Hi all,

Recently I got bitten by the horn bug and I wanted to make one. It is WAY harder than I thought but ultimately quite rewarding.

Trying to find an easy to construct design I landed upon the Bill Waslo SynergyCalc spread sheet which is super easy to use! (attached with my current settings) I thought a microspeaker would be cheap and fun to play with so I ordered two Peerless PMT-20N12AL04-04 drivers.

Here are my attempts so far and my observations on the failings (thanks to input from others):

- Made of 0.5mm card and masking tape

- A 1" throat to fit the diameter of the driver

Raw response - Horizontal 0-15-30 degrees at about 70cm:

EQ'd Flat response - Horizontal 0-15-30 degrees at about 70cm:

- It's made of flippin' thin card

- Throat is too big for the surface area of the driver

- Response bunches up from 5k onwards

Recently I got bitten by the horn bug and I wanted to make one. It is WAY harder than I thought but ultimately quite rewarding.

Trying to find an easy to construct design I landed upon the Bill Waslo SynergyCalc spread sheet which is super easy to use! (attached with my current settings) I thought a microspeaker would be cheap and fun to play with so I ordered two Peerless PMT-20N12AL04-04 drivers.

Here are my attempts so far and my observations on the failings (thanks to input from others):

__MK1 Spec__- Made of 0.5mm card and masking tape

- A 1" throat to fit the diameter of the driver

Raw response - Horizontal 0-15-30 degrees at about 70cm:

EQ'd Flat response - Horizontal 0-15-30 degrees at about 70cm:

__Observations on failings__- It's made of flippin' thin card

- Throat is too big for the surface area of the driver

- Response bunches up from 5k onwards

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