Help with Angular Spiral

[yan6]

I have run some tones on my Solo206' and found the following sitting at 8ft away:

at 20Hz I can hear it but it is quiet almost not there from 8ft away. Between 25 - 31.5 Hz is grows in volume until it levels off (with reference to the levels of other tracks) at 40Hz. I found what must be resonance points where the volume was significantly louder than the other tracks. They were at 80Hz, 125Hz, 200Hz, 1250Hz, 2500Hz & 3150Hz. And all was gone at 40kHz.

Unfortunately the angular spirals are at my dads house. I hope to get there this weekend to try the same and see. All were done by ear with the following http://binkster.net/extras.shtml#cd

Can anyone recommend to me some freeware to measure with. I am wondering if I can use the setup mic that came with my Dennon receiver.

Edit: One thing further I was just talking with my dad and he said they are making bass it just too low in volume with reference with the mids and highs

[yan6]

I ran the same test cd at my dad's on his angular spirals and found that they do dig a little lower than my solo's, but they seem to come alive at 31.5 and 40 Hz. So they are generating bass but the volume of the bass is just to low. When music is playing the bass seems to be overrun with the mids and highs. I'm wondering if a BSC would be the best way to help this out.

[woodturner-fran]

From your post, I would think that a BSC won't go far enough. I don't have much experience but a BSC might be able to alter the tone a bit, but I don't think it will do enough to get what you want.

MAybe someone else could comment here....


Fran

[human.bin]

i tricked a lot mine playing music from the computer (itunes) equalizing like the bsc should... indeed you can run into tonal balance but it really will depend on the recording, everything was also getting lifeless and lefeless, but this could be the computer)... and cancellation were always there, but probably that's my strange room...

i think i will give a bsc a try too. frequency should be around 500hz
let us know if you get it done. and let me also know how, since i'm new to this

[human.bin]

so, from what you wrote on the other thread you already built another piar of spiral??
so you are satysfied with them? did you consider the bg, 250? i made the sides 0.5cm smaller and they look pretty elegant 90cm tall floorstanders... btw i'm gonna trash them, i missed it for AN

[yan6]

no, no we built two sets at the same time, one for my father and one for my sister as a gift. We have only auditioned one set as we dont have the drivers yet for the second set. It was part of the order I placed on Saturday. There wont be any difference in sound as they were built the same.

We are not really happy with the sound they are missing a lot and I realized from what you said on my other post that a sub wont really solve the problem as there will still be a lot of mid bass missing . So I am still left looking for some solution. We will have to see where the BSC leaves us!

[cascadeguy]

Edit: One thing further I was just talking with my dad and he said they are making bass it just too low in volume with reference with the mids and highs

If that is the case then a inductor-resistor network in series with the speaker should suppress the high frequency relative to the low frequency. Start with an 1 mH inductor in parallel with a 4.7 ohm resistor. This ciruit is described in the Jordan driver systems website.

[cascadeguy]

I think it might be helpfull to refer to the Nelson Pass paper on Current amps and single drivers on the Passdiy.com website. Good Luck

[yan6]

Well, I received the parts and finally got around to trying these on my dad's speakers. I used a -10db BSC circuit as calculated by the spreadsheet off MJK's site (15ohm & 5.6 mH). I was concerned at first taking the circuit over to my dad's as I had hooked it up to my Solo206' and didnt get too much results. I do know that these circuits are not designed to work on BLH's but I though it would do something. Anyways the circuit worked really well. -10db seemed perfect it brought the bass, mids and treble all inline very nicely. It didnt appear to loose any dynamics or liveliness on the top end. The speakers are in a large open basement and we were about 10ft away from them and it sounded very nice. My sisters speakers are almost done with the polyurethane and will be here at my house. I am curious to play with this circuit a little more in a room and with music I am familiar with. I will be able to give a good comparison after that to my solo206'

Cheers,

Ryan

[human.bin]

great to know! i hooked up on a new big work so all my speaker desires must wait, but i'll give it a try... since many people suggested the spiral horn to be nothing more thena reflex without the need for BSC. we should now point out ex-novo the advantages of the design: a comparison with the solo being prbably the best way to do it, please do an extensive comparison