Parts
Microphones and stands therefor; loudspeakers, whether or not mounted in their enclosures; headphones and earphones, whether or not combined with a microphone, and sets consisting of a microphone and one or more loudspeakers; audio-frequency electric amplifiers; electric sound amplifier sets. > Parts > Parts
Duty Rate (from China)
Subheadings
Products classified under Tariff item 8518.90.00
Adtran Channel Bank Repeater Module
This line repeater module is designed for Adtran channel banks and contains SLIC, framer, and jitter attenuation circuits. It functions as a part of audio-frequency electric amplifiers used in telecommunications, specifically supporting 24-channel T1 with SF/ESF signaling. As a component dedicated to the operation of repeater equipment, it is classified under the parts provision of this tariff item.
AKG C414 Microphone PCB Assembly
The main circuit board assembly for AKG C414 condenser microphone, including impedance converter and pattern switching. It is the electronic heart of a studio microphone.
Analog Handset Carbon Microphone Cartridge
A replaceable carbon microphone cartridge designed for classic analog line telephone handsets. It converts voice to electrical signals using carbon granules and is built for easy insertion into handset microphone housings.
Analog Repeater Voice Frequency Filter Module
This module contains band-pass filters and microphone interface circuits for analog line repeaters, ensuring voice signals stay within the 300-3400 Hz telephony band. It is a dedicated component of repeater equipment. As a part of audio-frequency electric amplifiers used in repeaters, it is classified under the parts provision of this tariff item.
Audio-Technica AT2020 Microphone Shock Mount
An elastic suspension shock mount for the Audio-Technica AT2020 condenser microphone, isolating vibrations to prevent noise. It is a mechanical accessory that functions as a part of a microphone. This product is classified under 8518.90.00 as a part of microphones and their stands.
Avaya Analog Handset Printed Circuit
This printed circuit assembly is an analog handset PCB from Avaya, featuring a sidetone network, DTMF generator, and hookswitch interface. It is specifically designed for traditional POTS line telephones and includes surge protection. As a part dedicated to telephone handsets, it falls under the parts provision of this tariff item.
Beyerdynamic DT770 Headphone Driver Unit
A Tesla technology driver unit for Beyerdynamic DT770 closed-back headphones, including the diaphragm and magnet system. It is an essential electro-acoustic transducer part of headphones. This product is classified under 8518.90.00 as a part of headphones and earphones.
Bose L1 Pro Speaker Amplifier Module
A Class-D amplifier module for the Bose L1 Pro portable line array speaker system, containing the power stage and protection circuitry. It is a component part of a loudspeaker system. This product is classified under 8518.90.00 as a part of loudspeakers.
Boundary Layer Microphone Preamplifier PCA
A low-profile printed circuit assembly for boundary layer microphones used in conference tables. It provides phase-coherent amplification from surface-mounted capsules and is designed for professional microphones.
Cisco IP Phone Handset Audio PCA
This printed circuit assembly is designed for Cisco 7900 series IP phone handsets and includes DSP chips for echo cancellation and noise suppression. It is a component dedicated to the audio processing function of telephone handsets. As a part of a handset, it is classified under the parts provision of this tariff item.
Conference Microphone Array Signal Processor PCA
A multi-channel printed circuit assembly with beamforming DSP for ceiling-mounted conference microphone arrays. It processes multiple mic capsules into clear audio pickup and is designed for professional microphones.
Crown Audio Amplifier Power Transistor Module
A high-power transistor module for Crown professional audio amplifiers, containing matched MOSFET pairs on a heatsink. It is an electrical component part of audio amplifiers. This product is classified under 8518.90.00 as a part of audio-frequency electric amplifiers.
Digital Modeling Microphone Processing Board
An advanced DSP printed circuit assembly for digitally modeling microphones that emulate classic patterns. It processes multiple capsules on a single board for professional condenser microphones.
Digital Wireless Mic DSP Audio Processing Board
A high-performance digital signal processing printed circuit assembly for digital wireless microphone systems, handling audio encoding, error correction, and amplification. It is a component part of wireless microphone systems classified under heading 85.18. This product is classified under 8518.90.00 as a part of microphones and their stands.
Electro-Voice EV30C Horn Driver Diaphragm
A titanium diaphragm for the Electro-Voice EV30C compression driver used in professional horns. It is a high-frequency transducer replacement part for loudspeakers. This product is classified under 8518.90.00 as a part of loudspeakers.
Grandstream WP810 Handset PCB
This printed circuit assembly is for the Grandstream WP810 weatherproof line telephone handset and includes ruggedized audio processing with a bone conduction mic interface. It supports wideband codec operation and is designed specifically for this handset model. As a dedicated handset component, it falls under the parts provision of this tariff item.
Handset Microphone Wiring Harness
This custom wiring harness connects microphone elements to telephone handset bases in line telephones and includes shielding for noise rejection and strain relief. It is a dedicated component of telephone handsets. As a part of a handset, it falls under the parts provision of this tariff item.
JBL Control 1 Speaker Woofer Driver
A 5.25-inch woofer driver unit for the JBL Control 1 loudspeaker system, featuring a paper cone, voice coil, and magnet structure. It is a component part of a loudspeaker, excluding the enclosure. This product is classified under 8518.90.00 as a part of loudspeakers.
Line Repeater Signal Conditioning Board
This printed circuit board assembly with microphone preamplifiers is for analog telephone line repeaters and conditions low-level audio pickup signals for transmission over copper lines. It is a dedicated component of repeater equipment. As a part of audio-frequency electric amplifiers used in repeaters, it is classified under the parts provision of this tariff item.
Line Telephone Handset Microphone Assembly
A microphone component assembly specifically designed for integration into line telephone handsets classified under subheading 8518.30.10. It captures voice signals for transmission over analog telephone lines.
Meyer Sound MJF-212 Driver Kit
A complete driver replacement kit for the Meyer Sound MJF-212 concert loudspeaker, including a woofer, compression driver, and horn. It is a set of transducer parts for a loudspeaker system. This product is classified under 8518.90.00 as parts of loudspeakers.
Microphone Preamp Printed Circuit Board
A printed circuit assembly containing amplification circuitry specifically designed for professional condenser microphones. It processes low-level audio signals from the microphone capsule.
Mitel MiVoice Handset Audio Assembly
This handset printed circuit assembly is for Mitel MiVoice 6900 series telephones and includes an Opus codec, noise suppression, and stereo wideband support. It is designed for enterprise line telephones and functions as a dedicated audio processing component. As a part of a telephone handset, it is classified under the parts provision of this tariff item.
Neumann U87 Microphone Capsule
A large diaphragm condenser capsule for Neumann U87 studio microphone. It is a dual-diaphragm K67 pattern switching capsule and a reference standard microphone part.
Peavey Microphone Preamp Circuit Board
A Class-A microphone preamplifier PCB for professional mixing consoles. It contains discrete transistor audio circuitry and is a part of microphone amplifier systems.
Polycom Handset PCB Assembly
This printed circuit board assembly is for Polycom line telephone handsets and contains audio processing chips, microphone interfaces, and speaker drivers. It is a dedicated component for the audio functions of the handset. As a part of a telephone handset, it falls under the parts provision of this tariff item.
Professional Earset Microphone Amplifier Board
A printed circuit assembly for headworn earset microphones used in broadcasting and theater. It contains close-talking mic preamp and beltpack amplifier circuitry for professional microphones.
Repeater Bus Interface Circuit Board
This digital signal processing board is designed for line repeaters and provides equalization, gain control, and impedance matching. It supports T1/E1 carrier systems and is a dedicated component of repeater equipment. As a part of audio-frequency electric amplifiers used in repeaters, it is classified under the parts provision of this tariff item.
Repeater Station Microphone Pre-Amplifier
This low-noise pre-amplifier circuit board is for microphone signals in analog telephone repeater stations and provides initial gain before main repeater amplification stages. It is a dedicated component of repeater equipment. As a part of audio-frequency electric amplifiers used in repeaters, it is classified under the parts provision of this tariff item.
Ribbon Microphone Signal Conditioning PCA
A specialized low-noise printed circuit assembly for passive ribbon microphones requiring high-ratio transformers and amplification. It restores delicate ribbon output to line level for professional microphones.
Snom Handset Microphone Amplifier PCA
This microphone preamplifier and codec printed circuit assembly is for Snom line telephone handsets. It features a low-noise ADC, AGC, and comfort noise generation per RFC 3389. As a dedicated handset component, it falls under the parts provision of this tariff item.
Studio Condenser Mic Headphone Amplifier Board
A compact PCA providing monitor headphone amplification integrated with large-diaphragm studio condenser microphone electronics. It allows zero-latency artist monitoring during recording.
Telephone Handset Acoustic Coupler Assembly
An acoustic interface assembly that mounts inside line telephone handsets to optimize microphone pickup patterns. It includes damping materials and porting for clear voice transmission.
Telephone Repeater Audio Input Module
This audio input module serves as the microphone interface for analog telephone line repeaters and amplifies and conditions weak voice signals in long-distance analog repeater stations. It is a dedicated component of repeater equipment. As a part of audio-frequency electric amplifiers used in repeaters, it is classified under the parts provision of this tariff item.
Telephone Repeater Rackmount Audio Interface
A rackmount audio interface panel designed to connect microphone inputs to central office analog repeaters, offering multiple channels for trunk line applications. It functions as a component part of an audio-frequency electric amplifier system, specifically the repeater equipment. This product qualifies under tariff item 8518.90.00 as a part of audio equipment.
Tellabs Line Repeater Amplifier Board
This universal line repeater PCB is for Tellabs universal shelf systems and includes automatic gain control and pulse shape correction. It is compatible with HDSL/HDSL2 technologies and functions as a part of repeater equipment. As a component dedicated to line repeaters, it is classified under the parts provision of this tariff item.
UHF Wireless Mic True Diversity Receiver Board
A dual-tuner printed circuit assembly for UHF true diversity wireless microphone receivers, providing dropout-free audio by selecting the strongest signal. It is a part of wireless microphone systems classified under heading 85.18. This product is classified under 8518.90.00 as a part of microphones.
Western Electric 500-Series Microphone Insert
An OEM replacement microphone insert for Western Electric 500-series line telephones. The carbon button design maintains authentic voice characteristics for classic telephone handsets.
Wireless Microphone Receiver Audio Board
A printed circuit assembly for the audio processing and amplification section of wireless microphone receivers, handling RF demodulation and audio output for live sound systems. It is a component part of wireless microphone systems classified under heading 85.18. This product is classified under 8518.90.00 as a part of microphones.
Yealink SIP Handset Audio Board
This SIP telephone handset printed circuit assembly is for Yealink T-series phones and includes HD voice codec (Opus/G.722), AEC, and VAD functions. Despite the IP connectivity of the base, this handset PCB is dedicated to audio processing. As a part of a telephone handset, it falls under the parts provision of this tariff item.