Need help

WillowWillow Posts: 8,720
Been listening to records and when I turn it up I get reverberation kind of like driving with only one rear window open. Nasty! What can I do?

Thanks guys. I'm assuming I have to isolate the tt
2Ch- B&W 703, SVS PB10 NSD, Marantz NR1607(pre), Parasound 1500a, Pro-Ject Debut Carbon (Yellow) with Acrylic platter, Pro-Ject phono pre, MIT AVT 2 speaker cables, MIT AVT 2 ICs, XLO Jumpers, Tributaries Optical, Signal Cable Magic Power Cables x3, Samsung 55JS7000, Harmony 1100, Sony BDP-S6200, Rotel RDV 1045 (as Transport), Cambridge Audio DAC Magic100, Monster 3600MKII and Android MXQ Amlogic S805 Media player. - Pool /Gazebo Yamaha RX-A1010, Rotel 1075, Polk Patio 25x4, MIT AVT3 ICs

Comments

  • nbrowsernbrowser Posts: 6,762
    edited June 16
    Sounds like the old fashioned subsonic/rumble filter is required here.
    Living room: Samsung UN55KU7000 4K UHD HDR 55 inch TV, Marantz CD6004, Pro-Ject Debut Carbon, Parasound zPhono, Mac Mini, Oppo BDP-93, XBox One S 2Tb, Kenwood DPX792BH car deck for radio purposes, Marantz SR5010 AVR, Parasound HCA-1200II, Front SDA 2 modded with Larrys Rings and RD0-194-1 tweeters, Rear Onkyo SKF-4800 Towers, Center CSiA6, BOOM Tannoy TS2.12 Sub, Audioquest Evergreen interconnects just about everywhere except from AVR to amp, MIT Terminator 4, MIT AVT3 speaker cables with extra terminals covered up Monitor 5 Jr+ in the wings for a center channel.
  • mhardy6647mhardy6647 Posts: 14,814
    As described, sounds like acoustic feedback.

    You can try this -- with the platter stopped, lower the stylus onto a record on the tt at zero or low volume. Slowly turn the volume up and see if it starts to "rumble' (so to speak). If so, that's definitely acoustic feedback. If not -- it still might well be.

    Problem could be "just" isolation, but it may well be exacerbated by arm mass/cartridge compliance mismatch.
    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

  • gimpodgimpod Posts: 1,683
    Good isolation platform/feet can help with that also.
    "If you design software that any moron can use only morons will use it." JMO
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  • WillowWillow Posts: 8,720
    I'll have to look into it. Thanks guys. I'll look into some feet to start.
    2Ch- B&W 703, SVS PB10 NSD, Marantz NR1607(pre), Parasound 1500a, Pro-Ject Debut Carbon (Yellow) with Acrylic platter, Pro-Ject phono pre, MIT AVT 2 speaker cables, MIT AVT 2 ICs, XLO Jumpers, Tributaries Optical, Signal Cable Magic Power Cables x3, Samsung 55JS7000, Harmony 1100, Sony BDP-S6200, Rotel RDV 1045 (as Transport), Cambridge Audio DAC Magic100, Monster 3600MKII and Android MXQ Amlogic S805 Media player. - Pool /Gazebo Yamaha RX-A1010, Rotel 1075, Polk Patio 25x4, MIT AVT3 ICs

  • gmcmangmcman Posts: 821
    My TT did that when I had it my Bell'O A/V rack with other components.

    Once I used a dedicated stand it went away.

    Also, what you're hearing could also be from the lid (if you have one) if it's closed while listening, or even open..most are removable.
  • WillowWillow Posts: 8,720
    gmcman wrote: »
    My TT did that when I had it my Bell'O A/V rack with other components.

    Once I used a dedicated stand it went away.

    Also, what you're hearing could also be from the lid (if you have one) if it's closed while listening, or even open..most are removable.

    Thanks I'll also try the lid
    2Ch- B&W 703, SVS PB10 NSD, Marantz NR1607(pre), Parasound 1500a, Pro-Ject Debut Carbon (Yellow) with Acrylic platter, Pro-Ject phono pre, MIT AVT 2 speaker cables, MIT AVT 2 ICs, XLO Jumpers, Tributaries Optical, Signal Cable Magic Power Cables x3, Samsung 55JS7000, Harmony 1100, Sony BDP-S6200, Rotel RDV 1045 (as Transport), Cambridge Audio DAC Magic100, Monster 3600MKII and Android MXQ Amlogic S805 Media player. - Pool /Gazebo Yamaha RX-A1010, Rotel 1075, Polk Patio 25x4, MIT AVT3 ICs

  • mhardy6647mhardy6647 Posts: 14,814
    edited June 19
    The lid (dustcover) is a good suggestion -- they can do (much) more harm than good. This might well be why many, many of the better turntables don't include one, and don't even have provision for one. EDIT There's even a cottage industry of aftermarket dust covers for tts that don't offer them and don't lend themselves easily to a 1970s style dust cover!

    Want to keep dust off your tt when it isn't in use? Throw a lightweight but tight-weave piece of cloth over it. Or fabricate (or buy) a nice one made of acrylic or polycarbonate. Or even use a cardboard box :)




    http://coloradoplastics.com/polycarbonate-lexan-vs-acrylic-lucite/
    "Some amps run on self bias, some amps run on fixed bias. But his amps run on confirmation bias." -- seen on audioasylum

  • msgmsg Posts: 3,324
    lightweight being the operative descriptor here.
    I broadcast a painters canvas once - once - and snapped the tonearm.
    mhardy6647 wrote: »
    Want to keep dust off your tt when it isn't in use? Throw a lightweight but tight-weave piece of cloth over it. Or fabricate (or buy) a nice one made of acrylic or polycarbonate. Or even use a cardboard box :)
  • WillowWillow Posts: 8,720
    msg wrote: »
    lightweight being the operative descriptor here.
    I broadcast a painters canvas once - once - and snapped the tonearm.
    mhardy6647 wrote: »
    Want to keep dust off your tt when it isn't in use? Throw a lightweight but tight-weave piece of cloth over it. Or fabricate (or buy) a nice one made of acrylic or polycarbonate. Or even use a cardboard box :)

    Ouch!
    2Ch- B&W 703, SVS PB10 NSD, Marantz NR1607(pre), Parasound 1500a, Pro-Ject Debut Carbon (Yellow) with Acrylic platter, Pro-Ject phono pre, MIT AVT 2 speaker cables, MIT AVT 2 ICs, XLO Jumpers, Tributaries Optical, Signal Cable Magic Power Cables x3, Samsung 55JS7000, Harmony 1100, Sony BDP-S6200, Rotel RDV 1045 (as Transport), Cambridge Audio DAC Magic100, Monster 3600MKII and Android MXQ Amlogic S805 Media player. - Pool /Gazebo Yamaha RX-A1010, Rotel 1075, Polk Patio 25x4, MIT AVT3 ICs

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