I remember the book "Zen and the art of motorcycle maintenance", which espoused the philosophy that to learn about life you need to fully master one thing. My obsession with audio has taught how you can see all the human behavioural traits and belief systems as expressed by audiophiles.
Another option to replacing the heatsink, is to just put a copper plate between the device and the heatsink, so that the regulator is contacting with copper and not aluminum. Then use a brass screw. The reasoning behind this is the removal of eddie current in the heatsink.
I don't know of any direct commercial available replacement in copper. I make my own from copper sheet squares like these .
You don't need that much metal to act as a heatsink, so I use 3 plates, the middle one flat and the outer ones bent out to the sides for airflow...
Wow Ayreman, you don't hold back!
I agree with you that you can only get to the best by starting with a really good circuit and then carefully selecting the best components.
Your pre could never be sold commercially, because of the 20x markup ratio on top of those insane parts.
By the way, I...
LOL, it's surprising to hear a tube guy say that there is no benefit!
I will definitely try a bigger gauge - I have been running 18awg.
Sounds good. What voltage range will it have, and how much current?
Am I understanding you correctly that the Tungar PS is unregulated, or that once you regulate it, the fact that it is Tungar makes no difference?
Your comments on the cables are interesting. What king of gauge do you think is necessary?
I am interested to know more about your power supply design.
I only have experience of the 100 and the 50 and 20, both passive and active. These were available to the pro and consumer markets. The pro version had a different finish with a rounded baffle and no grill. If memory serves me right, the pro price was cheaper . I personally preferred...
I used to work with ATC monitors 20 years ago. I always thought that they were the best (most neutral/natural) sounding of all the pro monitors I heard.
The differences between the pro and consumer ATCs were always cosmetic - doubt that has changed.
Your bass drivers are essentially the same as mine, although you have 2 per side and running ported so you have way more efficiency!
I would humbly suggest that you experiment with the power supplies for the drivers. On my bass driver I started with a 20V 5A rated unit (the...
lovely Ralph, are yours the Hartsfields or the T series?
What are you using to power the motors?
No argument from me on everything you have said!
I always felt that ferrite magnet speakers sounded somewhat grey and dead compared to alnico.
field coils seam to sound even more alive, and I am...
I think the K145 might go a bit lower, but not by much. As I am running mine sealed, I really sacrifice some efficiency to get bass down to 35hz. Don't really want to run subs, as I feel the down sides outweigh the benefits.
26hz sounds fine to me, especially if you are getting efficiency and...
I would love to hear those Hartsfields!
it is the emotional side that drives my choice. I selected the t35 tweeter because I could not stop listening to it. The matching Seas midwoofer left me cold. The Supravox again had me hooked.
I am not a fan of most hi end audio, which tends to focus on...
Wolf Von Langa did some 604 field coils. There was a pair on ebay about 5 years ago for a pittance. I was tempted to buy them.
The Rullits with the whizzer obviously go a lot higher up than the Supravoxs, which I need to cross over at 6K. This is actually a lot easier than the bass, which is...
Thanks for your reply. I love the pics. I like the way they have used solid timber for the speaker baffle. I also love the look of your roo, it looks big and really solid.
It is interesting that the Supravox bass units pull 5A at 12-14V, my bass units only pull 1.5A at 12V.
Thanks for your kind comment.
They are not much to look at, but I am hoping to improve the asthetics when I get them sounding good.
The K145s were the predecessor of the E145. They don't go super low, but are very punchy.
Being able to vary the BL and Q is very handy as part of the...
I think you are right that field coils are not necessarily better, but have the potential to be so.
Many years ago I owned Alon V mk2 speakers which had Alnico open baffle mids with a sealed tweeter and bass. I later upgraded to the Circes which were basically the same but everything...
Thanks for the information on your speakers Jay! The photos look great, but I would love to see some shots from a distance.
I love your approach - not mainstream!
A few questions:
how many powers supplies do you have, and are they all the same?
did you compare different power supplies.
I thought with open baffle, speed and articulation would be things that you want to focus on.
The Rullit drivers always look beautifully engineered, but I have yet to hear a pair.
Can you post some pictures of your setup?
I am intrigued by your custom power supplies. I am just...
I don't know of anyone that has one. I did enquire about buying some, but plan to build my own. A friend picked up a box of NOS tungars for $5
Thanks, I will have a look at that.
Wolf made quite a few different drivers back in 2010. I think he stopped making the JBLs due to the...
I am not answering your question, but would suggest you say what is important to you in the bass. Is it weight, slam, speed, articulation, tonality, etc.
By the way, what are your other drivers?
I just posted a thread on my field coil speakers
I think when listening to live (unamplified) music in a room or concert hall, much of it comes to us as diffuse reflections. When we try to reproduce music via a stereo in another room, we try to minimize or control the reflections in our room so that we can hear the room reflections in...
9 years ago, I started a speaker project that, for various reasons, never got finished.
If anyone is interested, I started a thread on the Hifi Critic forum here.
Anyway due to being in a complete lockdown in Melbourne, Australia, I decided to use the time to complete these.
Please don't get me wrong, I am not arguing against imaging.
The great early recordings were made without the engineers focusing on something that their replay systems may not have produced, yet to my mind, many of those early recordings provide the most realistic recreation of the event...
Yes, Wolf called them the A150, after the JBL 150 in the Hartsfield. They were made with NOS JBL K145 cones which had the same cone shape but with nomex formers.
I am going to put up a thread in the DIY section on these, as I am in the final stages of the build.