OK all you Infinity RS 1A/1B Beta speaker owners..

Not recommended......... The crossover has been
criticized (correctly) as not being up to the standard
of the rest of the speaker system. Nevertheless, it
is necessary to use some type of crossover so as not
to overdrive the mid/tweeter panels with a full-range
signal. Additionally, the crossover has the servocontrol
network for the bass towers.

Rwd,

I think you're referring to bypassing the active subwoofer control instead of the passive crossover in the base of the mid/twt columns.
Yes, this is definitely recommended. You would need a preamp with 2 sets of outputs (or a high quality Y-connector. Simply run one set of cables from the preamp to the amp (preferably tube) driving the mid/twt columns. These columns have a built-in high pass filter that rolls off the bass under 110 Hz.
Another set of cables would go from your preamp to the active sub controller and then to the bass column amplifier. Some people in the past have bypassed the high current protection diodes in the mid/twt columns and the level controls. I was never brave enough to do this.
Good luck!!!

Just a second pair of interconnect from the pre-amp direct into the power-amp of the high-mids tower.

This means that to able to do this you're pre-amp must have a second pair of pre-outs

Alex

I beg to differ - but I used to own the Beta's and I ran the mid/tweeter panels direcly from pre to power, bypassing the redundant Crossover. The Beta crossover did not have a high pass filter feeding the mid/tweeter amp - it only had lower and upper limits intended for the bass panels. The ribbon panels had their own internal passive crossovers, which prevented any deep bass information from being passed on to the EMIMs, EMITs, and the SEMIT. To this day, I never understood the design of the BETA crossover, it would have made much more sense to route that high pass filter to the mid panel outputs - I can't speak for the RS or RS 1B crossover. Just my two cents worth.

Well, here's a link to the RS1/1b tech sheet I put up on my website. Please feel free to download it if it may help you.

http://www.tiac.net/users/ltm/RS_I_technical_sheet.pdf

It appears there is a variable cap in the signal path from the inputs of the xover and the mid/high outputs. I'd think twice before I ran my RS1x mid/tweet towers directly.
Have a look at the schematic for yourselves!

I enjoyed RS1x for many years, since gone on to IRS Betas. One nice thing with the Betas is you can run direct to the mid tweets, allowing me to utilize balanced equipment!

I hope the tech sheets will help.

beemer