Subwoofer 大測試, 必睇 (轉自西洋網站)

[luckybeanbean]

B&W: ASW850
B&W: ASW675

[tonytsui]

[初哥]

其實我連圖都唔識睇

[luckybeanbean]

大家睇得出有D subwoofer 開得大聲, 或者有大量LFE 輸入時係出唔倒低頻 (潛得唔低), 睇鈬只得MX-350 同 PCU 先pass, SVS 鰠超低頻就更加掂

[luckybeanbean]

Harmonic distortion: Many subwoofers have specifications that indicate they go down to some silly low Hz number. The truth is they never tell you how much distortion the sub is producing trying to reproduce the sound accurately. In some cases, the distortion can be astronomical!

中文話: 有D subwoofer 話就話出倒好低鮋HZ, 但出倒還出倒, 音色準確嗎? Distortion 數字大= 失真率高

[luckybeanbean]

其實我連圖都唔識睇

咁睇我寫乜啦

[luckybeanbean]

[米糕]

[luckybeanbean]

[luckybeanbean]

[luckybeanbean]

M&K mx-350 鰠 開大聲情況 50-40 hz開始以經有明顯失真, SVS PCU 就30HZ 以下先鈬料, 睇鈬Velodyne: DD-15 重好D, 其如subwoofer………蒜狗掃把啦….

[luckybeanbean]

Group Delay.

This is a measure of how the sub delays certain frequencies with respect to others. Typically the extreme bass will arrive at your ears (or our test mic) a few milliseconds after the rest of the frequencies and the extent to which this happens varies from sub to sub. The smaller and more consistent the group delay is across the frequency range, the better the sub should sound. If group delay becomes excessive it may be audible as 'slowness' in the bass or muddiness. For example, if the bass associated with a bass drum beat arrives after the 'thwack', it may sound ponderous and slow. If they arrive more or less in sync then it will sound 'tight'.

How much group delay is audible? Opinions are divided, but a good rule of thumb is that a time delay of between 1 and 1.5 cycles is just audible. So at 50Hz, group delay should be kept below 20ms (1000/50) and at 20Hz, it should be below 50ms (1000/20) to guarantee inaudibility.

中文話: 睇纒低音爽唔爽快, 50Hz 最好鰠 20ms 以下, 20Hz最好鰠50ms以下.
M&K MX-350 睇鈬最爽快, 應該關佢鮋設計事, 隻單元push-pull, 由頭到尾都咁爽
其他subwoofer都唔差, 但SVS 就弱D 喇

[Racingboy]

luckybeanbean 努力 ！

[luckybeanbean]

[luckybeanbean]