Search found 2552 matches

by chris661
Mon Aug 01, 2022 8:28 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63693

Re: Purifi-based monitor - options

The bottomless notch, in that implementation, is a network which will give a near-dead-short at a particular frequency. That gives maximum electrical damping at that frequency, and (via the woofer inductor forming a potential divider) puts a deep notch in the frequency response. Without the bottomle...
by chris661
Sun Jul 31, 2022 2:03 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63693

Re: Purifi-based monitor - options

Further thought: the dips in the lower-mid/upper-bass area might be floor and/or ceiling reflections. I ended up adding another driver near the floor to fill in the dips - https://www.audio-talk.co.uk/phpBB3/viewtopic.php?t=8257 Which worked well. The speakers gained a solid upper-bass "slam&qu...
by chris661
Sun Jul 31, 2022 1:00 pm
Forum: Speakers
Topic: Purifi-based monitor - options
Replies: 196
Views: 63693

Re: Purifi-based monitor - options

Some measurements here - from approx 1m away : First the full combo, then the Purifi MidBass only. Not quite what I expected actually, although the 3 to 10kHz area is a bit raised. What I'm not seeing is an obvious lump around the 3 to 4kHz area where the Purifi ought to be sticking up in the mix. ...
by chris661
Tue Jul 26, 2022 9:01 pm
Forum: Speakers
Topic: My Swansong speaker build
Replies: 210
Views: 791609

Re: My Swansong speaker build

I'd written up a reply, and then got logged out before I managed to send it. Here's V2.0. A quick note on the amp at Owston, Nick's OBs, etc: - The amp was a Crown MA5002VZ, and has been well looked after. In its day, it was a very good amplifier. I wasn't particularly surprised, then, that it held ...
by chris661
Mon Jun 20, 2022 8:19 pm
Forum: Speakers
Topic: PERSPEX QUASAR ver 2.0 prototype build
Replies: 324
Views: 127729

Re: PERSPEX QUASAR ver 2.0 prototype build

First order, Mark, and fairly high up IIRC - knocking off a couple of dB at 5kHz-ish. Difficult to define "aggressive", but there are a few things that might be happening. Some of them psychoacoustic, some of them inherent in the drivers. I'm glad they appear to have been well-received. Ch...
by chris661
Mon Jun 20, 2022 5:55 pm
Forum: Speakers
Topic: Fun at a theatre - 3x Faital 18XL1800
Replies: 6
Views: 4783

Re: Fun at a theatre - 3x Faital 18XL1800

Thanks, gents. I used two of these subs for a village festival over the weekend and they did well with the following settings: - EQ to be flat to 20Hz (requiring lots of EQ and power) - Set a highpass filter to pick the -3dB point, balancing output vs extension. -3dB@33Hz came out about right for th...
by chris661
Mon Jun 20, 2022 5:43 pm
Forum: Speakers
Topic: PERSPEX QUASAR ver 2.0 prototype build
Replies: 324
Views: 127729

Re: PERSPEX QUASAR ver 2.0 prototype build

Having spent some time with these speakers myself (not in perspex, granted), I'd be interested to read your impressions, Mark.

Chris
by chris661
Fri Jun 10, 2022 9:40 am
Forum: Speakers
Topic: another cunning plan
Replies: 44
Views: 19415

Re: another cunning plan

Ed, As far as I can tell, "depth" can be attributed to two things while we're listening: Ratios of direct-to-reverb sounds in the recording. Jennifer Warnes's cover of Bird on a Wire is a really good example here. Skip to 2.57. Lead vocal is front and centre, but the echoed lines are to th...
by chris661
Wed Jun 08, 2022 10:29 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 229
Views: 266306

Re: Something Stirs in the Workshop

Sorry Steve!
A bout of Covid has knocked me on my arse. Hoping to be back to normal service soon.

Chris
by chris661
Sun May 29, 2022 4:12 pm
Forum: Speakers
Topic: Fun at a theatre - 3x Faital 18XL1800
Replies: 6
Views: 4783

Fun at a theatre - 3x Faital 18XL1800

I posted this on diyAudio, but some of you here might be interested - https://www.diyaudio.com/community/threads/fun-in-a-theatre-3x-faital-18xl1800.386725/ It's nice to be getting back to live events. I've had a few weddings and things like that, but this one really reminded me of why I do it. Chris
by chris661
Sun May 29, 2022 3:39 pm
Forum: Speakers
Topic: What should I hear?
Replies: 70
Views: 28012

Re: What should I hear?

I've tried to present useful information that might allow you to explore new facets to this hobby, and I've been met with "anathema" and "I'm not reading that". Why should I bother?

I'm done. Best of luck to you.

Chris
by chris661
Sun May 29, 2022 2:50 pm
Forum: Speakers
Topic: What should I hear?
Replies: 70
Views: 28012

Re: What should I hear?

And your assuming a transparent relationship between what you measure and what you hear. When in reality the relationship is so opaque you may as well ignore measurements and go straight to listening . An unfortunately common misconception. Floyd Toole is someone who actually did the studies on thi...
by chris661
Sat May 28, 2022 11:32 am
Forum: Speakers
Topic: Much modified Wharfedale Denton
Replies: 3
Views: 4426

Re: Much modified Wharfedale Denton

Yep, Faital Pro get a thumbs-up from me. I have the following:

- 10FH520 x2/side in the big main PA speakers
- 10HX230 in the small main speakers
- 18XL1800 - new subwoofers

Even when pushed towards (what should be) the ragged edge, they hold up well.

Chris
by chris661
Fri May 27, 2022 12:18 pm
Forum: Speakers
Topic: What should I hear?
Replies: 70
Views: 28012

Re: What should I hear?

"I heard that herbs/spices make my food taste nicer, so I put 1lb of chilli powder into my next meal. I didn't like it, so I won't season my food in the future."
by chris661
Thu May 26, 2022 12:38 pm
Forum: Speakers
Topic: Monitor Audio - new concept
Replies: 10
Views: 5939

Re: Monitor Audio - new concept

I was talking specifically about the upper-bass response dips that come from floor/ceiling reflections. Vertically distributed LF sources seem to help.

DSP can't help here, since late(r) arrivals are the source of the cancellations.

Chris