Search found 549 matches

by brig001
Tue Sep 12, 2023 3:57 pm
Forum: Assorted Stuff
Topic: Interesting (non musical) YouTube videos.
Replies: 413
Views: 148819

Re: Interesting (non musical) YouTube videos.

There must be a true RMS vs PMPO thing going on here: 600V x 500A is only two cars
by brig001
Wed Aug 30, 2023 11:53 am
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 6152
Views: 1875680

Re: What Are You Listening To Right This Minute?

Toccata and Fugue on a variety of instruments. First one is amazing

https://www.diyaudio.com/community/thre ... ue.400733/
by brig001
Wed Aug 23, 2023 7:16 pm
Forum: Speakers
Topic: Salad Bowl Speakers
Replies: 79
Views: 53909

Re: Salad Bowl Speakers

With the IKEA ones, I couldn’t glue them together because of whatever they were coated with. I taped a sheet of sandpaper to the floor and put the bowls upside down on it then rubbed them until I had a flat on the rim. Glued easily with pva then Don’t know what the Wiko bowls are coated with, but I ...
by brig001
Wed Aug 23, 2023 7:12 pm
Forum: Speakers
Topic: Salad Bowl Speakers
Replies: 79
Views: 53909

Re: Salad Bowl Speakers

Ray, what about something like this: https://ikeahackers.net/wp-content/uploads/2022/06/spherical-ball-speaker-diy.png If I was still making speaker I might be tempted to build a similar pair. 8) I have wondered about those, but the centre to centre distance looks too big to me. Wonder if they coul...
by brig001
Mon Aug 21, 2023 10:22 pm
Forum: Speakers
Topic: Quite possibly my last speakers
Replies: 43
Views: 13288

Re: Quite possibly my last speakers

Sounds like a good plan
Looking forward to the tweeter - not seen one like that before
by brig001
Sun Aug 20, 2023 6:04 pm
Forum: Speakers
Topic: Quite possibly my last speakers
Replies: 43
Views: 13288

Re: Quite possibly my last speakers

Very nice That 60Hz is going to be fun to fill in Do you know where it is coming from? I have similar on my left speaker as there’s a bay window at that side - the other side is open to the dining room, so I don’t have it on the right speaker You have it on both speakers even though your room isn’t ...
by brig001
Sat Aug 19, 2023 10:34 am
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16439
Views: 4654603

Re: Nothing In Particular

<stupid_question>
I assume that ICE cars are shipped with empty fuel tanks, couldn’t they ship electric cars with flat batteries?
</stupid_question>
by brig001
Fri Aug 18, 2023 5:17 pm
Forum: Your Fave Artists
Topic: What Are You Listening To Right This Minute?
Replies: 6152
Views: 1875680

Re: What Are You Listening To Right This Minute?

Anna Lapwood
IMG_6098.jpeg
IMG_6098.jpeg (114.9 KiB) Viewed 3415 times
by brig001
Wed Aug 16, 2023 9:02 am
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

Good job it is a hypothetical speaker and nobody is building it then
Seriously though, many small bookshelf speakers are tuned to around 70Hz, so not ridiculous, unless, like you said, you like bass
by brig001
Sun Aug 13, 2023 4:50 pm
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

I have a LR4 high-pass at 45Hz just to be safe
SWMBO likes karaoke with her friends, and you only need to drop a microphone once…
by brig001
Sun Aug 13, 2023 12:24 pm
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

I think whether room or speaker dominates depends on their relative frequencies. My living room has a strong peak at 50Hz, a large dip at 40Hz, and there’s a big suck out on the left speaker at 70Hz. A bass reflex cabinet tuned to 80Hz would be speaker dependent, below that, the room definitely domi...
by brig001
Tue Aug 08, 2023 11:43 am
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

I guess we would have to put all of the large excursion Thiele-Small parameters in WinISD or similar to know the total effect
by brig001
Tue Aug 08, 2023 10:42 am
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

Not exactly. You're in the acceleration (rising response) region here, where as noted you can and do get variations with drive level due to the electrical & mechanical non-linearities / asymmetries in motor design, suspension[s] etc. Klippel is very good at revealing the reasons for those, but ...
by brig001
Tue Aug 08, 2023 10:01 am
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

Frequency response, i.e. any deviation from a ruler-flat line from 0Hz to infinitely high is defined as linear distortion. Assuming you're working within the mechanical limits of the components, it's basically fixed and doesn't in itself show deviations. I don't think that this is true When you loo...
by brig001
Mon Aug 07, 2023 7:33 pm
Forum: Speakers
Topic: T/S parameters valid for normal listening levels.
Replies: 32
Views: 12186

Re: T/S parameters valid for normal listening levels.

Looking at Klippel tests, excursion seems to be the main thing that makes parameters vary - if excursion is low, the driver is more linear. I dare say some effects cancel and others sum though These are for my drivers: https://www.daytonaudio.com/images/resources/290-208-dayton-audio-nd90-4-klippel-...