Aq hdc4???

[sundownz Pro Seller]

IIRC most manufacturers(at least the popular underground ones that I can think of) rate their subs based on continuous power handling for a given amount of time. So unless you're playing pure sine waves, you can theoretically play music with a good deal more power on tap in order to feed it more power during the musical peaks in the song, so long as you're not pushing it past mechanical limits.

I've started to test all of our drivers on a 60 Hz sine wave test... they must pass at LEAST 5 minutes at rated power, clamped, to receive a given rating. Being 60 Hz it's pretty brutal as excursion is quite low. All drivers to come from us from here on out will have passed this test and still be fully functional.

I've already used the data to improve a product I'm releasing next year -- I upgraded to a higher temperature coil as the driver actually did pass the test initially but the coil adhesive was damaged and it failed soon after on music. Very useful data, IMO.

 

[RAM_Designs 5,000+ posts]

I've started to test all of our drivers on a 60 Hz sine wave test... they must pass at LEAST 5 minutes at rated power, clamped, to receive a given rating. Being 60 Hz it's pretty brutal as excursion is quite low. All drivers to come from us from here on out will have passed this test and still be fully functional.
I've already used the data to improve a product I'm releasing next year -- I upgraded to a higher temperature coil as the driver actually did pass the test initially but the coil adhesive was damaged and it failed soon after on music. Very useful data, IMO.

Thanks for the info Jacob, I knew you did some sort of continuous power testing.

 

[wenn_du_weinst 10+ year member]

I see alot of stupid ****ers in this thread

power handling means jack shit, you go ahead and run your 5000 pound coils in your subs and watch me walk on by with less power

 

[Papermaker85 5,000+ posts]

you just don't understand how reactive loads work.. MMS is only a portion of the story.. as stated some times in some classes pure B/L is more important but thats rarely the case.. the higher b/l might be from more smaller windings which runs into power compression faster.. the less efficient driver might just need a bigger box higher tune or more port area.. when you change CMS/QE and FS the box is going to vary its response..

i don't recommend using a 15 with a 87 1w1m rating if your getting 1200 to it in you class and others are getting 1500. here you want a low MMS woofer with alot of B/L and enought surface area to rid the heat.. when your building a woofer that is going to be in unlimited power classes or classes where your getting 3-4+k to the coils your approaching the limits of powerhandling on just about any design so cooling becomes very important.. for example the 9500s didn't get stronger motors, for years they increased cooling and constantly gained from it..

not knocking anyone but take for example the DD z series..

 

[Papermaker85 5,000+ posts]

I've started to test all of our drivers on a 60 Hz sine wave test... they must pass at LEAST 5 minutes at rated power, clamped, to receive a given rating. Being 60 Hz it's pretty brutal as excursion is quite low. All drivers to come from us from here on out will have passed this test and still be fully functional.
I've already used the data to improve a product I'm releasing next year -- I upgraded to a higher temperature coil as the driver actually did pass the test initially but the coil adhesive was damaged and it failed soon after on music. Very useful data, IMO.

honestly if you want to get the best results use the frequency in which impedance is lowest regardless of excursion..

just because its not moving as much excursion wise does mean its not replacing/moving the air Faster..

but my real point was we know you do your homework..

speaking i like the new zv2 but i failed to understand why you have such a high Fs, care to explain? i was under the assumption this was your SQL driver..

 

[Popwarhomie 5,000+ posts]

Ill take 2 in 10"s //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

I agree the motor is ugly though.

Ive had 2 HDC3 10"s and an HDC3 18". I had my 2 10"s on a 3500D and they took it easily.

Much better!

 

[Papermaker85 5,000+ posts]

why 10s? i like larger drivers for the awe factor..

 

[Popwarhomie 5,000+ posts]

why 10s? i like larger drivers for the awe factor..

Regular cab truck. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[05fronty 5,000+ posts]

anyone know if he is gonna redo all the subs?

 

[RAM_Designs 5,000+ posts]

What's so ugly about the motor?

 

[AllenH427 10+ year member]

Impatiently waiting for a release date DJ. Give us a hint, what month?

 

[sundownz Pro Seller]

honestly if you want to get the best results use the frequency in which impedance is lowest regardless of excursion..just because its not moving as much excursion wise does mean its not replacing/moving the air Faster..

but my real point was we know you do your homework..

speaking i like the new zv2 but i failed to understand why you have such a high Fs, care to explain? i was under the assumption this was your SQL driver..

Simple... first iteration had a super light 4-layer flat aluminum coil and a suspension designed to handle what customers typically do to a driver rated at 1500-watts RMS (meaning they want to put 3k+ amps on it). Relatively stiff spider + Low MMS = Higher Fs. With a softer suspension, regardless of the rating, it would have resulted in drivers being damaged mechanically. It's the reality of car audio -- doesn't matter what the rating is, the suspension has to pretty well handle 2x whatever you say.

Second iteration -- and what we currently offer uses a copper coil, TS specs here :

Sundown Z v.2 Copper Coil T/S Specs - Car Audio Classifieds

I like the result a bit better with the copper... also a bit more rugged coil in my tests. In my SPL testing also did the same numbers per watt up to 6k and actually jumped ahead over 6k power.

 

[Ronny 10+ year member]

This woofer looks like a little ***** //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif