![]() Oriolus 1795 | 4.4mm Bal + 3.5mm SE or 2.5mm Bal + 3.5mm Bal + 3.5mm SE | Qualcomm CSR8675 + TI PCM1795 | LDAC, aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Wireless Charging | USB DAC | Type-C | MSRP: $235.Hiby W3 | 3.5mm SE | Qualcomm CSR8675 + AKM AK4377 | app enhanced | firmware upgradable | UAT, LDAC, aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Type-C | MSRP: $43 ($59).Hagibis X3 | 3.5mm SE | Qualcomm CSR8675 | aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Tx + Rx | multi-points | microUSB | MSRP: $30.FiiO M5 | 3.5mm SE | Qualcomm CSR8675 + AKM4377 | firmware upgradable | LDAC, LHDC, aptX-HD, AAC, aptX, SBC | USB DAC | Tx + Rx | Type-C | MSRP: $110.ArtExtreme R7 | 3.5mm SE | Qualcomm CSR8675 | aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | MSRP: $115.Shanling UP2 | 3.5mm SE | Qualcomm CSR8675 + ESS ES9218P | app enhanced | firmware upgradable | LDAC, LHDC, aptX-HD, aptX-LL, AAC, aptX, SBC | USB DAC | BT5.0 | Type-C | MSRP: $79.Hiby W5 | 3.5mm SE | Qualcomm CSR8675 + ESS ES9218P | app enhanced | firmware upgradable | UAT, LDAC, aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Type-C | MSRP: $109.Levn BTI-031 | 3.5mm SE + 4.4mm Bal | Qualcomm CSR8675 | aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Tx + Rx | microUSB | MSRP: $28. ![]() Audio BT03 | 3.5mm SE | Qualcomm CSR8675 + TI PCM5102A | aptX-HD, aptX-LL, AAC, aptX, SBC | USB DAC | Type-C | MSRP: $42 ArtExtreme R3 | 3.5mm SE | Qualcomm CSR8675 | aptX-HD, aptX-LL, AAC, aptX, SBC | BT5.0 | Type-C | MSRP: $87.Ampio P1 VS-1480 | 3.5mm SE | Qualcomm | LDAC, aptX-HD, AAC, aptX, SBC | Qualcomm | USB DAC | BT5.0 | microUSB | MSRP: $140 (n/a).Ampio M1 VS-1880 | 3.5mm SE | Qualcomm | LDAC, aptX-HD, AAC, aptX, SBC | USB DAC | BT5.0 | microUSB | MSRP: $190 (n/a).Audio Technica AT-PHA55BT | 3.5mm SE | Qualcomm + ESS ES9118 | LDAC, aptX, AAC, SBC | BT4.2 | microUSB | MSRP: $130 ($140).Bluewave Audio GET | 3.5mm SE | Qualcomm CSR8675 | aptX-HD, aptX, AAC, MP3, SBC | USB DAC | BT5.0 | microUSB | MSRP: $130 ($99).TempoTec Blue | 3.5mm SE | Savitech SA9910 + Cirrus Logic WM8904 | LHDC, SBC | microUSB | MSRP: $42.Auris Amplify | 3.5mm SE | Qualcomm CSR8675 + AKM AK4377 | LDAC, aptX-HD, aptX-LL, AAC, aptX, SBC | Type-C | MSRP: $89.Astell&Kern AK XB10 | 3.5mm SE + 2.5mm Bal | Qualcomm CSR8675 + Cirrus Logic CS4350 | aptX-HD, aptX, AAC, SBC | microUSB | MSRP: $180 ($85).FiiO BTR3 | 3.5mm SE | Qualcomm CSR8675 + AKM AK4376a | app enhanced | firmware upgradable | LDAC, LHDC, aptX-HD, aptX-LL, AAC, aptX, SBC | USB DAC | BT4.2 | Type-C | MSRP: $70 (Discontinued).Radsone EarStudio ES100 | 3.5mm SE + 2.5mm Bal | Qualcomm CSR8675 + Dual AKM AK4375a | app enhanced | firmware upgradable | LDAC, aptX-HD, AAC, aptX, SBC | USB DAC | BT5.0 | Type-C | MSRP: $99. ![]() So far the short list is (*in no particular order): So all the above hi-res codec shouldn't be a prime concern to you but AAC support is a must. A note to all Apple user - your devices only support AAC and SBC. (4) Above average, if not really good SQ. (3) Support on-board mic / voice input so it can take phone call. (2) Supports at least one Hi-Res / HD codec, meaning at minimum of 24bit, i.e. (1) Relatively small, near or smaller than a Zippo lighter or at least designed to be able to put into a shirt's front pocket / clip to collar / hang onto the neck, etc without too much effort. To set the ground rule and scope of discussion, we will keep it to BT adapters that are: Given the trend, I think it is about time for a general discussion thread dedicated to these small but high quality BT adapters. We also see more BT5.0 implementation with newer BT chipsets, pairing with independent DAC / codec chip for improved SQ. This means BT transmission is moving from lossy Red Book CD 16bit / 48kHz compression to almost lossless 24bit / 96kHz (and soon perhaps 24bit / 192kHz) Hi-Res standard. Recently we have seen major advancement on BT codec as we moved from SBC/AAC to aptX (plus aptX LL and HD), then Sony's LDAC, Huawei backed SaviAudio's HWA (LHDC), and Hiby's UAT. I has always been interested in wireless headphone audio, more specifically BT adapter for headphone.
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