Back Plate
The back plate (sometimes referred to as the bottom plate) is a stationary component of a driver’s motor assembly that works in conjunction with the voice coil and magnet to convert electrical signals into sound waves. Typically made from a ferromagnetic material (such as iron or steel), the back plate is mounted behind the voice coil and is usually a flat or slightly concave structure with a central opening through which the voice coil passes. The primary function of the back plate is to provide a return path for the magnetic flux generated by the permanent magnet; it is engineered to provide a uniform and consistent magnetic field distribution, optimizing the driver’s performance and minimizing distortion. Additionally, the back plate may incorporate several other elements to optimize driver performance, including cooling features such as vented openings or heatsinks to dissipate heat generated by the voice coil. Some drivers may integrate pole pieces or additional magnets to further enhance and control the magnetic field.
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Exploring Common DIY Terminology - Back Plate
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Created by:
technodanvan
- Published: 31 July 2023, 15:00 Monday
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Latest Articles
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by technodanvanSuspension
The suspension refers to the mechanical system that provides support and control for the diaphragm (cone/dome) and voice coil within the driver's magnetic structure. The suspension is an important component that allows the diaphragm to move back and forth in response to the electrical audio signal while maintaining stability and linearity. The suspension system typically consists of two key components: the spider and the surround.- Spider: The spider, also known as the "speaker
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Channel: Terminology
26 July 2023, 08:28 Wednesday -
by technodanvanSurround
In the context of loudspeaker drivers, the surround, also known as the "speaker surround" or "suspension surround," is a component that plays an important role in the driver's suspension system. The surround is typically a flexible ring or membrane that connects the outer edge of the loudspeaker diaphragm (cone/dome) to the driver's frame (basket). The primary function of the surround is to provide a compliant and flexible suspension for the diaphragm, allowing...-
Channel: Terminology
26 July 2023, 08:17 Wednesday -
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by technodanvanSpider
In the context of loudspeaker drivers, the spider refers to a component that plays an important role in the suspension system of the driver. The spider is an essential part of the driver's overall mechanical structure, helping to center and control the movement of the voice coil and diaphragm within the magnetic gap. The spider is typically located between the voice coil and the frame (basket) of the loudspeaker driver. It is made of a flexible material, such as cloth or treated...-
Channel: Terminology
26 July 2023, 08:06 Wednesday -
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by technodanvanSoundstage
Soundstage refers to the perceived spatial placement and localization of sound sources in a recording. It describes the three-dimensional presentation of audio, making it seem as if the sound is originating from specific locations within the listening environment, rather than coming directly from the loudspeakers. When a recording and playback system is capable of creating a convincing soundstage, listeners can experience a more immersive and realistic audio experience. The...-
Channel: Terminology
26 July 2023, 07:58 Wednesday -
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by technodanvanSINAD (Signal to Noise and Distortion ratio)
While not directly applicable to loudspeaker design, SINAD is a term in common use and is a valuable tool when comparing electronic equipment to match with your speakers. It can also be used when deciding what equipment you'd like to use for your measurement setup. SINAD stands for "Signal-to-Noise and Distortion ratio." It is a metric used to quantify the audio quality of electronic devices, particularly audio equipment like amplifiers...-
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26 July 2023, 07:41 Wednesday -
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by technodanvanSignal-to-Noise Ratio (SNR)
The signal-to-noise ratio (SNR) is an important parameter that helps evaluate the performance and quality of the audio output. In the context of audio, SNR refers specifically to the ratio of the desired audio signal (the sound produced by the loudspeaker driver) to the background noise generated by the speaker itself or the overall system.
The formula to calculate SNR in decibels is:...
SNR (dB) = 10⋅log10(PowerSignal/PowerNoise)-
Channel: Terminology
25 July 2023, 15:20 Tuesday -