Watts

[Lowendtech]

My thoughts exactly!

Do tell, @Rip Van Dan ......
810? 98dB 10.....
4x15? 101dB 15.....
Is this a PJB trick? Like 16-95dB 5"?

Do tell. With pics! I gotta see this beast. Talk about GAS.

David Nordschow 410. I used to have one and they’re pretty loud. Can’t confirm those #’s though, myself.

 

[agedhorse]

No bass reflex 410 in the world is going to achieve a real world, measurable 106dB/1W/1M average sensitivity. If you were to work the numbers backwards, you would see in physics and engineering terms that such a driver is simply unobtanium in terms of efficiency.

It's possible in a large horn loaded enclosure, but these are not practical for most bass guitar applications due to size and/or frequency response if folding the horn is used to decrease the external size.

I suspect that either you have mid-stated the actual spec, or the spec is actually 2 watts (not 1) into a 4 ohm load, the stated sensitivity is the peak sensitivity mathematically derived from the RMS value, the peak sensitivity based on the highest value on the sensitivity versus frequency response plot, or a combination of the above.

 

[Lowendtech]

No nass reflex 410 in the world is going to achieve a real world, measurable 106dB/1W/1M average sensitivity. If you were to work the numbers backwards, you would see in physics and engineering terms that such a driver is simply unobtanium in terms of efficiency.

It's possible in a large horn loaded enclosure, but these are not practical for most bass guitar applications due to size and/or frequency response if folding the horn is used to decrease the external size.

I suspect that either you have mid-stated the actual spec, or the spec is actually 2 watts (not 1) into a 4 ohm load, the stated sensitivity is the peak sensitivity mathematically derived from the RMS value, the peak sensitivity based on the highest value on the sensitivity versus frequency response plot, or a combination of the above.

From his website re: the DNS410 specs.
Power Handling: 1400 W RMS - 2800 W Peak

Impedance: 4/8 Ω

Sensitivity: 106dB @2.83V/1M

SPL: 137 dB SPL max

Frequency Response: 37Hz to 14KHz

Size: 33" x 23.75 "x 16"

Weight: 79lb

Coverage Pattern: 60 degree

Tuning: Flaired Shelf port 52Hz

I make no claims about the authenticity of his #’s. Loud though, it is.

 

[agedhorse]

For reference, 106dB/1W/1M would be 25% efficiency which even the very best of the best pro audio speaker system designers with unlimited resources would give their first born to achieve in any bass reflex design.

 

[Old Garage-Bander]

For reference, 106dB/1W/1M would be 25% efficiency which even the very best of the best pro audio speaker system designers with unlimited resources would give their first born to achieve in any bass reflex design.

So you're saying, there IS a chance?

 

[redneck2wild]

...
Impedance: 4/8 Ω

Sensitivity: 106dB @2.83V/1M
...

I believe 2.83V translates to 2 watts at 4Ω.

 

[agedhorse]

So you're saying, there IS a chance?

I wouldn't bet on it.

 

[Rip Van Dan]

My thoughts exactly!

Do tell, @Rip Van Dan ......
810? 98dB 10.....
4x15? 101dB 15.....
Is this a PJB trick? Like 16-95dB 5"?

Do tell. With pics! I gotta see this beast. Talk about GAS.

It's a pretty amazing cab. Sensitivity is [email protected](1-watt)/1-Meter. Max SPL for it is 137db. Not a lot different looking than other cabs but speaker design is new and porting is both flared and textured moving a lot more air than his previous round and shelf port designs on the Eden cabs. I've never even come close to maxing out this cab with my 800 watt amp because it just gets too dang loud. Typically run my master at 9:30. Running it at 10 o'clock indoors makes people leave.

Here's my DNS410-8 with my Eden WT500 amp hot-rodded to 400-watts @ 4 ohms per channel or 800-watts at 8 ohms bridged. I run it bridged @ 8ohms into this cab. Cab is rated for 1400-watts power handling. Tweeter Control is that dial that is located on the upper right of the face. This picture was taken when I first got it in April of 2015 but it's still the same way I run it.

 

[Rip Van Dan]

I believe 2.83V translates to 2 watts at 4Ω.

2.83v is the definition of 1-wattt.

 

[sinewave]

2.83v is the definition of 1-wattt.

Yes with a 8 ohm load but this was 4 ohms.

And of course it depends on whether it was tube watts, and especially 'RMS watts' which are bigger

 

[agedhorse]

2.83v is the definition of 1-wattt.

No sir, it is not.

2.83V into 8 ohms is 1W
2.83V into 4 ohms is 2W
2.83V into 2 ohms is 4W

 

[Old Garage-Bander]

No sir, it is not.

2.83V into 8 ohms is 1W
2.83V into 4 ohms is 2W
2.83V into 2 ohms is 4W

Those are the same numbers I got when I used the Ohm's Law calculator that I Googled on the Internet!

How is it that people put incorrect information like this on the Internet, when that same Internet will easily give them the correct answer just for the asking?

Maybe they think it's Ohm's Opinion, or a Magic Eight Ball?
"Ask again later."

 

[Hoochie Coochie Man]

Those are the same numbers I got when I used the Ohm's Law calculator that I Googled on the Internet!

How is it that people put incorrect information like this on the Internet, when that same Internet will easily give them the correct answer just for the asking?

Maybe they think it's Ohm's Opinion, or a Magic Eight Ball?
"Ask again later."

The 16th President of our United States of America, (Abraham Lincoln) posted on his Facebook page recently that it is unwise to believe everything that you read on the Internet.

 

[Old Garage-Bander]

The 16th President of our United States of America, (Abraham Lincoln) posted on his Facebook page recently that it is unwise to believe everything that you read on the Internet.

The Internet was very slow back then... V E R Y slowwww.
The advantage was that not too much misinformation got posted.

Didn't Lincoln have to do his homework using a piece of coal to enter data on to an iShovel?

 

[Hoochie Coochie Man]

The Internet was very slow back then... V E R Y slowwww.
The advantage was that not too much misinformation got posted.

Didn't Lincoln have to do his homework using a piece of coal to enter data on to an iShovel?

Before dial-up, data packets were delivered by mule, pony express, carrier pigeon, steam train, and Western Union telegraph.

(I actually have worked as a technician on Western Electric telephone relay switchgear, in the "olden days" and also helped design a piece of equipment used by Western Union to transmit international telegrams by way of ascii code).

 

[Rick James]

Nordschow has been making that same 106 db sensitivity claim for a 4x10 since back in the Eden days. It's just as false now as it was then. 106dB sensitivity at 1,000 hz is possible, or at 2,000 hz. At 100 hz and lower it can't be done with a sealed or ported 4x10. It can be done by a 1x10, but only if horn loaded, and it would be one mighty big cab.

Max SPL for it is 137db.

That's even more false than the 106 db sensitivity claim. It assumes that the cab will take that 1400 watts with linear output compared to 1 watt. No speaker in the world has linear output with respect to increased input power, it's impossible due to both mechanical and electrical driver compression.

 

[Rip Van Dan]

No sir, it is not.

2.83V into 8 ohms is 1W
2.83V into 4 ohms is 2W
2.83V into 2 ohms is 4W

Sorry 'bout that. I stand corrected! At least I had it right for the 8 ohm.

 

[agedhorse]

Nordschow has been making that same 106 db sensitivity claim for a 4x10 since back in the Eden days. It's just as false now as it was then. 106dB sensitivity at 1,000 hz is possible, or at 2,000 hz. At 100 hz and lower it can't be done with a sealed or ported 4x10. It can be done by a 1x10, but only if horn loaded, and it would be one mighty big cab.
That's even more false than the 106 db sensitivity claim. It assumes that the cab will take that 1400 watts with linear output compared to 1 watt. No speaker in the world has linear output with respect to increased input power, it's impossible due to both mechanical and electrical driver compression.

See. Rick and I can agree on something

 

[BadExample]

Will a 500 watt head sound as good as a 1500 watt head running a 1200w cab or 2000w full stack? Will a 1500w head sound as good as a 500w head with a 500w cab? Or will it break it?

Oh, wee gwasshoppa, you rill know when you are to know. You are to know when the music stops.

So you're saying, there IS a chance?

Well babies sell for what? $50K? They get worth much less as they age. I think the big boys can afford $50K or less I'm assuming that's per system. Per driver, well, that could get too expensive.