Variable 20 - 50Hz @ 12dB
Preamp Crossover Variable 50 250Hz
Preamp output
All specifications are with 12.5 volts DC. Typical output with 14.4 volts DC is 20% higher.
SPECIFICATIONS
SPECIFICATIONS
BMF CLASS D AMPLIFIERS
BMF CLASS D AMPLIFIERS
The quality of installation may affect the performance and reliability of your Crossfire product. If you have any doubts or questions regarding installation, you may
wish to contact your authorized Crossfire dealer. Remember to follow all wire and fuse requirements suggested in this manual. Warranty may void if proper
installation technique is not used.
IMPORTANT
IMPORTANT
Please read all instructions before installation!
Please read all instructions before installation!
OPERATION
OPERATION
Both the Crossfire BMF1000D and BMF600D are single channel, dedicated subwoofer amplifiers. Unlike other Crossfire BMF amplifiers, both these amplifiers operate
as a single channel, therefore one amplifier cannot be bridged by itself. Do not be fooled by the two sets of speaker outputs. Two outputs are provided strictly for
convenience and are paralleled internally on the circuit board of the amplifier. This means that if both outputs are used with one driver each, the amplifier sees the
same load as if the same two drivers are connected to only one output terminal.
+
+
-
SPEAKER
POWER
+12 REM
GND
PWR
PRT
-
--
++
4 ohm subwoofer 4 ohm subwoofer
In both diagrams, the
amplifier sees a 2 ohm load
+
+
-
SPEAKER
POWER
+12 REM
GND
PWR
PRT
-
--
++
4 ohm subwoofer 4 ohm subwoofer
BMF D AMPS
Question and Answer IconNeed help?

Do you have a question about the Crossfire BMF600D and is the answer not in the manual?

Summary

Features

Class D Technology

Describes the core technology of the amplifiers, highlighting efficiency and sound quality.

Fully 1 Ohm Stable Operation

Indicates the amplifier's capability to operate reliably at a 1 Ohm impedance load.

Military Spec Audiophile Grade Components

Highlights the use of high-quality, durable components for superior performance and reliability.

High Efficiency PWM Power Supply

Details the advanced power supply design for optimal energy conversion and reduced heat.

Multi-stranded power torroid

Refers to the construction of the toroidal transformer for efficient power delivery.

Oversized torroidial core

Emphasizes the use of a larger toroidal core for improved power handling and stability.

MOSFET Input and Output Transistors

Specifies the use of MOSFET technology for high performance and switching speed.

Oversized Capacitor Banks

Highlights the presence of large capacitors for stable voltage and improved bass response.

Discrete Mount Power and Speaker Terminals

Notes the use of separate, robust terminals for power and speaker connections.

Variable Lowpass Electronic Crossover

Allows adjustable low-pass filtering for subwoofers, typically 50-250Hz.

Variable Subsonic Filter

Enables adjustable subsonic filtering to remove ultra-low frequencies and protect the subwoofer.

RCA Preamp Output

Provides line-level outputs for connecting additional amplifiers or processors.

Variable HP;LP;Full crossover

Offers flexible crossover control (High-Pass, Low-Pass, Full Range) for various speaker configurations.

Built in Bridging Module

Allows two amplifiers to be linked together for increased power output.

Master; Slave Selector

Enables setting amplifier roles for bridging or system expansion.

0;180 Phase Selector

Allows adjustment of subwoofer phase to optimize bass response.

5 Way Protection Circuitry

Details built-in protection against thermal, DC offset, short circuit, overload, and reverse polarity.

Soft Remote On;Off Circuitry

Ensures gradual power-on and power-off to prevent "pops" or damage to speakers.

Digital Subwoofer Level Control

Provides remote control for adjusting subwoofer volume independently.

Two Year Limited Warranty

States the duration and type of warranty coverage for the product.

Specifications

RMS Power

Lists the amplifier's continuous power output ratings at different impedance levels and distortion.

Efficiency; Typical

Indicates the amplifier's efficiency percentage under typical operating conditions.

Worst Case

Specifies the amplifier's efficiency under less ideal or maximum load conditions.

Bandwidth +3 dB

Defines the frequency range over which the amplifier maintains its rated power output.

Signal To Noise

Measures the ratio of signal power to noise power, indicating audio clarity.

Damping Factor

Indicates the amplifier's control over the speaker cone's movement for improved accuracy.

Input Sensitivity

Specifies the minimum input voltage required for full power output.

Input Impedance

Defines the electrical resistance presented by the amplifier's input.

Circuit Breaker; fuse

Lists the fuse or circuit breaker rating for system protection.

Dimensions

Provides the physical size (Width x Height x Length) of the amplifier unit.

Crossover

Details the crossover filter types and settings available for audio signal management.

X-Over Slope

Specifies the steepness of the crossover filter's attenuation, typically 12dB/octave.

Variable Subsonic Filter

Allows adjustable subsonic filtering (e.g., 20-50Hz at 12dB) to remove unwanted low frequencies.

Preamp Crossover

Refers to the adjustable crossover settings within the pre-amplifier stage.

Preamp output

Indicates the availability of preamp outputs for connecting other audio components.

Operation

Amplifier Functionality

Explains that these are single-channel subwoofer amplifiers and how speaker outputs are paralleled.

Speaker Load Diagrams

Illustrates how the amplifier sees a 2 ohm load when two 4 ohm subwoofers are connected.

Mounting

Proper Mounting Importance

Stresses the significance of mounting location for amplifier longevity and performance.

Heat Dissipation

Advises on ensuring adequate airflow and clearance (2.5 inches) for effective heat dissipation.

Mounting Hole Preparation

Recommends pre-drilling mounting holes with a 1/8" or 3mm bit to prevent damage.

Area Inspection

Warns to check the mounting area for wires, vacuum lines, or brake/fuel lines before drilling.

Power Connections

Voltage Requirements

Specifies the operational voltage range (10.5-16V DC) and recommends checking vehicle electrical system.

Voltage Check Procedure

Details how to check battery voltage with ignition off and engine running for proper supply.

Power Wire & Fuse

Wire Gauge and Fuse Recommendations

Provides recommended wire gauge (4awg/8awg) and fuse (100A/60A) based on amplifier model.

Power Wire Installation Rules

Outlines guidelines for running power wire, including using grommets and avoiding sharp edges.

Inline Fuse Placement

Instructs to install an inline fuse holder as close to the battery positive terminal as possible.

Ground

Ground Wire Connection

Specifies using the same gauge wire as power wire and connecting to a solid metal chassis point.

Ground Point Selection

Advises selecting a clean metal area, avoiding seat bolts, and preparing the surface for good contact.

High Power Ground Upgrade

Recommends upgrading the ground strap for multiple amplifiers to ensure sufficient current flow.

Remote Turn-On

Remote Turn-On Connection

Explains connecting the remote terminal to a switched +12V source, typically from the head unit.

Source Identification

Guides on finding the remote turn-on wire on aftermarket (blue/blue-white) and factory (power antenna) units.

Wire Gauge and Connection

Recommends using 18-gauge wire and connecting securely via barrel connector or soldering.

Speaker Outputs

Recommended Speaker Wire

Suggests using a minimum of high-quality 12 gauge speaker wire for optimal performance.

Speaker Wire Termination

Details stripping insulation and connecting wires to speakers using terminals or soldering.

Connecting the Wires

Wire Routing to Amplifier

Guides on routing power, ground, remote, and speaker wires to the amplifier location.

Wire Preparation

Instructs to cut wires to equal length, strip insulation, and insert into terminals securely.

Polarity Check

Emphasizes checking correct polarity for power and speaker wires to prevent damage.

Signal Inputs

Signal Cable Requirements

Stresses the importance of using proper signal cables for a clear audio signal from the source unit.

RCA Cable Quality

Recommends using higher quality RCA cables with better shielding for noise rejection.

Line Level Inputs

Avoiding Noise Interference

Advises routing RCA cables away from power wires, large wire looms, and electric fans to prevent noise.

RCA Receptacle Connection

Explains connecting RCA cables to the "LOW IN" receptacles, maintaining left/right balance.

Peamp Features

Lowpass Crossover

Details the variable low-pass filter (50-250Hz) for subwoofers and blending with midrange.

Subsonic Filter

Explains the selectable (ON/OFF) and variable (20-50Hz) subsonic filter for noise reduction.

Remote Level Control

Describes the optional digital remote control for adjusting amplifier output level from the driver's seat.

Line Level Outputs

Covers buffered line-level outputs for linking multiple amplifiers and electronic crossover.

Bridging Circuit (Invert Output)

Bridging Functionality

Explains bridging two amplifiers for double output, requiring minimum 2ohm impedance.

Master;Slave Control Settings

Details the three settings (Master 0, Master 180, Slave) for amplifier communication and control.

Bridging Wiring Diagram

Provides a visual guide for correctly connecting two amplifiers in a bridged configuration.

Gain Control

Gain Adjustment Procedure

Outlines a three-step process to match amplifier input level to source unit output without distortion.

Gain vs. Volume Knob

Warns that gain control is not a volume knob and improper use can damage speakers or amplifier.

Power and Protection

LED Indicators

Explains the function of the Green (Power ON) and Red (Protection Mode) LEDs on the amplifier.

Protection Mode Explanation

Indicates that the Red LED signifies a problem requiring system troubleshooting.

System Examples

Two-Way System Example

Illustrates wiring for a two-way system with subwoofer and satellite speakers.

Multi-Subwoofer System Example

Demonstrates wiring configurations for systems with multiple subwoofers.

Summary

Features

Class D Technology

Describes the core technology of the amplifiers, highlighting efficiency and sound quality.

Fully 1 Ohm Stable Operation

Indicates the amplifier's capability to operate reliably at a 1 Ohm impedance load.

Military Spec Audiophile Grade Components

Highlights the use of high-quality, durable components for superior performance and reliability.

High Efficiency PWM Power Supply

Details the advanced power supply design for optimal energy conversion and reduced heat.

Multi-stranded power torroid

Refers to the construction of the toroidal transformer for efficient power delivery.

Oversized torroidial core

Emphasizes the use of a larger toroidal core for improved power handling and stability.

MOSFET Input and Output Transistors

Specifies the use of MOSFET technology for high performance and switching speed.

Oversized Capacitor Banks

Highlights the presence of large capacitors for stable voltage and improved bass response.

Discrete Mount Power and Speaker Terminals

Notes the use of separate, robust terminals for power and speaker connections.

Variable Lowpass Electronic Crossover

Allows adjustable low-pass filtering for subwoofers, typically 50-250Hz.

Variable Subsonic Filter

Enables adjustable subsonic filtering to remove ultra-low frequencies and protect the subwoofer.

RCA Preamp Output

Provides line-level outputs for connecting additional amplifiers or processors.

Variable HP;LP;Full crossover

Offers flexible crossover control (High-Pass, Low-Pass, Full Range) for various speaker configurations.

Built in Bridging Module

Allows two amplifiers to be linked together for increased power output.

Master; Slave Selector

Enables setting amplifier roles for bridging or system expansion.

0;180 Phase Selector

Allows adjustment of subwoofer phase to optimize bass response.

5 Way Protection Circuitry

Details built-in protection against thermal, DC offset, short circuit, overload, and reverse polarity.

Soft Remote On;Off Circuitry

Ensures gradual power-on and power-off to prevent "pops" or damage to speakers.

Digital Subwoofer Level Control

Provides remote control for adjusting subwoofer volume independently.

Two Year Limited Warranty

States the duration and type of warranty coverage for the product.

Specifications

RMS Power

Lists the amplifier's continuous power output ratings at different impedance levels and distortion.

Efficiency; Typical

Indicates the amplifier's efficiency percentage under typical operating conditions.

Worst Case

Specifies the amplifier's efficiency under less ideal or maximum load conditions.

Bandwidth +3 dB

Defines the frequency range over which the amplifier maintains its rated power output.

Signal To Noise

Measures the ratio of signal power to noise power, indicating audio clarity.

Damping Factor

Indicates the amplifier's control over the speaker cone's movement for improved accuracy.

Input Sensitivity

Specifies the minimum input voltage required for full power output.

Input Impedance

Defines the electrical resistance presented by the amplifier's input.

Circuit Breaker; fuse

Lists the fuse or circuit breaker rating for system protection.

Dimensions

Provides the physical size (Width x Height x Length) of the amplifier unit.

Crossover

Details the crossover filter types and settings available for audio signal management.

X-Over Slope

Specifies the steepness of the crossover filter's attenuation, typically 12dB/octave.

Variable Subsonic Filter

Allows adjustable subsonic filtering (e.g., 20-50Hz at 12dB) to remove unwanted low frequencies.

Preamp Crossover

Refers to the adjustable crossover settings within the pre-amplifier stage.

Preamp output

Indicates the availability of preamp outputs for connecting other audio components.

Operation

Amplifier Functionality

Explains that these are single-channel subwoofer amplifiers and how speaker outputs are paralleled.

Speaker Load Diagrams

Illustrates how the amplifier sees a 2 ohm load when two 4 ohm subwoofers are connected.

Mounting

Proper Mounting Importance

Stresses the significance of mounting location for amplifier longevity and performance.

Heat Dissipation

Advises on ensuring adequate airflow and clearance (2.5 inches) for effective heat dissipation.

Mounting Hole Preparation

Recommends pre-drilling mounting holes with a 1/8" or 3mm bit to prevent damage.

Area Inspection

Warns to check the mounting area for wires, vacuum lines, or brake/fuel lines before drilling.

Power Connections

Voltage Requirements

Specifies the operational voltage range (10.5-16V DC) and recommends checking vehicle electrical system.

Voltage Check Procedure

Details how to check battery voltage with ignition off and engine running for proper supply.

Power Wire & Fuse

Wire Gauge and Fuse Recommendations

Provides recommended wire gauge (4awg/8awg) and fuse (100A/60A) based on amplifier model.

Power Wire Installation Rules

Outlines guidelines for running power wire, including using grommets and avoiding sharp edges.

Inline Fuse Placement

Instructs to install an inline fuse holder as close to the battery positive terminal as possible.

Ground

Ground Wire Connection

Specifies using the same gauge wire as power wire and connecting to a solid metal chassis point.

Ground Point Selection

Advises selecting a clean metal area, avoiding seat bolts, and preparing the surface for good contact.

High Power Ground Upgrade

Recommends upgrading the ground strap for multiple amplifiers to ensure sufficient current flow.

Remote Turn-On

Remote Turn-On Connection

Explains connecting the remote terminal to a switched +12V source, typically from the head unit.

Source Identification

Guides on finding the remote turn-on wire on aftermarket (blue/blue-white) and factory (power antenna) units.

Wire Gauge and Connection

Recommends using 18-gauge wire and connecting securely via barrel connector or soldering.

Speaker Outputs

Recommended Speaker Wire

Suggests using a minimum of high-quality 12 gauge speaker wire for optimal performance.

Speaker Wire Termination

Details stripping insulation and connecting wires to speakers using terminals or soldering.

Connecting the Wires

Wire Routing to Amplifier

Guides on routing power, ground, remote, and speaker wires to the amplifier location.

Wire Preparation

Instructs to cut wires to equal length, strip insulation, and insert into terminals securely.

Polarity Check

Emphasizes checking correct polarity for power and speaker wires to prevent damage.

Signal Inputs

Signal Cable Requirements

Stresses the importance of using proper signal cables for a clear audio signal from the source unit.

RCA Cable Quality

Recommends using higher quality RCA cables with better shielding for noise rejection.

Line Level Inputs

Avoiding Noise Interference

Advises routing RCA cables away from power wires, large wire looms, and electric fans to prevent noise.

RCA Receptacle Connection

Explains connecting RCA cables to the "LOW IN" receptacles, maintaining left/right balance.

Peamp Features

Lowpass Crossover

Details the variable low-pass filter (50-250Hz) for subwoofers and blending with midrange.

Subsonic Filter

Explains the selectable (ON/OFF) and variable (20-50Hz) subsonic filter for noise reduction.

Remote Level Control

Describes the optional digital remote control for adjusting amplifier output level from the driver's seat.

Line Level Outputs

Covers buffered line-level outputs for linking multiple amplifiers and electronic crossover.

Bridging Circuit (Invert Output)

Bridging Functionality

Explains bridging two amplifiers for double output, requiring minimum 2ohm impedance.

Master;Slave Control Settings

Details the three settings (Master 0, Master 180, Slave) for amplifier communication and control.

Bridging Wiring Diagram

Provides a visual guide for correctly connecting two amplifiers in a bridged configuration.

Gain Control

Gain Adjustment Procedure

Outlines a three-step process to match amplifier input level to source unit output without distortion.

Gain vs. Volume Knob

Warns that gain control is not a volume knob and improper use can damage speakers or amplifier.

Power and Protection

LED Indicators

Explains the function of the Green (Power ON) and Red (Protection Mode) LEDs on the amplifier.

Protection Mode Explanation

Indicates that the Red LED signifies a problem requiring system troubleshooting.

System Examples

Two-Way System Example

Illustrates wiring for a two-way system with subwoofer and satellite speakers.

Multi-Subwoofer System Example

Demonstrates wiring configurations for systems with multiple subwoofers.

Crossfire BMF600D Specifications

General IconGeneral
Channels1
Damping Factor>200
Subsonic Filter10 Hz - 50 Hz
RMS Power at 4 Ohms600W
RMS Power at 2 Ohms1000W
Input Sensitivity200mV - 6V
Low Pass Filter50 Hz - 180 Hz
Bass Boost0dB

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