driver suggestion for OB

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jimbones

driver suggestion for OB
« on: 5 Jan 2018, 02:21 am »
Looking for a driver suggestion for OB no equalization: I only need it to get down to 130-140hz and will have flexibility in crossing over somewhere between 1700 and 2500 to tweeter. Thanks.

JohnR

Re: driver suggestion for OB
« Reply #1 on: 5 Jan 2018, 05:10 am »
I think "no EQ" will require a pretty wide baffle... With that said, how about an AE Dipole12?

http://aespeakers.com/shop/dipole/dipole12/

JohnR

Re: driver suggestion for OB
« Reply #2 on: 5 Jan 2018, 05:53 am »
Oh, for some reason I was thinking 1300 for the crossover. Maybe not then.

JohnH12

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Re: driver suggestion for OB
« Reply #3 on: 7 Jan 2018, 12:58 am »
To reach 2K while maintaining constant directivity will require a narrow baffle.  To extend down to 130 Hz is not likely with one driver and no boost.  Might consider multiple 3 or 4 inch drivers with an increasing baffle width.

jimbones

Re: driver suggestion for OB
« Reply #4 on: 7 Jan 2018, 02:58 am »
I'm willing to make it a 3 way. Main thing is getting to about 140 hz

FullRangeMan

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Re: driver suggestion for OB
« Reply #5 on: 7 Jan 2018, 03:36 am »
To reach 2K while maintaining constant directivity will require a narrow baffle.  To extend down to 130 Hz is not likely with one driver and no boost.  Might consider multiple 3 or 4 inch drivers with an increasing baffle width.
With this 4 inches FR he dont will need a tweeter and even a xover:
http://www.madisoundspeakerstore.com/approx-4-woofers/sb-acoustics-sb12pac25-4-4-aluminum-cone-woofer/#tab-1
Sensitivity is 87dB, Fs 52Hz and it reach 20kHz, only $28, 4 ohms proper to series connection.

jimbones

Re: driver suggestion for OB
« Reply #6 on: 7 Jan 2018, 03:20 pm »
With this 4 inches FR he dont will need a tweeter and even a xover:
http://www.madisoundspeakerstore.com/approx-4-woofers/sb-acoustics-sb12pac25-4-4-aluminum-cone-woofer/#tab-1
Sensitivity is 87dB, Fs 52Hz and it reach 20kHz, only $28, 4 ohms proper to series connection.

response looks like it falls off pretty much after 2k

jimbones

Re: driver suggestion for OB
« Reply #7 on: 7 Jan 2018, 07:23 pm »
what about this driver?
Scanspeak Classic 25W/8565-00 10" Woofer

FullRangeMan

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Re: driver suggestion for OB
« Reply #8 on: 7 Jan 2018, 07:47 pm »
response looks like it falls off pretty much after 2k
Yes, this will do a gentle treble presentation and the 12kHz peak will enhancement the treble harmonics. This driver should have 1 ohms impedance for multiple serial connection, w/these 4 ohms its possible use just 4 in series w/a 16 ohms OPT, also 87db dont help.

FullRangeMan

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Re: driver suggestion for OB
« Reply #9 on: 7 Jan 2018, 09:07 pm »
what about this driver?
Scanspeak Classic 25W/8565-00 10" Woofer
This other similar driver have a a more flat midrange:
https://www.madisoundspeakerstore.com/approx-4-woofers/sb-acoustics-sb12pfc5-04-4-reed-

jimbones

Re: driver suggestion for OB
« Reply #10 on: 8 Jan 2018, 12:24 am »
that 4 in driver will get down to 140hz?!!

FullRangeMan

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Re: driver suggestion for OB
« Reply #11 on: 8 Jan 2018, 12:32 am »
that 4 in driver will get down to 140hz?!!
Not in OB, but yes in a BassReflex box since the Fs is 58Hz, in these conditions it can down til 50-60Hz easily, I would not use any sub for hi-fi music appliance.

jimbones

Re: driver suggestion for OB
« Reply #12 on: 8 Jan 2018, 12:35 am »
Im looking for an OB driver.

FullRangeMan

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Re: driver suggestion for OB
« Reply #13 on: 8 Jan 2018, 12:47 am »
Im looking for an OB driver.
On that 140-2500Hz wide Freq Range you want there is none for OB due technology restrictions currently.

OBS.: You would email Madisound asking if this driver suit your requirements as the QTS is 0.40:
https://www.madisoundspeakerstore.com/approx-6-7-woofers-sb-acoustics/sb-acoustics-sb16pfc25-8-6-paper-cone-woofer/
Or this:
https://www.madisoundspeakerstore.com/approx-6-7-woofers-sb-acoustics/sb-acoustics-sb17mfc35-4-6-poly-cone-woofer/

jimbones

Re: driver suggestion for OB
« Reply #14 on: 8 Jan 2018, 02:22 am »
I figure that if I cant find an OB driver to take me from 140-2k, I can make it a 3 driver set up to get the range I need.

FullRangeMan

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Re: driver suggestion for OB
« Reply #15 on: 8 Jan 2018, 02:37 am »
I figure that if I cant find an OB driver to take me from 140-2k, I can make it a 3 driver set up to get the range I need.
To my personal taste I would stick w/one PAP 15Neo and one Visaton B200 or Alpair paper cone or Nirvana Alnico, no xover or at max an Goertz AlphaCore air core 4.7mH that I already have, its the usual proved recipe.

FullRangeMan

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Re: driver suggestion for OB
« Reply #16 on: 8 Jan 2018, 05:37 am »
Note that w/an 8 inches you can goes down til 250/300Hz, w/an 10 inches you can go up til 1200Hz if I remember well, but I can be wrong.