How hot do you run your sub

Discussion in 'Subwoofers' started by angliaboy, Nov 15, 2018.


    1. angliaboy

      angliaboy
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      I have learned that it doesn't matter which sub I tend to use, I like a lot of bass. Audyssey always tends to set the sub at around -7db or something whereas I tend to run at between +5.5db to +7db , am I the only one like this?. I figure I have some headroom as my main listening volume doesn't tend to go over -15db and that's only when everyone goes out (not often) and the subs gain is only on halfway too.

      So I just wanted to ask am I just a basshead or do other people run their subs like this too, or hotter even?
       
    2. paulst10

      paulst10
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      Hi, so you run between 12db & 14db hot? WoW! that's pretty hot. What subs are you using?

      Also are you using Dynamic EQ? As DEQ applies quite a hefty boost on its own could mean you're running around 20db hot if you have that enabled also..
       
    3. angliaboy

      angliaboy
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      Well the lfe channel says +5.5db so I'm not sure how that translates to +12b as you mentioned above?

      Also as mentioned the subs gain dial is on halfway so I'm hoping there is some headroom there?

      Dynamic eq has been on previously but can't remember the last time I tried my system with it off, didn't know it boosted the lfe to be honest, I just thought it brought the vocals up at night time when you make the overall level quieter for the kids etc and also regulated the volume when swapping channels/or a different input

      Edit: Used to run a bk xxls400 but just finished A DIY 18" sealed which sub is why I thought to ask the question
       
      Last edited: Nov 15, 2018
    4. DodgeTheViper

      DodgeTheViper
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      If that’s your preference then that’s your preference. I would suggest that it wouldn’t be particularly balanced though or there’s something wrong somewhere.

      It’s certainly out of the ordinary scope of things. A lot of us like a lot of bass but that usually goes up to a point.

      If it’s your thing though :thumbsup:
       
    5. angliaboy

      angliaboy
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      Yes i think I must need more subs then :)

      I was only asking as I don't want to damage anything by ramping it up too much (thankfully not blown a sub or amp yet) - what do everybody else's settings look like in regard to gain dial and LFE channel level?
       
    6. DodgeTheViper

      DodgeTheViper
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      It’s because you’ve upped the trim from -7db to +5db. That equates to +12db
       
    7. paulst10

      paulst10
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      Hi, if Audyssey set the sub to -7db, going from -7db through to +5db is a 12db boost (6,5,4,3,2,1,0,1,2,3,4,5) Which is quite high and even higher if Dynamic EQ is ON as that applies variable boosts depending on frequency (IIRC between 3-8db as frequency descends)

      I usually run around 4 or 5db above Audyssey settings with Dynamic EQ turned off. Unless you have a wall of subwoofers, or at least subwoofers with built in limiters, I'd back off the boosts quite a bit and just turn the volume up :devil:
       
    8. paulst10

      paulst10
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      Out of curiosity, you don't have Dynamic Volume on do you? This could be the reason you need to run that hot as it essentially compresses the dynamic range, should be set to OFF..
       
    9. angliaboy

      angliaboy
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      Oh! - learn something new everyday

      As you happen to mention it, Dynamic Volume has been on, so I shall turn that off and re run audyssey with the new sub and be careful on the boost.

      Thanks for your help guys
       
    10. paulst10

      paulst10
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      Yes you should rerun Audyssey if you ever change your sub. After the calibration has finished, be sure to set Dynamic Volume OFF when asked. Dynamic EQ isn't too bad if you usually listen at lower volumes though and could be worth a try, you can enable or disable them anytime in the setup menu (Audio/Audyssey)
      Which sub do you have?
       
    11. angliaboy

      angliaboy
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      DIY Dayton reference HO 18" in a 85L (ish) sealed cabinet

      I shall give the above a go and see what happens, I've listened to it briefly and it seems awesome so far with no eq.
       
    12. Derek S-H

      Derek S-H
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      Audyssey does set the Subwoofer level lower when calibrating.

      My Marantz SR7012 wants the output at 75 dB, which always means turning volume output down to accommodate this, but I immediately turn it back up again to a level that sounds right to me after calibration.

      My Sub doesn't have dials at the back, it has a digital readout at the front which I control using a remote. I'd say -7 dB sounds about right for calibration purposes, then I turn mine back up to 0 = +5 dB.

      I also don't engage any of the Dynamic sound modes because I want to run the Sub as clean as possible.
       
    13. Hamm12

      Hamm12
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      On audyessey where it asks me to set the gain so the read out is 75db. I ignore that, and the set the gain up so it reads around 80db.

      My avr trim currently is on -11db on one sub and -10.5 on the other. I then raise each sub by 4db on the gain. I always leave dynamic eq off, don't like how it sounds and beside I listen at higher levels so the benefits of dynamic eq are not much use to me.
       
    14. chrisgeary

      chrisgeary
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      I think how hot also depends a bit on frequency and whether you're using a house curve or not.

      In my room, relative to frequencies above 100hz, the sub is about 15db hot at 20hz, 10db hot at 50hz and 5db hot at 80hz. If hot is defined as louder than the upper frequencies. Perhaps this graph will help:

      rough response.jpg

      I've smoothed it to 1/3 octave to give a really rough representation. Its a rising house curve from 80hz downwards or so to compensate for the ear's lesser ability to respond to frequency the lower it goes. Although its +15db at 20hz (and 14hz), it sounds flattish to my ears, with perhaps an ever so slight increase in response as frequency lowers. If the entire range from 20-80hz was 15db hot, that would sound boomy and horrible.
       
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      Last edited: Nov 16, 2018
    15. Nick1881

      Nick1881
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      I increase my sub level by around 5dB, I do enjoy bass so I prefer it higher than the calibrated level.
       
    16. b1g1an

      b1g1an
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      What I don't think has been mentioned is what you're boosting, if the sub is just doing LFE than that'll just give more boom which is fine if you want that. But if, like most, the subs also helping out the other speakers too, ie set to small and cut off at 80 or higher etc, then you'll be completely unbalancing the system with a sudden huge increase as you hit the cut off.
       
    17. 494930

      494930
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      @angliaboy
      There's no right or wrong answer here, it's all about preference. I run my sub 2.5dB hot and 5dB isn't uncommon for some people.

      12dB sounds a lot though, are you adjusting the speaker level trim from -7 to +5 or (as I suspect) using a separate level trim level adjustment (such as the options button on Denon and Marantz AVRs) that starts at 0?

      I'd also be wary of ignoring Audysseys target of 75dB during calibration, your effectively reducing the available headroom for EQ. Best to set to 75dB as instructed and increase the gain after calibration if you wish.
       
    18. Delija

      Delija
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      @chrisgeary
      My optimal FR curve is very similar to yours. It's maybe just a little less "aggressive".

      [​IMG]
       
    19. angliaboy

      angliaboy
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      Yes, you are correct, sadly in my ignorance thinking 0db was standard not realising that whatever audyssey sets it to is going to be its default, thoguht that only the increase above 0db is the perceived increase in volume. I had used the CH Level button on my Denon Remote to adjust the Subwoofer seperately, mainly for music, I might add where I found that I wanted a bit more kick, but I was listening at -25 to -20db anyway, I just found I wanted more bass, not overall volume, which probably saved me from wrecking my sub. The -7db was just an estimate anyway, as it had been a few years since I had done an audyssey calibration, I happened to ask the question because I have recently built a new sub and was asking for advice before setting things up properly.

      Ill be honest and say Im not sure what you mean here as calibration for me entails plugging in a setup mic for Audyssey and running it with the mic in MLP and any other positions you wish to measure, although I have heard this 75db thing mentioned before, Im not quite sure what its relating too or where I would "set to 75db" as you say?
       
    20. richardsim7

      richardsim7
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      This is my house curve

      [​IMG]
       
    21. angliaboy

      angliaboy
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      what equipment do you have to get measurements like that, is it like an Arcam AVR or just minidsp etc?
       
    22. richardsim7

      richardsim7
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      Well the software is Dirac Live, included with my NAD AVR. But if you want measurements you can use a mic (such as a MiniDSP UMIK-1) and Room EQ Wizard
       
    23. 494930

      494930
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      So your only running your sub 5dB hot which is pretty normal with Audyssey.
      The very first measurement Audyssey takes is for the subwoofer volume. If it's too far away from 75dB then it will ask you to adjust the gain dial on the subwoofer and show you a live SPL reading whilst you do this.
       
    24. angliaboy

      angliaboy
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      Pretty sure mines never done this? although it is a pretty old, Denon AVR 1912
       
    25. 494930

      494930
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      Could be that it's a feature that was added to newer models or just the XT32 version of Audyssey.
       
    26. angliaboy

      angliaboy
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      Maybe, I think its due an update though, but its not wireless so its a pain trying to get an internet connection to it.

      Its my next item on the list to upgrade though
       
    27. SeeNoWeevil

      SeeNoWeevil
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      What is your 'reference level' set to for Audyssey? It affects how much bass is boosted when using Dynamic EQ.
       
    28. angliaboy

      angliaboy
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      Is this found in the dynamic EQ menu?
       
    29. SeeNoWeevil

      SeeNoWeevil
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      Yeah, it should be around there. Might be called reference offset or similar.
       
    30. angliaboy

      angliaboy
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      shows as 0db
       

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