Biwired-Dunlavy V- Bass reduced why?

You definitely do not want to use jumpers when you bi-wire. Speakers that are designed to be bi-wired sound much better when you run them that way. With speakers that just have a second set of terminals, it makes little or no difference. The Dunlavys were designed to be bi-wired. One of the benefits is that bi-wiring bypasses certain components in the crossover, which increases transparency and might also improve dynamics. In any case, don't use jumpers.

Thanks 9rw. I looked in past threads but could not find much onfo on Biwiring 'crossover mechanism' but did not find enough info.

I played with my upstairs Dunlavy IV (easily accessible) which i use with jumpers and lower terminals. Since hi and low pass terminals are not labled, I experimented. I removed jumpers and hooked speaker cables to lower terminal only, thinking that only woofers will sound but no sound came out at all. Similarly I hooked speakers cables to upper terminals only thinking that mids and highs will produce sound, but once again no sound came out!!

So how does the crossovers (high and low pass) works with biwired cable without jumpers? Does two pair of cables connected to upper and lower terminal acts as jumpers thru amp connection at the other end?

Which terminal are high pass and which ones are the low pass?

Thanks.

i suggest you try a jumpered, single-wire configuration with your new cables and see if that makes any difference in the bass. This means you put the jumpers in and connect both + leads to one of the speaker's + terminals and both - leads to one of the - terminals. This should help you diagnose whether it is the cable or the biwiring that is giving you less bass than you used to have.

Your experience with trying just the one set at a time and not getting any sound at all is curious.

Nil
As Bob mentions cables do have a break in time .....

On a second line of thought are the speaker cables the only change made recently to your system?

Maybe in the meantime you can change speaker position to "recover" some bass if willing to wait for the break in period and hope for the best.
Regards

Try using one set of cables with the jumper. If it's the same problem, it may be that the cables are built that way. Some may call them defective....

Try using your old cables on the low pass.

This is the way that I have mine set up: Anti-Cables go to low and high pass. 99.9% pure silver cables go to high pass. It gives me the best of both worlds.

Good luck!