In developing the second-generation M Series (footnote 1), Mirage engineers focused on four areas they identified as being critical to the product\'s
improvement: tweeter design, crossover points and slopes, midrange and woofer cone materials, and cabinet construction.在发展中国家的第二代M系列（注1 ）
，幻影工程师集中在四个地区，他们被确定为关键，以产品的改进：高音喇叭设计，交叉点和斜坡，中端和低音锥材料，施工和内阁。 Mirage claims their Pure Titanium
Hybrid (PTH) tweeter, which took two years to develop, is the \"first dynamic tweeter which can claim the transparency achieved with electrostatic or
ribbon designs while eliminating the sonic overhang typical of those designs.\"幻影要求他们纯钛混合素（ PTH ）高音喇叭，历时两年开发，是“第一个动态的高音
可以索赔的透明度达到或带静电设计，同时消除过剩的声波这些典型的设计。 ” According to Ian Paisley, the company\'s VP of Engineering, the new tweeter
consists of a feather-light, pure titanium 1\" dome on a cloth suspension system. The dome\'s low mass and rigid, close-tolerance shape is said to ensure
near-instantaneous response to signal inputs, while the cloth suspension eliminates post-signal resonances, or \"ringing,\" typical of other metal-dome
designs. Mirage feels their PTH has the fastest time-domain impulse of any tweeter over a full start/stop cycle. In addition, the new tweeter\'s voice-
coil is wound on the dome, which is said to result in low distortion, lowered fundamental resonance, and increased speed.据佩斯利，该公司的工程部副总裁，
The bass ports have also been re-engineered and enlarged for maximum efficiency and minimum vent turbulence (a type of distortion occurring when a large
volume of air is passed through a relatively small, circular port).低音港口也已重新设计和扩大的最高效率和最低发泄动荡（一种发生畸变时，大量的空气通过一个
相对较小，圆形端口） 。 They are also stair-stepped, \"in a manner approximating a ramp,\" to reduce or eliminate the chance of the grillecloth hitting the
rear baffle.他们还楼梯台阶， “的方式逼近设有坡道， ”以减少或消除机会的grillecloth触及隔板后面。 In the M-3si, internal volume was increased 12% without
significantly affecting the outside dimensions.在M - 3si ，内部体积增长了12 ％没有显着影响以外的层面。 The new speaker has also been tuned 3Hz lower.新的
发言者也已调整3Hz较低。
I was happy to see that the M-3si offers the provision for solid floor-coupling via ¼\" steel spikes, which can be threaded into steel inserts set in the
base. Taller, stronger spikes are available at extra cost for those (like me) who need additional clearance and strength. I was also glad to see the
plastic five-way binding posts used on the M-3 replaced with much stronger, gold-plated, hex-head, solid metal ones. There are two pairs, so bi-amping or
bi-wiring is possible. You can torque these babies down tight with a combination wrench; they won\'t squeal or crack. Just make sure the nut which holds
this assembly in place, located underneath the speaker, is good and tight. The fact that the posts are closer to the rear edge of the base also makes
cable connections a whole lot easier. Like the M-3, the M-3si is sold in mirror-imaged (\"handed,\" as JA would say) pairs, the left speaker\'s drivers
hugging the right edge of the cabinet; those for the right speaker hug its left edge.我很高兴地看到，在M - 3si提供提供坚实的地面耦合通过6.3 “钢铁穗，可
