Alexander

Found a nice pair of Chorus II's in oak for $750. Please talk me out of them

Care to share what you will be using? I do understand that there will be some cap brands/models that will be better than others - even at a lower price point for the "same cap" . It is just that some of us have not learn the secret of what is what yet. That is were we green horns call on you guys in hopes for a bit of guidance.

Remember I have lowly forte II's and in the ALK network being built we use a bunch more component's than an OEM network. It does bring up yet another question - in a basic "re cap" of an OEM network, re using all of the remanding components - would one still pursue say Audyn Plus caps? This may vary I would guess with say a La Scala vs a Heresy II. In this case of my forte II's we would need 4 x 1.5uF, 2x 2.0uF and something for the 2x 110uF NPE's None the less I will be going to go the Audyn Plus route after some time with the Standard Zcaps I already have. Looking around they are about 3x the cost of the Jantzens but is doable in time. And yes there are also caps out there with well over $100 price tag per piece.

Not mine, just thought I pass this along - 1980 + 1978 Heresy's https://tricities.craigslist.org/ele/d/2-pairs-klipsch-heresy/6445580944.html

About a year ago I picked up a set of forte II's and Tangent 5000's for $600 for both pairs. Both cabinets were a little rough but not bad. It did take a while to find forte I or II in my area at the time but if you stay at it they will show up at a decent price. I place the value of $400 for the forte II's and $200 for the T-5000's.

I should have said "poly/film" rather than "polys"

So in theory the high end polys that have voltage ratings up there in 600-1200v will never get to cleared? lol I vote the government start an affirmative action for us less financially fortunate so that we too could have many hundreds of dollars in cross over components.

Anyone? This question (and others) are not meant to be exclusive to Deang alone.

Yea, the Jantzen z-caps took 3.6 & 3.9uF but the Audyn Plus will take .68 & 6.8uF to get that value. This raises the question - were is the point of diminishing returns with cap or coil values? Thus far I have focused more on matching "pairs" rather than the exact value but how far should one go to match a schematic value at this level?

Stay with the present Solen 27uF? I do have the z-caps for that value now - or is there nothing significant at that point up stream in the hi pass filter? Will be using the Jantzen in the 2.2/7.5's spots for now as I have them but will consider giving the Audyn Plus 2.2/7.5's a go when the money recovers a bit.

The speakers sound great, just wanting to experiment to see if they could be made even better. Not going to say I will never use the Audyn Plus caps , just that $260 for the values needed is out of my price range right now. The Jantzen z-cap standard I currently have cost $66 shipped - was this worth the money changing out the Solen caps? The jury is still out and as yet to be tried out. 2.2uF x4 7.5 uF x2 27uF x2 Parts Express Audyn Plus caps 　 The foil coils I was looking at were ERSE - $92 for the values I need + $76 if I were to replace the inductors in the low pass section (not likely at this time anyway if I were). .2 mH x2 .3 mH x2 1.6 mH x2 2.0 mH x2 (low pass) 　ERSE copper foil inductors kind of a cheap shot with the Dayton/Bennic comment don't you think?

Just curious if any of you folks having such a better understanding than I may ever be able to grasp if there would any reason not to use Dayton caps to replace the mylar & ENP caps in the low pass section? Also would there be anything better than say, a sledgehammer coil short of going to foil in the same low pass?

embarrassing - too low wattage iron damaging a few components

To be fair to the design I had issues with one of the boards at first and though it was fixed I question my work (was my first shot at this stuff). So that is why we are starting over.

Having read in another thread how ALK removes the LF VC inductance value from the low pass coil value and that it is not the industry norm. So should we consider "putting it back" into the low pass coil value if using one of his designs? In my case the forte II has a 2.0 mH listed and one would add back the .66mH so say replace the 2.0mH with say a 2.7mH?

Those Audyn Plus caps are too rich for my blood at this time, perhaps down the road. Besides, I sense the forte I/II's wouldn't warrant such a class of caps unlike the Heresys or, Cornwall and above models.

No efzauner, have never heard of the forte's having such an issue with any part of the cabinet. I am getting ready to upgrade the ALK forte II xovers with a bit better caps, going to replace the Solens from the original ALK parts list to Jantzen standard z-caps. Will also be using some left over Daytons to replace the NPE & Mylar caps. This new version will also have the ability to run bi amping if I wanted to do at some point. The "first gen" ALK forte II so to speak made the speakers sound as if you had removed the grilles might be the best way for me to describe it. We will see if we improve on this with the new caps, the z-caps are not a very large jump from the Solen pieces I've been told.

There are #16 .20 & .30mH Litz coils and a solid #20 1.6mH used on the high pass as per ALK's parts list. I will be re-purposing some old Dayton 18 & 33uF caps to replace the low pass NPE and mylar counter parts. bellow is a refresher on what this build is. Note: the 36uF has since been changed to 33uF by ALK.

I have started looking at foil/copper inductors to replace my standard air and steel units in the ALK forte II x over. I admit we are probably talking about the lower end of the scale of ERSE & Jantzen to name just a couple of company's that have been looked at. I found a deal on Jantzen z-caps standard so will replace the Solen caps to see what/if difference they may make. This leads me to the topic above, is there any likelihood that upgrading all of the Solen 20ga air coils and 15ga Sledgehammer steel inductors to entry level 16ga 1.6mh,.20mh, .30mh & 14ga 2.0mh worth even considering? I realize this all is very subjective but I do value input from others experiences.

Thanks gents. It is a bit clearer now than it was.

Well we have had a bit of time listening to the t500's and the wife said unprompted that they are sounding "creamier". I would agree that they sound smoother.

Thanks Geoff, it will be a bit of time before I could build something like that from scratch.

k75k, k53k & k28k individual impedance plots. Note: k28k is in factory installed configuration in this test and stock diaphragms used to both tweeter and mid.. Will add k75k with ti diaphragm, k61k and k25k in the next few weeks.

Here are a few things I understand, but very rusty: In pure reactance (X) a cap will have current leading voltage by 90* and inductance has voltage leading current by the opposite 90* so this is why we have the phase shifts in a RC,RL or LCR x-over. Efficiency is reduced with a phase shift (70.7%?).

Thanks mboxler, I have read that thread and it has helped, I did build the forte ii version of that x-over and will be updating some of the components that were used in the first build next