Search found 2552 matches

by chris661
Sun Oct 16, 2022 4:58 pm
Forum: Assorted Stuff
Topic: Owston 2022 - What're you bringing?
Replies: 56
Views: 13851

Re: Owston 2022 - What're you bringing?

Just a thought - I have a reasonably nice headphone setup:
Shure SRH1540s driven by a Motu M4. I can leave a laptop connected up, so just bring your music on a USB stick.

Anyone fancy it?

Chris
by chris661
Sun Oct 16, 2022 10:55 am
Forum: Assorted Stuff
Topic: Owston meet, Doncaster, 22&23 Oct 22
Replies: 171
Views: 40339

Re: Owston meet, Doncaster, 22&23 Oct 22

Hi Steve,

My +1 isn't well enough to make it, so it'll be just me. Happy to pay for the +1 as well since it's short notice.

Chris
by chris661
Sat Oct 15, 2022 9:24 am
Forum: Speakers
Topic: Another speaker thread
Replies: 254
Views: 158076

Re: Another speaker thread

Just a quick note that you really shouldn't be getting feedback, and that might be throwing all of your measurements out. I can't remember which USB audio interface you're using, but anything like "monitor" or "direct monitor" should be off. That switch feeds the inputs straight ...
by chris661
Sat Oct 08, 2022 10:27 am
Forum: Assorted Stuff
Topic: Owston 2022 - What're you bringing?
Replies: 56
Views: 13851

Re: Owston 2022 - What're you bringing?

You're welcome to borrow additional power. I'll be bringing a couple of multi-kilowatt amps.

I'll also be bringing a couple of very capable subwoofers. If you'd rather save the Supravox drivers from high power inputs, we can run my subs for the really low stuff.

Chris
by chris661
Thu Oct 06, 2022 4:34 pm
Forum: Speakers
Topic: Another speaker thread
Replies: 254
Views: 158076

Re: Another speaker thread

Thoughts: - Good start overall. <20Hz LF extension is always nice to have. - The raised 3.5kHz-8kHz region is probably responsible for the extra detail. Suspect the novelty will wear off on that. - Odd that you seem to have lost some level >12kHz when everything's combined. I'll have a bit of a pond...
by chris661
Thu Oct 06, 2022 4:22 pm
Forum: Assorted Stuff
Topic: Laptops with SSD
Replies: 31
Views: 8850

Re: Laptops with SSD

Good move. Crucial has some software (Acronis?) which can be used to clone drives. Follow the steps and you'll be fine.


Chris
by chris661
Sun Sep 18, 2022 11:48 am
Forum: Assorted Stuff
Topic: Owston meet, Doncaster, 22&23 Oct 22
Replies: 171
Views: 40339

Re: Owston meet, Doncaster, 22&23 Oct 22

I'll be bringing a +1, Steve.

Looking forward to it!

Chris
by chris661
Thu Sep 15, 2022 4:16 pm
Forum: Speakers
Topic: Vitruix
Replies: 10
Views: 5297

Re: Vitruix

Scott, The Dutch & Dutch 8C has an 8" midrange unit which is a passive cardioid. They use vents towards the rear of the cabinet, which are combined with internal absorption to get a reasonable impression of a cardioid polar pattern in a range where rear-wall reflections are problematic. IMO...
by chris661
Mon Aug 29, 2022 12:21 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63483

Re: Purifi-based monitor - options

Yes. Which means the harmonics will disappear. The cone won't produce harmonics on its own - it needs to be excited at the right frequency by the voice coil. If the voice coil can't pass current at the relevant frequency, there'll be no output, regardless of how the voice coil current is being excit...
by chris661
Sun Aug 28, 2022 10:36 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63483

Re: Purifi-based monitor - options

This to me seems to be putting the cart at least three steps in front of the horse, and what I don't understand is what of any effect it will have on the generation of the harmonic by the actual resonance of the cone itself. But I guess if we are saying this is at the point where the cone behaves l...
by chris661
Fri Aug 26, 2022 3:37 pm
Forum: Assorted Stuff
Topic: Owston 2022 - What're you bringing?
Replies: 56
Views: 13851

Re: Owston 2022 - What're you bringing?

Oh, I thought that was the tendency of HiFi manufacturers to use dome tweeters.

Chris
by chris661
Tue Aug 09, 2022 6:31 pm
Forum: Assorted Stuff
Topic: Owston 2022 - What're you bringing?
Replies: 56
Views: 13851

Owston 2022 - What're you bringing?

Per the title :) I'll start: - 2.5-way speakers that made an appearance last year, but with updated tweeters & crossovers. - Crown MA5002VZ amp, which I'm happy to lend out for if anyone needs more power - MOTU M4 USB audio interface/DAC - Laptop as source - Maybe a surprise If anyone wants acou...
by chris661
Mon Aug 08, 2022 8:17 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63483

Re: Purifi-based monitor - options

Nice to see it's not me going around in these circles. Intuitively, the "apply a short-circuit to give maximum electro-magnetic braking" makes sense. However, I can sort-of see the argument for preventing current flow in the motor at the breakup frequency. That way, the motor can't produce...
by chris661
Fri Aug 05, 2022 6:17 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63483

Re: Purifi-based monitor - options

I suppose it could. With a cone with a strong resonance at 4.5kHz, a 1.5kHz input would have its 3rd harmonic amplified acoustically. I don't think a high driving impedance at 4.5kHz would rescue that. Something that I would've liked to see in the Purifi paper is a higher drive level. Their "af...
by chris661
Fri Aug 05, 2022 2:26 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63483

Re: Purifi-based monitor - options

Except they aren't dissimilar other than the fact that series and parallel notches are inherently so when used for EQ / response-shaping. The object of the exercise in the pdf (see pp.4 - 5) was to create the same baseline frequency response (that's the baseline for comparison), via either a series...