How are you? For HK990,How to do bi-wiring connection of the speakers? thanks

HI, this receiver does not have an option to Bi-amp speakers. Thank you, Onkyo USA

Bi-wiring basically works wtih one amp. You need a crossover network and a signal doubler to use two amps (bi-amping). There are many diffent ways to bi-amp (horizontal, vertical,...) This link: - -http://www.soundstage.com/synergize/synergize031998.htm-- explains them all. Bi amping is usually not worth the extra price and complexity when used on smaller speakers.

You can use a piece of speaker wire to replace the missing bar. those speakers are designed to be used with the bars in place for normal use. they can be removed if you are bi-amp/bi-wireing them.

These are bi amp capable speakers...if you have the jumper in place (connects top and bottom terminals together) it's set up for standard full range connection - you can use either set. If the jumper is not in place, it's set up for bi amp which means you would connect your low frequency wire to the bottom terminals, and the high frequency wire to the upper terminals.

Yes, the two sets of terminals are for the tweeter and bass driver.

When you bi-wire you want the low frequencies to go only to the bass driver and the high frequencies to go to the tweeter..

Please see this link for more information:
http://www.brilliancehifi.co.uk/how-to-bi-wire-speakers.htm

Please rate my answer if you find this useful.

Thanks,

Chris

Absolutely remove them for bi-amp or bi-wiring.

bi-wiring requires the removal of the copper jumpers between the hi and low speaker terminals. you can use two wire pairs twisted together at amp out connections and the four separate ends at each speaker, but the quality of sound will not be as good as buying quality bi-wire cables. But a pair of quality single set of wires at each speaker would be fine, but put jumpers back on and attach to the top terminals, they are designed that way. bi-wiring does allow the crossover to put out a little better sound. Hooking up four sets of wires to the a and b speaker terminals sounds bad. i have had alot of trouble with my rti10's and learned the hard way that it is best to pay more for wires with quality terminations.

Remove the bridging links from the speaker terminals and run two equal lengths of speaker wire from the amp to the speaker. At the amp - speaker terminal, twist two of the same wires together. ( normally marked with a tracer color) Connect these into your left speaker output - terminal and tighten. Connect the two wires to both the negative terminals on the speaker. Repeat the same for the + side. Make sure wires are not shorting across the terminals.

You can at a minimum, bi-wire your speakers by wiring the speakers with the A and B speaker outputs. The A speaker outputs end up running the tweeters and the B will end up powering the woofers.