hum

A hum is a sound made by producing a wordless tone with the mouth opened or closed, forcing the sound to emerge from the nose. To hum is to produce such a sound, often with a melody.
A hum has a particular timbre (or sound quality), usually a monotone or with slightly varying tones. There are other similar sounds not produced by human singing that are also called hums, such as a sound produced by machinery in operation or by an insect in flight. The hummingbird was named for the sound that bird makes in flight.

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  1. L

    Question New speakers and amp...left speaker has no sound at low volume besides a hum?

    I want to preface, I am very new to all of this. I recently purchased a set of Sony SSCS5s and new Aiyima AO7 Pro. I wired them last night and noticed that at very low volume only the right speaker plays sound while the left speaker hums. So it's getting power but it is not playing music. I...
  2. I

    Subwoofer hum

    Hi all. I have a kef psw2010. I haven’t used it for a few months. A few weeks ago I turned it on and realized there is a him that’s quite loud. After about a few minutes it stops on its own and the subwoofer works perfectly. Even removing the rca input still leaves the hum which then stops...
  3. GiganticDays

    Question AXA 25 Hum

    A year or so ago I bought a Cambridge Audio AXA 25 amp to connect with a Denon DP297 turntable and a pair of Wharfdale Diamond 9 speakers. The amp gives off a slight buzz when powered on even when nothing is connected. TBH I'm not sure if it's always done it or if it's just started, it's not the...
  4. K

    Sub hum

    Hey guys over the last week or two I’ve noticed that when I turn my AVR off my sub starts to hum, if I unplug the RCA cable from the AVR the hum gets slightly louder, or if I unplug the RCA cable from the sub the hum stops completely. What should I be doing/looking at to find the cause of the...
  5. M

    Question Connecting turntable to phono or not?

    When I connect my Rega Planar Plus 1 to phono, I get lots of distortion and hum, it’s unplayable. I tried using a secondary piece of wire to ground the turntable as suggested on some you tube videos but that didn’t work, neither did moving it to a different position. So I connected to another...
  6. D

    Is it normal for a subwoofer to sound like this?

    Subwoofer audio clip Hi, so I recently got a whaferdale sw150, and I’ve noticed when turning it up over half way that the sound of any deep bass actually decreases in volume and can sound particularly strange, I was wondering if this could be normal? Perhaps I’m just turning it up too loud...
  7. Kevo

    Sennheiser MKE400 MK2 Mic and Mains Hum

    I have an issue with the MKE400 MK2 microphone. When using the mains to power my cameras (Panasonic Lumix S5 or Fz2000) the mic picks up a loud humming noise on all 3 db settings on the mic and if i change the camera steiing to pwer the mic internally or not. It's ok when using batteries. My...
  8. A

    Yamaha RX-V373 Vocal hum

    Some time ago I ditched the sound system for a soundbar, and it's been fine. But a few weeks back, I brought all the items out of the loft and set everything up again. And I have a strange issue with deep voices. Whenever there is a deep voice, it causes a strange and horrible low buzz from the...
  9. Jai426

    Hum from Fibre Optic HDMI

    Hi all, hoping someone can help. I have a home setup with a JVC x7900 projector linked to a Denon AVR X4500 home cinema amp via 15ft of Fibre Optic HDMI (RuiPro). This drives am Atmos setup perfectly fine with no issues. The setup is also connected to my LG OLED and Pioneer UDP both normal...
  10. T

    RCA to XLR cable: sub hum

    I've got a DIY sub running off of a Behringer NX6000 and I've got pronounced hum. The amp is connected to my AVR with an RCA to XLR cable, and if I unplug the RCA from the AVR the hum stops. I presumably have a ground loop, but I don't know what's causing it, and wondered whether I should try a...
  11. S

    Cyrus One Cast Hum

    I've been on a bit of an upgrade splurge recently. My initial system was built around a Denon X2000 but I no longer needed the AV\surround capabilities so picked up a Marantz PM6006, neither of these had any notable hum or hiss. I've not replaced the Marantz with a Cyrus One Cast as I missed...
  12. P

    Question Turntable hum through one channel.

    I’ve just been rebuilding my Pro-next 1xpression with a granite plinth. It’s worked fine for a couple of weeks but today has developed a loud hum through the left channel. When I swap the inputs at the amplifier the problem switches to the right channel. I’ve tried my daughters turntable through...
  13. PLDS

    Subwoofer hum

    Hi! I have a Denon AVR-X1300W amplifier along with a pair of Klipsch bookshelf speakers and a Klipsch R-100SW subwoofer. I just into a new house and upon setting up my system, I notice that my subwoofer is producing a low volume bass like sound (I suppose that's what humming is). If the...
  14. NdG1977

    Question Subwoofer amp mechanical buizz

    Hi Guys, I just put back at work my old surround system (nothing impressive, but that's available): JBL 5.1 SCS175 H/K AVR1550. It still works, and that's already something, but I have a problem with the active subwoofer that keeps buzzing, it's not loud, but in the evening is noticiable and...
  15. Richard Harnwell

    Question Focal Dome hum. Goes away when I touch phono input & body

    The sub in my 5.1 Focal Dome system has recently started to hum, even when not connected to a receiver (not even a lead plugged in). It increases with the volume knob. I’ve tried different mains leads but no difference (I notice it has no earth/ground. I’ve tried it via other mains sockets and...
  16. W

    Going crazy - mains hum

    Sorry it’s another one of those threads! My issue is slightly different as no turntable is involved! I’m running a Naim Nait XS3 into Spendor A7s. With the amp switched on, interconnects plugged in, but CD player OFF at the mains no hum. As soon as I switch the mains switch on for the CD player...
  17. A

    Question Rega RP3 hum. Help please

    Hi guys, how are you? I hope everyone is safe. I am having a horrible hum with my turntable. Please check the link below where I posted the video with the problem so you can have an idea. As you can see, the hum disappears when the tonearm is moved to the center of the table. So far, I haven’t...
  18. breeps

    Question Xls 200 mk2 pulsing hum - intermittent

    I setup my new xls 200 mk2 today. Have noticed quite a prominent hum. It pulses, and isn't all the time. The sub is plugged into a smart strip (3 way) along with amp and cooling fan. I'm a novice, what is the likely cause? Is it worth plugging the sub into its own outlet? Or could it be that the...
  19. W

    Turntable background hum

    Hi I have a quick question. I have just got back into vinyl via a Planar 3 thru an ArcamSA20 and delighted with the matchup. One thing I have noticed is that there is a bit of background hum present when no music is being played and the amp is set at higher volumes. I pulled the phono cables...
  20. L

    Question New TT hum -is this normal?

    I really could do with some help. I’m not technical above plugging in and turning on. I purchased a demo Thorens TD350 Turntable which came with a 1 year warranty after reading some good reviews. I have connected it up to a new Arcam SA30 which when connected together, results in a very...
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