Hi Janos. Just a vote for a final part five, where the extruded port and the choice of lining is discussed :)) And a big thank you for the excellent content (as usual!!) Claus
Janos# Hi Real World Audio, many thankx for your little series about the Le Petit Speaker. It was very informative and entertaining. i`m the Owner of the original wood coloured Le Petit Speakers that are shown in all the vids from Snake Oil Audio when talking about this topic. And I was always asking myself, why J.H. was constructing this huge squared front plate where the bass tube is fitted in it`s middle. My explaination would be, that he needed a lengh of the bass tube, that wouldn`t fit in this cabinet size, without leaving enough space between the inside end of the tube and the backwall of the cabinet. So the bass resonances couldn`t pass through the bass tube the best possible way. And that J.H. made this Front Plate that big is just for a more "pleasent" and homogeneous look. What do you think. Many THX
Hello Matthias, Apologies for my late reply, I have seen your post when you posted, but since I could not find this video to reply. (I'm making too many videos!) Finally, I found it! Cheers, hello from Hawaii, János
Jurgen from the IamMad channel speculates in a video that having a port and speaker of the same size in the front baffle, would give a see-saw motion which would warp the baffle. He had noticed that very behaviour in the similar 'hummel' (petit with FF125WK, no 'block' on the front) speaker where the baffle vibrated out of control. Adding a mass on one half completely stops such resonances. I could not imagine it was just for aesthetics... it's not really the market JH was catering for with this design.
First of all: Great video!!! I have built a slightly modified version of the LePetit. Unfortunatelly, my room does not fill the dip between 60 and 200 Hz in a way that the frequency response becomes flat. A corner placement (equals two walls) results in a dip of still ca. 7 dB but a placement at the wall (equals one wall) results in a dip of still ca. 14 dB. That's a little bit too much ...
Wow, that's a very difficult room! Sadly, you will need then a speaker where the midbass is EQd quite higher than the rest of the spectrum, flat EQ speakers will not work. Actually, the original Le Petit still has midbass boost.... What you could do is to make the port a lot shorter, and that would bring up the midbass level a lot. Cut the port length into half, and then you will get a lot more in the 60-200 region (at the cost of losing the deep bass.) If that's still not enough cut off even more from the port length.
Dear Janos - thank you so much for the amazing videos! You have taught me so much. Le Petit will be my first speaker project. Question - my listening room is fairly large, and I can’t put the system anywhere else. Since the room will not reinforce mid-bass, would it make sense to use a larger driver and get a flatter frequency response? What are the advantages or disadvantages of trying this approach? Thank you for your thoughts. With kind regards, Jonathan
Hi Janos. Thanks for putting out all the interesting videos! I would like to build Le Petit but have trouble finding the Fostex 103 drivers. The one that's available now is the 103NV model. Looking at the specs the cone mass is twice as much. Which driver do you recommend?
Hello Henk, the 103NV would work well. When you read the Hiraga paper, he mentions that it would be of benefit to have a heavier cone... another I'd suggest is the 126NV, which is 4.5in (slightly larger), I'd choose that to build it with. I'll make a video on several of the current available Fostex line, how they would work .
change the driver for Mark audio so much better drivers something you never mention I don't know why! well he's put the front Square panel to strengthen up the front baffle and to stop the port having interaction with the driver
Well, I am presenting Hiraga's speaker, and not my DIY interpretation of it. After I finished analyzing the design, I will look at other potential drivers ; ). Of note, I have plenty of personal experience with diverse Fostex drivers, but none with Mark audio... will go through its parameters, and check how they would fit the cabinet, but no personal experience to back any of that up.
@@realworldaudio what about building that speaker and see what it's like with the Mark audio drivers and fostex,😀 do you know what that's speakers like??you've haven't had no experience with it?
couple of reasons, strengthen up the baffle reduces residence otherwise the speaker would have to be a lot bigger, and stop interaction between the port and the driver so easily.
@ Yes, it is a big room here too, but many folks find it on the small side... :) It just depends on where one lives... ✨
ปีที่แล้ว
@@realworldaudio You have allot nice videos there. I will be unable to view all of them. 🙂 I gathered allot information. Thank you! I started to design speaker. Can you luck at this and tell if i am on right way for my room?
Hi Janos. Just a vote for a final part five, where the extruded port and the choice of lining is discussed :)) And a big thank you for the excellent content (as usual!!) Claus
Thank you Claus! It's already done, coming out tomorrow ;).
@@realworldaudio Thank you Janos! Claus
Janos# Hi Real World Audio,
many thankx for your little series about the Le Petit Speaker. It was very informative and entertaining.
i`m the Owner of the original wood coloured Le Petit Speakers that are shown in all the vids from Snake Oil Audio when talking about this topic. And I was always asking myself, why J.H. was constructing this huge squared front plate where the bass tube is fitted in it`s middle.
My explaination would be, that he needed a lengh of the bass tube, that wouldn`t fit in this cabinet size, without leaving enough space between the inside end of the tube and the backwall of the cabinet. So the bass resonances couldn`t pass through the bass tube the best possible way.
And that J.H. made this Front Plate that big is just for a more "pleasent" and homogeneous look.
What do you think.
Many THX
Hello Matthias,
Apologies for my late reply, I have seen your post when you posted, but since I could not find this video to reply. (I'm making too many videos!) Finally, I found it!
Cheers, hello from Hawaii, János
Jurgen from the IamMad channel speculates in a video that having a port and speaker of the same size in the front baffle, would give a see-saw motion which would warp the baffle. He had noticed that very behaviour in the similar 'hummel' (petit with FF125WK, no 'block' on the front) speaker where the baffle vibrated out of control. Adding a mass on one half completely stops such resonances. I could not imagine it was just for aesthetics... it's not really the market JH was catering for with this design.
Most Excellent video...you did a great job of explaining how box size / port configuration effect what we will hear.
Much appreciated!
First of all: Great video!!! I have built a slightly modified version of the LePetit. Unfortunatelly, my room does not fill the dip between 60 and 200 Hz in a way that the frequency response becomes flat. A corner placement (equals two walls) results in a dip of still ca. 7 dB but a placement at the wall (equals one wall) results in a dip of still ca. 14 dB. That's a little bit too much ...
Wow, that's a very difficult room! Sadly, you will need then a speaker where the midbass is EQd quite higher than the rest of the spectrum, flat EQ speakers will not work. Actually, the original Le Petit still has midbass boost....
What you could do is to make the port a lot shorter, and that would bring up the midbass level a lot. Cut the port length into half, and then you will get a lot more in the 60-200 region (at the cost of losing the deep bass.) If that's still not enough cut off even more from the port length.
Dear Janos - thank you so much for the amazing videos! You have taught me so much. Le Petit will be my first speaker project. Question - my listening room is fairly large, and I can’t put the system anywhere else. Since the room will not reinforce mid-bass, would it make sense to use a larger driver and get a flatter frequency response? What are the advantages or disadvantages of trying this approach? Thank you for your thoughts. With kind regards, Jonathan
Hi Janos. Thanks for putting out all the interesting videos! I would like to build Le Petit but have trouble finding the Fostex 103 drivers. The one that's available now is the 103NV model. Looking at the specs the cone mass is twice as much. Which driver do you recommend?
Hello Henk, the 103NV would work well. When you read the Hiraga paper, he mentions that it would be of benefit to have a heavier cone... another I'd suggest is the 126NV, which is 4.5in (slightly larger), I'd choose that to build it with. I'll make a video on several of the current available Fostex line, how they would work .
change the driver for Mark audio so much better drivers
something you never mention I don't know why!
well he's put the front Square panel to strengthen up the front baffle and to stop the port having interaction with the driver
Well, I am presenting Hiraga's speaker, and not my DIY interpretation of it. After I finished analyzing the design, I will look at other potential drivers ; ). Of note, I have plenty of personal experience with diverse Fostex drivers, but none with Mark audio... will go through its parameters, and check how they would fit the cabinet, but no personal experience to back any of that up.
@@realworldaudio what about building that speaker and see what it's like with the Mark audio drivers and fostex,😀 do you know what that's speakers like??you've haven't had no experience with it?
Why did Hiraga put the port on a seperate panel stuck to the front panel- looks ugly but does it have a sonic function?
Probably for the lenght of the port in function of the dept of the cabinet........
My hunch coming out tomorrow! Also, how to get rid of the ugly looks, what else needs to be changed for that... ;)
couple of reasons, strengthen up the baffle reduces residence otherwise the speaker would have to be a lot bigger, and stop interaction between the port and the driver so easily.
can you see my comment I think they are chosen 😭
Hi. Very nice video!
You mentioned small room. What size you talking about? Thank you!
My smaller room is about 4m x 6m or 12ft x 16ft
@@realworldaudio Thank you for reply. It is big room in a apartment, in my opinion 🙂
@ Yes, it is a big room here too, but many folks find it on the small side... :) It just depends on where one lives... ✨
@@realworldaudio You have allot nice videos there. I will be unable to view all of them. 🙂 I gathered allot information. Thank you! I started to design speaker. Can you luck at this and tell if i am on right way for my room?