Crossover Schematic

The following is a low-pass crossover circuit engineered specifically for the 6.5LF. The low-pass filter has a 12dB/octave slope with a crossover point of 300Hz. This is very useful when added to systems that are lacking low frequency output. Additionally, it may be used in vehicles that tend to absorb and attenuate mid-bass fre- quencies. This is a common situation in passenger cars whose doors basically act as "bass traps."

WARNING: This circuit is designed for a single 6.5LF woofer. Two such circuits and woofers are required for a stereo system. The impedance of the driver is a critical part of the completed circuit and each circuit must be wired to only one woofer. If multiple woofers are desired, multiple crossover circuits need to be installed.

Crossover Components

It is important to maintain the component values listed in the parts list. The inductor in the circuit (L1) has a steel laminate core, and a very low DC resistance of 0.22 ohms. This low DC resistance is critical for maintaining the sonic detail in the low frequencies, and to avoid compromising the damping factor of the amplifier. The damping factor is the ratio of the input impedance of the speaker over the combined impedance of the output devices in the ampli- fier and any resistance in the signal path between the amplifier and the speaker.

Part: Description:

L1 3.3mH Inductor, 0.22Ω DC Resisitance Steel Laminate Core

C1 80μƒ Non-polar Audio Capacitor

50V Working Voltage

Performance:

This circuit reinforces output below 300Hz in the system to which it is added. The amount of increase depends on the other speakers in the circuit, as well as the amplifier(s) powering the speakers. If this driver and circuit are added to an existing ProSeries 6.5 or 6.53 system with an additional amplifier of the same model, and increase of 6dB is possible. If this driver and circuit are added to the same amplifier powering the existing system, it is important that the amplifier be capable of driving a 2-ohm impedance. Many high performance amplifiers are capable of doubling their power at 2 ohms. In these cases, a 6dB increase will be realized. If the amplifier does not double its power at 2 ohms, a smaller increase in output will result.

Specification:

6.5LF Woofer

Nominal Size

61/2-inches (165mm)

Recommended Amplifier Power

20–500 watts

 

 

Nominal Impedance

3 ohms

Mounting Cutout Diameter

5-inches (127mm)

Mounting Depth

23/8-inches (60mm)

Specification:Crossover

Crossover Frequency (-3dB down) 300Hz

Crossover Slope

12dB/octave

300 Jubilee Drive Peabody, MA 01960 978-538-5000 Fax: 978-538-5199

Specifications subject to change without notice. Boston, and Boston Acoustics are registered

trademarks of Boston Acoustics ©1999 Boston Acoustics, Inc.

Page 1
Page 2
Image 2
Boston Acoustics 6.5LF manual Crossover Schematic, Crossover Components, Performance, Specification 5LF Woofer
Page 1

6.5LF specifications

Boston Acoustics has built a strong reputation in the audio industry, particularly for delivering high-quality speakers that enhance the listening experience. One of their standout offerings is the 6.5LF, a 6.5-inch low-frequency driver designed for various audio applications, including home theaters, music systems, and professional audio setups. The Boston Acoustics 6.5LF is engineered to deliver powerful bass response and articulate sound, making it a popular choice among audiophiles and casual listeners alike.

The main features of the 6.5LF include its robust construction, high sensitivity, and advanced cone materials. The driver is designed to produce deep, rich low frequencies without sacrificing clarity or detail. With a sensitivity rating that allows it to deliver impactful sound even with lower wattage, the 6.5LF is adaptable to various amplifiers and setups, making it a versatile option for users who seek both performance and efficiency.

One of the standout technologies employed in the Boston Acoustics 6.5LF is the advanced cone geometry. The unique design allows for better diaphragm control, which minimizes distortion and enhances the overall sound quality. This feature ensures that listeners enjoy a more accurate representation of their favorite music tracks or movies, with bass notes that remain tight and punchy.

The surround technology used in the 6.5LF is also noteworthy. Boston Acoustics incorporates high-quality materials that promote a linear suspension and smooth motion of the cone. This design reduces unwanted resonances and increases the driver's overall lifespan. The result is an extended bass response that can seamlessly integrate with other audio components.

In terms of installation, the 6.5LF offers flexibility. It can be used in various enclosures, whether sealed or ported, allowing users to tailor their audio setup based on their preferences and room acoustics. This adaptability makes the 6.5LF an excellent choice for DIY audiophiles looking to create their custom speaker systems.

Overall, the Boston Acoustics 6.5LF stands out in its category due to its combination of innovative design, superior materials, and impressive sound quality. Whether used in a professional setting or a home audio system, this low-frequency driver continues to provide an exceptional listening experience that meets the demands of today's audio enthusiasts. Its reliable performance and user-friendly characteristics make it a solid investment for anyone seeking to elevate their sound experience.
Top Page Image Contents