话说转眼间拓品L30作为拓品的拳头产品已经发布了两年多了。人年纪大了之后就会觉得日子变得特别快,我甚至感觉测L30还是在上个礼拜的事情…… 结果这两天我收到了L30的换代产品:Topping L30II 那么这个L30的后续产品能不能延续L30的辉煌呢?让我们拭目以待:
![Photo Photo](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Photo-13-1024x683.jpg)
![Rear Rear](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Rear-5-1024x683.jpg)
![Photo2 Photo2](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Photo2N-1024x683.jpg)
其实粗看上去L30II和L30并没有什么不同,除了型号标记上有一个II以外,就是增益从L30的+9 0 -9db变成了H M L。据测量,三档增益分别为16.5db 0db -14db。让我们直接测量吧:
![Dashboard Dashboard](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Dashboard-5-1024x560.jpg)
![Dashboard5V Dashboard5V](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Dashboard5V-1024x560.jpg)
![Dynamic-Range Dynamic-Range](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Dynamic-Range-10-1024x768.jpg)
105db的50mVSNR是通过增加一个40db增益的前级放大后获得的
![%title插图%num Linearity-(1](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Linearity-1-1024x779.jpg)
![THD+N-Ratio-vs-Freq@2V THD+N-Ratio-vs-Freq](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/THDN-Ratio-vs-Freq-12-1024x834.jpg)
好吧,其实这图有点恶搞,拉一下纵轴的话是这样的:
![THD+N-Ratio-vs-Freq @2V -2 THD+N-Ratio-vs-Freq @2V -2](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/THDN-Ratio-vs-Freq2-1024x834.jpg)
如果4.9V的话(L30用4.9V测量过)是这样的:
![THD+N-Ratio-vs-Freq-4.9V THD+N-Ratio-vs-Freq-4.9V](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/THDN-Ratio-vs-Freq-49V-1024x834.jpg)
![SMPTE-Ratio SMPTE-Ratio](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/SMPTE-Ratio-14-1024x826.jpg)
![Multitone Multitone](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Multitone-11-1024x820.jpg)
更新:Crosstalk
![Crosstalk Crosstalk](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/Crosstalk-1024x832.jpg)
![THD+N-Ratio-vs-Measured-Level-Gain-M THD+N-Ratio-vs-Measured-Level-Gain-M](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/THDN-Ratio-vs-Measured-Level-Gain-M-1024x417.jpg)
![THD+N-Ratio-vs-Measured-Level-Gain-H THD+N-Ratio-vs-Measured-Level-Gain-H](https://cdn.l7audiolab.com/wp-content/uploads/2022/07/THDN-Ratio-vs-Measured-Level-Gain-H-1024x417.jpg)
总结:L30的补完版(高增益可以在2V输入的情况下达到满功率、更宽泛的增益范围、更大的高阻输出功率)
我没有文化,看不懂,谁能告诉我这个好不好?
测量简介 – L7Audiolab
无敌了
🚢: “We will design a better single-ended amp, better than your L30.”
🐏: Beat you to it.”
Crosstalk?
This makes me wondering why I’m paying hundreds of dollars more to get the D90se+A90 set
This machine has no balanced outbut
为什么不增加4.4口呢,作为桌面小台机,推推塞子多舒服
L30的标准用法是买两台,就有平衡了。
为毛是黑白照
不知道电源适配器还裂不裂开,L30这电源上的塑料日常裂开,换回来马上裂,虽然也不影响使用就是了……
前级能有多少测试的,一粒不太差的运放就可以达到这指标吧。