Scansonic MB 2.5B 评测：具备真实低频量感的纤薄落地式音箱

引言

Scansonic 是 Raidho 的姊妹品牌，后者是丹麦高端音响品牌，以铝带高音和碳纤维单元闻名，其旗舰型号一对售价约 20 万英镑。MB 2.5B 将这些核心技术带入一款专为更小房间和更小预算而打造的落地式音箱。

MB 2.5B 是一款 2.5 分频塔式音箱，高度略低于一米，白色或黑色一对售价 3,750 英镑，胡桃木版本为 4,500 英镑。它小到足以适配约 4.3 米乘 3.7 米的房间，却采用了 Raidho 家族更高阶型号上相同的编织碳纤维振膜材料和铝带高音技术。

结果是一款听起来明显比其纤薄箱体所暗示的更为庞大的音箱。它也是一款需要耐心的音箱，因为低频输出相当充沛，摆位决策在此比在大多数紧凑设计中更为重要。

Scansonic MB 2.5B 适合谁

MB 2.5B 在小到中等房间中最为合理。箱体窄而浅，因此占用极少地面空间，但低频输出远超这些尺寸所暗示的水平。想要落地式音箱的量感与存在感、又不愿使用笨重塔式音箱的听众，应该会觉得它非常合适。

对于这类音箱而言，它也异常容易驱动。标称灵敏度 88 dB、阻抗 6 欧姆，它能搭配每声道仅输出 8 瓦的 300B 胆机工作，前提是平均聆听音量保持在约 80 dB 以下。这为许多竞争对手难以驾驭的低功率胆机和甲类设计打开了大门。

这种设计也要求一些回报：摆位灵活性。MB 2.5B 对位置的微小变化很敏感，需要空间呼吸以收紧低频。无法将音箱移离墙壁、或坐在固定位置且无法调整内倾角的买家，很可能从要求更低的设计中获得更好结果。

对于追求低频解析力终极表现的听众，或想要铜管乐器及其他明亮、前倾录音最大真实感的听众，它并非显而易见的第一选择。

设计与制造质量

MB 2.5B 高度略低于一米，宽 178 mm、深 286 mm，每只重 15.4 kg，约 34 lb。白色或黑色一对售价 3,750 英镑，胡桃木饰面为 4,500 英镑。

以这个价位而言，做工异常考究。箱体置于机加工外伸脚座上，并略微后仰以实现单元时间对齐。两侧弯曲并向后方收窄，以减少内部驻波。主体结构为 MDF，前面板和顶板嵌有碳纤维以提升刚性，箱体内部也进行了大量加强支撑。

The driver complement is a two-and-a-half-way arrangement. A 130 mm, or 5 1/4 in, woofer at the bottom covers a stated 36 Hz to 500 Hz. An identical mid-woofer plays up to 2,600 Hz, where an in-house ribbon tweeter takes over. The woven carbon fibre cone material is inherited directly from Raidho and was chosen for high stiffness and low mass. It is a dust cap free design, which tends to reduce breakup modes at low frequencies. The driver uses a cast aluminium basket, an overhung magnet system favouring a long stroke over linearity, and an optimised spider and suspension to reduce losses. The mid-woofer is designed, developed, and built in-house.

The tweeter is also built in-house. It is formed from a Kapton and aluminium sandwich just 20 microns thick, with a moving mass of 0.03 grams, roughly 50 times lighter than a conventional dome. Sealed sides help it integrate cleanly with the mid-woofer.

Two practical details are worth noting. The bass port fires downward from a concealed opening in the base, a configuration that generally allows closer placement to room boundaries. On the rear panel, a single set of binding posts sits low down, keeping the back of the cabinet visually clean.

The design lineage is worth a mention. The original MB range was the work of Michael Børresen, which is where the MB initials come from, before he moved on to co-found AudioGroup Denmark. In 2019 the range was revised by Benno Baun Melgaard, current chief designer for both Raidho and Scansonic, and the models gained the MB-B designation.

主要优点：音质

MB 2.5B 是其价位上整理得最好的落地式音箱之一。它听起来干净，动态表现远超箱体尺寸所暗示的水平。声场和结像出色，乐器之间分离清晰，呈现宽广开放。

低频是最大的惊喜。它到来时带着权威感、量感和敏捷性，更接近一款有实力的书架箱而非小型塔式音箱的性格。这种从容取决于控制箱体共振，而加强支撑、碳纤维面板和收窄箱体都在此有所贡献。

铝带高音异常出色。高频有种可爱的空气感，精致度和时序在录制良好的素材上站得住脚，中频饱满且解析力强。整体平衡是无拘无束的高频，却仍能保持精致。

与其他音箱的比较

与售价 1,800 英镑的书架箱 Quad Revela 1 相比，纤薄的 Scansonic 在信息还原上不相上下，声场同样宽广开放，乐器分离清晰。两款音箱从人声和主奏乐器中提取的微妙音色都不如 ProAc Response 1SC。

在音色上，三者有实质差异。Revela 1 的中频比 Response 1SC 稍更前倾，但绝不激进。MB 2.5B 也将关键中频段比 Response 1SC 略微推前，但搭配了更松弛的中高频。这缓和了明亮录音的锐利感，代价是铜管乐器等的真实感有所损失。

与 Buchardt S400 相比，丹麦性格似曾相识：美丽开放的高频、自然且解析力强的中频、以及谦和的中高频。两者都产生令人印象深刻的声场，但 MB 2.5B 提供更大的低频量感和下潜，代价是表演者定位的确定性略逊。

The Neat Elite Classics, at 3,250 pounds in the UK, cannot match the Scansonic for deep bass or dynamics, though they offer similar midrange detail without the recessed presence region, along with a wonderfully revealing and civilised tweeter.

Compared with a 5,000 pound Audio Note stand-mount of transmission line design, the MB 2.5B is not as resolving in the low frequencies, and the Audio Note also has a little more resolution across the rest of the range. The equivalent Audio Note floorstander, however, sells for 9,000 pounds.

摆位、空间适配与功放搭配

The MB 2.5B produces more bass than its enclosure size suggests, helped by long-throw drivers and a second woofer covering 500 Hz and below. In a modest room, that makes placement the single biggest factor in performance.

To tighten the bass, the speakers needed to sit further into the room than most stand-mounts. Spacing them wider apart stopped the midrange from sounding thick, and toeing the tweeters in directly toward the listening position delivered maximum energy in the upper midrange. Small adjustments made an audible difference, and the effort paid off. Buyers without that flexibility should look elsewhere.

Amplifier matching is refreshingly forgiving. The speaker is easy to drive, and its impedance curve appears fairly flat, with no unusual electrical phase angles. A 300B amplifier producing 8 watts per channel sounded gloriously open and rich in detail at moderate levels, and it never turned soft. An Exposure 2510 integrated maintained its composure where many speakers at this level strain its modest power supply, including the Quad Vena One and the ProAc Response 1SC.

More power is available from something like the Hegel H190, which adds grip and control. That may help in larger rooms at high playback levels, but in a small room at moderate levels the improvement was marginal. Moving up to an Exposure 3510 preamp and monoblock pairing produced a clearly better result.

购买前需考虑的事项

Positioning sensitivity is the main caveat. The MB 2.5B is not a speaker to drop into a fixed spot and forget. If the room does not allow the cabinet to come out from the wall, or the listening seat cannot be adjusted, a more forgiving design will deliver better value.

The polite upper midrange is a deliberate trade-off. It makes poor or bright recordings easier to live with, but it also removes a little realism from brass instruments and similar material.

The bass, while impressive, may be at the limit of what a small room can absorb. Listeners in compact spaces should expect to spend time tuning placement rather than simply turning the speakers loose.

Finally, low-frequency resolution is good but not class-leading. Designs at higher prices dig deeper into bass detail, and a 5,000 pound transmission line stand-mount offers more resolution across the range.

购买建议

At 3,750 pounds a pair in white or black, and 4,500 pounds in walnut, the MB 2.5B sits in a competitive part of the floorstanding market. What sets it apart is the combination of a genuinely small footprint, careful cabinet engineering, and bass performance that most slim towers cannot approach.

Pairing is straightforward. A modest integrated amplifier, or even a low-power valve design, will get strong results at moderate listening levels. Extra power helps mainly in larger rooms and at higher volumes, so there is little need to over-invest in amplification.

The real budget line is room setup. Factor in the space to move the speakers well clear of the wall behind them, spread them wider than a typical stand-mount, and angle them toward the listening position. Buyers who can do that will hear a speaker that punches well above its size.

结论

The Scansonic MB 2.5B proves that looks can be deceiving. An ultra-slim tower with relatively small carbon mid-woofers and a ribbon tweeter is neither bright nor weedy. Bass is deep, weighty, and articulate, the midrange is full and resolving, and the highs are gloriously unbridled while staying refined.

The trade-offs are clear and manageable. It is finicky about positioning, and its polite upper midrange sacrifices a little realism for the sake of forgiving bright recordings. Buyers who can work with those characteristics, and who have the room to place them properly, will find one of the finest sounding speakers available for the money.