Help with David Nordschow DNA DNS-410 Cabinet

[Ryland Buller]

Howdy folks,

I just purchased a used DNA DNS-410 cab that is supposed to have a non working tweeter. I don't know if that's actually the case but seller said they weren't getting any sound out of it.

Has anyone had any luck getting in contact with David lately or are on good terms with him that could assist in getting in touch with him in case spare parts or a replacement for this tweeter is needed?

thanks much!!

 

[DJ Bebop]

Rip Van Dan?

 

[DJ Bebop]

Rip Van Dan?

@Rip Van Dan

 

[Ryland Buller]

@Rip Van Dan

Thanks for looking out! @DJ Bebop

 

[Ryland Buller]

The crickets don't chirp so loud over here.

Good news is that when I received the cab, I pulled off the rear jack plate and poked around. The tweeter was still reading a nominal 8 ohms between the terminals. I then looked directly to the left of the jack plate on the back wall and saw the crossover mounted there. I saw what could be a fuse and pulled it out. What I found was likely an sv8.5-8 size 12V 10 watt "festoon" bulb. The filament was open. I have to assume that this was factory as the "holder" for this bulb is specific to this bulb type. I have to assume that this is the protection for the tweeter. I've ordered what I hope is the correct replacement so hopefully it's just as simple as that! I hope this can help someone if it also seems that their tweeter has "gone out".

Now I'm hoping and praying that all the drivers survived the shipment and are working properly.

 

[jjk2007]

Part of the original Eden design was the same thing. I travelled across the country with an old Eden D410T cabinet and ended up blowing that protection bulb at some point. I got the cheap replacement version at an Autozone to get me through until I got back home for a hot minute and eventually tracked down the actual bulb that was supposed to go in there. I wasn't sure if David did the same thing with the DNA cabs but it looks like it is so. Good luck with that cab and keep us posted on how it all works out.

 

[DJ Bebop]

I am a little surprised that @Rip Van Dan didn't show up here

Hope he is well.

He has a lot of wisdom on all things Eden and DNA

 

[Rip Van Dan]

I am a little surprised that @Rip Van Dan didn't show up here

Hope he is well.

He has a lot of wisdom on all things Eden and DNA

Well Crap! I've been busy with some extended family stuff going on but I'm OK. Didn't realize I'd been away so long. That thing that looks like a car's double ended lamp is indeed used as a fuse to protect the tweeter. If you still need help on that I can write to David and find out more specifics for you. With his Eden cabs, you never wanted to turn the L-pad (tweeter control) all the way off as it would eventually burn out the L-pad itself because there was no where for the blocked current to go (as best I understand it). If you didn't want to hear the tweeter, we just turned it on slightly above off and not enough power would get through to make it audible above a whisper, yet enough got through it didn't burn up the L-pad..

That fuse-light will actually be visible from the front when it starts lighting up and that does mean its trying to send too much power to the tweeter. Not a problem to have it flash from time to time but you didn't want to see it come on and stay on because that would burn-out the L-pad. Not sure that's a problem with his DNA cabs (called DNS for David Nordschow Speakers) but I can check with him and see what he says.

Regarding the correct item to replace it with, we might be able to get an answer more quickly form Amin (@Bassmann1968). I think he has the part number for it. Used to be you could get it either at an electronics parts place OR and automotive parts place. You do have to pay attention with the rating on it though as opposed to just buying the first thing you see.

If the tweeter is otherwise dead, it may just need a new diaphragm. I can check with David to find out what tweeter goes in there and/or what diaphragm to use to replace just the diaphragm.

If the OP will let me know, I can check with David about both if needed. Be aware thought that info can sometimes take a while to get from David. He doesn't e-mail a lot because he lost one of his hands in his younger years while rock climbing, so keyboarding is a bit slow. Good news is that his info is usually pretty succinct when you get it.

 

[thebandcircle]

I was in contact with David Nordschow somewhat recently about a replacement 10" driver. We exchanged emails back and forth, he gave me a price and I gave him my shipping info. He eventually stopped communicating and I gave up on my end. I'm sure he is busy with life and his old business is probably not a big priority. No hard feelings at all, I just hope he's enjoying his time on this planet. I do wish I could have grabbed a handful of replacement drivers. The 410's are my favorite cabs ever! I own two of them, as well as two single 12's. Also own a single 10" cab. Ryan

 

[Stylee Mousse]

I love lightbulb limiters! I put real horns in a pair of carvin floor monitors years ago with eminence crossovers that had those bulbs.

The wife played bass in my band at the time and sang lead. It was fun to watch the lights flash through the 12” speaker surrounds when she hit it.

In the end I just hardwired the fuse circuit because the bulbs blew too often. The horns kept on trucking…

 

[Ryland Buller]

Well Crap! I've been busy with some extended family stuff going on but I'm OK. Didn't realize I'd been away so long. That thing that looks like a car's double ended lamp is indeed used as a fuse to protect the tweeter. If you still need help on that I can write to David and find out more specifics for you. With his Eden cabs, you never wanted to turn the L-pad (tweeter control) all the way off as it would eventually burn out the L-pad itself because there was no where for the blocked current to go (as best I understand it). If you didn't want to hear the tweeter, we just turned it on slightly above off and not enough power would get through to make it audible above a whisper, yet enough got through it didn't burn up the L-pad..

That fuse-light will actually be visible from the front when it starts lighting up and that does mean its trying to send too much power to the tweeter. Not a problem to have it flash from time to time but you didn't want to see it come on and stay on because that would burn-out the L-pad. Not sure that's a problem with his DNA cabs (called DNS for David Nordschow Speakers) but I can check with him and see what he says.

Regarding the correct item to replace it with, we might be able to get an answer more quickly form Amin (@Bassmann1968). I think he has the part number for it. Used to be you could get it either at an electronics parts place OR and automotive parts place. You do have to pay attention with the rating on it though as opposed to just buying the first thing you see.

If the tweeter is otherwise dead, it may just need a new diaphragm. I can check with David to find out what tweeter goes in there and/or what diaphragm to use to replace just the diaphragm.

If the OP will let me know, I can check with David about both if needed. Be aware thought that info can sometimes take a while to get from David. He doesn't e-mail a lot because he lost one of his hands in his younger years while rock climbing, so keyboarding is a bit slow. Good news is that his info is usually pretty succinct when you get it.

Thank you kindly for all this wonderful information. I believe I've found the right bulb to replace it so I will report back when it arrives and I have the chance to test. I'm hoping that all the drivers survived the shipping journey working properly but I won't know until I have the bulb. I'm thankful to hear that it is still possible to contact David.

 

[dbsfgyd1]

The crickets don't chirp so loud over here.

Good news is that when I received the cab, I pulled off the rear jack plate and poked around. The tweeter was still reading a nominal 8 ohms between the terminals. I then looked directly to the left of the jack plate on the back wall and saw the crossover mounted there. I saw what could be a fuse and pulled it out. What I found was likely an sv8.5-8 size 12V 10 watt "festoon" bulb. The filament was open. I have to assume that this was factory as the "holder" for this bulb is specific to this bulb type. I have to assume that this is the protection for the tweeter. I've ordered what I hope is the correct replacement so hopefully it's just as simple as that! I hope this can help someone if it also seems that their tweeter has "gone out".

Now I'm hoping and praying that all the drivers survived the shipment and are working properly.

One thing you may want to consider is with the Eden cabs, you need to have the L-Pad cracked open. Running the cab with the tweeter completely off can cause the L-Pad to fry. I have no clue if the design is the same, but thought you may want to know.

 

[Ryland Buller]

Update:

I received the replacement bulb and installed it and fortunately the tweeter is back in action!

Unfortunately, it appears that one of the woofers is not working properly. My guess is that the magnet shifted during shipping and now the voicecoil is seized in the gap.

If anybody has any hints on sourcing a replacement woofer or an equivalent replacement, that would be wonderful!