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DNA Owners Group

#701
BOOG said:
I wonder if it had something to do with the material makeup of some of the components. Wasn’t one of the marketing points of Eden amps that they used gold contacts and that might have contributed to higher rates of oxidation etc?
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I would expect the opposite to be true. Contrary to popular belief, Gold has a lower conductivity than Copper, meaning that Copper is the better conductor, but Gold has a very high corrosion resistance (gold is one of the least reactive metals in the periodic table), so I would expect gold contacts to accumulate little, if any, oxidation.
 
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#702
Many gold plated contacts used in jacks and plugs are purely cosmetic. It's so thin that after a dozen uses the plating is already worn through. This is the reason most professional connectors for low level signals are hard phosphorous-nickel plated and not gold. The nickel is plated about 10 times thicker than gold (and is often used as an under-plating for gold w/ thinner deposition) and is much harder than gold (even hard gold).

There are cheap jacks that are tin plated, they are less reliable but not just because of the plating (which is softer than nickel). It's because to the underlying surface finish and the quality of the mating parts. These tend to become intermittent at a much higher rate, cleaning can help but doesn't really fix the root cause of the problem.

I migrated to using nickel plated jacks many years ago, after being burned by a defective batch of tin plated jacks that were unknowingly substituted in a production run. Fortunately there were a small number of these products and they are long since obsolete.

I don't recommend cleaning any jacks unless there is a confirmed reason to do so. I have thousands of products out there, full of jacks that have never been cleaned and have never had any need for jack maintenance after 15-20 years. Maybe it's a different school of thought, but since there's no history of jack issues with my products, it's a perfectly valid approach backed by plenty of data.

So, it's cleaning jacks every year because of routine or continuing problems, or never cleaning jacks because there's no problems. You pick.
 
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#703
agedhorse said:
Many gold plated contacts used in jacks and plugs are purely cosmetic. It's so thin that after a dozen uses the plating is already worn through. This is the reason most professional connectors for low level signals are hard phosphorous-nickel plated and not gold. The nickel is plated about 10 times thicker than gold (and is often used as an under-plating for gold w/ thinner deposition) and is much harder than gold (even hard gold).
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Excellent point! Thanks for the clarification!
 
#704
would like to pose a situation to the group and would appreciate any input.

since mr. nordschow had to close dna's doors about 18 months ago, was wondering what we, as users and owners of dna speaker cabinets, can do if we blow a speaker?

am interested in picking up a dna dns210 locally (4ohm cab) and one of the speakers is blown.

should i just yank out the "good" speaker, put it aside, and replace both speakers with a different brand? if so, what suggestions would you put forth to bring the cabinet up to speed?

thanks! :)
 
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#705
bubba-b said:
would like to pose a situation to the group and would appreciate any input.

since mr. nordschow had to close dna's doors about 18 months ago, was wondering what we, as users and owners of dna speaker cabinets, can do if we blow a speaker?

am interested in picking up a dna dns210 locally (4ohm cab) and one of the speakers is blown.

should i just yank out the "good" speaker, put it aside, and replace both speakers with a different brand? if so, what suggestions would you put forth to bring the cabinet up to speed?

thanks! :)
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I am a big fan of the Eminence Low Riders. However, Faital makes a great Neo speaker (expensive though).
 
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#707
bubba-b said:
would like to pose a situation to the group and would appreciate any input.

since mr. nordschow had to close dna's doors about 18 months ago, was wondering what we, as users and owners of dna speaker cabinets, can do if we blow a speaker?

am interested in picking up a dna dns210 locally (4ohm cab) and one of the speakers is blown.

should i just yank out the "good" speaker, put it aside, and replace both speakers with a different brand? if so, what suggestions would you put forth to bring the cabinet up to speed?

thanks! :)
Click to expand...
At this point, you are really buying a box and will need to do the math to find an appropriate driver to work well. Yes, replacing both drivers (maybe selling the good one if it really is good would help offset the cost)
 
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#708
bubba-b said:
would like to pose a situation to the group and would appreciate any input.

since mr. nordschow had to close dna's doors about 18 months ago, was wondering what we, as users and owners of dna speaker cabinets, can do if we blow a speaker?

am interested in picking up a dna dns210 locally (4ohm cab) and one of the speakers is blown.

should i just yank out the "good" speaker, put it aside, and replace both speakers with a different brand? if so, what suggestions would you put forth to bring the cabinet up to speed?

thanks! :)
Click to expand...
Rather than zeroing in on brands of drivers, my approach would be to work out the numbers for interior volume and ported area etc, and then start comparing the notes online with different manufacturers for compatibility with driver/box design specs.
 
#709
bubba-b said:
would like to pose a situation to the group and would appreciate any input.

since mr. nordschow had to close dna's doors about 18 months ago, was wondering what we, as users and owners of dna speaker cabinets, can do if we blow a speaker?

am interested in picking up a dna dns210 locally (4ohm cab) and one of the speakers is blown.

should i just yank out the "good" speaker, put it aside, and replace both speakers with a different brand? if so, what suggestions would you put forth to bring the cabinet up to speed?

thanks! :)
Click to expand...
Had somebody else with a blown speaker a while back and I e-mailed David to see if he had any or any recommendations for replacement. The factory is not making any more of them of course, but he did have some of the 10" ceramic magnet speakers available. I think they were 8Ω, which when wired in parallel would give you a 4Ω cab. There are none of the Neo speakers left though. With David's permission I gave him David's personal e-mail address so he could contact him and check the price. Unfortunately I don't know if he went ahead and got the replacement because I didn't hear back, but if you want to DM me your e-mail address, I'll be happy to write to him to see if he still has any and can e-mail you back about them. David is not very fast with his e-mails. And they are always short and to the point. I imaging that's because he only has one arm (lost one in climbing accident as a teenager), so typing is a chore.

Best thing of course would be to get a replacement speaker from him. If that's not doable, then I would take measurements of the inside space and the flared and textured shelf port it has. Then I would call Eminence and see what they think should work with those measurements. Odds are though that the box with the replacement speakers will not be nearly as loud or handle as much power. That cab handles 700-watts rms with David's custom speakers. He's always designed his own speakers as well as some OEM speakers for other companies in the past, so there's nothing off the shelf that will perform the same way or sound as good. But if you can't get a replacement speaker, one from Eminence still beats a poke in the eye with a sharp stick.

Also that flared and textured shelf port moves air out of the cab more quickly than a standard shelf port or a flared shelf port, so if it comes down to replacing both speakers, be sure to mention that to Eminence. It's a bigger box than most 210's so be sure you get them accurate interior measurements
 
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#710
Hello group.. Not much going on in here these days. Since David has shut down, has anyone had any issues with their amps? My 800 seems to be in compression mode. The on/off doesn't change anything nor does the threshold or ratio knob. Everything sound really compressed and is really bothering me. Previously, I would just call David, but I don't want to be intrusive. Just looking for thoughts you all might have
 
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#712
iriegnome said:
I guess they are no longer called Low Riders. Eminence Delta LFA's seems to be the current name.
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Low Rider is a Peavey trademark. Eminence never made a Low Rider and their LF versions are modified versions of what used to be called “HO”.
 
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#716
Alright my silent group of DNA fans. I am hording a ton of gear. It is clear that I will never use my DNA DNS-410 again. Those days of big venues are now long gone. So I am putting her up for sale. No pic's yet. But it is in near new condition. Complete with removeable wheels (I am pretty sure I know where they are). It has a DNA soft pull over cover, but has spent its entire life in an anvil case. She is a beast. IIRC, the case was $400. Not really sure what is an acceptable number for this one. I would think $750 is a good place to start. Obviously, no shipping. I bought mine direct from David.
 
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#717
A couple of pic's. Case by its side. I will get better pics soon
 

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