Buy some cheap car woofers (the cheapest! I can get a dirty 10" woofer for $15! in my country) and stick few of them in box. Let them play the low extension.
A6 doesn't do it for me when it comes to colour voice. Your current woofers right under it may just do the trick of full bodied voices and if you get the closed box cheap woofers(2 or 4 cheap per side) to help with the low extension i believe you wil be happy with it.
A6 doesn't do it for me when it comes to colour voice. Your current woofers right under it may just do the trick of full bodied voices and if you get the closed box cheap woofers(2 or 4 cheap per side) to help with the low extension i believe you wil be happy with it.
I putted some caps today...60uF on alpha 6" and 2uF on selenium tweet. O.M.G what A change.Bass is now louder ,clearer ,deeper...i am confused 
.Mids ,without humping on lower octaves ,clearer ,but just a litlle less wider.Higs also better...
I am quite happy with sound now and i hope that i will be even more when i put alpha 15" tomorrow.If i knew that this would bring such change ,i would not have order alphas 2 days ago.But ,what tha hell 🙂 .I hope sound will get even better with them.Research continues
Btw. Zen ,sorry 4 beeing so boring with so many newb questions !
.Mids ,without humping on lower octaves ,clearer ,but just a litlle less wider.Higs also better...I am quite happy with sound now and i hope that i will be even more when i put alpha 15" tomorrow.If i knew that this would bring such change ,i would not have order alphas 2 days ago.But ,what tha hell 🙂 .I hope sound will get even better with them.Research continues
Btw. Zen ,sorry 4 beeing so boring with so many newb questions !
Hi,
Please let us know how it turns out. Are you still using the same amplifier? You may try a powerful SS amp, just to get a feeling. Then you may try to biamp. If you aren't comfortable with active crossovers, try using a semi-active approach. (two amplifiers but passive crossovers) Use a capacitor to roll of highs an the mid/tweeter amp, and just put a coil in series with the bass speaker and SS amp. Even though this may not be as good as full active one, it has some benefits. It provides more power for the bass speaker, and provides a fine way for level matching between bass-mid/tweet. (no need for L-pads).
Regards,
Vix
Please let us know how it turns out. Are you still using the same amplifier? You may try a powerful SS amp, just to get a feeling. Then you may try to biamp. If you aren't comfortable with active crossovers, try using a semi-active approach. (two amplifiers but passive crossovers) Use a capacitor to roll of highs an the mid/tweeter amp, and just put a coil in series with the bass speaker and SS amp. Even though this may not be as good as full active one, it has some benefits. It provides more power for the bass speaker, and provides a fine way for level matching between bass-mid/tweet. (no need for L-pads).
Regards,
Vix
Vix said:
please - don't frighten him too much ........
seems that alpha 6 is much better blending with Alpha 15 (and Beta , too - depending of room and positioning) , than your B200 .
even if SPL data is somewhat similar for Alpha 6 and B200 ...... I still can't figure where is difference ......
Vix: I don't think you can solve wave cancelation problem by biamping. I pushed my OB to the rear wall to get some bass. It will work in corners too, even better.
chakija said:............Research continues
.................
that's main goal ........havin' fun
just relax and learn how to enjoy in quest .......
Zen Mod said:
Me neither. Maybe Alpha 6 and Beta 15 have more similar "sonic signature" so they blend easier with each other, or...who knows...
By the way, research continues (wife's comment: You're working on it AGAIN?!)
New setup, just tried last night:
1. Eminence Beta 15 actively crossed at 100 Hz, second order+ a 3.3 mH coil in series....
2. Viatons high-passed via PLL at 280 Hz (first order)
So far this sound better than previous attempts:
When I used higher xo point with betas (150 hz 1st order low pass), the sound was more spacious, but it was going too high for my taste and interfering with Visatons, muddying the lower midrange.
With very low Xo settings (Betas at around 60 Hz second order + a 3.3. mH coil) low end was fuller, but then midbass was anemic...
So I tried the middle path....
Vix
Re: F.Y.I.
Yep, just look for 15PW3-SLF if you don't like the aluminium dust cap. The paper(textile?) dust cap version wont have as good heat dissipation but probably less coloured sound.
Nice tread b.t.w.
/Jon [/QUOTE]
For the record…
Just got a pair of Seleniums 15PW3 – SLF, curious enough my pair has a black aluminum dust cap.
ion said:
Yep, just look for 15PW3-SLF if you don't like the aluminium dust cap. The paper(textile?) dust cap version wont have as good heat dissipation but probably less coloured sound.
Nice tread b.t.w.
/Jon [/QUOTE]
For the record…
Just got a pair of Seleniums 15PW3 – SLF, curious enough my pair has a black aluminum dust cap.
Yesterday i spent 8 hours trying to discover where is the problem with my sound...Alpha's r now instead of selenium 12" ,and something is obviously wrong.The kicks ,the shakes ,the deep's r gone !
.I really can tell what would cause such reaction.Maybe the old sensitivity problem of OB-s...Look at responce curves of each loudspeaker ; 12PW3 is almost 4 db louder than alpha 15" ,on 100Hz.
I can still hear that there is grease in bass when i stand near-behind baffle ,but somehow i can't get 20% of selenium-s bass in my sweetspot.I checked wireing like 53 times and it all seem's ok.I also try inversing phase in all variants ,but only got even worse results.Same thing with positioning baffle.
I am in deep sorrow...
.I really can tell what would cause such reaction.Maybe the old sensitivity problem of OB-s...Look at responce curves of each loudspeaker ; 12PW3 is almost 4 db louder than alpha 15" ,on 100Hz.I can still hear that there is grease in bass when i stand near-behind baffle ,but somehow i can't get 20% of selenium-s bass in my sweetspot.I checked wireing like 53 times and it all seem's ok.I also try inversing phase in all variants ,but only got even worse results.Same thing with positioning baffle.
I am in deep sorrow...
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Re: Re: F.Y.I.
Hey Tony.
Yeah, my mistake.
Mine have black aluminum dust caps, like yours.
Apparently the driver depends a bit on the metal dust cap to fill in the top end some.
apassgear said:
Hey Tony.
Yeah, my mistake.
Mine have black aluminum dust caps, like yours.Apparently the driver depends a bit on the metal dust cap to fill in the top end some.
Chakija: How about using both selenium and alpha 15? Btw i dont know about alpha 15 with its highish Q but it may require some time to break/burn in.
hakunin said:
hehe
we just ended phone conversation , I told him same thing 😉 - to use both - 15 and 12"
it's somehow clear what's happening - in one place in room he have just right amount of bass ; seems that some room nodes are in action;
curse of smallish rooms ...........
chakija said:Yesterday i spent 8 hours trying to discover where is the problem with my sound...Alpha's r now instead of selenium 12" ,and something is obviously wrong.The kicks ,the shakes ,the deep's r gone !
I can still hear that there is grease in bass when i stand near-behind baffle ,but somehow i can't get 20% of selenium-s bass in my sweetspot.I checked wireing like 53 times and it all seem's ok.I also try inversing phase in all variants ,but only got even worse results.Same thing with positioning baffle.
I am in deep sorrow...
Hi,
There's no easy way with just one amp and passive crossover. Differences in drivers sensitivities can destroy the sound "balance", and can drive you nuts trying to fix it.
You should get another SS amp (borrow one if you can, just to try it). Use it to power Alphas. The crossover will remain passive. If you have a separate preamp, this should be easy. Just use the Y splitters and connect both amp inputs to the preamp's output. Then, adjust the relative "volume" on one of the amps (Assuming that at least one of them has the volume pot).
Regards,
Vix
p.s. Try to move the speakers as further from the wall as possible
Keeping 12"selenium is not a solution because my brother need's it.Instead of trying 12''sel ,i moved whole rig into my parents bedroom 😀.It is ~27m^2.Again ,same thing happened.Bass lacks in sweet-spot ,but there is some of it in corners.Gain in mids and highs was great ,but tha bloddy bass is still missing 
!
I think that only solution now is to try to run in Alphas with SS amp wich i am going to borrow ,and see what happens.
!I think that only solution now is to try to run in Alphas with SS amp wich i am going to borrow ,and see what happens.
chakija said:Keeping 12"selenium is not a solution because my brother need's it.Instead of trying 12''sel ,i moved whole rig into my parents bedroom 😀.It is ~27m^2.Again ,same thing happened.Bass lacks in sweet-spot ,but there is some of it in corners.Gain in mids and highs was great ,but tha bloddy bass is still missing
I think that only solution now is to try to run in Alphas with SS amp wich i am going to borrow ,and see what happens.
did you tried that series resistor in line with 6" and tweet , we talked about?
chakij,
The Selenium in fact seems to be a remarkable unit for OB use almost 100 dB effecient at 100 Hz and 1 watt.
With the Alpha 15 you will be happy with the result if you take down the Alpha 6s about 4-5 db. Then you will have a very balanced response, I Think. I think your main confusion stems from this inbalance and the comparisons with the PW3.
These results are drawn from MJK's spredsheet. In fact you will in the end have a better balanced bass response from the Alpha15s than from the Seleniums and also in comparison with the Beta 15s. It's just harder to hear and to recognize. 😉
/Erling
The Selenium in fact seems to be a remarkable unit for OB use almost 100 dB effecient at 100 Hz and 1 watt.
With the Alpha 15 you will be happy with the result if you take down the Alpha 6s about 4-5 db. Then you will have a very balanced response, I Think. I think your main confusion stems from this inbalance and the comparisons with the PW3.
These results are drawn from MJK's spredsheet. In fact you will in the end have a better balanced bass response from the Alpha15s than from the Seleniums and also in comparison with the Beta 15s. It's just harder to hear and to recognize. 😉
/Erling
U were right!With 3E9 resistor in line with mid&high system sounds much balanced now.Maybe highs&mid r just a little more choked ,but overal results are lot better.However ,that nice shaking-low bass is everywere buy not in my sweetspot 😡 !
You will never get shaking-low bass from OBs. Just more dry and natural. And you can't compare with the Selenium, these are just remarkable. Your OBs should be quite flat down to 40 Hz with about 92 dB/1 watt efficiency.
/Erling
/Erling
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