Open-Baffle and Equalizer - why not :)

[gainphile]

You guys are amazing ... I'm now trying to digest all the info and do some read-up.

What's a common DIY active crossover ? Perhaps something compatible with gainclones

[Brett]

Originally posted by gainphile
What's a common DIY active crossover ? Perhaps something compatible with gainclones

Opamp based design around the sand of your choice. Couple of projects on Elliots site.

[DAMIC]

Hi Rudolf, thanks for response. My room is 4m x 6m, average height 3m, but unfortunately due to side doors I can placed front baffle max at 65 cm from the wall. This is exactly the place where, for years, I am keeping my Apogee Centaurus Minor’s, also dipole speakers. Recommended distance for almost all Apogees is between 90 and 120cm, but even 65cm gives me excellent performance.

Recently, I made 2-way reflex box with 12 inch Eminence ME12-2008 driver what seems to be older version of later Eminence Delta 12 and Eminence Delta-12A. The tweeter is German ribbon Gradient GRT 195. Box, net volume 109 liter, tuned to 47Hz, with F3 about 45Hz. The sound is surprisingly good and with flat tone controls there is enough bass in the room. I must point that only one box is made.

Last 2 weeks I found myself more to listen the Eminence than my regular setup. There is something catchy in that efficient paper cone speaker.

Now, reading all that posts about OB, I wish to try this design with same components. I know that OB will further decrease the bass, but also noticed that variations with wings, U or H frame gave better low response. In fact, I would be satisfied if I could provide the amount of bass from two speakers OB like I have with present one reflex box.

Rudolf, thanks for the graphs, again. Anyway, I am going to try U frame.

Regards,

[SamL]

Originally posted by ttan98
mine is housed in U frame the freq response improves dramatically, flat to 50 Hz. beware of resonance it generates. I use an elecronic x-over hence equalization is easy for me. I don't need it for mine.

Sorry to drag this out.

Hi ttan98,

What size woofer are you using in the U-frame? What is the high pass crossover point? Well, reading John K note, he mention 150Hz for U-frame, which is a bit low for the list of mid I have in mind.


Thanks

[ttan98]

Originally posted by SamL


Sorry to drag this out.

Hi ttan98,

What size woofer are you using in the U-frame? What is the high pass crossover point? Well, reading John K note, he mention 150Hz for U-frame, which is a bit low for the list of mid I have in mind.


Thanks

I am using dual 12in woofer and cross around 150 - 200Hz, I use my ear to tune it.