Multi-channel Active Electronic Crossover
The EJ 01 features the classic PCM1795 decoding chip, coupled withadvanced analog electronic five-way crossover technology, precisely dividingthe audio signal into five independent frequency bands: ultra-low frequency,low frequency, mid frequency, high frequency, and ultra-high frequency. Unliketraditional passive crossover devices, the EJ 01 employs an active electroniccrossover solution, relying on operational amplifiers, high-pass, low-pass, andband-pass filter circuits to achieve precise frequency band segmentation oflow-level signals. This results in an extremely steep filter attenuation slope,completely resolving the issues of frequency band mixing and signal crosstalkin traditional crossovers, ensuring complete separation of the five frequencybands. Furthermore, this architecture eliminates the need for passive matchingcomponents such as inductors, capacitors, and resistors between the amplifierand drivers in traditional devices, eliminating the need for additional passivesound pressure level and phase adjustments. This reduces signal loss and noiseinterference from the hardware source, significantly improving sound purity,detail reproduction, and layering.
10 IndependentHeadphone Amplifiers
The EJ 01features 5 amplification channels for each of the left and right channels,resulting in a total of 10 independent headphone amplifiers across allchannels. After frequency division, the low-level signals for each frequencyband are individually sent to their corresponding dedicated power amplifiers,achieving a dedicated drive mode of "one frequency band, oneamplification, one driver." Each channel amplifier and headphone driverfocuses solely on their corresponding frequency band, eliminating issues suchas uneven power distribution and frequency interference across the entirefrequency range. This significantly improves sound stability inhigh-dynamic-range music scenarios, effectively reduces intermodulationdistortion, and offers a higher device load limit, making it less prone tooverload.
All-ScenarioInput Modes
The EJ 01 breaksdown the boundaries of listening scenarios, featuring three input modes:Bluetooth, USB, and line-in, fully adapting to diverse high-fidelity listeningneeds such as mobile, desktop, and Hi-Fi systems. The line-in input offers dualinterfaces: a 4.4mm balanced interface and a 3.5mm single-ended interface,compatible with various front-ends such as portable players, desktop decoders,and CD players. The balanced interface achieves lower noise floor, a widersoundstage, and superior dynamics, while the single-ended interface iscompatible with universal devices. The Bluetooth 6.0 module supports mainstreamhigh-definition codecs such as aptX, aptX-HD, aptX-LL, aptX-Adaptive, LDAC,AAC, and SBC. Relying on the AK4137EQ upsampling chip, it instantly upsamplingBluetooth audio sources to 24Bit/192kHz, achieving a near-wired Hi-Fi listeningexperience. The USB decoder uses the XMOS XU316 professional USB digitalinterface, allowing for plug-and-play use with Android and Apple deviceswithout drivers. The hardware supports PCM 32bit/768kHz and DSD256ultra-high-specification audio, fully releasing high-resolution music details.
CustomizedMulti-Driver Composite Earphones
The EJ 01 comeswith custom-designed in-ear earphones featuring a 10-driver compositearchitecture on each side. This architecture comprises one custom 10mm dynamicdriver, five balanced armature drivers, and four electrostatic drivers,combining the acoustic strengths of each type: the dynamic driver handles thelow frequencies with ample dynamics and deep bass extension; the balancedarmature drivers accurately reproduce midrange vocals and instrument detailswith a warm, full, and delicate tone and outstanding resolution; and the fourelectrostatic drivers extend the ultra-high frequencies effectively, deliveringa transparent, airy, and naturally extended sound, perfectly suited for diversegenres including symphonies, vocals, instrumental music, and electronic music.The earphone output features a six-pin copper-plated silver aviation connectorwith a dedicated 12-core headphone cable, ensuring a stable connection,significantly reducing signal transmission loss, and avoiding poor contact andsignal attenuation, thus providing a solid hardware foundation for stablefull-frequency output from the multi-driver earphones.
