朋友們的新解碼
本帖最后由 kakui 于 2015-3-18 09:28 编辑SOEKRIS 0.01%版,朋友們真幸福
dam1021-01: 0.01% resistor version S/N 20 Khz Bandwith 127 dB
unweighted Frequency Range +0.1dB -1.0dB 20hz - 20Khz
Output unbuffered Single ended 1.4V RMS, Zout 625R Output buffered Balanced 4.0V RMS,
Zout 20R Power input 7-8V AC or +-7-15V DC max 5W Board size 3.2" x 5.8" (81 x 147 mm)
后面那一大坨是DIY的解码片？眼晕啊。 呵呵 发表于 2015-3-18 09:49
后面那一大坨是DIY的解码片？眼晕啊。
只有成品板:lol
米物， 这个板子做起来要花不少米啊 走过路过不要错过！学习了 广东七色桥 发表于 2015-3-18 11:24
这个板子做起来要花不少米啊
不會啦,加電源跟輸入界面已經可以了:L 啥解码芯片啊 还好没有密集恐惧症。。。 难道是传说中的纯电阻R2R-DAC吗？ blureye 发表于 2015-3-18 20:22
啥解码芯片啊
The dam1021 is a DAC module based on a discrete R-2R sign magnitude DAC design, with FPGA based FIFO buffering/reclocking and custom digital filters, < 1 ps jitter clock generator, with 28 bit resolution so there is headroom, oversampling up to 3.072 Mhz. Up to 24 bit / 384 Khz input from SPDIF, I2S and USB (via USB to I2S interface board), with isolation on the I2S interface. The board is very flexible, with digital volume control and filter parameters that can be downloaded. The board is fully firmware upgradable over a simple serial connection, which enable new features later on, for now we plan to add digital crossover filters soon. The basis R-2R network has an output voltage of 1.4V RMS and output impedance of 625 ohm and can therefore drive a lot of things directly. There is also onboard balanced output drivers that can drive high impedance (>= 300 ohm) headphones directly. The power supply is also onboard, just add a 5W+ toroid transformer. What is the difference between boards using 0.01%, 0.02% or 0.05% resistors ? Only the harmonic distortion get better with more precise resistors, and typically they will sound much the same as the resistors initially are better then specified. But the more precise resistors has smaller temperature drift and better long term stability, and therefore will be better in the long term. wxkwgx 发表于 2015-3-18 20:29
难道是传说中的纯电阻R2R-DAC吗？
2014 7月尾開賣，大家一直只留意事態發展:lol 强烈关注。 好看，声音如何？？ 13531367737 发表于 2015-3-18 21:42
好看，声音如何？？
用紙盒那位朋友未裝機箱，已打算把手頭的ps audio 放售 本帖最后由 blureye 于 2015-3-18 22:15 编辑
kakui 发表于 2015-3-18 20:55
The dam1021 is a DAC module based on a discrete R-2R sign magnitude DAC design, with FPGA based FI ...
kakui 发表于 2015-3-18 20:55
The dam1021 is a DAC module based on a discrete R-2R sign magnitude DAC design, with FPGA based FI ...
LZ你那样飞线过去是不好的，IIS是高速信号，得走屏蔽线，屏蔽层接地。
当然你这样飞，还是能响的。 希望 优化 布局 能塞进小机箱，方面近场摆放。 好东西！！！
你朋友的电源好像接错了位置啊？那个J1是接双交流7v的，直流正负12v应该接在J2上好像。