Search found 461 matches

by rowuk
Sat Nov 16, 2024 7:54 pm
Forum: Speakers
Topic: Super Tweeters
Replies: 9
Views: 6665

Re: Super Tweeters

My experience is that I do not "hear" the super tweeter when doing a frequency sweep. I just hear what it does to instruments like trumpet, percussion, violins, piano, oboe. Those instruments have an appreciable portion of "articulation" to get the individual notes started and the general "close ...
by rowuk
Fri Oct 04, 2024 7:11 pm
Forum: Assorted Stuff
Topic: Hearing aids
Replies: 14
Views: 18072

Re: Hearing aids

I think that this is worth looking at. Setup AirPods for hearing assistance and/or music all in one device.

https://www.soundly.com/blog/airpods-as-hearing-aids

https://www.apple.com/newsroom/2024/09/ ... ods-pro-2/
by rowuk
Thu Sep 26, 2024 5:12 pm
Forum: Beginners
Topic: Valve Headphone Amp
Replies: 52
Views: 52272

Re: Valve Headphone Amp


Why would this be different than just using the weather stripping and leaving the transformer bolted to the bottom

Just guessing, the bottom of the box may be more rigid than the top as its supported by the sides and corners, also attaching the transformer to the top will increase the moving ...
by rowuk
Wed Sep 25, 2024 6:53 pm
Forum: Beginners
Topic: Valve Headphone Amp
Replies: 52
Views: 52272

Re: Valve Headphone Amp

Bolt the transformer to the lid instead of the base with rubber grommets or O-rings between them and the lid for damping. Screw the lid then to the rest of the box with some weather stripping on the edges to insulate/isolate.
by rowuk
Tue Sep 10, 2024 6:51 pm
Forum: Everyones Projects
Topic: Valve PHONO Preamp
Replies: 10
Views: 11873

Re: Valve PHONO Preamp


Hi Rowuk, can you point us to which 834P clone (for MC I hope) you built?
Thanks
Adrian


it was this one:
https://www.ebay.de/itm/275297430526?_trkparms=amclksrc%3DITM%26aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20231107084023%26meid%3Da00620c8b7bc4bbea5cf1d7d28805df7%26pid%3D101875 ...
by rowuk
Sat Jul 27, 2024 5:19 pm
Forum: Everyones Projects
Topic: Valve PHONO Preamp
Replies: 10
Views: 11873

Re: Valve PHONO Preamp

Several things come to mind - especially the valve kits available on eBay. I have an original EAR 834 phono preamp and also built one of the clones. The clone is as good! I also see some Audio Research clones. If you want to just build something with point to point wiring, the Dynaco PAS2/3 had a 2 ...
by rowuk
Thu Jun 20, 2024 4:58 pm
Forum: Speakers
Topic: What to do when you’re speakers are 4 ohm.
Replies: 52
Views: 40755

Re: What to do when you’re speakers are 4 ohm.

I would offer to use parallel output tubes. That would reduce primary/secondary by half.
by rowuk
Mon Apr 01, 2024 10:43 am
Forum: Everyones Projects
Topic: GM70 Monoblocks’
Replies: 107
Views: 55082

Re: GM70 Monoblocks’

When I see builds like this, it reminds me of the late 1970s and early 1980s with those magnificent huge receivers from Kenwood, Pioneer and Sansui. They were not just big boxes, they were full.
s-l1600.jpg
My opinion is that a "magnificent" build like this should also get a big, statement box so ...
by rowuk
Wed Feb 21, 2024 6:28 pm
Forum: Speakers
Topic: TG "The Loudspeaker" Build (Sort of)
Replies: 233
Views: 145496

Re: TG "The Loudspeaker" Build (Sort of)

I also use the HF146 that worked fine at 300 Hz with a 66cmTractrix horn. In the mean time I replaced the "large" roundover with a wooden ring (horn now 55cm) and now cross over at 450 Hz with phenomenal results. This driver is a keeper and 300 Hz was no problem - even with the distortion curves. A ...
by rowuk
Tue Dec 12, 2023 3:20 pm
Forum: Computer Audio
Topic: Anti-virus for mac
Replies: 1
Views: 9439

Re: Anti-virus for mac

I use Malwarebytes.

I would only be careful of russian (Kaspersky), chinese (don't know of any) or Elon Musk connected software.

MacKeeper behaves in ways that I do not tolerate.
by rowuk
Tue Dec 12, 2023 3:18 pm
Forum: Assorted Stuff
Topic: The cloud.
Replies: 55
Views: 60725

Re: The cloud.

I often why Daniel is so abrasive - maybe just because he can? I also question what difference a contract makes when considering a cloud space to be someone elses computer. In my world it is none. It is still someone elses compiuter (or space running on maybe even a third parties computer - also ...
by rowuk
Sun Dec 03, 2023 10:47 am
Forum: Assorted Stuff
Topic: The cloud.
Replies: 55
Views: 60725

Re: The cloud.

Regardless of the details, as Nick stated, the cloud is just someone elses computer at the other end of an IP pipe. That means that they ultimately call the shots about everything that happens with that remote computer - regardless whether it is access to a service, a platform or infrastructure.

I ...
by rowuk
Sun Oct 29, 2023 12:25 pm
Forum: Solid State
Topic: Hooking up Subwoofer with Class D amplifier
Replies: 6
Views: 17755

Re: Hooking up Subwoofer with Class D amplifier

I would say, just try it. If it hums, you know that there is a ground loop to deal with. If not - proceed to the enjoyment stage.

What we do not know: is this for your home audio, or for PA purposes.

I often wonder why symmetrical connections (other than transformer coupling) are of any interest ...
by rowuk
Fri Oct 27, 2023 9:20 pm
Forum: Speakers
Topic: Quite possibly my last speakers
Replies: 43
Views: 38085

Re: Quite possibly my last speakers

And now the tweeters
Thanks to John Carlson and his Karlson Couplers
Robin Tweeter.jpg
Robin Tweeter.jpg (85.83 KiB) Viewed 15030 times
Beyma CD-1ND drivers
by rowuk
Sun Sep 10, 2023 5:39 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 123064

Re: Purifi-based monitor - options


In actual use, Jon will likely be around 2m from the speakers, and approx 3" down from the tweeter axis. So, I did another final measurement to represent that. I think this one used 1/6th-octave smoothing , bearing in mind that was just one measurement. As you can see, the slight rise to 10kHz has ...