Search found 2357 matches

by chris661
Wed Jul 15, 2020 9:48 am
Forum: Beginners
Topic: Long interconnects.
Replies: 11
Views: 245

Re: Long interconnects.

when we're talking milli-volts over (potentially) a couple of hundred metres of cable. I would have thought most microphones were powered now. Powered as in condenser mics, or a dynamic mic with a buffer stage running on the +48v feed? Passive dynamic mics still rule live stages, since they're rugg...
by chris661
Tue Jul 14, 2020 11:15 am
Forum: Beginners
Topic: Long interconnects.
Replies: 11
Views: 245

Re: Long interconnects.

Probably too late but I've had great success (or at least I think so) with instrument cable from Rapid Evolution XPC 301-011 20M Professional Instrument Cable Black 20m | Rapid Online Though it's probably very similar to the above. I soldered gold plated phono plugs to the ends, quite fiddly to do ...
by chris661
Mon Jul 13, 2020 3:55 pm
Forum: Assorted Stuff
Topic: The Owston that never was..
Replies: 31
Views: 936

Re: The Owston that never was..

Yep, there's a description of a few different stereo pickup techniques there, ranging from a Jecklin disc to Blumlein stereo, to mid-side using fig-8s for both. Some of those techniques are coincident, but not all of them. The XY arrangement of mics you've mentioned, by design, cannot pick up phase ...
by chris661
Mon Jul 13, 2020 11:31 am
Forum: Assorted Stuff
Topic: The Owston that never was..
Replies: 31
Views: 936

Re: The Owston that never was..

Well, the drum (or drum kit as a whole) will be behaving as a complex number of sound sources each of which will generate a wave front that expands into the recording studio. The microphone will sample that wave at a distance from the source and record the pressure variation at that point. So I gue...
by chris661
Mon Jul 13, 2020 8:46 am
Forum: Assorted Stuff
Topic: The Owston that never was..
Replies: 31
Views: 936

Re: The Owston that never was..

Well, I'd be happy to answer any questions that might come up. I don't think there's anything technically difficult or weird that might apply, so no secrecy here. I was thinking more like 8 channels and a subwoofer, though. Four seems a little pedestrian. Question for the audience: in the case of a ...
by chris661
Sun Jul 12, 2020 6:41 pm
Forum: Assorted Stuff
Topic: The Owston that never was..
Replies: 31
Views: 936

Re: The Owston that never was..

Good info, Paul. Thanks. I've had a thought: there's something I'd like to try at Owston. It'd be a bit of work to set up, and would probably require quite a bit of space to pull off properly - maybe an end wall. The idea is this: set off with a live multi-track recording and, instead of mixing it d...
by chris661
Sat Jul 11, 2020 11:51 am
Forum: Assorted Stuff
Topic: The Owston that never was..
Replies: 31
Views: 936

Re: The Owston that never was..

One of my favourite Owston memories was watching Nick and a few others assemble a working 833A SET from parts that had never seen each other before. Getting that thing up and running required a few smart minds and brave hands (the HT ended up at 2KV, IIRC, so someone put a turntable dust cover over ...
by chris661
Sun Jun 28, 2020 9:39 pm
Forum: Speakers
Topic: Fane 12-250TC Retro Speaker.
Replies: 306
Views: 60135

Re: Fane 12-250TC Retro Speaker.

Just trying to wrap my head around it. If you took a pair of cabinets, put a driver in one and a tube between the two, and then shoved a load of polyfill into the tube and empty cabinets, I can see the following occurring: - At mid-high frequencies, the driver will only see the cabinet, with a black...
by chris661
Tue Jun 16, 2020 2:37 pm
Forum: Assorted Stuff
Topic: FIR And FIlter Stuff
Replies: 21
Views: 796

Re: FIR And FIlter Stuff

The HF filter is what happens when you get towards Nyquist - the article I linked goes into detail on that, and more.

Super-tweeters are often high-efficiency devices implemented with a single cap - they'll be adding non-trivial SPLs well into the audible frequency range.

Chris
by chris661
Mon Jun 15, 2020 10:07 pm
Forum: Assorted Stuff
Topic: FIR And FIlter Stuff
Replies: 21
Views: 796

Re: FIR And FIlter Stuff

Cool, someone's trying it. Well, you can tell RePhase to make a linear impulse. It'll just be an impulse signal. Here's a rather good article on digital signal theory: https://web.archive.org/web/20200426194438/http://people.xiph.org/~xiphmont/demo/neil-young.html Worth watching the video linked at ...
by chris661
Sat Jun 13, 2020 12:41 pm
Forum: Speakers
Topic: PERSPEX QUASAR ver 2.0 prototype build
Replies: 69
Views: 1939

Re: PERSPEX QUASAR ver 2.0 prototype build

Comparing datasheets (I know, not the full story) but the Faital 8HX230 has demodulating rings (lowers motor-borne distortion and lowers VC inductance) while the Monacor's HF driver has a fairly large dip 7-9kHz. The Faital unit is one of their latest and greatest, and is priced accordingly, but sti...
by chris661
Sat Jun 13, 2020 12:47 am
Forum: Speakers
Topic: PERSPEX QUASAR ver 2.0 prototype build
Replies: 69
Views: 1939

Re: PERSPEX QUASAR ver 2.0 prototype build

Another option for the full range driver was suggested by Scott, Lowther pm6a wilver would. What does the panel think? https://lowtherloudspeakers.com/wp-content/uploads/pdf/pm6a.pdf If I was looking for something to cover a couple of hundred Hz upwards, I'd be looking seriously at small-ish PA coa...
by chris661
Thu Jun 11, 2020 12:46 pm
Forum: Assorted Stuff
Topic: Lock Down's Effect on the Audio Systems Replay Environment
Replies: 27
Views: 634

Re: Lock Down's Effect on the Audio Systems Replay Environment

Just looks like a higher mains frequency to me. Something that would be easier to try would be to use a reasonably large solid-state amplifier connected to a step-up transformer. Should put mains THD down to basically zero, although I do wonder how an amp would react to the short-term large current ...
by chris661
Thu Jun 11, 2020 8:24 am
Forum: Speakers
Topic: Damping Factor Article
Replies: 6
Views: 343

Re: Damping Factor Article

IslandPink wrote:
Wed Jun 10, 2020 10:37 am
this just adds to the Qes of the speaker parameters.
True, but there are effects outside of the Thiele-Small range, which I think this article covers fairly well.
I think we should give the writer more credit - it's a much better piece of work than most HiFi manufacturers would put out.

Chris
by chris661
Wed Jun 10, 2020 9:44 am
Forum: Speakers
Topic: Damping Factor Article
Replies: 6
Views: 343

Re: Damping Factor Article

Good to see someone run the numbers. I do recall some people saying that a Zobel filter robs the speaker of "life", and I'm wondering if that's because there would be less output in the high frequencies due to the driver's rising impedance being flattened. A few dB here and there can make quite the ...