ok, so as many of you might now, my current system is an Alpha 15a for bass and a fostex fe167e for everything else.
bass is according to the design that MJK designed. Thanks!
my problem is that i do not really like the fe167e handling everything.
I also want to add a second 15" to increase the sensitivity somewhat.
probably up to 96 instead of the 90 with the Alpha15a after the OB roll-of takes it away.
sooo... i am looking for a driver that will work with 2 Alpha15a in an OB that is "better" than the fe167e.
I do not mind adding a tweeter to it.
I guess i am looking for a driver that will handle 90% of the music. 400-?
thinking like beta 12lt or visaton b200 or supravox ($$$$$).
low THD, smooth response, great power handling.
thank you in advance for any help.
bass is according to the design that MJK designed. Thanks!
my problem is that i do not really like the fe167e handling everything.
I also want to add a second 15" to increase the sensitivity somewhat.
probably up to 96 instead of the 90 with the Alpha15a after the OB roll-of takes it away.
sooo... i am looking for a driver that will work with 2 Alpha15a in an OB that is "better" than the fe167e.
I do not mind adding a tweeter to it.
I guess i am looking for a driver that will handle 90% of the music. 400-?
thinking like beta 12lt or visaton b200 or supravox ($$$$$).
low THD, smooth response, great power handling.
thank you in advance for any help.
This could be a good candidate with a tweeter.
http://www.madisound.com/catalog/product_info.php?cPath=45_241_308&products_id=275
Here's a project with the 208esig http://www.blackdahlia.com/html/tip_43.html Dave
http://www.madisound.com/catalog/product_info.php?cPath=45_241_308&products_id=275
Here's a project with the 208esig http://www.blackdahlia.com/html/tip_43.html Dave
Hi Audiogeek. I am looking at PHL 6.5" and 10" for similar purpose. These are around 96dB for the smaller one and 100Db for the 10I. I will probably need a ribbon above this. Somebody in Tasmania, Australia, was advertising ribbons with I think 99dB sensitivity a few days ago but I can"t find the thread!!!
Some of the PHL can be hornloaded as well.
jamikl
Some of the PHL can be hornloaded as well.
jamikl
well how about the Radian 5208C or the Audax PR170M0 ?
the Radian is a co-axial which seems to have good reviews. the Audax is a 100db midrange but looks like it has some nasty break-up modes (dunno if audible).
Still OB, High eff, low THD etc is goal.
Thanks for your choices so far. PHL is kinda expensive.... but so is the Radian i guess.
the Radian is a co-axial which seems to have good reviews. the Audax is a 100db midrange but looks like it has some nasty break-up modes (dunno if audible).
Still OB, High eff, low THD etc is goal.
Thanks for your choices so far. PHL is kinda expensive.... but so is the Radian i guess.
Hi, i have a similar setup to you... Alpha 15's in H-Frames and a Fostex 165k in BIBs... playing with super tweeters to cap things off so i can move onto another project...
I have been thinking along the same lines as you looking for an efficient OB driver to match up with the Alpha 15's. The Eminence Lil Buddy looks interesting. I found out about it by searching threads.
http://www.guitarcenter.com/Eminenc...ar-Speaker-660063-i1153625.gc?source=4WWRWXGB
Looks just right for OB and certainly as efficient as you're going to get.
I have heard the Audax in OB and it sounds great but not sure it's much more efficient (if at all) than the Fostex driver you want to replace. Plus, it doesn't go as low and has a ragged top end. Too much crossover work for me i think.
My system is in a 'cobbled together' state right now but i do love the sound i get and can spend two hours at a time listening without fatigue. Amazing!
http://www.diyaudio.com/forums/attachment.php?s=&postid=1732647&stamp=1233604947
Yes, the Alpha 15's in H-Frames sound great! Perfect for a home system. There are probably many excellent ways to top them off but hi eff - wide range drivers seem to be the most satisfying for me after all these years of searching/listening/futzing.
I bet your Fostex 167e sounded great until you paired them with the Alpha 15's (love how you can simply stack them as an upgrade - so simple and doens't take any more floor space)... They really are great bass makers. MJK uses Lowther drivers. Perhaps that's the best way to go... but a bit expensive. I'd look to Eminence again. Even some of their newer 8" drivers look amazing, but not really for OB. Seems a touch of pro audio drivers properly tamed could provide amazing sound in the home.
Godzilla
I have been thinking along the same lines as you looking for an efficient OB driver to match up with the Alpha 15's. The Eminence Lil Buddy looks interesting. I found out about it by searching threads.
http://www.guitarcenter.com/Eminenc...ar-Speaker-660063-i1153625.gc?source=4WWRWXGB
Looks just right for OB and certainly as efficient as you're going to get.
I have heard the Audax in OB and it sounds great but not sure it's much more efficient (if at all) than the Fostex driver you want to replace. Plus, it doesn't go as low and has a ragged top end. Too much crossover work for me i think.
My system is in a 'cobbled together' state right now but i do love the sound i get and can spend two hours at a time listening without fatigue. Amazing!
http://www.diyaudio.com/forums/attachment.php?s=&postid=1732647&stamp=1233604947
Yes, the Alpha 15's in H-Frames sound great! Perfect for a home system. There are probably many excellent ways to top them off but hi eff - wide range drivers seem to be the most satisfying for me after all these years of searching/listening/futzing.
I bet your Fostex 167e sounded great until you paired them with the Alpha 15's (love how you can simply stack them as an upgrade - so simple and doens't take any more floor space)... They really are great bass makers. MJK uses Lowther drivers. Perhaps that's the best way to go... but a bit expensive. I'd look to Eminence again. Even some of their newer 8" drivers look amazing, but not really for OB. Seems a touch of pro audio drivers properly tamed could provide amazing sound in the home.
Godzilla
The few MJK designs I've looked at typically have a crossover <400Hz.
Based on my limited understanding and John Kreskovsky's ABC Dipole worksheet, if you raise your crossover point you'll ultimately be limiting your woofer's LF output. With a higher Fc, you need to make your woofer baffle smaller to ensure their dipole peak stays above that frequency.
The result is the need for more EQ resulting in your woofer reaching xmax at a higher frequency.
You can mitigate this somewhat with additional woofers.
A quick look suggests that the difference in LF output between a 150 and 400Hz crossover is 10dB.
Based on my limited understanding and John Kreskovsky's ABC Dipole worksheet, if you raise your crossover point you'll ultimately be limiting your woofer's LF output. With a higher Fc, you need to make your woofer baffle smaller to ensure their dipole peak stays above that frequency.
The result is the need for more EQ resulting in your woofer reaching xmax at a higher frequency.
You can mitigate this somewhat with additional woofers.
A quick look suggests that the difference in LF output between a 150 and 400Hz crossover is 10dB.
well to be clear... i want to use 2 Alpha 15a's. this should raise the efficiency from 90 to 96 maybe.
90 is taking into account the OB roll-of etc... similar to the MJK plans.
Also, on the plans he has lower x-over set at 200 and upper at 400.
sooo... looking for a mid with 95-96db sensitivity and wide flat range. has to do OB of course.
i will look at the B&C also.
the Radian looks promising.
90 is taking into account the OB roll-of etc... similar to the MJK plans.
Also, on the plans he has lower x-over set at 200 and upper at 400.
sooo... looking for a mid with 95-96db sensitivity and wide flat range. has to do OB of course.
i will look at the B&C also.
the Radian looks promising.
I suggest to build a pushpull ripole
I have had Beyma SM118N in mind
Though, it would be a sub only and need active plateamp
Fore midbass you still have plenty power with your Alpha-15
Your Fostex may benefit from removing whizzer cone, but then a tweeter might be needed, but crossed very high any cheap ribbon/planar will do
I have had Beyma SM118N in mind
Though, it would be a sub only and need active plateamp
Fore midbass you still have plenty power with your Alpha-15
Your Fostex may benefit from removing whizzer cone, but then a tweeter might be needed, but crossed very high any cheap ribbon/planar will do
Attachments
B&C 6pev13 and Davis TW26K2
Audiogeek,
What about the following, B&C 6pev and the Davis TW26 double magnet tweeter. Both of them have a sensitivity of over 100dB and massive power handling. I have used both of them in an OB with 3 Yammie 15" JA3882B per side.
The B&C ia also cheap, unfortunately the Davis tweeter is ludicrously expensive. However it is the best high output/high end tweeter that i have ever measured.
Failing that just buy a pair of Tannoy Dual concentrics off me, and use them.
I have a pair of the 6.5" 1667 model and a pair of 8" from the system 8 active monitors.
Cheers,
Peter.
Audiogeek,
What about the following, B&C 6pev and the Davis TW26 double magnet tweeter. Both of them have a sensitivity of over 100dB and massive power handling. I have used both of them in an OB with 3 Yammie 15" JA3882B per side.
The B&C ia also cheap, unfortunately the Davis tweeter is ludicrously expensive. However it is the best high output/high end tweeter that i have ever measured.
Failing that just buy a pair of Tannoy Dual concentrics off me, and use them.
I have a pair of the 6.5" 1667 model and a pair of 8" from the system 8 active monitors.
Cheers,
Peter.
Re: radian 5208c
In about 15-20liter closed it rolls off 130/110hz, so the small Xmax should be no problem
95db may be a bit optimistic though, and an avarage just above 90db would be more realistic
Makes the subs easier, and with better lowend
But you will still need one with good midbass, so a good 15" with Fs/30hz and Qts/>0.35 in BR could be a good option
FaitalPro W15N8-350 from US Speaker may work ok
Or look towards AE
AudioGeek said:
In about 15-20liter closed it rolls off 130/110hz, so the small Xmax should be no problem
95db may be a bit optimistic though, and an avarage just above 90db would be more realistic
Makes the subs easier, and with better lowend
But you will still need one with good midbass, so a good 15" with Fs/30hz and Qts/>0.35 in BR could be a good option
FaitalPro W15N8-350 from US Speaker may work ok
Or look towards AE
I used the B&C 6md38 open baffle in this speaker and it was very nice. It has a sensitivity of around 96db. Mine was paired with the Lambda TD12H ported and the Peerless HDS tweeter in a shallow waveguide. Sensitivity was around 93db or so.
Zaph has a review of the B&C 6md38 on his site here:Zaph|Audio
Zaph has a review of the B&C 6md38 on his site here:Zaph|Audio
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