Okay, I'll bite. 
Based off the basic spec. of the FE103 Sigma & the dimensions of the box listed (just over 26 litres internal assuming the 25mm build material assumed) with the specified 70mm x 139mm untapered duct, the alignment is basically as Dave lists assuming a voltage source amplifier. I can't speak more than a basic smattering of French, but I know the box type well enough. This style of over-sized / 'acoustically efficient' low-tuned vented enclosure was quite popular some years ago in Japan for use small rooms with thin stud / partition walls that leach LF, and predominantly assuming a high output impedance amplifier -usually a SET with about 4ohms. Assuming a near-wall positioning, that helps fill in most of the losses in the mid-upper bass & leaves a peaking ~'one note' alignment around Fb which can give the impression of some extra 'weight' to the LF as it's increasingly bled away via losses, and as power-compression sets in due to the minimal power-handling. It's not an alignment I like myself, but assuming the above conditions & low SPLs it does seem to suit some needs, especially on relatively undemanding types of acoustic music (in terms of dynamic range etc.). YMMV as always.
Based off the basic spec. of the FE103 Sigma & the dimensions of the box listed (just over 26 litres internal assuming the 25mm build material assumed) with the specified 70mm x 139mm untapered duct, the alignment is basically as Dave lists assuming a voltage source amplifier. I can't speak more than a basic smattering of French, but I know the box type well enough. This style of over-sized / 'acoustically efficient' low-tuned vented enclosure was quite popular some years ago in Japan for use small rooms with thin stud / partition walls that leach LF, and predominantly assuming a high output impedance amplifier -usually a SET with about 4ohms. Assuming a near-wall positioning, that helps fill in most of the losses in the mid-upper bass & leaves a peaking ~'one note' alignment around Fb which can give the impression of some extra 'weight' to the LF as it's increasingly bled away via losses, and as power-compression sets in due to the minimal power-handling. It's not an alignment I like myself, but assuming the above conditions & low SPLs it does seem to suit some needs, especially on relatively undemanding types of acoustic music (in terms of dynamic range etc.). YMMV as always.
Thats a great explanation, thanks Scottmoose! I did scan the article and posted a google translate on the previous page, reads decent enough to understand.
Do you think this low tuning would work to deterimentally in a brick/concrete walled room?
Do you think this low tuning would work to deterimentally in a brick/concrete walled room?
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To be completely honest, I'm not much of a fan of it in any situation -it seems to suit some (fair enough), but there are other approaches I'd take over this sort of alignment. In a room with fewer losses -especially if the amplifier isn't of the type that is likely optimal- I suspect it would be a 'characterful' but not necessarily a very good performer. But that's just me -all speakers are a compromise & we're just picking the ones we can live with for our partiuclar requirements or preferences.
Likely a few ways to " fix" it
Just use a wideband more suitable for the airspace like a 6" or 6.5"
Or if you want to use a smaller wideband.
You could just get rid of most the airspace by making a
Big Vent Reflex.
Likely the big flare for the vent would remove enough space
to make it work
Just use a wideband more suitable for the airspace like a 6" or 6.5"
Or if you want to use a smaller wideband.
You could just get rid of most the airspace by making a
Big Vent Reflex.
Likely the big flare for the vent would remove enough space
to make it work
I’m waiting on parts so I can get started. My expectation of this speaker is that it will hopefully sing with music that is more acoustic- as in music that is not featuring amplifiers as big aspect of the performance. It’s tempting to use the slightly larger mention dimensions that Janos recommends, but at the moment I’m leaning towards the original dimensions. I won’t be dissatisfied if it is not a hip-hop beast. I have something I can listen to that on anyway. Hopefully I’ll get some insight into early Miles Davis and not …uh….hey Siri, what’s the name of Elvis Costello’s wife?
i also got bitten by the bug / bought the snake oil, etc..
trying this design out for a first build.
has anyone tried this out with Markaudio CHR-70s? i found a cheap pair. Janos recommends the Markaudio Alpair so im hoping these arent too different.
trying this design out for a first build.
has anyone tried this out with Markaudio CHR-70s? i found a cheap pair. Janos recommends the Markaudio Alpair so im hoping these arent too different.
You should build a box for the CHR not for something else. I have not heard a CHR for a long time, they aren’t Alpairs but they are decent.
dave
dave
ok would you say that the fostex from the original design is an essential part of the sound of the Petit? im going off of janos' video describing all the other driver options for the build.
im also interested in swapping out drivers in the enclosure once its all together to see what that does.
im also interested in swapping out drivers in the enclosure once its all together to see what that does.
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I;d say that the Petitie is not a design i would ever consider building. Wrong for the FE103 (of any ilk) and cetainly not for the CHR as well.
dave
dave
Hi,
I've built the Le Petit with FE103NV2 and now Janos La Grande with FF125WK.
I'm a newbie in DiY speakers, but would say I dove have some decent (commercial) chains at home for serious comparison.
La Grande (slotport):
.. yes, I do have in my main chain a quite decent highend (for my budget) system and still couldnt believe how good this cabinet can play.
Electro, Jazz, Classical...
I've built the Le Petit with FE103NV2 and now Janos La Grande with FF125WK.
I'm a newbie in DiY speakers, but would say I dove have some decent (commercial) chains at home for serious comparison.
La Grande (slotport):
- Tested with my lovely 2x13Watt PX4 Tube Amp, Quad 405-2 stereo fully custom with Kaneda PreAmp
- I'm very, very impressed - soundstage is astonishing, of course not a bass monster, but still
- Le Petit is in my opinion more nearfield and you need to sit in the spot (have listened two 2 different FE103 / FE103NV2)
- Le Grande is the opposite, sitting in my other living room and still you can enjoy listening music from other room
.. yes, I do have in my main chain a quite decent highend (for my budget) system and still couldnt believe how good this cabinet can play.
Electro, Jazz, Classical...
Attachments
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The FE103nv should be happier in such a big box than the original.
The translam is pretty but not very material efficient or as strong. Your panels are a bit skinny IMO since you are using the material in a direction where it is its weakest.
dave
The translam is pretty but not very material efficient or as strong. Your panels are a bit skinny IMO since you are using the material in a direction where it is its weakest.
dave
1. I'd NO experience with full range speaker before & always owned some 2-3-way speakers (horn, bass-reflex - listened at retailer to Cube Audio and Pearl Accoustics)
2. Those speakers are special and not a replacement for the average mass-consumer 3-way or bookshelf speakers
Le Petit: (FE103/FE103NV2)
- you'll be surprised how precise (high/mid) it plays
- Bass is limited, but still better than average (unmodified) bookshelf (don't forget NO crossover - pure chassis + cabinet design)
- You should play around with bass reflex pipe (don't mount it fix, play around with it, makes a difference, depending on your room)
Le Grande: (FF125WK)
- Much bigger soundstage (of course cabinet is bigger)
- Slot port instead of bass-reflex, therefore in my case with putting them closer to the floor, low frequencies are surprisingly good
- Speaker cable (Kimber 8VS) directly solded, spades are from WBT
- They are different and if you try to start to build, I'd recommend to go with Le Grande if you are looking for a fully-fledged speaker.
- Le Petit is still pretty good (I'd not go too crazy as people describe, what's the best Fostex/Tang Band etc for it, start simple & stick with the dimensions)
- In my opinion, they amp-matching, if you have tube amps and 6-8Watt per channel is enough - for average listening (they are not high efficiency ;-) My PX4 with 2x13Watt is pretty perfect match. Quad/Kaneda way overkill
Hope this helps
Gerald
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On the FF125wk? That can be greatly amerioted with a few easy mids and a ton of break-in.
dave
Here is a link to some La Grande stuff
https://www.youtube.com/@realworldaudio/videos
I cringe a bit on a singing box..........
And the driver rear mounted.......
https://www.youtube.com/@realworldaudio/videos
I cringe a bit on a singing box..........
And the driver rear mounted.......
I DO NOT measure, I just listen - i'm not chasing the best full range speaker. This was a project less €500.
Sizes: sorry, German ;-)...all internal dimensions
- Milling behind the drivers I did quite a bigger area as shown here on the picture, go give enough air behind.
- Rear mounting I didn't like, because wanna have bigger/wider soundstage filling the room