本次发布二块新的PCB： dam1941(平衡)/dam1921(单端)
技术指标爆炸，信噪比和动态范围都达到130dB水平，吓死个人。
分立式R2R做到这个指标，已经是前所未有了。
价格也大幅上升。
无论是DIY还是厂家用来正经做产品，都有了更好的好选择。
不过话说回来，这东西和9038一样，指标再高，做出成品来好不好听才是重点。
dam1921-02: RMB 4000 (0.02% resistors, partial mounted single ended version)
dam1941-12: RMB 6000 (0.01%/0.02% resistors, fully mounted balanced version).
dam1941-12: RMB 6000 (0.01%/0.02% resistors, fully mounted balanced version).
预售有优惠。
输入：
- USB （XMOS interface）
- AES
- S/PDIF RCA
- S/PDIF BNC
- Toslink
- I2S
主控：FPGA
输出：
- dam1941: 单端 / 平衡 各一组，同时工作
- dam1921: 单端一组
Specifications
| Product Name | dam1941-12 | dam1921-02 |
| THD @ -1db | <0.005% | <0.008% |
| THD @ -60dB | <0.02% | <0.03% |
| Clock Jitter RMS | 0.3 pS typical | 0.3 pS typical |
| Resistors Precision | 27 bit, 0.01% / 0.02% Resistors | 27 bit, 0.02% resistors |
| Dynamic Range | 134 dB | 130.4 dB |
| S/N Ratio 20 Khz Bandwith | 132 dB unweighted | 129 dB unweighted |
| Frequency Range +0.1dB -1.0dB | 20hz – 20Khz | |
| Input SPDIF | Up to 24 bit / 192 Khz | |
| Input USB / I2S PCM | Up to 24 bit / 384 Khz | |
| Input USB / I2S DSD | Up to DoP128 and DSD256 | |
| Digital volume control | -90 dB to +10 dB | |
| Output Line | Bal 2.6V RMS, Zout 1250 Ohm | SE 1.3V RMS, Zout 625 Ohm |
| Power | +5V max 0.6A, -5V max 0.1A | |
| Size | 144 x 162 x 30 mm | |