JAM by Duelund


Has anyone tried these new reasonably priced tinned copper caps from Duelund in any positions?

Cheers

S
shertzy
I really don’t know that speaker at all.  Looked st some online stuff on them, but not much available.  Did you already mod them? Placed the crossover outboard? 
Dear @grannyring : Yes " heavy " moded, here about:

ADS L 2030: This is a Full Range Professional Monitor that I own for many years.

These L 2030 was designed by Mike Kelly ( Aerial speakers ) and till today it match all my priorities.

It is " heavy " tweaked to do that: first it has " three hands " ( internally ) of a insulation/antivibrational treatment ( like a white paint. I can't remember the ingredients. ) from Acoustical Magic Company ( it works marvelous ) inside all the box ( a big one box: 58-5/8" ( H ) x 27-1/4" (W) x 13-1/8" (D) ).

It is internally hard wired with Silver Oval by Analysis Plus cable and KCAG by Kimber Kable.

I take out the crossover ( now is external ) and change all the parts: resistors ( Duelum. ), silver air core solid ribbon ( 5.5 cms. of pure silver. Almost 2kg. of silver in the biguest one. ) inductors ,  by-pass teflon caps, etc, etc, the speakers cables goes soldered directly to the crossover parts. This speaker crossover is hard-wired.

In reality are three separate/stand alone crossovers: one for the tweeter, one for the midrange and the other for the woofer, all these hard-wired directly to the amps ( no connectors. )

I'm only not biamp my system ( with the subs. ) but these ADS main/satellite speakers are true tri-wired in hard-wire directly to each crossover parts in the three way speaker design all the way down to the amplifier output.

I change the internal damping glass fiber by 10kg ( each one ) of long hair 100% virgin wool and change the fabric cloth of the grille for a " transparent one ".

These L 2030 have: One acoustic suspension 1" silk dome tweeter, one main acoustic suspension 2" silk dome midrange, three auxiliar acoustic suspension 2" silk dome midranges ( similar to the main midrange but with a less powerful magnet. ) and two long-excursion acoustic suspension ( sealed. ) paper 14" woofers.

These are exceptional drivers especially the tweeter/main midrange ones.

These are some manufacturer specs:

- Frecuency response: 22-20K +.- 3 db ; 18-28K +.- 5db.

-Efficiency: 95 db SPL.

- Power rating: 300 watts nominal; 1,200 peak.

Weight: 95kg.


Back external tweeters:

These ones was a spare tweeters from a Dalquihst DQM-9 that I owned and already sold.

These tweeters are 1" silk dome ( same efficiency that the front ones ) and are connected in phase with the front ones and works with his own crossover ( with by-pass Teflon cap. ) at around 7k and up and have, too, an off/on switch.


As I told you  the high pass filter is made it inside each 20.6 ML monobloks.


Probably I can use the Sonicaps Platinum or perhaps Jupiter or something else but because I'm restricted on money I need your advise about.

Thank's in advance.

R.

Dear @grannyring : I think that step by step I will go for caps that I already know are really good as the Teflon Cu and/or Sonicap Platinum, first with the speaker tweeter crossover after that with the midrange one.

Now, I need advice on what cap is the best for  the woofer 100 uf cap and the value of the cap to by-pass it.

Can you help about?

Thank's in advance.

R.
Hi @grannyring ,

Does a capacitor quality in the 2nd order speakers LPF make a big difference?
If yes, Which producer and type can you recommend (I need 8uF)?
Do you like Jupiter VT?

Regards,
Alex. 
Have anybody tried to use Duelund JAM for bypassing electrolytic capacitors in power supply?