[開箱] 尋聲 XS03

pallee

下載 (107.78 KB)

2019-6-10 12:26

下載 (115.43 KB)

2019-6-10 12:26

pallee

完全是枱擴線路設計和用料

DAC
AK4493 x 2, mono mode for each audio channel

LPF
THS4151 x 2, they are also the differential amplifiers, convert 8 channels (from two 4493) to 4 channels (L+, L-, R+, R-)

VAS
OPA1612 x 2, voltage amplification stage

Output stage
8 x BJT in 4 pairs push pull class A, current amplification

pallee

It can drive up to 300 ohm headphones. On 600 ohm headphones, output power is not enough. Test was done on 3.5 mm stereo port. I will test it again on 3.5 mm balanced port later.

1543

謝謝分享，看來非常不錯。

pallee

它的線路設計與日系的枱擴 (Pioneer, Teac) 很相似, 但用了 class A output stage.

I am not a big fan of class A. I know class A drawbacks. I like class AB more.

philipsrev

唔知同紫珊比較如果？

pallee

回覆 7# philipsrev

Not at the same level. You cannot compare a DAP with a desktop headphone amp. XS03 has a complete different analog circuit design (differential amplifier, voltage amplification stage, push pull power transistor output stage).

But I worry about the battery life. Such a design is power hungry.

I think XS03 is good for buyers without a desktop DAC and headphone amp. It serves 2 purposes. You can use it at home and on the walk both. At home, you can use AC adaptor for long playing time.

I don't want to write a review now because I have not tested it with 600 ohm headphones. I am still waiting for my 3.5 mm balanced cable to come.

leungleung1234

回復 8 #pallee

我比較有興趣想知可不可以直接將3.5平衡線插過3.5單端位，我記得尋聲部FA2唔支援，結果要轉插要可以係3.5單端位支援3.5平衡線。

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