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作为音响微信群诸多的发烧友，你一定见过Wilson B的落地音箱的推广录音视频。
虽然视频录音无法说明一切，但作为技术型音响发烧友，至少让我对其两只低音的设计充满好奇。
ISOBARIC，等压推挽双低音设计，1950年，著名的录音师，声学大师Harry Olson的发明之一。
The Isobaric loudspeaker configuration was first introduced by Harry F. Olson in the early 1950s, and refers to systems in which two or more identical woofers (bass drivers) operate simultaneously, with a common body of enclosed air adjoining one side of each diaphragm. In practical applications, they are most often used to improve low-end frequency response without increasing cabinet size, though at the expense of cost and weight. The name is derived from the term Isobar ("equal pressure"), which comes from the Greek word "isobares", meaning "of equal weight".[1] As the word implies, the enclosed air does indeed experience roughly equal pressures from each diaphragm it contacts, but those forces are actually parallel, rather than opposing, so the air is forced to move.
那这种设计到底优点在哪里呢？
有无缺点？
经过搜索，翻译，出处如下，的确了得。
ConclusionThe compound isobaric design is not very popular these days. It was widely spread several decades ago, when speakers used to have a huge Vas value. In the present, speakers are more optimized and many don’t require big enclosures. However, some companies (like Bose) use the isobaric subwoofer box design technique, for a small footprint but big on sound. The advantages and disadvantages are few and straightforward : - Advantages :
- Reduces the box volume requirements to half.
- No efficiency loss when the speakers are wired in parallel.
- Disadvantages :
- The price paid for an extra woofer.
- Increased difficulty in building the box (not so much for the push-pull with mounting on the same baffle).
- Amplifier needs to handle low impedance loads for wiring in parallel.
唯一的缺点是成本多，难度高，搭配功放要求电流更大，就是字，一个贵。
但优点是1 降低一半容积，2平行（非Wilson B的方式）排列的话，没有效率损耗。
大家知道有哪些平行排列的等压推挽音箱吗？
貌似因为难度高，非常少见。据说爱格斯顿音箱是的，还有其他吗？
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发表于 2021-2-14 09:35:43
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