JBL Classic 系列电子器材评测：SA550、TT350、MP350 与 CD350

引言

JBL 数十年來一直打造音响器材，而 Classic 系列将这段历史延续到现代组件之中。这个电子器材系列的设计语汇取材自 1960 与 1970 年代的高传真音响：木质侧板、铝质面板，以及一个会发光的 JBL 惊叹号标志——开机时泛着红光，脱离待机状态时转为橙色。这样的造型源自 1960 年代的 JBL SA600 综合扩大机。

该系列共有四款型号：SA550 综合扩大机、TT350 黑胶唱盘、MP350 串流播放器以及 CD350 CD 播放器。它们可以堆叠成一套匹配的系统，但每一件器材本身都有独立的价值。本指南将逐一说明每款器材的优点、限制所在，以及各自适合什么样的用家。

JBL Classic 系列的定位

这个系列的每一件器材都共享相同的设计语言：木质侧板、铝质前面板，以及相呼应的复古风格按键。串流播放器是例外，前面板完全没有按键。这些器材握在手里颇有份量；尤其是扩大机的旋钮，转动起来扎实而有阻尼感，整个系列的按键也都有类似的手感。设计目标是在内部采用当前音响技术的同时，向外呼应数十年前做工精良的器材。

这样的组合正是这个系列值得一看的原因。想要 Vintage 系统的温暖韵味、却不想承担五十年老组件的维护负担的买家，可以得到一套全新且彼此匹配的电子器材。

JBL SA550 综合扩大机：系统核心

The SA550 is the heart of the system and, for many buyers, the most interesting piece. It uses the same ESS DAC chip found in the larger SA750, and the converter is only part of the story: the supporting electronics and power supply matter just as much, and the SA550 is built around them.

Its output stage uses Class G, a design that runs in pure Class A at low demand and switches to Class AB when more power is needed. In practice that means 10 watts per channel of Class A output for ordinary listening, rising to 90 watts per channel into 8 ohms and 150 watts into 4 ohms when dynamic peaks arrive. The appeal is efficiency without giving up the character of Class A at normal levels.

Connectivity is broad for a two-channel amplifier. There is a moving magnet phono input for a turntable, three rear aux-type inputs, two coaxial and one optical digital input, and a front mini-jack aux input alongside a headphone output. Any of the three rear aux inputs can be set to processor bypass, so an AV receiver can drive the front channels through the SA550 while volume control stays at the receiver. There is no HDMI ARC connection; a TV can be connected over optical instead, and the digital clock’s locking frequency can be adjusted to address optical output quirks from some televisions. Bluetooth uses high-res aptX Adaptive and remembers up to five sources. A set of preamp outputs is available for a separate power amplifier or, more commonly, a subwoofer.

JBL TT350 黑胶唱盘：复古外表的直驱设计

The TT350 pairs a brushed aluminium faceplate with a walnut plinth and the same button set as the rest of the line. It is a direct-drive design with a heavy platter that carries a thick perimeter-weighted ring, and the inside of the platter is well damped. Adjustable feet provide a degree of isolation from the surface it sits on.

The S-shaped tonearm has bearings that feel free of play, and the headshell connection is tight and solid. Tonearm height is adjustable, which matters if you later move to a different cartridge. A moving magnet cartridge from Audio-Technica is pre-mounted, drawn from a family of models that share the same cartridge body, so upgrading can be as simple as fitting a better stylus.

Two practical notes. No alignment gauge is included for the removable headshell, so a gauge is worth adding if you plan to change cartridges. And lowering the cue lever quickly can let the arm drift slightly backward before it settles, so the stylus may not land exactly where you aimed.

在聆听过程中，这款唱头在困难的乐段依然循轨良好，在以空白测试唱片播放时也听不到马达噪音。以其价格而言，音质表现站得住脚。

JBL MP350 串流播放器：匹配的网络播放机

The MP350 shares the wood side panels and aluminium front of the rest of the line, with a small display window and no front buttons. It supports AirPlay 2 and Chromecast for quick setup, along with Spotify Connect and Tidal Connect with MQA. Roon is listed as supported, though Roon functionality was not yet enabled at launch and was expected to follow. The internal DAC handles up to 24-bit/192 kHz.

One setup detail is worth knowing in advance: the digital output is not active by default and needs to be switched on in the menu before the streamer will feed an outboard converter. Once connected, the recommended path is the coaxial digital output into the SA550, because the amplifier’s DAC is the better of the two. On a network, the MP350 appears quickly as an AirPlay device.

As a streamer it performs well and matches the amplifier cosmetically, which is likely to be the main reason buyers pair the two. If a future upgrade to a more expensive streamer is likely, there are options at every price and quality level.

JBL CD350 CD 播放器：实力坚强的转盘

The CD350 looks like a conventional CD player, and plays red book CDs as expected. It also handles ripped WAV, FLAC and MP3 files from disc, and the same file types from a rear USB port. Sample rates of 32, 44.1, 48, 88 and 96 kHz are supported, so playback is not limited to standard CD resolution. The disc drawer has a solid, well-made action.

Digital outputs include both coaxial and optical, which lets the SA550 handle conversion. The internal DAC and digital circuitry are good, but the amplifier’s converter is better, so the digital connection is the one to use in a matched system.

作为转盘，CD350 表现强劲，节奏感完整保留，让人听得投入。

整套系统搭配时的表现

驱动一对 JBL 4367 喇叭——这对喇叭的分析力足以迅速暴露缺点——这套组合依然稳得住。音像精准而稳定，即使搭配较大的喇叭，低频依然紧实受控。Class G 输出级是最突出的部分：在一般音量下平顺且富有音乐性，即使用力催到从 Class A 切换到 Class AB，依然从容不迫。

当各件器材以数字方式连接时，有一个使用上的注意事项。SA550 的输入列表很长，而且无法移除未使用的输入，所以要选中正确的输入得多滚动几下。这算是小小的不便，而非真正的限制。

购买建议：哪些器材值得入手

如果你只打算选一件，SA550 是自然的起点。以它的价格而言，它提供了极多价值：一部有实力的 DAC、灵活多变的 Class G 输出级、唱头与数字输入，以及足以驱动多种喇叭的功率。CD350 是另一个突出之选，作为转盘连接扩大机的转换器时表现出色。

TT350 适合想要一部直驱唱盘、视觉上与整套系统匹配、开箱即可播放，并且能通过唱头系列清楚升级的买家。MP350 是优秀的串流播放器，外观上也是明显的配对首选，不过它的数字输出应该连接到 SA550，而非依赖内部的 DAC。

整体来看，这四件器材以今日市场行情而言定价适中，且共享一致的外观，无论摆放在 Vintage 喇叭或现代 JBL Classic 喇叭旁边都很协调。

结论

Classic 系列成功做到了它当初设定的目标：为现代电子器材披上复古外衣。SA550 与 CD350 以性价比而言是最强的成员，而 TT350 与 MP350 则补全了一套没有明显弱点的匹配系统。想要一套有个性、具备当前连接能力且操作直接的两声道系统的买家，会在这里找到不少值得欣赏之处。