Marvel Posted April 22, 2021 Share Posted April 22, 2021 The John Linsley-Hood amps should work fine for the top end. I have a pair I bought a couple years ago, but still have them wrapped up. As simple as the are, I still need to build a power supply and really fivure out how to connect everything. Mine are supposed to be the 1969 version. 1 Quote Link to comment Share on other sites More sharing options...
NBPK402 Posted April 22, 2021 Share Posted April 22, 2021 Here is some info on the AmpCamp amps...I will be using them for my compression drivers for serious enjoyment. https://www.passdiy.com/project/amplifiers/the-plh-amplifier Sent from my SM-T830 using Tapatalk 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted April 22, 2021 Share Posted April 22, 2021 I've been through over a dozen sites with info, but the boards I got had zero documentation. I need to dig them out and start over with them. Quote Link to comment Share on other sites More sharing options...
Marvel Posted April 22, 2021 Share Posted April 22, 2021 . DP Quote Link to comment Share on other sites More sharing options...
StabMe Posted April 22, 2021 Author Share Posted April 22, 2021 I discovered that JLH amp realization can be bought here at an affordable price. Small local company produces them here. I can be sure that it is made of quality parts and indeed pure Class A. With Chinese versions this is a lottery. I remember Chris was writing about appropriate type of amps for horns, but it is too complicated for me to understand if JLH fits the requirement. Quote Link to comment Share on other sites More sharing options...
VDS Posted April 26, 2021 Share Posted April 26, 2021 @StabMe, speakers look great, well done! Can you show a pic or explain how you built the transition from compression driver to horn? That seems tricky, going from straight sides, ending in a rectangle, them transitioning to 2” round hole. thanks for sharing! Ted 1 Quote Link to comment Share on other sites More sharing options...
Supersteff Posted May 1, 2021 Share Posted May 1, 2021 Hi StabMe If you live in Europa, you could also take a look at the following amps from Andre Buscher in germany. https://www.buscher-endstufen.de/produkte/ That are single-ended mosfet amplifiers inspired/or a bit like Nelson Pass´s Aleph 0. They seem to be very simple to operate. Regards from Denmark Steffen Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted June 4, 2021 Share Posted June 4, 2021 On 4/16/2021 at 1:53 AM, StabMe said: Hey! The project is moving, albeit somewhat slowly. The guy at the carpentry is now gluing the parts together. Brought loudspeakers to him yesterday so that he can he if they fit nicely and do amendments if necessary. Some pics: Nice work! Quote Link to comment Share on other sites More sharing options...
StabMe Posted July 11, 2021 Author Share Posted July 11, 2021 The project is moving very slowly, as i stated earlier in this topic. Managed to paint and polish all the parts of the first speaker. Here is how the horn part looks: Preparing the horn for painting took a lot of time. The second speaker is still in the making. The guy who works on it promises to have it ready in a week or two. Can't wait to give them a listen! Oh, and i bought a locally made clone of the JLH amp which will be used for HF duties. 6 2 Quote Link to comment Share on other sites More sharing options...
parlophone1 Posted July 12, 2021 Share Posted July 12, 2021 Looking very nice. What was the workflow regarding the preparation for painting and the painting? Quote Link to comment Share on other sites More sharing options...
soundbound Posted July 12, 2021 Share Posted July 12, 2021 Beautiful job! Quote Link to comment Share on other sites More sharing options...
Josh Ricci Posted July 14, 2021 Share Posted July 14, 2021 Excellent job! Subscribed. Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted July 15, 2021 Share Posted July 15, 2021 You are making awesome progress. Your paint job looks good. That horn is built solid, it is going to sound great. Quote Link to comment Share on other sites More sharing options...
StabMe Posted September 14, 2021 Author Share Posted September 14, 2021 On 7/12/2021 at 8:54 AM, parlophone1 said: Looking very nice. What was the workflow regarding the preparation for painting and the painting? Frankly, i don't even know what process the guy is using. Based on what he said, basically the workflow if as follows: prime the part to be painted, see if anything sticks out, polish 'bad' regions, prime again and if nothing comes up the part is painted. On 7/15/2021 at 8:22 AM, Khornukopia said: You are making awesome progress. Your paint job looks good. That horn is built solid, it is going to sound great. Just can't wait to hear it! I decided to strengthen the box walls as in the pics: 1 Quote Link to comment Share on other sites More sharing options...
StabMe Posted September 14, 2021 Author Share Posted September 14, 2021 (edited) Since the room i am planning to place the MEHs in is kinda big and has very little furniture in it, i was thinkiong about placing diffusers on the walls. As of now, the room is very echoey. I already have 6 Leanfusers prebuilt and i was contemplating on making 4 more. Here is how i am going to place them: The room is about 6 meters wide and 12 meters long. Ceiling height is about 3.1 meters. Listening position is about 3.5 meters from the front wall. I was also thinking about placing filling a 3x3 meters space on the ceiling that is between listening position and front wall with 2D 60x60cm diffusers in a chess fashion. To make them lighter weight, i was thinking about making them out of XPS of maximum density i could find. Of course, i will put a carpet on the floor. What do you think? This is what can be done relatively easy. Should i expect some nice results? Edited September 14, 2021 by StabMe 1 Quote Link to comment Share on other sites More sharing options...
Khornukopia Posted September 14, 2021 Share Posted September 14, 2021 3 hours ago, StabMe said: I was also thinking about placing filling a 3x3 meters space on the ceiling that is between listening position and front wall with 2D 60x60cm diffusers in a chess fashion. To make them lighter weight, i was thinking about making them out of XPS of maximum density i could find. Regular acoustic ceiling tiles would perform better than XPS foam. Quote Link to comment Share on other sites More sharing options...
StabMe Posted September 15, 2021 Author Share Posted September 15, 2021 18 hours ago, Khornukopia said: Regular acoustic ceiling tiles would perform better than XPS foam. Oh, i meant making a 2D diffuser out of high density XPS rather than out of wood. A variation of this kind of diffuser: 1 Quote Link to comment Share on other sites More sharing options...
Marvel Posted September 15, 2021 Share Posted September 15, 2021 27 minutes ago, StabMe said: Oh, i meant making a 2D diffuser out of high density XPS rather than out of wood. A variation of this kind of diffuser: It would certainly be a lot lighter than ones made from wood. 1 Quote Link to comment Share on other sites More sharing options...
StabMe Posted September 15, 2021 Author Share Posted September 15, 2021 14 minutes ago, Marvel said: It would certainly be a lot lighter than ones made from wood. Definitely! The question remains, though - which density of XPS is enough to effectively work as a diffuser? Some say that 40Kg/M density will suffice, but i haven't seen proofs. Quote Link to comment Share on other sites More sharing options...
Marvel Posted September 15, 2021 Share Posted September 15, 2021 It's a diffuser, and doesn't need to be acoustic foam. They make them out of polystyrene, too. They can be smooth and painted, or whatever. The wood always looks cool, but weighs too much. I looked at aircraft balsa, but it was going to be too expensive. Did you use QRDude to calculate the design for the frequencies you wanted to diffuse? 1 Quote Link to comment Share on other sites More sharing options...
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