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-   -   Apex Jr Super 8", Eosone 12, others? (http://www.diyaudio.com/forums/subwoofers/138505-apex-jr-super-8-eosone-12-others.html)

samsagaz 13th February 2009 04:53 PM

Apex Jr Super 8", Eosone 12, others?
 
Hi guys, i want to know if someone know something about these 2 drivers.

I see that Eosone have 91db/SPL, thats nice, but what about sound quality? I want to build 1 subwoofer with 2 drivers or just 2 subwoofers to use in diferents parts or my room.

Thanks for any tip.

Other Driver Recomendation will be appreciated too!

Regards

planet10 13th February 2009 05:15 PM

2 Attachment(s)
I finally got my ApexJr Super 8 sub back intot he system... much better than the 10: sub that it replaced in terms of sonics & integration. Doesn't go down as far (or maybe just not as lumpy), but sitting in the corner it goes planty low for my needs. drivers are fully treated -- they are in a push-push box based on the BR on Steve's site.

dave

samsagaz 13th February 2009 05:56 PM

Quote:

Originally posted by planet10
I finally got my ApexJr Super 8 sub back intot he system... much better than the 10: sub that it replaced in terms of sonics & integration. Doesn't go down as far (or maybe just not as lumpy), but sitting in the corner it goes planty low for my needs. drivers are fully treated -- they are in a push-push box based on the BR on Steve's site.

dave


Thanks again for your support, the only that i dont like too much are the Spl=85.22 @ 1w/1m and FS=47.75Hz

The Eosone 12 have SPL is 91db at 1 watt at one meter
and FS - 23.8926 Hz, but im scared abt get too distorsion or bad sound!, looks like the Eosone will go much lower than the ApexJr.
Btw, you know how much power will handle the Apex Jr Super 8?

Eosone can handle just 125WRMS, but will be a lot loud with 91db/SPL

planet10 13th February 2009 06:28 PM

I have no doubt the 12s will go lower (i'm not familiar with those). I use a 2x50W (8 ohms) amp with my sub. The drivers are 4 ohms, the amp isn't all that super happy with that, but they still work fine.

dave

AdamThorne 13th February 2009 06:38 PM

I made a sub with a 10" Foster sub sold by Jack Hidley and the Apex Sr. plate amp. I'm pretty happy with it. 30 Hz in a sealed box is what I made, but the driver simmed to 17 Hz ported. I haven't tried the ported arrangement, so no promises there.

Wrote about it here:
http://www.diyaudio.com/forums/showt...hreadid=136956

badman 13th February 2009 06:43 PM

Quote:

Originally posted by samsagaz



Thanks again for your support, the only that i dont like too much are the Spl=85.22 @ 1w/1m and FS=47.75Hz

The Eosone 12 have SPL is 91db at 1 watt at one meter
and FS - 23.8926 Hz, but im scared abt get too distorsion or bad sound!, looks like the Eosone will go much lower than the ApexJr.
Btw, you know how much power will handle the Apex Jr Super 8?

Eosone can handle just 125WRMS, but will be a lot loud with 91db/SPL


The 8"s won't ever go low without a lot of room gain but would be fantastic car subs and certainly seem to have good build quality and quite a bit of output. These are "tiny box" subs, which are not to my taste. Bigger subs don't have the same distortion and thermal issues as the tiny ones, but naturally, you need a bigger box. The Eosone are affordable enough to make a big dual isobaric sub (2 isobaric pairs), which would have the same volume as a single sub for similar enclosure alignment. Do the dual isobaric in a 2' cube, and you'll have tons of low distortion LF output. One thing I might do is attach a small tube to the outside of the magnet on the outer woofers and loosely fill with polyfill or the like, to keep the voicecoil vent noise from getting to the listener.

samsagaz 13th February 2009 06:48 PM

Quote:

Originally posted by badman



The 8"s won't ever go low without a lot of room gain but would be fantastic car subs and certainly seem to have good build quality and quite a bit of output. These are "tiny box" subs, which are not to my taste. Bigger subs don't have the same distortion and thermal issues as the tiny ones, but naturally, you need a bigger box. The Eosone are affordable enough to make a big dual isobaric sub (2 isobaric pairs), which would have the same volume as a single sub for similar enclosure alignment. Do the dual isobaric in a 2' cube, and you'll have tons of low distortion LF output. One thing I might do is attach a small tube to the outside of the magnet on the outer woofers and loosely fill with polyfill or the like, to keep the voicecoil vent noise from getting to the listener.



I dont have problems about using big boxes.

Abt big dual isobaric sub you means that i will need 4 drivers?

My main problem is the shipping fee! maybe purchase other sub without distortion will save some bucks?

THanks do you think?

Btw, my room is just 30mt^2 (6x5mts)


Im searchinb google abt dual isobaric :)

planet10 13th February 2009 08:33 PM

2 Attachment(s)
Quote:

Originally posted by samsagaz
Abt big dual isobaric sub you means that i will need 4 drivers?
Like the attached... i have some 20 12" foster bass drivers -- i'd like to try some of them out in one of these.

dave

Shaun 13th February 2009 09:21 PM

Quote:

Originally posted by samsagaz
Thanks again for your support, the only that i dont like too much are the Spl=85.22 @ 1w/1m and FS=47.75Hz

The Eosone 12 have SPL is 91db at 1 watt at one meter
and FS - 23.8926 Hz, but im scared abt get too distorsion or bad sound!, looks like the Eosone will go much lower than the ApexJr.
Btw, you know how much power will handle the Apex Jr Super 8?

Eosone can handle just 125WRMS, but will be a lot loud with 91db/SPL

I doubt that 91 dB is a realistic figure for a sub driver. The Super8's sensitivity sounds about right. Don't let it scare you off. I guesstimate the Super8's power handling capability to be no more than 150W. But in any case, there's not much difference subjectively between 100W and 150W (at least, not as much as the figures suggest). The Super8 performs way better than its price suggests, and it is built like a tank. But it has to be judged on its own merits. As mentioned, it does not go very low. Yet it can do the job in smaller rooms or in a car.

HTH

badman 19th February 2009 03:04 AM

That's 91dB at 2.83V into 4 ohms=2 watts. And, look at the large VAs. The sub can manage fairly high efficiency because it takes big boxes and has a powerful magnet.


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