Search found 266 matches

by rowuk
Mon Aug 19, 2019 9:25 pm
Forum: Speakers
Topic: Fane 12-250TC Retro Speaker.
Replies: 284
Views: 32345

Re: Fane 12-250TC Retro Speaker.

https://www.diyaudio.com/forums/multi-w ... genumber=1

Here Bud Purvine talks about a simple treatment of the cone to dramatically improve the sound quality. It represents a zero liability approach.
by rowuk
Wed Aug 07, 2019 6:44 pm
Forum: General Vinyl
Topic: Direct Drive - any advantage to coreless motors?
Replies: 11
Views: 561

Re: Direct Drive - any advantage to coreless motors?

IP, yes, but with each of those changes in technology EVERYTHING else changed at the same time. Could it just be that those with "weak" belt drives have plinth or mechanical grounding issues? Could it be that there is a critical platter mass for a given motor/drive system and that the manufacturers ...
by rowuk
Wed Aug 07, 2019 5:35 pm
Forum: General Vinyl
Topic: Direct Drive - any advantage to coreless motors?
Replies: 11
Views: 561

Re: Direct Drive - any advantage to coreless motors?

I think that most people that really listen would be at odds to say what the sonic contribution of a specific technology is. The problem is figuring out how much is the plinth, mechanical grounding, weight and damping of the platter and then maybe finally the motor. My experience is that the motor h...
by rowuk
Sat Aug 03, 2019 3:31 pm
Forum: Assorted Stuff
Topic: Room Treatment (Split from Owston thread)
Replies: 31
Views: 2733

Re: Room Treatment (Split from Owston thread)

If someone has a floor plan, we can calculate the standing waves and maybe get some idea about what is going on - before someone actually gets a chance to measure. http://www.sengpielaudio.com/calculator-roommodes.htm I like Nicks "drive the room" analogy. My experience is that there are positions w...
by rowuk
Sat Aug 03, 2019 3:10 pm
Forum: Beginners
Topic: Super capacitors
Replies: 34
Views: 4385

Re: Super capacitors

My best results are with LC power supplies. Then smaller caps can sound really like...NOTHING.

The smallest sonic footprint of any power supply that I have built has been this way.
by rowuk
Tue Jul 16, 2019 9:03 pm
Forum: Speakers
Topic: ariels
Replies: 8
Views: 1353

Re: ariels

There is a very compelling thread at DIY Audio on "Beyond the Ariels"...
by rowuk
Wed Jun 05, 2019 9:27 pm
Forum: Everyones Projects
Topic: DHT Heater using VCCS - PCB or Kit (Possible Group buy)
Replies: 1097
Views: 108868

Re: DHT Heater using VCCS - PCB or Kit (Possible Group buy)

At least the car batteries would not hum!
by rowuk
Wed May 01, 2019 6:32 pm
Forum: Valves
Topic: OH YES
Replies: 14
Views: 1834

Re: OH YES

Maybe the problem is not the price, rather the units ability to fulfill expectations. Because we do not even have words to describe what a "superior" playback should have, pricey things like this are an easy target. Sometimes we pay more for the idea than the technology to build it. I think most mem...
by rowuk
Fri Apr 19, 2019 8:40 pm
Forum: Speakers
Topic: Ferrite Versus Alnico
Replies: 5
Views: 811

Re: Ferrite Versus Alnico

Building a driver for 30 Watts allows for a much different voice coil and cone material/geometry. Maybe the increased tone comes from from not having to handle 1000watts?
by rowuk
Sun Mar 17, 2019 9:41 am
Forum: Headphones
Topic: House sound?
Replies: 8
Views: 4223

Re: House sound?

I compared all of these and ended up with the AKGs. My sound engineer son ended up with Beyer, an audiophile friend ended up with Grado. The explanation is easy. The problem is that the geometry of our head and ears is unique and that means that the cans are not all pointing in the same direction. D...
by rowuk
Sun Mar 17, 2019 9:30 am
Forum: Computer Audio
Topic: Digital.
Replies: 55
Views: 5073

Re: Digital.

2011 MacMini, BitPerfect, Focusrite Forte ADC/DAC, separate “analog” USB Powersupply. It could just be me, but Focusrite seems to have a magic hand on ADC/DAC transformation. For onsite recording I started with their Saffire range and now have tried many different models. Nothing ever appears that m...
by rowuk
Sun Mar 10, 2019 11:40 am
Forum: Speakers
Topic: 3D Print
Replies: 4
Views: 704

Re: 3D Print

I am using a Faital HF146. The horn is similar to the Fane but not baffle mounted. Everything is acoustically time aligned with low order crossovers.
by rowuk
Mon Mar 04, 2019 5:44 pm
Forum: Speakers
Topic: 3D Print
Replies: 4
Views: 704

Re: 3D Print

Actually my concept has not changed for over 30 years: don't change anything unless you can describe what is wrong and why a change would fix it. I have tried for several years to integrate the magnetostat tweeters and have given up. They remain conspicuous. So I have a defined issue and the opportu...
by rowuk
Sun Mar 03, 2019 5:13 pm
Forum: Speakers
Topic: 3D Print
Replies: 4
Views: 704

3D Print

I bought a 3d printer as a Christmas gift to myself and have been busy making trumpet and cornett mouthpieces. Now my playback has its turn. I have printed a couple of 3Khz horns for my compression drivers. I will crossover somewhere above 5K. The left is tractrix and the right is spherical. They ar...
by rowuk
Sun Mar 03, 2019 4:37 pm
Forum: Speakers
Topic: Speaker Motors
Replies: 29
Views: 2537

Re: Speaker Motors

It would be interesting to see/hear if the LCR equivalent of that speaker would provide similar results (without compression effects due to the voice coil getting hot).