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  • BillD8 commented on buildingupbob's instructable Making A Plywood Upright Bass9 months ago
    Making A Plywood Upright Bass

    lovely.~i wish i could see the drawings though!is it able to tolerate metal strings?can it handle being slapped"?if so, is the neck re-enforced? (it wasn't clear in the list there)

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  • BillD8 commented on Huntfish's instructable Sub Woofer Box 9 months ago
    Sub Woofer Box

    would do most folk, but it is not ideal.generally sub bass speakers need to have an opening and special cut dimensions inside to make those lower frequencies come to life.

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  • BillD8 commented on Marsh's instructable Build an Inexpensive Sub-woofer9 months ago
    Build an Inexpensive Sub-woofer

    usually in sub-woofer cabinet design i would expect a "folder-horn" inside.this in effect means, for example, recreating the dimensional theory behind a tuba! which in the case of a tuba means the "horn" begins as a small piece where the vibration to be amplified begins, and a horn coming from the mouthpiece which builds deeper and deeper frequencies till it gets to the wide end peice where you here most of the sound from.in the case of a folder horn bass speaker, we have the speaker itself (like the vibrating mouthpiece on a tuba) generally facing the front and on the front of the cabinet, but NOT always (back loaded).directly behind the speaker cone (in a front loaded bass speaker) you'd have a hole cut that acts as the beginning of a wooden tunnel that folds it's...

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    usually in sub-woofer cabinet design i would expect a "folder-horn" inside.this in effect means, for example, recreating the dimensional theory behind a tuba! which in the case of a tuba means the "horn" begins as a small piece where the vibration to be amplified begins, and a horn coming from the mouthpiece which builds deeper and deeper frequencies till it gets to the wide end peice where you here most of the sound from.in the case of a folder horn bass speaker, we have the speaker itself (like the vibrating mouthpiece on a tuba) generally facing the front and on the front of the cabinet, but NOT always (back loaded).directly behind the speaker cone (in a front loaded bass speaker) you'd have a hole cut that acts as the beginning of a wooden tunnel that folds it's way round in a spiral, and generally exits in a wide hole (the width of the cabinet) generally, but not always, below the speaker cone.the effect here is that it offers the ideal bandwidth of waves needed for genuine sub-bass in wooden cabinet design.also, generally, we would expect baltic plywood (no "voids" in the ply layers!)and the glue used to make the ply to be heat/boil/steam/water resitant.thye speaker above from it's appearnace and dimensions looks ideally more suited to perhaps a bass guitar speaker unit?here is a very expensive exampl: https://www.instructables.com/files/deriv/FJS/72NG/...and here is a more typical DIY sub bass speaker (back loaded in this case, meaning the speaker driver is mounted inside and in the "back" of the cabinet) example:http://es.virtualdj.com/image/62537/48114/folded%20horn%20sub.gif

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