iBasso Audio / 3T154SV

iBasso Audio / 3T-154 is an in-ear monitor equipped with a 15.4mm single dynamic driver.

■3T magnetic flux Innovative precision technology
・By matching the innovative dual magnetic circuit design with the customized high magnetic force N55 NdFeB magnet, we have achieved an incredible magnetic flux of 3T (Tesla), which surpasses even other flagship IEMs.
The 3T-154's powerful magnetic flux delivers improved sound quality, including excellent transient and response, accurate and detailed bass, and excellent resolution for an outstanding listening experience.

■Equipped with the industry's largest diaphragm ""15.4mm"" Reproducing the most vivid dynamics ever seen
・3T-154 uses a 15.4mm large-diameter diaphragm, one of the largest in the industry among IEMs. Although the size is significantly larger than the standard 10mm diaphragm driver unit, which is the standard for large diameters, the unit size is 65% smaller than that of a driver unit that uses a 12mm diaphragm, achieving a compact design that simultaneously increases the size of the diaphragm and downsizes the unit. This 15.4mm large-diameter diaphragm has excellent sound pressure levels, and when combined with a ?3T magnetic flux circuit, it achieves superb dynamics that cannot be experienced with conventional IEMs.

■Beryllium plated diaphragm using embossed molding technology
・The beryllium-plated diaphragm boasts excellent internal resistance and excellent rigidity. Furthermore, the 3T-154's sound quality is achieved by using high-precision embossing technology to increase the durability and strength of the diaphragm and reduce distortion to the absolute minimum.

■Parts selection with no room for standing cone
・While the 3T-154 uses a 15.4mm large-diameter diaphragm unit, it has a compact housing size that weighs approximately 9g per side. The 3T-154 uses carefully selected parts and iBasso technology.
・High precision CNC diaphragm bracket
・Customized N55 NdFeB magnet
・Japanese CCAW voice coil (made by DAIKOKU)
・Embossed molding technology beryllium plated diaphragm
・Replaceable nozzle design

■Lightweight and strong high-hardness magnesium alloy shell.
・3T-154 uses a high-hardness magnesium alloy that has excellent strength and rigidity, yet is lightweight. This magnesium alloy is 36% lighter than aluminum alloy even when compared with the same volume, has high rigidity and impact resistance, and has excellent vibration damping properties, suppressing the effects of resonance in the internal unit, minimizing the impact on sound, and ensuring stability.

■Uses 0.78mm 2Pin replaceable high purity silver-plated copper cable
・3T-154 uses a 0.78mm 2Pin detachable connector, allowing you to freely replace the cable. The standard cable is equipped with a high-purity silver-plated copper cable that is compatible with 3.5mm / 4.4mm switches, and you can enjoy switching between single-ended and balanced according to your preference according to the connected equipment.

■1.2mm quick plug switch system with excellent conductivity
- The 3T-154 is matched with a cable that uses a quick plug switch system consisting of four large 1.2mm pins. This 1.2mm pin has a contact area approximately 2.3 times wider than the 0.78 pin of a typical plug exchange system, making it durable, and its low internal resistance provides high conductivity without loss due to signal transmission.


High purity silver plated copper cable
3.5mm connector (installed)
4.4mm connector
5 types of ear pieces
spare nozzle
storage case
dedicated driver
quick start guide
Product warranty


Driver: 15.4mm dynamic driver x 1
Frequency characteristics: 7Hz -41kHz
Sensitivity: 116dB +/-2dB
Impedance: 16Ω
Noise reduction: -26dB
Rated output: 10mW
THD:＜1%(@1kHz/179mV)
Plug: 4.4mm TRRRS gold plated & 3.5mmTRS gold plated
Cable length: 1.2m
Weight: 18.8g (LR earphone body cable not included)