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Thread: Getting the amp off the floor....

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    Pro Audio Group sshack has disabled reputation sshack's Avatar
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    Default Getting the amp off the floor....

    Is this done to avoid reflections (from/off the floor) or to minimize vibrations, say up through the mic stand and into the mic? Or both?

    Additionally, is there really a preference as to how high? If for the reflection issue, couldn't you just tilt it back?

    Lastly, should a stand that permits the least amount of resonance be chosen...if for vibration?

    I ask because I want to know.

    Thanks.

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    Kev
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    yes there are reflections and yes a tilt back can help

    yes there are vibrations and a mechanical DE-coupling from the floor may help

    getting a speaker higher might just be about getting it closer to you

    but generally when a speaker is lifted from the floor ... OR moved further away from a wall (boundary)
    it is to acousticaly De-couple the speaker from the boundry

    when a speaker is coupled to one or more boudaries there will be an enhancment of the lower frequencies

    the distance required is relative to wavelenght
    the lowered the frequency the longer the distance

    this could get complicated
    so
    it might be better to have a google surf and chase a few of the key words seen above

    these principles are seen in
    Soffit Mounted Speakers
    Horn Loaded Speakers
    PZM microphones
    Kev
    DIY Factory

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    Pro Audio Group Cucco is on a distinguished road Cucco's Avatar
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    To add to Kev's insightful post -

    It's not uncommon to place a large, inert, dense trapping material below said amp to help minimize the LF reinforcement.

    For example, getting the amp off the floor by 2' then placing a 4" sheet of Owens Corning 705 below it.

    This done in an already acoustically-enhanced environment will really let the amp shine through.

    That being said, you may just prefer the sound of the amp with that boundry boost. Otherwise, it may sound too thin.

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    Pro Audio Group moonbaby is on a distinguished road
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    I've had my amp-a McIntosh MC2100- on the floor for many years. I tried placing it on a stand about 2 feet off the ground, but I could never hear a difference. Maybe I'll try it again...

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    Pro Audio Group Cucco is on a distinguished road Cucco's Avatar
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    Mooney....
    McIntoshes are computers silly. You're thinking of Mackie Amplifiers. mNow THOSE are nice amps... :-O
    (jk)

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    Pro Audio Group AwedOne is on a distinguished road AwedOne's Avatar
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    I've had my amp-a McIntosh MC2100- on the floor for many years. I tried placing it on a stand about 2 feet off the ground, but I could never hear a difference. Maybe I'll try it again...
    I'd be really worried if your $12,000 amp sounded different when on the floor. :mrgreen:
    Bill Knipe
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    Cubase 4.5 on PC, Tascam M-3500, FW-1082, Motu 2408MKII (X3),Pearl drum kit, Line 6 Pod 2.0, Roland Blues Cube, Dynaudio bm5a, AT 3035,3032,4040(s), Kel HM-1(s), 2 basses, 6 guitars, a m

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    It was a mere $500 when I bought it, and I just looked at a used McIntosh site and they have one at $875.00 (as of 1/30/08). Maybe it's got a bad hard drive...

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    Pro Audio Group sshack has disabled reputation sshack's Avatar
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    Good medicine guys, thank you.

    I'll certainly expand my research as well as record some clips using a variation of the techniques thrown out here to get some first hand ideas of what will happen. It was on the agenda anyway, I just thought it would be better to have an educated approach first before just lifting these heavy buggers up.

    /Shack

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    Great Site, I'll post more! 7string has disabled reputation
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    Are casters considered to be adequate for decoupling from the floor?

    Also, I was raised to always put the tube amp heads on the floor instead of on the cabinets to help prevent microphonic tubes.

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    Amp off of head .....yes

    Casters decouple.....maybe. Depends on the floor material and the casters and their mechanical nature. Fenders.....no. Bottom tray of a high-end road case....yes.
    da moderAtor....proprietor of drool'n dogg rekords...pope-of-recording, the spitboys church of freedom...everything in moderation including moderation

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