Looking for DIY Studio Speaker

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Nothing to say sorry about, I appreciate your help! :nod:

@hugo stiglitz : I have seen this site before but here in Germany there is no listening room them, right? I always found the ATC models to lack a little bit in bass response. May be adding a sub or dual sub can fix this?

If you really think ATC SCM100 lack in bass you should invest in some ear-training
 
Baffle edge diffraction generates distortion. Truncated pyramid cabinets similar to Avalon speakers can significantly reduce this edge distortion. attached examples

A 12" woofer like the SB34NRX75-6 designed for excellent transient response in a -F3=36Hz sealed 3.5-4cuft box volume can produce better sound quality than a ported alignment, but requires a larger box volume for the same -F3. DSP equalization is easier with a sealed woofer. A LinkwitzTransform filter can produce -F3=20Hz.

A 9" woofer like the Satori WO24P-8 can produce -F3=25Hz in a 3cuft ported box volume.
 

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Well reviewed horn tweeter + 8" mid + 12" ported woofer

Maximus-12 Very powerful 12" woofer for deep bass response down into the low 30hz range High end B&C woofer for great midrange response. Class leading DNA-450 compression driver extends response up to 20khz Easy to power 8 ohm speaker with 93db 2.83v/meter sensitivity. Quality name brand components. SEOS-10 waveguide gives you a larger 'sweet spot'. Will handle 700 watts and play over 120db. Designed to work best for 2 channel use and does not need a subwoofer.

Denovo Audio Maximus-12 Speaker Kit
 
diysoundgroup has many positive reviews for service. You will want to eMail them to discuss purchase options and get the price + Germany_shipping.

1) diysoundgroup sells CNC cut front baffles for the TM and the W, and a complete flat pack for the woofer cabinet.
--shipping cost to Germany will influence your decision
2) Discuss benefits of a 2*0.75" double-thick baffle with 1" quarter-round on the front baffle edges to reduce diffraction.
3) Discuss bi-amping using a plate amp with LR2 or LR4 crossover slopes. Will these fixed crossover slopes hurt the sound quality.
4) Discuss bi-amping with a MiniDSP type unit with flexible crossover slope and flexible room equalization.

* Is there a flat pack for this speaker? Answer: The flat pack used in the MBM-12 is what was used to design this speaker and works well. There is not a flat pack for the upper section, but it's small and easy to build. *
 
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