Jordan Transmission Line Speakers & Sub

[JVA]

I've noticed there has been a lot of interst in Transmission Line Speakers with Jordan drivers. I thought I'd place a few pictures in this thread. Everything is according to Jordan specs including the sub which are Jordan 125's in a 66 litre 4" ported closure. The Jordan sub crosses over at about 125 cycles to the mains. I also use a test disc on the sub and noticed that the bass is audible to below 20 cycles, which to me was amazing. After breaking in, both mains and the sub which took quite a few days, the sound was very up front and clear. The sub blended in perfectly with the mains. If you notice in the Jordan website, what I made into a sub was actually bass speakers to cross over to their 52's. In stead I made it into a full blown sub using a Hypex sub amp at 125 watts into 4 ohms. All of it worked wonderfully.

[JVA]

Here is a picture of the sub

[navin]

what are the mains? 53 or 92?

[THOR]

Ill bet you are delighted !

[VT67]

Hi JVA

Yesterday I've ordered a pair of E.J.JORDAN JX 92 S.
Plan is to build me some speakers for the hobbyroom or bedroom.
Nothing fancy, a full range unit in a cabinet as per Jordan's specs. Really curious how these things will play?

Cheers

Walter

[JVA]

Hi Navin;
The mains are 92's

Hi GE.WA;
The Jordans go down to appox. 45 cycles. These flat transmission line units make for an excellent small to medium room speaker. There is no need for a sub. The only reason why I created a sub was to enhace the lower to mid bass to the sub bass, which is 150 to 25 cycles. I still love good pounding bass at times, however it drives my wife nuts (It's a man thing I tell my wife, but she doesn't get it).

Good luck on your project!

To THOR;
You bet I am!

[nonamekid]

Nice work! - I bet they sound fabulous. I use JX92s and a pair of stereo subs - systemt biamped and actively crossed at 110hz. -as nearfield monitors in my computer based project studio and love them. Definition, imaging, flat response. I swear by the stereo subs. Simple closed cabs, simple signal path. I also measure good response below 20 hz and up through 20k. Photo attached.

[DrDave]

nonamekid,

I am also using the Jordans as computer speakers. Sort of a stretched version of Jim Griffin's design.

I'm going to add a sub. Can you give any details on what you made?

Don't think I have the desktop space so I'm thinking an Adire DPL12 under the desk.

[JVA]

NONAME KID

I like your monitors, nice base on the sub. I always believed that acoustic suspension is the way to go, especially for speakers in small rooms. I find that you should have 4" or larger full range speakers with at least decent cone movement to get proper volume. Two examples of good speakers are the Jordan 92's or CSS New 4". As to a sub, I made a closed box sub for a friend recently to match his "Maggies". The speed of the Shiva was perfect for these fast flat panels. Acoustic suspensions (closed box) subs usually match the best when it comes to fast main speakers.

JOE

[nonamekid]

Dr. Dave - On the theory that low frequency waves are too long to allow you to determine directionality, I put a single sub under my counter and was very dissapointed. Though it may be true that in bigger spaces directionality for subs is not an issue, in my space and monitoring in the near field it was a big issue. I have been very pleased with the stereo subs. One plus has been that I can line the cones of the Jordans and the subs up precisely - I can hear the difference. I also had my Jordans in ported cabs - designs of Teds (like yours I think) - and didn't like the sound that much. Putting them in the cubes (Teds smallest cab) tightened them up considerably. Getting the lows out of them also helped the rest of their range noticeably.
The subs I built use these drivers: http://www.partsexpress.com/pe/showd...ID=16242&DID=7
which a lot of folks here will sneer at; however, for moderate volume applications they are surprisingly good, designed as a sub and functional below 20hz (and pretty cheap!). Maybe not a good choice for big room home theater stuff, but more than adequate for studio monitoring. Their sensitivity is a good match for the Jordans. Active crossover at 110hz (one of my worst room modes) using a kit from Marchand Electronics, Alesis reference amp for Jordans and strong Parasound amp for subs. Hope this helps.

NNK