Re Hamlet Speaker - New More Compact Box Deign:
My circumstances have changed somewhat last year and my bread-and-butter work was upgrading Oppo 105 and 205 players (plus the occasional 203) and that has largely collapsed since streaming has taken over. The upgraded Oppos are amazing for streaming if you know how, but that is not so well known. Also I am now considered semi-retired by the government. So it is with some regret... please read on.
I was approached by a client and as part of that assignment I did something that was a logical thing to do, I redesigned the box of the Hamlet so that it is a bit more compact all round and also a definite improvement in a number of ways. The regretful part is that it is commercial and that it will cost a very fair $120 into my PayPal account. I put my trust that the person will not pass it on to others. And since the cost is so modest, only a cheapskate would do that. So it will be on the honour system.
Below is the overall dimensions:
It can be used vertically as stereo pairs or in multi-channel situations, and of course on its side as a front centre channel. The drivers continue to be "MFC" and the crossover has not changed. Same goes for the Tweeter and Waveguide. There is also a space created at the rear of the cabinet where the Black Crossover PCB fits, the Green PCB does not fit.
You can use the PayPal link below.
www.paypal.com/paypalme/BjoernRasmussen/120
Hope it meets with some approval.
My circumstances have changed somewhat last year and my bread-and-butter work was upgrading Oppo 105 and 205 players (plus the occasional 203) and that has largely collapsed since streaming has taken over. The upgraded Oppos are amazing for streaming if you know how, but that is not so well known. Also I am now considered semi-retired by the government. So it is with some regret... please read on.
I was approached by a client and as part of that assignment I did something that was a logical thing to do, I redesigned the box of the Hamlet so that it is a bit more compact all round and also a definite improvement in a number of ways. The regretful part is that it is commercial and that it will cost a very fair $120 into my PayPal account. I put my trust that the person will not pass it on to others. And since the cost is so modest, only a cheapskate would do that. So it will be on the honour system.
Below is the overall dimensions:
It can be used vertically as stereo pairs or in multi-channel situations, and of course on its side as a front centre channel. The drivers continue to be "MFC" and the crossover has not changed. Same goes for the Tweeter and Waveguide. There is also a space created at the rear of the cabinet where the Black Crossover PCB fits, the Green PCB does not fit.
You can use the PayPal link below.
www.paypal.com/paypalme/BjoernRasmussen/120
Hope it meets with some approval.
Joe:
You have been incredibly (and almost unbelievably) generous in your development and documentation of the Elsinore and Hamlet loudspeakers, and in my experience the cost to value ratio for the Elsinores is off the charts. I still hope to build Hamlets in the not-too-distant future and compensating you for the privilege is certainly fair. And now a new and improved version of the Hamlets? Even better.
Regards,
Scott
You have been incredibly (and almost unbelievably) generous in your development and documentation of the Elsinore and Hamlet loudspeakers, and in my experience the cost to value ratio for the Elsinores is off the charts. I still hope to build Hamlets in the not-too-distant future and compensating you for the privilege is certainly fair. And now a new and improved version of the Hamlets? Even better.
Regards,
Scott
I like design very much. Which crossover match this project? Could ULD version (Purifi) be built too?
The Hamlet with the "MFC" drivers (2SB17MFC35-8) and the same Crossover. At this stage ULD version not on the horizon.
I suspect the reason people asking about a ULD Hamlet is that they want to tap into a way to get the ULD performance (in regards to the mids and highs) without having to buy 8 of them. It makes sense. However, I suspect that it may not be as telling as people think?
It comes down to time and not to mention cost. At the moment there are some fairly important things before me that will demand my attention as a priority. But I can say that the 1.8uF Miflex capacitor used in the MFC version versus a ULD version with say Jantzen cap instead, that the MFC would in my opinion be better. The MFC is really very good indeed.
Alright. I am working on the NRX version of the Elsinore's as we speak. I will put the Miflex caps on the list. Especially since they are in the ULD as well. Thanks!
A couple questions.
What thickness of plywood/mdf is to be used? Also I see what looks like a back stiffening panel.
also, what stuffing is to be used in it?
These are two things that present issues in the USA. 3/4" wood is standard and polywool batting is hard to get.
I agree, it looks like a nice design! The driver placement is a lot closer which aesthetically is really nice.
It's all 18mm MDF (plywood with at least the same density can be used) and if suitable adjustments are made, 3/4" could be used.
Yes, 3/4 is 19mm and it looks like your ply is 18mm. The only thing that would have to be adjusted is the side panel by 2mm. For the volume displaced by the vertical panels going front to back, I believe we are looking at 5mm difference total between 19mm and 18mm. However, with most of the panels being fairly open (brace, driver cutouts etc... I doesn't seem like a big deal.
So the speakers would be 2mm wider (due to the thickness of the side panels), 2mm taller (same) and if you really wanted to compensate for the extra mm, then 5mm deeper. Although that probably isn't a big deal. Very nice! A USA friendly design!
Last question... Sorry 😬 how does the imaging compare to the Elsinore speakers being that these are a stand mount design?
So the speakers would be 2mm wider (due to the thickness of the side panels), 2mm taller (same) and if you really wanted to compensate for the extra mm, then 5mm deeper. Although that probably isn't a big deal. Very nice! A USA friendly design!
Last question... Sorry 😬 how does the imaging compare to the Elsinore speakers being that these are a stand mount design?
Yes. Eves so, the slight volume change is so small as to not be an issue. And yes, you will not find the imaging to be lacking. I have been saying for some time that they key to getting the sound out of the box is getting the current right. I hope that view will eventually get out that, that the acoustic side of the loudspeaker is only one thing to get right, that the electrical side has a huge bearing on box-less sound.
I agree. Very nice. I have read through a lot of your thoughts on the current interaction between speakers and amplifiers and find it very interesting. That is one of the main reasons that I am building your Elsinore speakers. Having built many amplifiers, I can compare how they interact between the Elsinore speakers and my current Bordeaux (Speaker Design Works).
There are two reasons that I am asking these questions. One, I am considering the idea of a two way stand mount speaker to compare in regards to how they interact with the room. But more importantly, I think solving these problems for the US market will help the Hamlets sell better. The only thing really outstanding is the polyester foam batting. That material is not available in the US. I am considering two options. One, polyester stuffing or new fiberglass insulation. New fiberglass is not itchy for lungs and skin compared to the old stuff. Actually, from my experience, it is more pleasant to work with than Rockwool... For the 25mm polyester, I believe I can get that no problem.
There are two reasons that I am asking these questions. One, I am considering the idea of a two way stand mount speaker to compare in regards to how they interact with the room. But more importantly, I think solving these problems for the US market will help the Hamlets sell better. The only thing really outstanding is the polyester foam batting. That material is not available in the US. I am considering two options. One, polyester stuffing or new fiberglass insulation. New fiberglass is not itchy for lungs and skin compared to the old stuff. Actually, from my experience, it is more pleasant to work with than Rockwool... For the 25mm polyester, I believe I can get that no problem.
Re filling, not everybody has access to the polyester fibres that I can get here in Australia, but others have still managed the way you describe and gotten good results and follow the instructions re where and what areas to fill and line the sides and top in front of the main brace. Behind the main brace use fill above the port. Make sure the fill is not too dense. You will get there.
I managed to cobble some polyester stuffing yesterday out of an old couch... I swear I am not normally that that guy... But I saw an opportunity... I saw a treasure and her name was lazyboy.
I am thinking filling the areas between the braces and then stapling 25mm polyester in front of it should be the ticket.
I am thinking filling the areas between the braces and then stapling 25mm polyester in front of it should be the ticket.