Candidates for Small, Sealed Satellites

Doppler9000 · 6th April 2010, 03:25 PM

Hello,

First posting...

Over the years, I have built several speakers, from two- to four way, as well as a subwoofer (with a Dynaudio 12) the size of a dryer. I am intrigued by the idea of making a sub-sat set-up with a full range driver, crossing in at 70 - 80Hz, in a small sealed box. I have a smallish room, listen to a wide range of music and occasionally like to go loud. I have two Brystom 3B amps. The Jordan JX92S looks interesting, but I was wondering what others should be on my short list. Thanks so much.

John

Scottmoose · 05:02 PM

Hello John, welcome to the forum.

It depends how much you want to spend really. There are a few good alternatives to the Jordan that are worth considering, as the JX is getting a little long in the tooth.

The Fostex range has shrunk over the past few weeks, but the 4 1/2in FX120 and F120a are still available. The latter has the edge in performance, and the cache of a big AlNiCo motor, but as I mentioned elsewhere, the FX is IMO the canny choice of the two as it has most of the performance for half the price.

Then there is the Mark Audio range, of which three drivers come to mind: the Alpair 12 (6 1/2in cone), Alpair 10 (5 1/2in cone; basically the same size as the JX92S) and the Alpair 7 (4in cone).

There are also a handful of Tang Band drivers you might wish to investigate; their range is so wide, it's probably best if you trundle over to their website & have a look to see if anything grabs your attention. Probably a few others, but those are the units that immediately come to mind.

Scott

kagolu · 6th April 2010, 05:26 PM

I just built a small pair of TB W4-1320's in a 6.2 liter vented br box with F3 of around 80 hz. They are vented though. I'm happy so far with them, a little bright but my room is very bright so I think that has a lot to do with it.

planet10 · 6th April 2010, 05:38 PM

Mark Audio CHR-70, Alpair7, 7 litres a good compromise between size & roll-off.

Lots more choices if you can add a "woofer" per side... (ie 105-150 Hz sealed)

Small "vented" also allows more choice

dave

Doppler9000 · 6th April 2010, 05:56 PM

Scott and Dave,

Thanks for the replies.

I will start running more numbers...

Due to the application, I really need sealed and a sub-85Hz crossover point.

John

qingcai · 6th April 2010, 06:28 PM

I hope this works for you:
Zaph|Audio

Doppler9000 · 6th April 2010, 06:31 PM

Well...

It seems that the only potentially viable candidates, TS-wise, are the Jordans, the Alpair 7s (which are pretty inefficient and don`t handle much power) and the Alpair 10s, which are discontinued, pending revision. Everything else seems to have a combo of high Fs and-or low Qts, and exceeding my F3 target.

John

planet10 · 6th April 2010, 06:36 PM

Quote:

Originally Posted by Doppler9000

Well...

It seems that the only potentially viable candidates, TS-wise, are the Jordans, the Alpair 7s (which are pretty inefficient and don`t handle much power)

I'm hoping to measure A7 today. We'll see how it compares in real life. The JX92 smeasured at 86 dB. For home use, the lack of any standards, makes power handling specs meaningless.

I wouldn't discount the CHR-70. I've been promised a comparison review of JX92 vrs CHR70eN soon (Nanook?)

dave

Doppler9000 · 6th April 2010, 07:25 PM

Quote:

Originally Posted by planet10

I'm hoping to measure A7 today. We'll see how it compares in real life. The JX92 smeasured at 86 dB. For home use, the lack of any standards, makes power handling specs meaningless.

dave

Hi Dave,

Using the driver specifications, one can calculate excursion-limited power-handling and attendant SPL levels for a given frequency. For the Alpair 7, I am getting 80Hz power handling of about 5w and max SPL of about 91dB, which is a little lower than I was hoping for. The Jordan gets to about 96dB.

Any word on the TS specs for the new Alpair 10?

John

John

Scottmoose · 6th April 2010, 07:38 PM

Similar to the old. Mark wouldn't leave anyone in the lurch by providing dissimilar parameters.

6th April 2010, 03:25 PM	#1
Doppler9000 diyAudio Member Join Date: Apr 2010	Candidates for Small, Sealed Satellites Hello, First posting... Over the years, I have built several speakers, from two- to four way, as well as a subwoofer (with a Dynaudio 12) the size of a dryer. I am intrigued by the idea of making a sub-sat set-up with a full range driver, crossing in at 70 - 80Hz, in a small sealed box. I have a smallish room, listen to a wide range of music and occasionally like to go loud. I have two Brystom 3B amps. The Jordan JX92S looks interesting, but I was wondering what others should be on my short list. Thanks so much. John

6th April 2010, 04:58 PM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Hello John, welcome to the forum. It depends how much you want to spend really. There are a few good alternatives to the Jordan that are worth considering, as the JX is getting a little long in the tooth. The Fostex range has shrunk over the past few weeks, but the 4 1/2in FX120 and F120a are still available. The latter has the edge in performance, and the cache of a big AlNiCo motor, but as I mentioned elsewhere, the FX is IMO the canny choice of the two as it has most of the performance for half the price. Then there is the Mark Audio range, of which three drivers come to mind: the Alpair 12 (6 1/2in cone), Alpair 10 (5 1/2in cone; basically the same size as the JX92S) and the Alpair 7 (4in cone). There are also a handful of Tang Band drivers you might wish to investigate; their range is so wide, it's probably best if you trundle over to their website & have a look to see if anything grabs your attention. Probably a few others, but those are the units that immediately come to mind. Scott Last edited by Scottmoose; 6th April 2010 at 05:02 PM.

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6th April 2010, 05:26 PM	#3
kagolu diyAudio Member Join Date: Mar 2010 Location: Central Fl	I just built a small pair of TB W4-1320's in a 6.2 liter vented br box with F3 of around 80 hz. They are vented though. I'm happy so far with them, a little bright but my room is very bright so I think that has a lot to do with it.

6th April 2010, 05:56 PM	#5
Doppler9000 diyAudio Member Join Date: Apr 2010	Scott and Dave, Thanks for the replies. I will start running more numbers... Due to the application, I really need sealed and a sub-85Hz crossover point. John

6th April 2010, 06:28 PM	#6
qingcai diyAudio Member Join Date: Jan 2009	I hope this works for you: Zaph\|Audio

6th April 2010, 06:31 PM	#7
Doppler9000 diyAudio Member Join Date: Apr 2010	Well... It seems that the only potentially viable candidates, TS-wise, are the Jordans, the Alpair 7s (which are pretty inefficient and don`t handle much power) and the Alpair 10s, which are discontinued, pending revision. Everything else seems to have a combo of high Fs and-or low Qts, and exceeding my F3 target. John

6th April 2010, 07:38 PM	#10
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Similar to the old. Mark wouldn't leave anyone in the lurch by providing dissimilar parameters.

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