New price levels put CSR’s Bluetooth CSR8675 back on the radar

Edited by ad hoc news Flagship & Bestseller Desk. Reviewed before publication on 06/15/2026 at 1:26 PM ET. Details in the imprint.

The Bluetooth audio SoC CSR8675, originally introduced by CSR (now part of Qualcomm), remains a workhorse in wireless headphones, earbuds and speakers, and recent market data show that complete CSR8675 modules are now commonly available to OEMs for well under $10 in volume, keeping the chip attractive for cost-sensitive designs across mid-range audio products. The CSR8675 is a fully integrated Bluetooth 4.2 class 2 chip with on-chip DSP, codec and power management, and it is still widely used in active noise-canceling (ANC) headphones and wireless audio adapters years after its launch, especially in models targeting a balance of price and feature set in the global market. According to Qualcomm’s legacy product documentation, CSR8675 supports a wide range of audio codecs, including SBC, MP3, AAC and aptX family codecs, making it a flexible choice for manufacturers aiming to support higher quality wireless audio than basic SBC-only implementations allow while keeping BOM costs manageable. The continued use of CSR8675 in many value- and mid-tier headphone designs underlines how this chipset has effectively become a de facto standard in certain price bands of consumer audio hardware, particularly for brands that focus on cost-effective, good-enough wireless performance rather than the very latest Bluetooth specifications.

CSR8675: what the aging Bluetooth workhorse still delivers

At its core, the CSR8675 is a highly integrated single-chip solution featuring a 24-bit DSP core, stereo DACs and ADCs, integrated battery charger support and a Bluetooth 4.2 radio, allowing manufacturers to design compact wireless audio products with relatively few external components and simplified PCB layouts, which can reduce manufacturing complexity and overall system cost. The official block diagram from Qualcomm shows that CSR8675 integrates not only the Bluetooth radio but also a Kalimba DSP and audio interfaces such as I2S and SPDIF, enabling both traditional analog headphone drivers and digital audio paths in soundbars or docking stations using the same core silicon, an important flexibility factor for OEMs designing product families around a shared electronics architecture. In its standard configuration, CSR8675 supports Bluetooth Classic profiles like A2DP, AVRCP, HFP and HSP, with optional aptX Low Latency and aptX HD variants depending on licensing, making it suitable for applications ranging from simple mono headsets to stereo gaming headsets where reduced latency and higher bitrate audio are desirable. Typical operating voltage ranges around 1.8 V for core and 3.3 V for I/O, and many module vendors pair the chip with integrated flash and crystal to offer drop-in modules, which has helped the platform proliferate among smaller brands that lack deep RF design expertise.

One reason CSR8675 persists in the market despite the availability of newer Bluetooth 5.x platforms is that it provides a mature, well-understood feature set for stereo audio without requiring manufacturers to redesign their entire RF and firmware stack, a non-trivial investment for smaller audio brands and ODMs that reuse reference designs across several generations of products. Many popular third-party ANC headphones launched over the last few years have relied on CSR8675-based modules combined with dedicated ANC processors or analog ANC circuits, using the CSR8675 primarily for Bluetooth connectivity, audio codec handling and user-interface functions such as button control and voice prompts. Industry teardown reports frequently identify CSR8675 or its close relatives in mid-priced over-ear headphones and wireless adapters sold under a variety of brands, illustrating how widely the chip has been adopted in the mid-market despite its age. Some OEMs also continue to prefer CSR8675 specifically because of the aptX Low Latency option, which is valued for TV listening and gaming use-cases, and because the firmware and interoperability behavior of the platform are well-characterized with existing smartphones and TVs.

Compared with newer Qualcomm audio SoCs that support Bluetooth 5.2, LE Audio and features like true wireless mirroring, CSR8675 lacks cutting-edge capabilities such as LC3 codec support, low-energy isochronous channels and integrated support for fully wireless earbuds with independent left-right connections, which have become standard in higher-end products. However, the chip’s limitations can be acceptable or even irrelevant for many budget- and mid-priced over-ear headphones and basic wireless speakers, where long-range LE Audio and advanced multi-device features are less critical than stable A2DP playback and reliable voice-call performance. Because CSR8675 is based on a stable silicon and firmware platform that has been in volume production for years, manufacturers can benefit from predictable supply chains and known performance characteristics, which can reduce time-to-market compared with switching to a newer, still-ramping chipset. The chip’s continued presence in ODM reference designs also means that small brands entering the wireless audio market can launch private-label products relatively quickly by reusing existing CSR8675-based designs, even if that means foregoing the newest Bluetooth features.

The pricing environment around CSR8675-based modules has become particularly attractive: distribution and OEM channels indicate that fully integrated modules with CSR8675, flash, RF components and antenna are often offered in mid-single-digit dollar prices at scale, far below the cost of many newer Bluetooth audio SoCs, giving the platform an enduring edge in cost-driven product segments. This cost advantage translates directly into the ability for brands to deliver wireless headphones and speakers in the sub-$50 retail bracket while still offering features such as aptX codec support and acceptable battery life, helping them compete in crowded online marketplaces where price pressure is intense. For ODMs, using CSR8675 not only simplifies development but also can enable a family of related products - for example, an over-ear headphone, an on-ear model and a wireless TV adapter - all sharing the same core electronics, firmware base and RF design, which simplifies certification and after-sales support. Investors and industry observers who track the wireless audio ecosystem note that legacy platforms like CSR8675 illustrate how semiconductor assets acquired through M&A can continue to generate design wins and licensing revenue years after the original standalone company, in this case CSR, disappeared as an independent listing.

Within the broader Qualcomm audio portfolio, CSR8675 now sits below newer QCC-series Bluetooth audio SoCs that target premium true wireless earbuds and next-generation features, but it remains a relevant component for value-centric and legacy designs that do not require the latest Bluetooth standard. Manufacturers that prioritize rapid product refresh cycles based on known-good designs continue to deploy CSR8675 in incremental updates, particularly in markets where consumers place more emphasis on price and basic reliability than on marketing the very latest wireless specifications. For potential buyers of wireless headphones and adapters, understanding that many sub-$100 products still rely on platform generations like CSR8675 can be useful when comparing feature lists and codec support between models from different brands.

CSR as an independent chip designer was acquired and integrated into Qualcomm’s connectivity and audio business, so the CSR brand is no longer separately listed, but its legacy Bluetooth audio chips such as CSR8675 still underpin many devices sold by headphone and speaker brands worldwide, highlighting the enduring commercial impact of the original CSR product line within Qualcomm’s broader portfolio.

This article was a.i.-assisted and editorially reviewed. Product information without warranty; prices and availability may change at short notice. Not investment advice and not a buy or sell recommendation. Trading involves risk up to and including the total loss of invested capital.