Wharfedale SW-150 Subwoofer Repair 

Brilliant fix sounds good Reece well done

很實用的影片! 我認為這是很多重低音箱的通病，當然我的也是如此。當我更換繼電器後並沒有完全改善，應該不只是繼電器損壞，似乎還有另一個問題，或是有其他零組件故障了。我現在的問題是開機後，如果只是關閉電源開關再打開，完全沒有反應，連待機的紅燈也不會亮。而是要拔除電源線一段時間後再接上電源才有機會亮綠燈正常作動，音箱無法每次都能正常作動，請問你知道是什麼原因嗎?

I have the same sub. Mine only works if the volume and frequency dials are in certain positions. If you press/wiggle the dials the sounds gets interrupted. Any idea on what I can do to fix it?

Mine has an issue where the sound gets distorted quite badly after about 10% volume. I've tested the driver on its own, and the driver isn't the cause. Any ideas?

Thank you for video - my SW150 has buzzing relay - one question what is the value of the green cap in video.

Thank you for the video, mines done the same.

Looks like a dodgy batch of relays, mine has done the same, thanks for uploading.

In a lot of instances, these SW150's can work again by just replacing that blue relay.

Great video - very clear. Quick question: do you know the ohms of the driver? I want to update mine as it clicks (don't used to, but sent to much bass though it). Wharfedale will sell me a replacement driner but I want a higher wattage rated driver. Every time I ask the question (my gut tells me it's 4 ohms) they avoid confirming or denying, and just try to sell me the replacement 10" driver. I have a normal multimeter, but it doesn't show a meaningful reading on resistance across the disconnected speaker terminals. I'm sure I'm being dumb here - any help is appreciated.

Hello do you know what type of transformer have the sub? Mine is shorting always blowup fuse t6.3 . Thank you

How did u get 2 screw out blocked by the 2 huge caps?

Think I’ve sort of confirmed my suspicions of the auto power feature causing the relays to blow. I had it up loud and muted the input, after unmuting the main amp brought the output up nice and slow. The sub however thudded on at high volume, I’ll remember not todo that in future with this one 🥲

How cannyou remove amplifier board from heatsink?

Seems like this is the issue with mine gonna have to repair

Is it possible to bypass the Auto on/off switch by soldering a wire?

Hi, I have the same subwoofer and mine only works in normal mode, with the auto power switch OFF and the subwoofer permanently ON. If I try switching to Auto Power mode ON, it doesn’t work. With the subwoofer ON, with incoming signal, it works for a couple of minutes and then it turns off (standby). And then in standby, it doesn’t turn ON when a signal is detected. What can I do?

Hi Reece, where are you based? I have the same sub, turns on but no sound.