Influence of pre-amplifier on crossover and speaker

                       Influence of pre-amplifier on crossover and speaker

(crossover, speaker crossover, bass crossover)

There are a total of 17 series of speakers in Audio Note, and the AN-E/SPe He we introduce here is just one of them. The speakers used in the whole series are exactly the same in size, but the internal wiring, frequency divider design and working efficiency are different. , Let Audio Note arrange and combine 17 speakers. And if that's not enough to dazzle you, no problem, Audio Note also offers over 20 different wood grain options, guaranteeing you the most unique Audio Note speakers.

The model names of AN-E/SPe He actually have meanings. AN-E is the series name, SPe means that the internal wiring uses AN-SPe wiring, and He means efficiency enhancement. The standard version of the AN-E speaker has a working efficiency of 94dB , increased by about 4dB after He enhancement, but what is interesting is that the work efficiency of other He versions is increased from 94dB to 98dB, but AN-E/SPe He is 97.5dB. If the word Signature is added after the AN-E/SPe He model, it means that the frequency divider external separation design is adopted, and the level is raised by one level.

AN-E/SPe He's internal frequency divider, internal cables and internal terminals have all been upgraded, which is at the same level as the standard version of AN-E/SPe He. The AN-E/SPe He is a further upgrade, replacing the frequency divider, internal cables and internal terminals. It is almost the same as the original Alumine FIVE in appearance. The front baffle of the upper cabinet of the midrange unit is covered with a layer of leather

treble crossover

AN-E/SPe He uses a 1-inch silk soft dome tweeter, plus an 8-inch high-efficiency mid-bass unit. The voice coil is made of silver wire. Snell's classic design. After many years of Snell's discontinuation, Audio Note revived the classic Snell speaker, emphasizing that high-efficiency speakers can reproduce the best musical performance. However, Audio Note is not a replica of Snell, but invests in a lot of research and development, such as speakers The cabinet is made of Russian birch (Birch), and all units are designed to match the speaker cabinet.

speaker crossover

Audio Note believes that the silk soft dome tweeter and the paper cone diaphragm mid-bass look old-fashioned, but they are the diaphragm materials with the best sound and the lowest sound dyeing. The frequency divider adopts the simplest first-order divider, and All the booths are built by hand, and Audio Note is most proud of its speakers, which is the strict pairing of left and right channels. The original factory said that their speakers are not only 100% inspected before leaving the factory, but the matching error is less than 0.4dB, and the original factory emphasizes that, Only Audio Note in the world implements such strict inspection and matching.

In order to make the sound work better and show the performance of the crossover perfectly, I chose a Pro i to push this box. Pro i is a high-end device with streaming function, digital analog decoding and headphone amplifier. From the name, it tells you straightforwardly that it has DSD decoding capability, but in addition to decoding, the biggest feature is Exclusively developed "Crysopeia FPGA Digital Engine" digital computing engine, this technology can upgrade all music files entered into iDSD to DSD1024 before decoding and sending, reaching the highest standard level in the industry.

Divider by two

Pro i can also support UPnP transmission in streaming mode, and play network music such as NAS, Tidal, Spotify, etc. through the network. It also supports MQA format music provided by Tidal, and also has USB input, SPDIF input, AES/ EBU input and other ways to connect to other digital sources are very easy to use, and the sources that can be matched are almost all-encompassing.

What is more special is that iDSD provides three analog amplification circuits, the first is pure Class A crystal amplification without using vacuum tubes. The second is an amplified circuit designed with two GE5670 vacuum tubes to provide a warm tube sound. The third type is also a vacuum tube amplifier circuit, but it provides another flavor of sound by reducing the loop gain and negative feedback. Moreover, in the circuit design, the crystal expansion circuit board and the vacuum tube expansion circuit board are completely separated, instead of just switching circuits on the same circuit board, completely avoiding interference.

three divider

Pro i also has many rigorous circuit designs, such as the XMOS XU216 X-Core 16-core digital processing chip with a maximum computing power of 2,000 MIPS, which is used as a digital signal receiver for USB, AES/EBU, SPDIF, wireless and network Processing wafers, unless digital filtering is used, all digital processing is bit-perfect.

All digital signals received by Pro i will be temporarily stored in the memory and recalibrated through the "Global Master Timing?" clock technology, including the internal XMOS and FPGA chips, which are used to organize the clock. Pro i uses "Galvanically-Isolated" on all signal input paths. Through this design on the circuit, the electrical interference between each input terminal is isolated. In addition, the USB input has its own power management system, using multiple Voltage stabilizing components, and complete electrical isolation of the power generated by this part.