Home dbx User Forum dbx Archive Threads DriveRack PX

Adding low end welly to a live kick drum.

stakkastakka Posts: 5
edited January 2010 in DriveRack PX
Hi, first post, hope to do it justice.

We have only just picked up the Driverack PX having given up on the reliability (or lack of) of a Behringer DEQ2496 (nice features but steer clear in a live situation IMO). I look forward to giving our feedback on the PX and eventually provide some helpful advice in return.

I am still reading (at a million miles an hour) all of the very comprehensive and helpful info here and feel fairly confident on setting up the usual (Gain structure, EQ, AFS etc etc) ... and I stress I will get round to reading, absorbing and trying out all the advice / topics covered here - but without the luxury of much time and gigs looming we need to jump in and hit the road running somewhere.

I am interested if anyone has any preffered techniques or pointers on getting the best from the very low end of a kick drum. We are a fairly simple set up and want to keep it that way (in the interests of setup and reliability) currently using the Behringer Xenyx 1832FX mixer feeding through the Driverack PX out to a single dB technologies Sub05 Sub and 2 x Mackie SRM 450 V2 for the tops. Only 2 vocal mics and the kick drum mic (Red Audio) are fed in to the system for Indie / Rock style music.

We are not after that 80Hz thump in the chest bass, it is the lower 30 - 60 Hz range we like to enhance to give more of a subtle but deeper and still "felt" sound. Previously we used the parametric on the DEQ to get somewhere (but not quite) where we wanted but with the Sub Synth facility on the driverack I am wondering whether this is worth dabbling with as well.

I am sure it is obviously down to trial and error and what we find sounds best - however we only have one practitice session before the next gig so time is limited when I can get my hands on the gear and it would be very handy to go forearmed with a bit of helpful advice to try out so that I can spend the little time we have practicing playing.

Also would I go too far wrong if I used the SUB12 preset in the PX menu for our Sub 05 unit? They are very similar units, just with the sub 05 being a 15" cone and a slightly lower bottom end frequency.

Thanks in anticipation.

PS - I am the drummer and sole sound engineer (term used loosely) hence please excuse if I am asking something that appears basic to those used to tweaking sounds.

Comments

  • Dr. JDr. J Posts: 209
    Wow -- a good kick drum is going to come from one of two situations. #1. Hiring a sound guy who has optimized his system to the fullest and delivers the type of thump or subtleness you describe. OR #2. Spend the next year and half diligently reading about how to do that. Here is a method that will get you there. Read everything Gadget talked about in the FAQ section. You FLAT OUT have to have a system that has been "Neutralized" as your starting position. All frequencies reigned in @ equal energy so there is NO HYPE or Lack of. This is called a "Flat Frequency Response" which if done well is a system that doesn't really have a response BUT it doesn't happen that often if ever in the wild. You just need to get it the best that you can with your Driverack. The procedure is in the FAQ section. Once you have accomplished that -- you should be able to use your channel EQ on your mixer to get the desired subtleness you are looking for. Skip the Auto EQ in the venue -- it won't help you. Well -- gotta go for now. There are tons of other things you need to consider. Just read as much as you can if you really want to do this. Gadget, Dra or Dennis will be along shortly. I haven't been on here much lately. How you all been?
  • GadgetGadget Posts: 4,915
    Ok, so you have a single powered 15" sub with 400 watts... that has a 100 hz LPF, and a max spl of 129 db spl. Right? I HATE products that don't give you the information.... like a frequency plot and an online manual that I can view... no pictures of the amp section and the "data sheet" is conveniently "unavailable". So your gonna have to help out here... is there a defeat switch for the Lopass? is there a limiter indicator?...jeez...

    That's not a lot of power to reproduce 30-60hz...those frequencies are the MOST power hungry ones..and adding the sub synth might very well cause damage...

    The thing is...there are MANY things about the kick drum... is it damped... is there a hole in the front, is it tuned to the lowest point it can and still sound good...what type head, what type shell, what size

    All this and what mic/mics, what location of the mic/mics, drum head condition, playing technique... and as you said what tone are you looking for?

    As I recall the primary frequency of the kick is about 300-350hz, and the first lower harmonic is around 80hz...the lower (and upper) harmonics are also lower in VOLUME (sound pressure). You have 2 parametric bands in the lo outs of the PX set one up @ about 80 hz and start with a Q of about 1.0 (pretty broad) and a cut of about 3db this should help tame the 80hz peak. (we'll fine tune this later) this should help cut out the 80hz peak...next set up another peq @ about 45hz, set a Q of about 1.5 and start with a 3db boost. this should help get the lower frequencies coming out, again fine tune these later...

    On the channel EQ strip the kick is on...set the mid sweep @ about 200hz and cut it fully....move the center frequency back and forth till you get the majority of the fundamental frequency cut out of the kick sound, then us the gain control to set how MUCH of this cut you want, now do the same for the peq's on the low outs of the PX...if you do decide to use the sub harm. start with a VERY little bit... cut the 24-35hz completely and start @ 50% on the 36-56 hz and start very low gain and move upward...I personally DO NOT LIKE IT!

    Add batter head click with 2500-3Khz boost as desired...

    Depending on your answers to the sub questions will determine the xover frequency...

    Gadget
  • GadgetGadget Posts: 4,915
    Yo J!
    I haven't been on here much lately. How you all been?

    Glad the holidays are over! BAH HUMBUG! :roll: just a damn commercial ploy to get us to spend lots of money... :evil: Also gives the cops a reason to ramp up the idiocy...Been below zero for a high here for the last few weeks...SUCKS! Geez I sound like a real curmudgeon don't I? At least the snow came so we can snowmobile and ski (if it ever warms up!) Should get some relief starting this W/E I guess...We'll see...and you?

    A level 3 sex offender moved in a block and half away and I have 2 teenage girls :twisted: he WILL be afraid...VERY afraid of me... I guarantee you that, or leave here feet firsttietumao019.gif!

    Other than that just waitin for 2012...AddEmoticons04279.gif
    G
  • stakkastakka Posts: 5
    Many thanks Dr. J and Gadget - just the start I had hoped for.

    Alas no soundman Dr. J, until we hit the bigtime :lol: the 4 band members are the singers, musicians, roadies, sound and light techs, catering, promotion...etc etc... so looks like your option #2 is the only way for now - and hopefully we will get there a little sooner with the help from you guys and the resources here. Yep - already saw the info on starting off with the right foundation (which we will endeavour to perfect) and the issue with auto EQ indoors (interesting!). The mixer eq is a little basic, usually enough to sort the vocals out but I had originally looked to have the driverack (previously the DEQ) provide the low end control, unless you advise otherwise. As we normally only have vocals and bass drum through the PA with the vocal through the tops then the sub itself is purely for the kick drum.

    We are usually only smaller venues - pubs and small halls for approx 50 people so the bass / guitars are through stage amps. If we start getting larger venues then we can always invest in more / bigger subs etc. but in our initial tests the single sub looked to have more than enough guts to get the kick drum across the typical rooms we play in and a moderate setting was enough to be heard / felt at the back, so hopefully the power will be there to work the power hungry frequencies we want effectively - but I understand what Gadget is saying on that front. In short though we are only really just in to the territory where we need to re-inforce the kick drum and sometimes we may not need to reinforce it as such but it would be good to be able to enhance the sound even if we do not need any extra volume.

    To answer gadget more specifically I have inserted notes in to his post below ... hope this helps.

    Ok, so you have a single powered 15" sub with 400 watts... that has a 100 hz LPF, and a max spl of 129 db spl. Right? I HATE products that don't give you the information.... like a frequency plot and an online manual that I can view... no pictures of the amp section and the "data sheet" is conveniently "unavailable". So your gonna have to help out here... is there a defeat switch for the Lopass? is there a limiter indicator?...jeez...

    Yep - DbT's website ain't that helpful. Brief 05 details on here http://www.dbtechnologies.com/images/pr ... OOFER2.pdf There is a limiter indicator led but do not recall seeing a defeat switch (will be able to check soon though). As for frequency plot I will see if the local dealer can provide - but don't hold your breath !!

    That's not a lot of power to reproduce 30-60hz...those frequencies are the MOST power hungry ones..and adding the sub synth might very well cause damage...

    Understood - but we do not usually need much volume - and the sub is dedicated to the kick drum, I'm happy to experiment with care if you think the synth is worth adding in to the picture.

    The thing is...there are MANY things about the kick drum... is it damped... is there a hole in the front, is it tuned to the lowest point it can and still sound good...what type head, what type shell, what size

    It is a New Mapex Orion 22 x 18 with original Remo weatherking Powerstroke heads (so hopefully we are not trying to polish a turd here!) - 6" port on front. Still experimenting with internal dampening (also considering the new "kickport" bass drum enhancer port but awaiting feedback in the meantime before purchasing). But a decent drum that sounds good when nice and loose.


    All this and what mic/mics, what location of the mic/mics, drum head condition, playing technique... and as you said what tone are you looking for?

    Single Red 5 Audio RVD1 kick drum mic - a low cost but well favoured value mic over here if on a budget. No real instilled science in placement yet - still playing with approx 1" away to just in to port, either face on or slightly angled. Every thing is a few months old and top condition. Standard Indie Rock music - no subtle playing tecnique - just steady 4 beat. Sorry to inflict Oasis on to you but this sound http://www.youtube.com/watch?v=4fLR3FRaFsQ is somewhere close. There is a bit of a click to it which I am not specifically after but (on my sound system here anyway) the feel "sounds like" there is a bit more below that just the normal 80 Hz thump you get - we want it heard / felt on a more lower subtle level but not to the too synthesised Rave / Sub Bass extreme nor have it too in your chest (80 Hz ish)

    As I recall the primary frequency of the kick is about 300-350hz, and the first lower harmonic is around 80hz...the lower (and upper) harmonics are also lower in VOLUME (sound pressure). You have 2 parametric bands in the lo outs of the PX set one up @ about 80 hz and start with a Q of about 1.0 (pretty broad) and a cut of about 3db this should help tame the 80hz peak. (we'll fine tune this later) this should help cut out the 80hz peak...next set up another peq @ about 45hz, set a Q of about 1.5 and start with a 3db boost. this should help get the lower frequencies coming out, again fine tune these later...

    On the channel EQ strip the kick is on...set the mid sweep @ about 200hz and cut it fully....move the center frequency back and forth till you get the majority of the fundamental frequency cut out of the kick sound, then us the gain control to set how MUCH of this cut you want, now do the same for the peq's on the low outs of the PX...if you do decide to use the sub harm. start with a VERY little bit... cut the 24-35hz completely and start @ 50% on the 36-56 hz and start very low gain and move upward...
    Perfect - I look forward to giving this a go.

    I personally DO NOT LIKE IT! Hopefully we are on the same level - I want a quality, heard low thump but it needs to sound somewhat authentic / acoustic as opposed to over produced / rave festival like... if that makes sense :?

    Add batter head click with 2500-3Khz boost as desired...

    Depending on your answers to the sub questions will determine the xover frequency...

    Gadget


    Again... thank you. :D
  • DraDra Posts: 3,777
    Gadget wrote:
    Yo J!
    A level 3 sax offender moved in a block and half away
    G

    You have a problem with reeded instraments? :mrgreen:

    DRA
  • GadgetGadget Posts: 4,915
    Realistically the sound on that Youtube vid is a standard well tuned system 80 hz (not hyped) sound with 3k click to taste ( allows for better definition of the kick so as to moderate the "muddy" sound I know I detest) there is moderate info bellow the 80 hz but it's a non hyped, natural falloff of the kick second harmonic... pretty much the way I make my kicks sound for classic rock. If do not inject too much low end into the kick you will have more power for the mains... likewise if you raise the HPF of the sub you will also find that the kicks sound tightens up more... so experiment with this...you may find that an HPF of 40-45 hz BW18 will really clean up the kick and the low end rumble in the rooms...

    The nature of a bandpass box such as the 05 is that high frequencies are naturally attenuated, and no real intelligible sound should be heard from it. ( by that I mean NO vocal definition should be heard even if it was in the subs... but vocals in the sub isn't good anyway...engage the LPF per channel on the vocal channels and I generally drop the low shelf ( low frequency channel control) on each vocal so that there isn't a lot of low end vocals to muddie the mix). If you allow the kick to be ONLY in the sub ( and I get that you only want kick , no guitar or bass in the sub) but you need some of the other kick frequencies in the PA or it will sound muddy and nasally...

    I understand that the bass guitar is able to carry the room, that is because bass is omnidirectional in nature, but the guitars are very directional, and so if you don't add a bit of them into the mix and they are say stage left and right, the people on stage left are deprived of the guitar on stage right, (and vise versa) AND the sound of the guitars will be naturally heard in the vocal mics anyway (they pick up anything in their proximity), and the difference in arrival times at the ears of the listeners will cause a noticeable timelag which will make the guitars sound strange.. as little as .7 ms is noticeable and that is a distance of around 5-6 feet!

    Set the frequency selector on the sub to 120 hz and use the Driverack to set the crossover point for the system... I would suggest 100hz LR24 for the transition...this will help keep the vocals and low mids more intelligible and keep the nasally sound out of the subs...it's a good starting point, then you can try raising and lowering that point and see where you end up.

    The key here is to get the system flat in frequency response, this will do more to help your sound than anything. your going to find when you do that things will jump out more in the mix...

    Gadget
  • GadgetGadget Posts: 4,915
    You have a problem with reeded instraments? :mrgreen:

    Ah... got me again didn't you... that's what I get for not proofreading my posts.. and posting when I'm beat...and no I don't have and problem with reed "Instrument"....0004.gif

    perhaps your "spelling checker" is on the fritz?
    emot66.gif
  • DennisDennis Posts: 801
    Gadget wrote:
    as little as .7 ms is noticeable and that is a distance of around 5-6 feet!Gadget

    That sounds to me like a distance of less than 1 foot...perhaps 7 ms would be a distance of 5-6 feet.

    Dennis
  • stakkastakka Posts: 5
    Thanks a million Gadget. I shall try all that out (whilst continuing to take in all the other information on the forum).

    Have a great day !

    BTW - For a moment I actually thought the Sax Offender was intentional and a somewhat funny joke about a Kenny G wannabe moving in and leaving his windows open during practice sessions. :D
  • DraDra Posts: 3,777
    Gadget wrote:
    You have a problem with reeded instraments? :mrgreen:

    Ah... got me again didn't you... that's what I get for not proofreading my posts.. and posting when I'm beat...and no I don't have and problem with reed "Instrument"....0004.gif

    perhaps your "spelling checker" is on the fritz?
    emot66.gif

    Much like theater and theatre... I was using the "European" old english.

    DRA (Hoping the Tide rolls)
  • GadgetGadget Posts: 4,915
    Sorry dude... ain't gonna fly...

    Google search:
    Did you mean: instrument :mrgreen:

    remember... YOU opened this can of worms..

    Dennis... absolutely...8ms/foot...I even posted that in the FAQ section...
    hey did you get my return PM?
    G
Sign In or Register to comment.