GR Res Danny Richie delves into wide-band design

Jump to Latest
#21
maty tinman said:
Can you explain it?
Click to expand...

The graphs say nothing about that. An impulse response, if teh XO is right, will show it.

If you can maintain a centre-to-centre distance of a quarter wavelength or less at teh XO point the drivers effectively become coincident, sorting one of the major issues of any multiway loudspeaker.

dave
 
  • Like
Reactions: maty tinman
#22
Bad choice to listen to at 86 dBSPL continuos, that is very high in a room. Usually I listened about 65 dBSPL but with good/very high recordings (up to DR 18 dB, 15 dB is a good number). I want low distortion up to 65+15, 80 dB.

With commercial music, DR < or << 10 dB -> 65+10, 75 dB.

From the beginning Danny Richie warns that it is for small rooms and not very high volumes.
 
#24
All this talk of distortion measures — interetsing, but has Geddes not shown us that they ar emore or less meaningess when it comes to sonics.

I know that distortion, or lack of it, or from a more revealing POV, retention of information, is important to the sonics, but from Geddes work the way we measure it is only of acedemic interest.

dave
 
  • Like
Reactions: Toolermike
#26

Attachments

  • Etymotic Research ER-4S - thdl.png
    Etymotic Research ER-4S - thdl.png
    25.6 KB · Views: 55
#29
Toolermike said:
@Studley As an aerospace toolmaker I know a bit about cutting-edge composites, but I certainly do not consider myself an expert on them. In fact, my expertise is limited to eating and the taking a good ol' country *. My knowledge of loudspeakers pales in comparison with DR's. I appreciate his videos for their factual and measurement-based nature. It is indeed human nature to revert to opinion sometimes though. I have not seen the video you cite, but based on his experience I might assume he had actually tried it or perhaps observed it in operation. I know I have listened to audio components that were hailed as the best thing since sliced bread and walked away befuddled. I have also listened to equipment from back-burner operations that floored me-that actually sounded like all of the superlatives used to describe the stratospherically-priced stuff across the way. (Gotta' give a shoutout to Frank Alstine here.) I digress though. I appreciate DR for his non-denominational, all-inclusive sermons. Where a lot of folks in so-called high end audio shops might smirk at my backwoods accent, DR seems to want to lift up us all. Kinda' makes me feel like less of a dumb. Secondly, his product is what I would consider attainable. I am poor but I'm damn sure not proud of it. DR supports me in this respect because he also supports DIY. Thirdly, as mentioned above, he is my neighbor. We are cut from the same cloth, just as you might be akin to your British neighbors. I understand this and can weather the occasional regional jab. Hell, I thought PRAT was merely a smoke screen until I actually heard it. To think that electronic circuitry can actually affect a recording this way baffles me to this day. I will close with this. Studley, I am from East Texas. Our first cousin is Appalachia. Confusion is defined as Father's Day in East Texas! Hell, I am probably the only person you have ever enountered who has a pet cockroach. (It gets a bit lonely around here sometimes.) In my sphere my opinions are poorly received, but my intelligence is rarely questioned. When it is, I can get a little butthurt. We are good though-"Welcome back y'all!"
Click to expand...
Toolermik, let me first say I never questioned your intelligence. On the subject of regional connections, I am a Yorkshireman, as is Andrew Jones. So the last thing I’ll say on this subject is this; if AJ espoused a mildly contentious view on some technical aspect of speaker design then I’d sit up take note whereas if DR did something similar then I’d be left thinking it may or may not have some merit. And that would have nothing at all to do with where they originate 😉
 
#30
#32
Studley said:
Toolermik, let me first say I never questioned your intelligence. On the subject of regional connections, I am a Yorkshireman, as is Andrew Jones. So the last thing I’ll say on this subject is this; if AJ espoused a mildly contentious view on some technical aspect of speaker design then I’d sit up take note whereas if DR did something similar then I’d be left thinking it may or may not have some merit. And that would have nothing at all to do with where they originate
Click to expand...
I am pretty sure I understand that Mr. Studley. I was merely trying to draw a parallel to illustrate why I was offput by your initial remark. Then the Spaniard chimes in with an even more unabashed insult:
maty tinman said:
Danny does not have the academic background, it is obvious, but he is not the only one. Very few have studied subjects like Electroacoustics, signal processing... you know.
Click to expand...
I just don't know man. I honestly have no idea about DR's academic background, nor that of any other contributor to this thread. In my short time here however I have come to understand that there is a core contingent that know one another very well. Texans though are by nature outriders and could really give a rat's *** about opinions. I thank little brown baby Jesus every night that I have no reputation to uphold, because certainly I would fail. Really, all I was trying to say was that if I were DR I would take exception. I would guess however, based on personal experience, that Mr. Ritchie has heard it all before. I am curious as to whether Mr. Ritchie partakes of this forum. I am pretty sure though that he has associates who do. I commend them all for their restraint. Perhaps this level of discourse is the norm in Audio Valhalla. If it were, Mr. Ritchie would certainly know because he has been in this game for a long time. By his own admission he is doing well at it financially. There is nothing like favorable review and a big ol' fat bank account to assuage one's feelings. My only intention here was to bring a bit more civility, and some levity, to the discourse, but I think I am in way over my head and will henceforth keep my mouth shut. Thank you all for your responses.
 
#35
DR runs a business. He has a sound that he is shooting for and has quite a few vocal customers that like that sound. He does tend to criticize other speaker designs that don't fit his belief structure a bit too much. He is also a big proponent of better quality caps, resistors, and inductors can make a huge difference in the sound. That is not difference from many on this site. How many have one of his speaker designs?
 
#36
Danny is doing good things. Anyone honestly promoting diy is.

He is good, but not perfect. For instance Al had to redo all the XOs GR did for his RAW designs. But no one is perfect.

But there is, like with Deckard, a perhaps undeserved following of acolytes.

Everytime a new diyer's first build makes him happy that is a good thing. For that, a proven design is recommended. Most of Danny’s probably fall into that category and he provides all the bits and backup.

Every loudspeaker is a set of compromises. Listen and learn.

dave
 
  • Like
Reactions: taloyd, vrbbra, BHD and 1 other person
#37
planet10 said:
Clips are next to useless to understand how well a driver really does.

Too much loss of, and the addition of superfulous information makes it next to impossible.

dave
Click to expand...

The sound of the audios indicates that when cutting the 3" at 350 Hz? the distortion that appeared in the ASR graphs is not there or is not appreciable. Magnat MA 900 has low distortion (good tubes implementation as preamp) at 4 Ohms and the 5.25" coaxial of the KEF Q100 another so much, so if there was, I would listen to it, which is not the case.
 
#39
You are right if we talk about frequency, phase, amplitude and ROOM (home, with furnitures... not empty) but not about, or much less, the distortion <- amplifier+speakers.

About the room, the GR-Research room I do not think it adds any distortion. Then, again, amplifier+speakers is the more important in the recorded audios.
 
Last edited:
You must log in or register to reply here.
Top Bottom