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Multi-Way Conventional loudspeakers with crossovers

Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
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Old 10th November 2019, 04:58 AM   #4151
Ro808 is offline Ro808  Netherlands
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According to Georg Neumann: "The subjective effect of excessive group delay is a “loosening” of the bass or a “less dry” bass quality."

Interesting findings about the audibility of GD are found in this thread.

Last edited by Ro808; 10th November 2019 at 05:05 AM.
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Old 10th November 2019, 05:04 AM   #4152
AllenB is offline AllenB  Australia
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Is it possible to cover the whole spectrum, high spl, low distortion with a 2-way?
Quote:
Originally Posted by krivium View Post
Could you elaborate on that AllenB please?
Sure, but sorry which part?

I assume the time of flight, like you suggested I would work with the GD. The goal would be to find the matching phase slope. Delaying based on physical measurements is not likely to be as effective/accurate.

Last edited by AllenB; 10th November 2019 at 05:07 AM.
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Old 10th November 2019, 06:28 AM   #4153
Ro808 is offline Ro808  Netherlands
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Quote:
Originally Posted by camplo View Post
The room is a sympathetic reaction to the source...so though it may blur things due to hangover, since music is a continuous performance of signals....the tactile feedback as well as conscientiously searching for the difference been the presentation of an 808 in my head phones vs my loudspeaker, results in a difference that I can perceive easily. Yeah, it doesn't sound incorrect either way, but one is lying and one is....less lying. Lets not forget that in sound engineering, a bass with a slow attack on the envelope (ie higher than 0ms) is often a desirable thing, from a creative standpoint. 10ms renders a nice warm feel, 20-50ms is a nice soft glow, as well. Start getting towards 100ms and its a lot more noticeable, yet its within creative norm.

"A TR-808 bass drum note is produced when the µPD650C-085 CPU applies a common trigger and (logic high) instrument data to the trigger logic. The resulting 1-ms long pulse is delivered via the pulse shaper to the bridged-T network (a band pass filter), whose ringing produces the core of the bass drum sound. The 1-ms long pulse also activates an envelope generator, which alters the bridgedT’s center frequency for the first few milliseconds and supplies a retriggering pulse to the center of the bridged-T network after a few milliseconds. Leakage through the retriggering pulse circuit accounts for “sighing” of the bass drum’s pitch."

Click the image to open in full size.

This is how the TR-808's emulated bass drum circuit is supposed to work. More info here.
Here's the paper for the cymbal circuit.

Due to ageing of components differences between individual real TR-808s are common.

Last edited by Ro808; 10th November 2019 at 06:50 AM.
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Old 10th November 2019, 06:48 AM   #4154
camplo is offline camplo
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Lol you went real technical on that one Ro808 lol, the 808 instrument is a very ambiguous name nowaday though it is still used distinctively for the originating instrument or now, a vst simulation, or sample, or anything that sounds like it could have originated from the 808 or inspired by it. Non the less, in current music, it’s envelope parameters are all tweak-able, from attack to release to starting freq to ending to everything in between, sine to square waveform, crunched into distortion even, so 808 is just a basic way to say “electronic generated bass signal” thst is some kind of derivative of the original instrument, that usually starts and then fades away but even then some are set to hold the note until the key is let go, and then release/decay/sustain settings take over. Kinda like saying bass guitar.
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Old 10th November 2019, 07:06 AM   #4155
Ro808 is offline Ro808  Netherlands
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What's my name again?

Click the image to open in full size.

Last edited by Ro808; 10th November 2019 at 07:10 AM.
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Old 10th November 2019, 07:32 AM   #4156
Ro808 is offline Ro808  Netherlands
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Not being an analog fetishist, I use this for 808 sounds:
Attached Images
File Type: png Roland 808 Expanded in Ableton.png (888.5 KB, 274 views)
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Old 10th November 2019, 09:08 AM   #4157
bushmeister is offline bushmeister
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Hi guys great thread. Thought this might be useful. Lean Business is now stocking Celestion's new LH9045 horn for their axi driver!

Celestion LH9045R 2 90 x 45 Wide Bandwith Horn

Attached Images
File Type: jpg Celestion horn 9045 specifications.jpg (133.8 KB, 286 views)
File Type: jpg celestion_horn_90_45.jpg (195.6 KB, 286 views)
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Old 10th November 2019, 09:50 AM   #4158
Ro808 is offline Ro808  Netherlands
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Thanks for notifying!

These are not exactly cheap at £950.00 for the LH9045R and £1,050.00 for the LH6040R.

A Klipsch K402 is only slightly more expensive, and probably (a lot) cheaper in the US due to shipping costs.
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Old 10th November 2019, 10:16 AM   #4159
Ro808 is offline Ro808  Netherlands
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The horns are made by this company btw.
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Old 10th November 2019, 11:48 AM   #4160
docali is offline docali  Germany
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imho a much better solution:

Wood Horn F280A / Yamamoto Sound Craft

F280A01.jpg
F280A02.jpg

Does anybody know if these horns are still in production?
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https://sphericalhorns.net
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