Problem Solvers Needed-Got my New XOs installed and am worried....

Unhook tweeters from the network use a multimeter to test DC of tweeters to see if coils are open this would be the 1st thing I would try. Next, I would continuity test network to see if it has an issue even experts can mess up. Both are easy to do and if you don't know how too many youtube videos on doing so, multimeters are cheap so get one if you don't have one already.

Chorus, I am a master with a soldering iron but my knowledge of electronics engineering is.....limited. I can design a cross over which is pretty straight forward in most cases. Dahlquist DQ 10 excepted. It sounds like the difference is beyond anything that break in might overcome. It is also possible the speakers are actually more accurate now and you are just use to listening to the way they were. You could only tell by measuring the loudspeakers. You will have to review thw schematic and the crossover to tell if the math is right and there are no mistakes. Tannoy wisely gave you the flexibility to adjust the speakers for various amplifiers and room conditions and they did it brilliantly with jumpers. I would have maintained that system at least until you knew exactly how you liked them. But, then what happens when you change rooms or amplifiers?

Two categories of audio "improvement" have 95% of all the total audio misrepresentation attached to them. Wires and capacitors. I mainly fiddle with older Klipsch and new speakers I build for myself and have found a couple of things to be true in my world. A conductor of proper size works just fine and the 12 zip cord I use handles 600 seat theater setups with complete fidelity and no loss. Capacitors do get old and the ESR generally is what drifts out of spec over time. I recap all those crossovers now using Audyn red label or Dayton 1% polypropylene caps. Now there are a ton of people who swear by various expensive caps, especially those who sell them and fru fru fancy crossover builds, but the reality is they are adding distortion to flavor things in a way they like. I use neutral good measuring caps and add flavor other ways if I must.

  If you liked them when you first got them years ago then caps would be my first suspect for degraded sound today.

Hi chorus, some good info supplied and also some not so good. There appears to be a means of adjusting the overall balance of sound with jumpers and something there might be the cause of your problem. What is not the cause is break-in. Initially the components may sound a little off but will not be responsible for lack of top end, something else is.

I agree with the suggestions to contact the supplier. If you were supplied a bag of parts he should provide after sales assistance. Measuring 1 ohm is wrong with a Tannoy. I suspect an error.

An XO rebuilt should immediately sound better than before if properly done and then will improve a little over time. Generally this involves not changing the circuit's component values, simply replacing the parts. I have upgraded many XOs from a variety of speakers and the results have always been great.

I can get as technical as you like but without before and after schematics it's guesswork.

erik squires warns against capacitor ESR (equivalent series resistance) and says it can significantly alter the sound.  Take no notice as this is a non-issue. ESR comes into play at radio frequencies not audio. What the cap does in an XO is to set the frequency, it is capacitive reactance that is important and the formula for this does not take into consideration any resistance. Xc = 1/2 Pi fc

As you can see: There is no R in the equation. Linkwitz, Dickerson and D'appolito know what they are doing.

The above person also said go to Troels Graveson for info. I suggest you read up on XO design from the 3 gentlemen I mentioned who are true experts in the field. In fact Linkwitz is famous for his contribution to the well known Linkwitz-Riley XO. Graveson does not acknowledge inductor orientation which from experience makes a difference. Lots of top end speakers don't seem to bother because mounting them the correct way is awkward and therefore expensive to do properly. I have worked on some B &W speakers with coils all over the place.

To end off, unless the XO was incorrectly assembled, the guy who sold you the XO should refund you or endeavor to help with your problem. I wish you luck.