ab

谢谢!I just make vector drawings in Inkscape/Adobe Illustrator!

为清楚起见而更新:)

Ha ha ha, precisely! I don't know how many pairs of headphones I eradicated before making my Headphone Dummy Load://www.sledutah.com/Headphone-Dummy-L...Spot on - an 8 or 4 ohm resistor isn't electrically the same as an equivalent speaker, but a much more consistent load to drive for testing purposes. Non-inductive resistors in particular provide consistent testing results across amplifiers and is industry standard when benchmarking amplifier capabilities. A dummy load like this means little fear of damaging a real speaker (high power resistors can take some serious punishment) and best of all - silence! No full-volume 1kHz sine waves blasting your eardrums while testing :)

不用担心，谢谢阅读！

谢谢!是的,还重要,电阻器capable of handling greater-than-average power. While it won't have to dissipate the full force of the current being sent to the speaker, it could face a couple of watts worth of power in a very high power system - 1W for smaller chip amps, but 5W for larger ones is common.

没问题！LM1875指导差不多，将在一两天内完成。

+1

感谢您的反馈！I deliberately use both terms in the article. I use "resistance" to refer to the resistors themselves and considerations around which ones to use (for the sake of avoiding confusion), but as "impedance" with regards to how an amplifier or source "sees" the load in an AC circuit, which is actually the more correct usage. Check this out for clarity!http://www.electronics-tutorials.ws/resistor/res_8.html

Exactly! A few high power 8Ω resistors - with a switch to connect them in parallel for 4Ω - are the perfect way to test the muscle of a speaker amplifier.

Thank you for the clarification! I've updated the article correspondingly :)

Cheers!

Cheers, thanks!

嘿约翰！谢谢 - 你发现了一个错字。将该帽改为“电解”:)添加到您的评论中，虽然我们不再以这种方式思考100uf，但它实际上是大量电容的影响，并且真的在陶瓷的上限可以可靠地提供的内容（并且便宜地）。然而，它是一个鲜明的事实，即较高的价值陶瓷在较高电压下也会降低，具有更大的方差和电解质在很大程度上避免的不需要的麦克约效应。考虑到许多音频应用需要更高的电压（典型的DIY扬声器放大器可能需要+ -24V）这些效果开始变得相关。所以您的拇指规则是现货的 - 一旦开始进入微法境内，电解质通常应该是考虑。

啊，男人，谢谢你的旅行中记忆道！我不认为你还有你的斩波耳机吗？

干杯 - 没问题！我有一堆经典音频和一般用芯片，我很乐意写作，以及一般有关音频电子产品的一些细节。

Oh cool, that piggybacking idea is awesome, will investigate!

感谢您的反馈意见！欢呼:)

Ha ha, yeah - I built the circuit before drawing out the schematic, so had the benefit of neatening things up and simplifying the layout somewhat. The two are electrically identical, however. And as long as the 0.1uF cap is between the output path and ground, it should still work like a charm. Thanks for the comment!

Yeah, I've got a pile of these lying around :) That being said, "old" doesn't mean "useless", and there is certainly a lot to be learned about audio electronics by understanding some of its more basic components, particularly one like the LM386 which has a very low barrier to entry. A great place to start, with little upfront cost and few extra components required. From there you can of course graduate to your dual LM4780 monoblock beasts!

Thanks for reading it!

你是对的！在我的上下文中更准确的术语将是“响度”以及声压级（DB-SPL）。所说，DB在谈论相对术语或比较水平时是有用的，这是我的意图。我会试图澄清:)

Yeah, I stuck with the LM386N-1 for this article, may update it to include measurements from a LM386N-4. Now to see if I have one lying around...

梦幻！很高兴有另一个专门的音频修正家，特别是早期开始的人;）芯片放大器真正令人敬畏 - 他们走了很长的路，而不是（还是？）所以难以进入业余爱好者的爱好者无法潜入。感谢您的反馈！

Great tutorial - clear and comprehensive. Nicely done!

谢谢你的反馈 - 是的，毫无疑问，跳线是更安全的选择。我喜欢危险地生活，显然！幸运的是，我还没有浸入切换事故;）

肯定的事情。SPDT / DPDT是一种简写，用于描述交换机连接的终端数以及连接终端可以制造的连接数量。例如，简单的开/关摇臂开关可能是SPST（单极，单掷）开关。它将有一个终端连接到接通位置的电路​​，并且没有连接到OFF位置中的任何端子的端子。需要连接或断开的电源开关可以最好地适合DPST开关（双倍杆，单掷）。在接通位置，两根电线都连接到电路，并且在OFF位置，两根电线连接到NOLE。最后，必须将两个端子路由到电路的不同部分的开关可能是DPDT开关。在一个位置tw ...

肯定的事情。SPDT / DPDT是一种简写，用于描述交换机连接的终端数以及连接终端可以制造的连接数量。例如，简单的开/关摇臂开关可能是SPST（单极，单掷）开关。它将有一个终端连接到接通位置的电路​​，并且没有连接到OFF位置中的任何端子的端子。需要连接或断开的电源开关可以最好地适合DPST开关（双倍杆，单掷）。在接通位置，两根电线都连接到电路，并且在OFF位置，两根电线连接到NOLE。最后，必须将两个端子路由到电路的不同部分的开关可能是DPDT开关。In the A position two terminals are connected to one part of the circuit, and in the B position the same two terminals connect to a different part of the circuit.Sparkfun has a good explanation here:https://learn.sparkfun.com/tutorials/switch-basics/poles-and-throws-open-and-closed

现场 - 你需要非常仔细地选择电位计，但这没有问题。至于一点车载电压表，您几乎肯定会有一个小的正向电压降，您必须在四处工作，但当然使用电位计可以拨打它一点稍高并维护您需要的输出。

哈哈，吹东西，再次开始是所有乐趣的一部分。感谢您分享您的构建 - 严重酷炫的东西。跳线也是一个好主意 - 可能比我的DIP开关更安全。

Awesome! Looks great - love the inclusion of the battery.

真棒，看起来很棒！

您的设计很可爱 - 简单，最小，但醒目。看起来像一块正品的高端设备。做得好！

Dang, will keep that in mind ;) Thanks for the feedback!

Cheers Skuttaball - thanks for the vote of confidence! Yeah, I'm glad I was as systematic about the resistor selection as I was, given the results.

Oh wow, this is awesome! Thanks for crunching the numbers - this is by far preferable. Well done, thanks for sharing!

谢谢约翰！

nice！从来没有知道这些存在。制作小DIY焊料笔有几个好的指令......周末项目:)

呸！是的，确实，谢谢你指出它 - 电阻器是30Ω的当然而不是38Ω。我会改变这个！

好点，谢谢你的尖端！我已经想到了我有时会懒散，并使用未使用的地轨，因为类似于垂直桥接组件的东西，所以我喜欢另一根轨道完全“清除”。据说，一个额外的地面“铁路”也派上用场！

Phwoooar, that is a seriously cool design - love the plug-n-play idea there. Such great work!