Jamo Oriel - any info available?

[richard_majer]

Hallo,

I'm interested to make a speakers and basic question is how they should look like. I consider Jamo Oriel as very nice and this would be my target for DIY project. I have T330 available.
I'm looking for a data and pictures on the web I have difficulties to find more information. Can you help me please? Does any of you has pictures, dimensions, used speaker specification... best would be drawings :-)

Thank you

[Tenson]

The design really depends on many things such as the drivers you are using and the crossover you design for them. One big thing to note is that the width of the speaker front has a big effect on the sound. Look up 'baffle step' on google.


The best thing for you to do as a first project is follow someone else's good design. Look on this site - www.zaphaudio.com and choose one you like the look of and can afford. DO NOT change the cabinet shape or anything in the design, it all has an effect. You can paint it in whatever colour you want though

Hope that helps.

[Mingo]

Jamo facts: 3 way bass reflex (it should be band-pass) - 2x8" woofers (Vifa maybe?) - 6½" midrange (Eton I suppose) - tweeter (Dynaudio as you state yourself) - sensitivity 87 dB (2.8v/1m) - frequency range 20-22000 Hz - cross-over frequencies 100/3000 Hz - impedance 6 ohms - total volume 210 litres - weight 72 kg - dimensions 178 x 400 x 295 mm (HxWxD)


Woofers placed at the top and bottom respectively in closed volumes and play into reflex chambers. Ports on the front.
Cross-over parts are of ordinary quality: Solen and electrolytic capacitors - "cement" resistors.

[richard_majer]

Thank you for your feedback. I checked Zaph's pages and there is no project which would be interesting for me. I'm looking for three way system.

Regarding impact of front, good remark, I will check what information I can find and learn more...

Are any major disadvantages of band pass system?

[ShinOBIWAN]

Originally posted by richard_majer
I'm looking for three way system.

http://www.troelsgravesen.dk/Diy_Lou...r_Projects.htm
http://www.humblehomemadehifi.com/

[richard_majer]

Do you have any recomendations regarding band pass, please? People around me are not fans of this solution.
Means to have crossover frequency around 80-100Hz... would be too low for three way speaker...

[ShinOBIWAN]

Originally posted by richard_majer
Do you have any recomendations regarding band pass, please? People around me are not fans of this solution.
Means to have crossover frequency around 80-100Hz... would be too low for three way speaker...

Forget the Oriel, your not skilled enough to pull it off yet and you don't have anything like enough information on them.

If you build something that is approachable and well documented, such as those designs from the links I provided a couple of post ago then you'll not only enjoy this but also have something that sounds great and valuable experience.

[richard_majer]

Originally posted by ShinOBIWAN


Forget the Oriel, your not skilled enough to pull it off yet and you don't have anything like enough information on them.

If you build something that is approachable and well documented, such as those designs from the links I provided a couple of post ago then you'll not only enjoy this but also have something that sounds great and valuable experience.

I apriciate your advice, but non of the posted projects doesn't satisfy my expectations in term of design. I know it would be chalenge... yes, to take existing project would be easiest and maybe one day I will give up and make copy of available speakers.

[cph2000]

The bass system used in the Orels is of the "coupled cavity" type, this was very popular about two decades ago. This craze died out for one good reason - it does not sound very good. Systems like this often had a "one note" kind og sound like (but much worse) a basereflex enclosure.

Check out this german shop, it has a lot of designs listed, this one looks serious:

http://www.lautsprechershop.de/hifi/...fi/audimax.htm

[Ian Millar]

I know the last post is years old but what utter garbage. 4th order band pass is second only to sealed enclosures in group delay but without the need for absurd voice coil melting amplifier power levels under resonance for flat response. I have a pair of these speakers and will never willingly part with them. I recently modified the passive crossovers and actively bi-amplified them with an LR 36dB/octave crossover and a little EQ (about 3 dB here and there) on the bass drivers for my difficult room. For their day, these were probably one of the greatest commercial speakers ever produced.

Jamo Oriel Active Bi-amplification « Ian's Projects

Midrange and tweeters are probably a little off the modern mark today, but easily upgradable. I have never heard a system with the same bass quality and control.

If the thread originator wants fantastic response from below 20 Hz to 20 kHz, he would be hard pressed to do better than take from this design.