meade's sub

[grizzleyadams69]

Aluminum coils are lighter weight than copper and thus can be more efficient.

Copper can dissipate heat a lil better and thus can take a bit more current.

As far as musicality to your ears, you will most likely never hear a difference.

i like blunt, straight forward answers. thank you Ed

[Forevrbumpn]

I hear a pretty noticeable difference, copper always has a lower Fs, and usually gains Bl, so usually sounds better in sealed, or smaller ported boxes due to added weight, and Bl

But I thought copper had less heat dissipation? thats why aluminum was better for that purpose?

its been about 4-5 years since we tested at the shop power testing, so Iam kind of rusty on copper/alum side by side testing

But I personally like the copper coil sound better

SMD woofer wont be copper at all anyways- is it?

[Rose-Villian]

Ive Seen The FINAL Product of the SMD Woofer... and ITS FU(KIN SEXY!!!!!!

Lets Just Say People WILL be like " WHAT THE FU(K"

Edited August 4, 2009 by Rose-Villian

[HHR Ed]

I've always tested my copper coils at a lower temp than alum right after high powered burps.

And yes, the lower weight of the alum will change the Fs and Bl, but these are also changed by cone material and mass, former, coil size, suspension. So if all that is the same, and just the coils are different, the weight difference is so minimal, that it has barely any noticeable change on an RTA, let alone the human ear.

[Forevrbumpn]

I've always tested my copper coils at a lower temp than alum right after high powered burps.

And yes, the lower weight of the alum will change the Fs and Bl, but these are also changed by cone material and mass, former, coil size, suspension. So if all that is the same, and just the coils are different, the weight difference is so minimal, that it has barely any noticeable change on an RTA, let alone the human ear.

I understand doing copper coils is a mass issue, causing a lower Fs, but even if you weigh all components, and add mass difference from coppers weight to aluminums weight, the alum still has a higher Fs

Average aluminum coil sub I build, whether its a single spider or quad spider ranges from 36-45hz Fs

Copper coils I use, same height, 2" comparable gauge single to quad spider is from 20hz to 30hz

I have a bunch of copper clad coils, for me these coils work best in all aspects, but the price is crazy on custom orders

copper clad keeps the characteristics of aluminum usually, over copper

Since I build speakers on my own now, I need to do my own testing, over testing for someone else like I used to

[grizzleyadams69]

well i dont even know what fs and bl means and what role they play in a subwoofers sound. could someone explain for me?

[Jville140db]

I've always tested my copper coils at a lower temp than alum right after high powered burps.

And yes, the lower weight of the alum will change the Fs and Bl, but these are also changed by cone material and mass, former, coil size, suspension. So if all that is the same, and just the coils are different, the weight difference is so minimal, that it has barely any noticeable change on an RTA, let alone the human ear.

but it does have to do with coils most alum coils are will have more resistance which means they are prone to power build up and most are flatwind coils which will have a smaller gap than the round copper so therefore the alum will and could peak easy due to power build up and smaller gap and the copper should handle more power given the material but may have a more linear response due to the how fast the electrical power can respond through the coil and the fact that their is a slightly bigger gap at some points in the coil windings

[HHR Ed]

I understand doing copper coils is a mass issue, causing a lower Fs, but even if you weigh all components, and add mass difference from coppers weight to aluminums weight, the alum still has a higher Fs

Average aluminum coil sub I build, whether its a single spider or quad spider ranges from 36-45hz Fs

Copper coils I use, same height, 2" comparable gauge single to quad spider is from 20hz to 30hz

I have a bunch of copper clad coils, for me these coils work best in all aspects, but the price is crazy on custom orders

copper clad keeps the characteristics of aluminum usually, over copper

Since I build speakers on my own now, I need to do my own testing, over testing for someone else like I used to

The Fs range is what we have been seeing on our new TSS/T2000 subs, which all have copper coils.

Aluminum just hasnt seemed worth it seeing as how our power handling and efficiency is exceeding what we targeted at.

But I have not tested with Copper clad, or Titanium. I would be interested to see the advantages of these over the copper we use.

What material cone does the SMD woofer use?

I have played with Aluminum coil subs with carbon cones and I wasnt pleased with the SQ.

[Rose-Villian]

The Fs range is what we have been seeing on our new TSS/T2000 subs, which all have copper coils.

Aluminum just hasnt seemed worth it seeing as how our power handling and efficiency is exceeding what we targeted at.

But I have not tested with Copper clad, or Titanium. I would be interested to see the advantages of these over the copper we use.

What material cone does the SMD woofer use?

I have played with Aluminum coil subs with carbon cones and I wasnt pleased with the SQ.

I wanna Say the Same Material that is used now... Thats The way it Looked

[HHR Ed]

but it does have to do with coils most alum coils are will have more resistance which means they are prone to power build up and most are flatwind coils which will have a smaller gap than the round copper so therefore the alum will and could peak easy due to power build up and smaller gap and the copper should handle more power given the material but may have a more linear response due to the how fast the electrical power can respond through the coil and the fact that their is a slightly bigger gap at some points in the coil windings

The copper coils and aluminum coils I was testing were both flatwound and of the same size. Both in the same motor so gap size was the same.

All was equal except the coil material.

The copper did peak in SPL at 2hz lower than the aluminum. and was .1 db louder. average over all tests.

Copper does have better thermal conductivity than aluminum, but aluminum has a lower mass, which is supped to let it expel heat faster.

I was thinking that the reason why my IR thermometer was reading aluminum as 5-10 deg hotter was because of the ambient air being more warmed up.

But the impedance rise went up more on the second and third burps on the aluminum coil as compared to the copper.

This is usually due to increased heat and electrical resistance and decreased efficiency and power.