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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: RE: Best Mid-Bass of All Times! posted by Belgarchi on July 11, 2012 at 05:32:40:
Hi,You may wish to peruse the attachment.
There are a number of non-linearities in speaker drivers that are fundamental.
All else being equal having a lower excursion for a given SPL (meaning a large cone/diaphragm surface) lowers one group of these non-linearities and lower signal (current) for a given SPL lowers the other group.
So, given identical LF extension the driver with the larger diaphragm and higher efficiency will generally have lower distortion, given competent design and correct assembly of both.
As for the Scan Speak Revelator, they are quite commonly covered in the German DIY Speaker press. If you looked you would find that the 5" Revelator produces over 10% Distortion (Harmonic) for 95dB/1m/100Hz.
Hardly state of the art or low distortion.
No-one seems to have thermal compression data, but looking at voice coil and magnet assembly I would be very surprised if it was less than 4dB at rated power and 2.5dB at halve power (which equates to 95dB/1m). Combined with the very low efficiency you almost certain to run into thermal compression.
If we take (for lack of data for the JBL D130) the JBL 2226 as Benchmark (this in copies and original) as it is a readily available modern 15" "Midbass", we find that it offers less than 1dB compression and less than 1% Distortion (100Hz) for 112dB/1m and much less for 95dB/1m!
So I cannot for the life of me see what recommends the Scan Speak as acceptable "HiFi" Driver, given it's gross distortion and compression.
Of course, I find some people actually prefer severely distorted and compressed music to the real thing... So if that is your goal theScan Speak "Revelator" may indeed be just what is wanted.
So if you like it, enjoy it...
But before you decide to declare it the "Best Mid-Bass of All Times!" you should at least make sure you have a foggy notion what else is out there that may aspire to the title...
Ciao T
Thor
At 20 bits, you are on the verge of dynamic range covering fly-farts-at-20-feet to intolerable pain. Really, what more could we need?
Edits: 07/11/12
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Follow Ups
- RE: Best Mid-Bass of All Times! - Thorsten 06:47:36 07/11/12 (38)
- ,,,and the enclosure size needed for large woofers... - Belgarchi 10:21:45 07/11/12 (1)
- RE: ,,,and the enclosure size needed for large woofers... - Thorsten 10:57:03 07/11/12 (0)
- You forget the response in the mids..... - Belgarchi 09:58:04 07/11/12 (34)
- RE: You forget the response in the mids..... - Thorsten 10:42:54 07/11/12 (21)
- That would most likely deliver... - E-Stat 17:59:10 07/11/12 (20)
- RE: That would most likely deliver... - Thorsten 05:23:44 07/12/12 (19)
- Do you find that - E-Stat 06:12:10 07/12/12 (18)
- RE: Do you find that - Thorsten 08:43:51 07/12/12 (17)
- To set the record straight on this antique JBL stuff... - villastrangiato 13:00:15 07/12/12 (8)
- RE: To set the record straight on this antique JBL stuff... - Thorsten 22:52:45 07/12/12 (7)
- RE: To set the record straight on this antique JBL stuff... - villastrangiato 05:11:37 07/13/12 (6)
- RE: To set the record straight on this antique JBL stuff... - Thorsten 07:57:57 07/13/12 (5)
- Straightening out the mess Thorsten leaves behind... - villastrangiato 07:04:28 07/14/12 (4)
- Getting minimum acoustic sense into this mishmash of false dogma... - Thorsten 08:15:57 07/14/12 (3)
- ugh - villastrangiato 10:06:05 07/14/12 (2)
- RE: ugh - Thorsten 10:46:17 07/14/12 (1)
- double ugh - villastrangiato 11:48:57 07/14/12 (0)
- Ah, narrow directivity tweeter - E-Stat 09:06:57 07/12/12 (7)
- RE: Ah, narrow directivity tweeter - Ozzie 11:31:31 07/15/12 (3)
- RE: Ah, narrow directivity tweeter - Thorsten 00:01:45 07/16/12 (0)
- RE: Ah, narrow directivity tweeter - villastrangiato 13:21:58 07/15/12 (1)
- RE: Ah, narrow directivity tweeter - Thorsten 00:20:05 07/16/12 (0)
- RE: Ah, narrow directivity tweeter - Thorsten 09:17:45 07/12/12 (2)
- RE: Ah, narrow directivity tweeter - E-Stat 09:27:05 07/12/12 (1)
- RE: Ah, narrow directivity tweeter - Thorsten 10:04:55 07/12/12 (0)
- 6 - 7 octaves if you're into low fi... - villastrangiato 10:35:18 07/11/12 (11)
- RE: 6 - 7 octaves if you're into low fi... - Thorsten 11:16:34 07/11/12 (10)
- RE: 6 - 7 octaves if you're into low fi... - villastrangiato 13:01:50 07/11/12 (9)
- RE: 6 - 7 octaves if you're into low fi... - Thorsten 13:30:22 07/11/12 (8)
- Double face palm time, yet again... - villastrangiato 18:00:23 07/11/12 (3)
- RE: Double face palm time, yet again... - Thorsten 05:34:47 07/12/12 (2)
- Are you as deranged as your posts suggest? - villastrangiato 08:19:59 07/12/12 (1)
- RE: Are you as deranged as your posts suggest? - Thorsten 09:43:54 07/12/12 (0)
- Never saw measurements proving your 'point.' - Belgarchi 16:34:50 07/11/12 (3)
- RE: Never saw measurements proving your 'point.' - Thorsten 05:22:30 07/12/12 (2)
- I think - Presto 11:28:05 07/12/12 (1)
- RE: I think - Thorsten 11:44:45 07/12/12 (0)
- Actual measurements "small vs. big midbass"... - Thorsten 06:56:46 07/11/12 (0)
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