Another FR125S design. Finally Completed!

[Vikash]

This one has been in the making for ages now (11 months I've just noticed), but I'm finally calling it finished, including the writeup.

It's a simple 9l ported enclosure with two notch filters. Measurements and design with lots of pics on the website:

http://www.vikash.info/audio/FR125S/index.asp

And a milestone has been reached for me, as it's the first time I've taken a design from start to finish including cabinet and filter design and measurements all by myself. Pat on the back please.

V

[Cal Weldon]

Pat pat.

[Godzilla]

Hi Vikash! Great looking website you put together. Just lovely!

I need to clean mine up since it's gotten rather out of hand.

Peace,
Godzilla

www.zillaspeak.com

[Vikash]

Thanks fellas.

[one1speed]

Looks great!! I'm curious about something. Are the small humps in frequency response really worth all of the circuitry? I'll be curious to hear your thoughts if you try them with and without.

Beautiful finish job and nice site! Also, the Orions looks great, one beast of a project, I'd guess. Appears as though they're coming along nicely.

[andrewmc]

Beautiful work.

Did you manage to get that flat frequency response without baffle step compensation?

[Vikash]

Originally posted by one1speed
Looks great!! I'm curious about something. Are the small humps in frequency response really worth all of the circuitry? I'll be curious to hear your thoughts if you try them with and without.

Now that is a good question! I think with a bit more tweaking the upper notch could be more effective. The notches are defintely needed IMO, but even then the upper response is still a little sharp - probably exagerated by the sequence of peak-dip-peak inherent in the natural fr. However the end result is still +/- 3db from 20-20k.

The Orions are coming on well. I'm currently auditioning amps for the required 8 channels. Some finished pics ( before the great hard drive crash of '06 ) : http://www.diyaudio.com/forums/showt...13#post1002813

Originally posted by andrewmc
Beautiful work.

Did you manage to get that flat frequency response without baffle step compensation?

Yes. I measure the low end response nearfield, summed port and driver response and adjusted for baffle step in software. The result is the FR shown. Bass is very nice. Sounds excellent in my smaller room, but a touch boomy in my long living room.

[Ray Collins]

Congrats Vikash!!! The first of many I am sure.

[loninappleton]

Originally posted by Cal Weldon
Pat pat.

Very nice work and well documented.

I didn't know if Paints4You was a product or a paint
shop but the spray work turned just like a Yamaha
piano.

:-)

[DanWiggins]

Originally posted by Vikash
Yes. I measure the low end response nearfield, summed port and driver response and adjusted for baffle step in software. The result is the FR shown. Bass is very nice. Sounds excellent in my smaller room, but a touch boomy in my long living room.

Now how many times do you hear about a 4" full range driver having too much bass output, becoming boomy in a big room...

Congrats on the design, looks really good! I'll have to try that filter out via emulation, see how it sounds...

Dan Wiggins
Adire Audio®