Driver selection

germpod · 18th May 2007, 02:09 AM

I just ordered a 300 watt BASH amp from Parts Express and am planning on using two subs in a ported push-push configuration to mate with my Harvey's using FE126e drivers.

I am looking at Dayton Reference Series 8" or 10" drivers and am wondering if people have any better suggestions than that driver in a similar price range (less than $60 per driver). I would like the driver response to be close to 20Hz. Enclosure size is flexible and I prefer good bass to just lots of it. I also have neighbors so I can not get too crazy, though I live in a house so it is nothing restrictive like an apartment or anything.

Any suggestions are appreciated.

Ed

germpod · 18th May 2007, 02:51 AM

I forgot to mention it will only be used for music and that I listen to most types of music.

kscharf · 22nd May 2007, 08:28 PM

Apex JR has a nice 12" subwoofer driver that looks nice, and the
price is right. Try two in an isobarick (mouth to mouth) and it
will cut the vas in half.

http://www.apexjr.com/speakerstuff.html

germpod · 31st May 2007, 12:05 AM

Planet-ten sold me on the push-push idea so that is the route I am going to go. I am planning on running both woofers off the same amp, unless that is not possible, but from what I understand when I do that it will halve the ohms of the drivers, so two 8ohm drivers would drop down to 4ohms which is ok, but 4ohm drivers would drop to 2ohms which is bad. The Apex-Jr woofers are four ohms so I was thinking that an 8ohm driver is a better choice.

I may be totally wrong, I am quite often, and if so then I can change what my plans are and any help is appreciated.

On a side note do you guys think it is a bad idea to use regular woofers as sub woofers?

kscharf · 1st June 2007, 12:11 AM

Note that you can connect two 4 ohm drivers in series
in a push pull setup. The total impedance would then
be 8 ohms, which you amp could handle.

Cal Weldon · 1st June 2007, 01:24 AM

Quote:

Originally posted by germpod
On a side note do you guys think it is a bad idea to use regular woofers as sub woofers?

(rant hat on) The two terms seem interchangeable these days. When I was young a subwoofer had an Fs of 20 Hz or below. Now it just seems to mean "fairly long throw with a fat surround" bass driver. For example, there are 6.5" mid bass drivers with a lower Fs than a 15" PA driver called a subwoofer. You figure it out. (rant hat off)

No it's not a bad idea. It's all in what you are looking for. Every driver has it's plus' and minus'

Cal Weldon · 1st June 2007, 01:30 AM

Quote:

Originally posted by kscharf
Note that you can connect two 4 ohm drivers in series
in a push pull setup. The total impedance would then
be 8 ohms, which you amp could handle.

Series push pull?

So instead of going from - to + in the series you wire them - to - ?

Nanook · 1st June 2007, 05:13 AM

like this?

planet10 · 1st June 2007, 05:39 AM

Quote:

Originally posted by germpod
I understand when I do that it will halve the ohms of the drivers, so two 8ohm drivers would drop down to 4ohms which is ok, but 4ohm drivers would drop to 2ohms which is bad. The Apex-Jr woofers are four ohms so I was thinking that an 8ohm driver is a better choice.

I saw the ApexJr 12s, the 4 ohms, and your budget and immediately thot push-push push-pull isobarik woofer... series/parallel wiring brings you to 4 ohms and you can put all 4 woofs in a 2.5 ft^3 box. The advantages of push-push for newtonian cancellation and push-pull to reduce IM distortion.

They only downside is that the back of 2 of the woofers face out (could be hidden if you build a donut box....) and a bit tricker box detailing.

dave

germpod · 1st June 2007, 06:01 AM

Thanks a lot everybody.

Planet-Ten are you describing two drivers facing in and two out, or three facing out and one in? There were three pushes stated and one pull, but then you mention two drivers with the back sticking out which I thought would be the pull drivers.

I am quite excited that the Apex-Jr. twelves should work and this new box design sounds very interesting and am looking forward to having a better mental picture to work with.

Drivers with their back side out is no problem, my wife is very understanding and likes to listen to good sounding music with me. You can force a person compromise on a hobby for home asthetics, withan reason.

18th May 2007, 02:09 AM	#1
germpod diyAudio Member Join Date: Dec 2006	Driver selection I just ordered a 300 watt BASH amp from Parts Express and am planning on using two subs in a ported push-push configuration to mate with my Harvey's using FE126e drivers. I am looking at Dayton Reference Series 8" or 10" drivers and am wondering if people have any better suggestions than that driver in a similar price range (less than $60 per driver). I would like the driver response to be close to 20Hz. Enclosure size is flexible and I prefer good bass to just lots of it. I also have neighbors so I can not get too crazy, though I live in a house so it is nothing restrictive like an apartment or anything. Any suggestions are appreciated. Ed

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18th May 2007, 02:51 AM	#2
germpod diyAudio Member Join Date: Dec 2006	I forgot to mention it will only be used for music and that I listen to most types of music.

22nd May 2007, 08:28 PM	#3
kscharf diyAudio Member Join Date: Apr 2007	Apex JR has a nice 12" subwoofer driver that looks nice, and the price is right. Try two in an isobarick (mouth to mouth) and it will cut the vas in half. http://www.apexjr.com/speakerstuff.html

31st May 2007, 12:05 AM	#4
germpod diyAudio Member Join Date: Dec 2006	Planet-ten sold me on the push-push idea so that is the route I am going to go. I am planning on running both woofers off the same amp, unless that is not possible, but from what I understand when I do that it will halve the ohms of the drivers, so two 8ohm drivers would drop down to 4ohms which is ok, but 4ohm drivers would drop to 2ohms which is bad. The Apex-Jr woofers are four ohms so I was thinking that an 8ohm driver is a better choice. I may be totally wrong, I am quite often, and if so then I can change what my plans are and any help is appreciated. On a side note do you guys think it is a bad idea to use regular woofers as sub woofers?

1st June 2007, 12:11 AM	#5
kscharf diyAudio Member Join Date: Apr 2007	Note that you can connect two 4 ohm drivers in series in a push pull setup. The total impedance would then be 8 ohms, which you amp could handle.

1st June 2007, 06:01 AM	#10
germpod diyAudio Member Join Date: Dec 2006	Thanks a lot everybody. Planet-Ten are you describing two drivers facing in and two out, or three facing out and one in? There were three pushes stated and one pull, but then you mention two drivers with the back sticking out which I thought would be the pull drivers. I am quite excited that the Apex-Jr. twelves should work and this new box design sounds very interesting and am looking forward to having a better mental picture to work with. Drivers with their back side out is no problem, my wife is very understanding and likes to listen to good sounding music with me. You can force a person compromise on a hobby for home asthetics, withan reason.