[sagamotto]

Hello everyone,,,

I have alway wonder how the sound of dipole is until i tried building one myself. A small and simple yet budget enough if i ever screw up something not having to regret it after. So in prossesion, i have the following drivers:

HiVi TN25 (HF)
HiVi B4N (open MR)
Peerless 830685 (6.5" mid bass)

Front baffle is measured at 12" x 24" stand 36" in height...





The bass driver is fitted in a aperiodic TL enclusure tune to about 45hz
and here is the draft x-over layout....



Can anyone here help me verify or improve it further ?

From what i am hearing now is quite good and can withstand at very high volume.

Thks guys....
Sagamotto.

[Russell Dawkins]

Looks good, Sagamotto, and welcome to AudioCircle.

One thing I would look at is what looks like a sharp ridge around the tweeter "horn" flare. That is a hot spot for diffraction and might be audible.
Good basic design, though. Are those reflex ports for the Peerless mid bass?

[sagamotto]

Hi Russell.

The Peerless mid bass is fitted in an aperiodic TL cab tune to about 45hz. There are lots of fibre stuffing inside... I made  the flair with a liitle bit of "ridge" on the surround for a reason cause i plan to put a very thin weather strip foam in it... I think by doing this can help smooth the sharp response of the Tn25.

BTW, thks for the comment
Sagamotto.

[sagamotto]

Hi guys,
Today I did a little adjustment for the tweeter's cap, i lower it to 3.5uf. Overall sound a lots less fatige and allow longer listtening session throughout all types of music program. My rederence cd consist of "immortal Beloved soundtrack"  and " State and Main Soundtrack", Yamaha Ca410 and Yamaha Ca510 integrated amp with Diy Cat6 cable.

All in All, music reproduction is very satisfying. It is what it is, a low budget Ob design.Very straight forward with simple filter network (very few parts). I would strongly recommend anyone want to be convince what open baffle system would sound like compare to traditional enclusure type system. Sensitvity estimate at about 86db  at 8ohms. I haven't done any specific FR measurement, everything done with simple logic calculation and adjust according to hearing satisfaction. The HiVi B4n is indeed a very good mid range driver, although can also be use as a full range as well depend what ur taste of music is... My Sakamotto budget ob design as present can be very good mated with any home theatre system application. The low end extention (in room estimated) run alot lower (feel like 30-35 hz). Mid range is precise. Top HF give an easy air feel, sweet spot is indeed very wide and can be heard loud enough to bother the guys next door...

Feel free to make a comment for the "Sakamotto Budget OB"
I am open to any further crossover adjustment if neccessary.
once again, thanks for viewing my little project...

Hiro Sagamotto...