正如任何鼓手都会告诉您的那样，黑格尔辩证法涉及将现有理论与其对立面融合，以建立新的范式。好吧，斯通聋人的设计师必须是德国理想主义哲学的忠实拥护者，因为他们的放大器随着黑盖利安而言。
一般理论是，放大器应该是全阀和全词。但是现代数字技术更适合灵活性 - 那么有第三种方法吗？Stone聋哑人说，您可以很容易地将这两个想法粉碎在一起，结果是SD30组合。
Stone Deaf is a small operation with workshops in Oldham and Huddersfield, and we were seriously impressed by their latest stompbox, the Tremotron – a dual tremolo with a fully analogue signal path and ultra-twiddle-friendly digital control. The SD30 works on the same principles: it’s a proper all-valve amp, powered by four EL84s and with a real spring reverb tank at the bottom; but instead of being controlled by a line of potentiometers and maybe a switch or two, its analogue tones are manipulated digitally – either by the knobs and switches on the top panel, or remotely via MIDI.
The key word here – one that you’ll never hear mentioned in relation to a normal tube amp – is ‘presets’. The SD30 can store up to 128 of them; and while you shouldn’t expect the kind of circuit-swapping versatility of a modelling amp, it is closer to that degree of control than you might think.
除了通常的收益，EQ和Reverb设置外，预设还可以包含一些怪异级别的细节，该细节通常会试图模仿：阀门或固态整流，固定或阴极偏置，以及AB级（30瓦）或类A（8瓦）。让我们重申一下 - 这不是仿真。它通过实际的发光阀来控制电子的流动。
There’s also an effects loop that can be engaged or bypassed as part of each preset, and you don’t need MIDI to explore all this capability: you can toggle through presets, and save new ones, by pushing in the knobs on the top panel and watching the lights change colour accordingly (the gain control works as a clean/dirty channel selector in the same way).
调整可以轻松存储到新的预设中，但是您需要某种具有五针输出的MIDI设备来远程更改任何内容 - 理想情况下是一个多切口脚控制器，尽管即使是便宜的键盘，如果您也可以提供帮助。知道如何编程其数据功能。
Hold on, though – we’re getting hypnotised by all this high-tech sorcery and forgetting the most important part: the amplifier itself. It’s a serious lump of backline, and still would be even if they’d forgotten to put all the digital stuff in.
So, first and foremost it’s a 30-watt 1×12 combo with three 12AX7s, four EL84s and a GZ34 rectifier. Components have been sourced from the UK wherever possible, and a couple of the key ones haven’t had far to travel at all: the speaker is a custom-voiced Fane, made just down the M62 in Castleford, and the transformers are supplied by Huddersfield’s Pennine Radio.
杨树已在橱柜中用于保持体重合理。尽管从内部报告没有太多报告，除了几乎所有内容都附在一个巨大的PCB上，但这是一个非常整洁的构建。
What else is there to play around with? You’ve got three EQ controls, which have been designed not to be interactive at all, giving fully independent control over the different frequency ranges; and there’s a balanced DI output, which is raw and unequalised for re-amping.
正在使用
如何在没有屏幕的小工具上导航128个预设？遵循颜色编码的灯并不像滚动浏览命名声音列表那样简单，因此我们可能会离开那一侧，直到我们拥有声音轴承为止。找到基本的干净语调非常容易，通常的调整与传统放大器的方式确实没有什么不同。
And that basic clean tone is good. Four EL84s, cathode biasing, valve rectification, no negative feedback loop… remind you of anything? It is indeed pretty Voxy – rich, sparkly and spacious, compressing sweetly when pushed – but with a more solid midrange that takes us some way in the direction of Orange.
随着通道量满足，将主控制器转过去只会真正增加饱和度和压缩，但在此下方大声。您不会为舞台数量挣扎。
切换到A类使事情变得更加清洁，更安静，而选择固定偏见具有明显的僵硬效果 - 例如，与AC30般的海绵状和低端花朵说再见。至于整流器开关，这是这三个电路mod中最不重要的，我们想知道可开关的负反馈是否可能是一个更有用的选择。
The solid-state rectifier does open up a teeny bit more headroom with high-gain sounds – and my, what fine high-gain sounds they are. This is big, tight, classic EL84 overdrive, and we could happily thrash away at it all afternoon. The separate volume dials allow plenty of control over the gain structure, and maxing out the high and low EQ with mids fully down, high-output humbuckers can deliver some massive metal tones.
混响很可爱，尽管在我们的评论上，有时绕过时有时会泄漏出来。
那么，通过MIDI跳过所有这些声音是什么感觉？很大程度上取决于您使用的硬件，但是能够保存和回忆如此多的预设音调是一种罕见的享受 - 尤其是使用如此多声音的真实阀门放大器。
毫无疑问，许多玩家会更喜欢一个雄心勃勃的放大器的感觉更直观的感觉，该放大器具有两个或三个频道，甚至可能是混响。但是，如果您需要很多不同的音调，那么您很高兴与MIDI合作，并且希望看到自己的设备像展览会一样亮起，这可能是您梦dream以求的英国人组合。
Key Features
•价格£1,749
•DESCRIPTIONDigitally controlled 1×12 valve combo with reverb. Made in the UK
•POWER RATING30W
•阀3x 12ax7，4x el84，1x gz34
•CONTROL PANEL待机开关；FX环路旁路，阀门或固态整流，固定或阴极偏置，30W AB或8W级A级；主音量，混响，高音，中音，低音（按预设），通道音量（按预设为上），增益（按频道选择器）；吉他输入
•BOTTOM PANELPower switch, 5-pin MIDI input, FX loop send and return with level controls, balanced line out, 4-ohm and 8-ohm speaker outputs
•扬声器1倍定制的FANE FX70
•DIMENSIONS575 x 510 x 265mm
•WEIGHT21.4kg/47.2磅
•CONTACT01706 882486或stonedeaffx.com