值得入手的高性價比國產擴音機：五款平價 Hi-Fi 擴音機比拼

引言

要以便宜的預算踏入 Hi-Fi 世界，現在幾乎是最好的時機。一部質素不錯的兩聲道擴音機售價可由約 $60 起，雖然這個入門價位通常代表只有單一輸入、沒有音調控制，但仍然能輸出可用的功率，聽起來也確實令人享受。季節性減價往往會把這些價格推得更低。

這次比拼的五款擴音機全都屬於這個平價範疇。每一款都有明確的存在理由，同時也各自帶著一些值得在花錢之前先了解的取捨。

平價擴音機為何值得考慮

便宜只是故事的一部分。另外兩個因素同樣重要：擴音機佔用多少空間，以及盒內實際上裝了什麼。

小巧的 class D 設計改變了小型擴音機的可能性。它們的運作效率遠高於傳統 class A/B 設計，這代表它們產生的熱量極少，同時仍能從小得足以放在書桌上、塞在電視背後，或安裝在書架旁邊的面積中輸出可觀功率。對於音響架空間不足，甚至根本沒有音響架的人來說，這種靈活性是實實在在的優勢。

元件方面比許多買家預期要好。這些器材內的擴音晶片通常來自 Texas Instruments 或 Infineon，而運算放大器、Bluetooth 晶片及 DAC 晶片則經常來自美國或歐洲供應商。電路板與外殼可能在中國組裝，但訊號路徑往往圍繞著口碑良好的晶片來搭建。

接著是功率，而這正是各種宣稱需要被嚴格審視的地方。有些廠商以 10% 總諧波失真來標示輸出，這並非可用的數字；另一些則完全不公佈失真數字。要確實知道一部擴音機的實際輸出，唯一可靠的方法就是在它開始削波的那一點進行測量，因此應把公佈的瓦數視為起點，而非承諾。

AIYIMA A03：最佳一體化之選

The AIYIMA A03 is the most complete package in this group at around $130. It combines an integrated amplifier with a built-in DAC, Bluetooth input, a subwoofer output, and a remote control. That is an unusual amount of functionality at this price, and it delivers usable power while sounding good in everyday listening.

For anyone replacing a soundbar or building a first desktop system, the A03 removes the need for a separate DAC and keeps the cable count low. The subwoofer output also makes it straightforward to add a powered subwoofer later without changing the amplifier.

AIYIMA A07：機身小巧，電源可升級

The AIYIMA A07 takes a different approach. It is a very small amplifier that can be placed almost anywhere, and its power supply is external, which opens up an upgrade path: fitting a more powerful 48V 10A power brick can increase the available output. That makes the A07 appealing if you want a modest entry price now and more headroom later.

The trade-off is that the supplied power brick limits output until it is replaced, and the upgrade depends on sourcing a suitable 48V 10A unit. If your speakers are reasonably efficient, the base configuration will likely be more than enough for everyday listening.

AIYIMA A08 Pro：同一方程式，換來更大餘裕

The AIYIMA A08 Pro sits alongside the A07 in the same design family. It also uses an external power supply, and the same upgrade applies: a 48V 10A power brick can be substituted to raise the available output. If you want a compact amplifier with a documented path to more power, both models belong on your shortlist.

As with the A07, the higher output only arrives once you move beyond the stock power supply, and published wattage figures should be treated with caution until you hear the amplifier with your own speakers.

Fosi Audio TB10D：願意聆聽用家意見的品牌

The Fosi Audio TB10D is the clearest example of why this category keeps improving. The first generation of this amplifier did not perform well, and the brand responded directly: it acknowledged the criticism, revised the product, and sent out an updated version. The revised TB10D sounds great.

That kind of responsiveness matters more than any single specification. Not every brand in this space reacts to feedback this way, but some do, and it is one reason the quality of affordable amplifiers has been improving steadily. Buyers should simply confirm they are getting the revised version rather than old stock.

Topping PA5：關於品質控制的提醒

The Topping PA5 is a useful reminder that reliability is not guaranteed by brand name. On one unit, a TRS input came loose. It is a small defect, but it is exactly the kind of issue that can appear on any amplifier in this category.

The PA5 uses balanced TRS inputs, which offer flexibility when pairing the amplifier with a range of sources. Buyers considering it should weigh that connection flexibility against the reality that quality control varies across the category, and that a generous return window is the best protection available.

入手前要檢查的事項

幾個實際的檢查步驟，可以決定你得到的是良好體驗還是令人沮喪的經歷。

向退貨政策寬鬆的零售商購買。這一個決定就能涵蓋這個類別的大部分風險。假期購物往往會把退貨期限延長至一月下旬，讓你有更多時間好好試聽擴音機。

客戶服務是另一個需要預先考慮的變數。有些品牌處理問題妥當，另一些則可能反應遲緩，而語言障礙或面對批評時的防衛態度，會令一個簡單的故障變得比應有的更難解決。

擴音機送到之後，把首 30 天當作試用期。搬動它、轉動旋鈕、按動開關，確認沒有東西鬆脫。用你自己的喇叭，以你實際使用的音量來聆聽。如果有問題，就退貨。

然後在入手前廣泛閱讀。社群討論很快會浮現出重複出現的問題，如果某個型號有某種故障模式，那個模式通常會在討論中顯現。這個類別曾有人報告的問題包括喇叭接線柱鬆脫、RCA 輸入左右顛倒、某些輸入出現不明原因的喀噠聲，以及廠商在保持同一型號編號的同時悄悄更換晶片組。型號編號混亂也很常見，因此要確認清楚你買的是哪一個版本。

結論

平價擴音機市場值得比它平時所得的更多肯定，而這五款型號正好說明了原因。AIYIMA A03 把 DAC、Bluetooth、超低音輸出及遙控器濃縮在約 $130 的套裝內。AIYIMA A07 與 A08 Pro 提供小巧體積，並可透過更大功率的電源實現明確的升級路徑。Fosi Audio TB10D 展示了當一個品牌認真對待用家意見時會發生什麼。Topping PA5 則說明了為何良好的退貨政策依然重要。

在這個價位，耐用程度是個合理的疑問，而誠實的答案是：一部受到妥善對待的平價擴音機可以提供多年服務，只要不被濫用，五至十年是實際可期的。向讓你退貨的零售商購買，在首個月徹底測試，最終讓自己的耳朵作出決定。