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M7 Parameters

Audio input: RCA input*1 group

3.5 stereo input*1 group

Wireless Bluetooth input*1 group

Audio output: RCA output*1 group

M7 size reference: 16L*11.5W*7H CM

Note: (height is measured by the height of the tube)

Power DC input: 12V voltage input (free delivery of high-quality power adapter, universal)

M7 fever preamp packing list: host*1, power supply*1, electronic tube*2, bluetooth antenna*1, warranty card*1.

The M7 fever tube Bluetooth audio receiver is the preamplifier, and the audio signal input end can be wired to connect audio sources such as computers, CDs, and lossless music players, as well as mobile phones, tablet computers, etc. via Bluetooth. The audio output terminal can be connected to various digital power amplifiers, active multimedia speakers and other audio equipment, making your audio equipment instantly full of courage, making the sound quality warm and detailed, enhancing the sense of heaviness and presence, and the expressiveness of the sound field is very good. M7 has the function of high and low frequency adjustment, which can be adjusted freely according to the different parameters of the respective audio equipment to achieve the ideal HiFi sound quality!

The M7 has multiple sets of audio source inputs, and the front panel has an audio source switching switch, which can be freely switched between various audio source inputs, and you can do whatever you want.

The M7 audio input and output terminals are all made of expensive thick gold plating to ensure lossless signal transmission. The bile duct adopts the classic 6J1 electronic tube. During the design process, the circuit has been optimized many times to make it very daring, the sound is warm and audible, the sound field is wide, the unique high and low bass adjustment and wireless Bluetooth function make it even more powerful!M7 Bluetooth module is BTM625 Bluetooth audio module, using CSRA64215 chip, supporting A2DP, AVRCP, HFP, TWS, AAC, I2S, APTX, APTX-LL, etc., using 4M SPI FLASH memory chip. The external high-gain detachable antenna truly makes the signal stable and lossless transmission. The M7 adopts 2 high-quality relays and a high-precision custom crystal oscillator, which has a power-on protection function to protect your various audio equipment from any damage.

The Bluetooth decoding part adopts the latest American ESS9023 top decoding core. ES9023 is a 24bit stereo audio digital-to-analog conversion chip (DAC) from ESS. It adopts the industry's advanced SABRE digital-to-analog conversion technology. The price-performance ratio makes it ideal for digital-to-analog conversion. ES9023 uses the patented Hyperstream architecture and time-domain jitter removal technology, which enables it to achieve jitter-free recording-level sound quality, with a dynamic range of 112dB.

Many music enthusiasts are more concerned about the problem that the noise floor and current noise of the pre-stage of the tube tube are very large, which does not exist here at the M7. The M7 performs extremely well in controlling the noise floor. The circuit design has been debugged and optimized for many times to make the background quiet. , there is no current noise floor, what brings you is a pure, natural, nostalgic sound.

After the M7 preamp is connected to the audio equipment, the correct boot sequence is: first open the preamp (M7), and then turn on the audio equipment such as the power amplifier and active multimedia speakers connected to the M7.

Once again, explain to entry-level buyers that the M7 is a preamp, not a power amplifier, and does not have the function of a power amplifier. M7 needs to be connected to an amplifier or active multimedia speakers. Please confirm your needs before purchasing!

Common causes of noise floor:

1. The probability of noise floor current noise caused by general audio lines is very high.

2. Make sure that there is no problem with your own audio source. The preamplifier of the tube has the function of preamplification. If the audio source itself has noise, the preamplifier of the tube will only amplify its noise.

3. The electronic tube is not plugged into the base, please be sure to plug the electronic tube into the base.

The M7 adopts an all-aluminum casing, which is small and exquisite. The front and rear panels are precisely machined by a CNC machining center, which brings you a comfortable operating feel. The ultra-small size will not take up too much space on your desktop. The M7 is not only a real fever It is also a beautiful desktop decoration. The fonts on the machine panel are all engraved by expensive lasers.