Hi, I was wondering if I could get some advice about speaker designs with dual bass drivers.
At the moment I am looking at the FANE sovereign 8-225 and planning to have two of these drivers / enclosure. Havent looked at high frequency drivers much yet, but was thinking about compression driver, possibly the P-Audio BM-D450, and a dome/ bullet tweeter to cover the extra highs.
Does anyone have any experience with either the Fane or P-Audio drivers?
Secondly I was wondering how multiple bass drivers will work in term of pressure / frequency decline. Because the efficiency declines with frequency - for the fane drivers, it is about -4dB at 100Hz, with two drivers, would this be the same (-4dB) or would it be 1/2 of that (-2dB)?
finally, with enclosure design programs (I am currently using WinISD), does anyone know if they allow for the drivers efficiency decline with frequency, or do they solely calculate the enclosure gain? I was thinking to attempt to slightly compensate for the drivers efficiency decline by giving the enclosure a gain of around 2 - 4dB around 100Hz, so the speaker would have a level response down to 80 / 90 Hz, is this a good idea, or should i just leave it level?
thanks in advance,
At the moment I am looking at the FANE sovereign 8-225 and planning to have two of these drivers / enclosure. Havent looked at high frequency drivers much yet, but was thinking about compression driver, possibly the P-Audio BM-D450, and a dome/ bullet tweeter to cover the extra highs.
Does anyone have any experience with either the Fane or P-Audio drivers?
Secondly I was wondering how multiple bass drivers will work in term of pressure / frequency decline. Because the efficiency declines with frequency - for the fane drivers, it is about -4dB at 100Hz, with two drivers, would this be the same (-4dB) or would it be 1/2 of that (-2dB)?
finally, with enclosure design programs (I am currently using WinISD), does anyone know if they allow for the drivers efficiency decline with frequency, or do they solely calculate the enclosure gain? I was thinking to attempt to slightly compensate for the drivers efficiency decline by giving the enclosure a gain of around 2 - 4dB around 100Hz, so the speaker would have a level response down to 80 / 90 Hz, is this a good idea, or should i just leave it level?
thanks in advance,
The recommended cabinet size for the Fane Sovereign 8-225 is 20-30 liters. Two drivers need 40-60 liters. Wired in parallel, the resulting speaker impedance will be 4 ohm. High efficiency drivers generally go very loud, but not very deep (60-70 Hz in your case).
The early rolloff in the frequency response in the datasheet (http://www.fane-acoustics.com/downloads/Fane Sovereign 8225 DS030513.pdf) below 200 Hz can be improved by an appropriate vent. Use WinISD to explore the effect of different vents and volumes.
Two examples of Sovereign 8-225 implementations:
Wow this 8" thing goes low!!! (My first "Baby Blue on steroids" DIY cab) | TalkBass.com
Gummifuß ? the mini boombox - Speakerplans.com Forums - Page 1
The early rolloff in the frequency response in the datasheet (http://www.fane-acoustics.com/downloads/Fane Sovereign 8225 DS030513.pdf) below 200 Hz can be improved by an appropriate vent. Use WinISD to explore the effect of different vents and volumes.
Two examples of Sovereign 8-225 implementations:
Wow this 8" thing goes low!!! (My first "Baby Blue on steroids" DIY cab) | TalkBass.com
Gummifuß ? the mini boombox - Speakerplans.com Forums - Page 1
With two midbass drivers, one could be used as fill below the baffle-step.
I have used P.Audio BM-D440, decent driver for the price, comparable to D220Ti I'd say. Never used Fane products. I don't know if the Sovereign line is anything like that, but I've always found it looks like a close cousin to the Celestion Truvox line. I used the TF1020 in Karlson and MLTL to good effect.
I have used P.Audio BM-D440, decent driver for the price, comparable to D220Ti I'd say. Never used Fane products. I don't know if the Sovereign line is anything like that, but I've always found it looks like a close cousin to the Celestion Truvox line. I used the TF1020 in Karlson and MLTL to good effect.
Fane are honest but uninspiring. You get what you pay for. If cone is naked and then treated with modpodge, that can improve sound quite a bit but ultimately they're still 'bargain drivers'.e
Hi, thanks for the responses.
yes, I dont need these speakers to go deep (my sub is currently at 80Hz, and should be flat up to at least 120) so that is not an issue, Like i said, it would be nice to get a flat driver response at least down to 90 Hz, and then tail off after that. With one driver I would need the box to compensate by having a 3db gain at around 100Hz. With two drivers would the box need a 3Db gain, or a 6?
also I dont know what is generally recommended with horns for the compression drivers, What kind of dispersion angles would people recommend (for a Hifi setup)? something like this seems like a good option... Fane :: Fane FH.386 1" Throat Screw On Horn Flare 100 x 60 Dispersion 8.99 IN STOCK (12 Jun 2014)
thanks,
yes, I dont need these speakers to go deep (my sub is currently at 80Hz, and should be flat up to at least 120) so that is not an issue, Like i said, it would be nice to get a flat driver response at least down to 90 Hz, and then tail off after that. With one driver I would need the box to compensate by having a 3db gain at around 100Hz. With two drivers would the box need a 3Db gain, or a 6?
also I dont know what is generally recommended with horns for the compression drivers, What kind of dispersion angles would people recommend (for a Hifi setup)? something like this seems like a good option... Fane :: Fane FH.386 1" Throat Screw On Horn Flare 100 x 60 Dispersion 8.99 IN STOCK (12 Jun 2014)
thanks,
I would go with a constant-directivity waveguide for hi-fi. I like the QSC waveguide and currently use it with BMS 4550. Other choices are SEOS, JBL Progressive-Transition units. I don't know what's easily available and affordable in the UK for this category though. These are all affordable waveguides, but overseas shipping can kill a good deal. :/ As for true horns, Tractrix or conical with smooth transition and large mouth roundovers would be better than the Fane you linked to IMO.
Last edited:
- Status
- Not open for further replies.