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Biamping RM2's

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hifiwannabe

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Biamping RM2's
« on: 25 May 2003, 03:06 pm »
Hello,
I have just recieved my set of RM2 kits. I wish to biamp them, with tube amplification on the ribbons and a large solid state amplifier for the woofers. I have on order a Marchand XM26 2-way tube type electronic crossover. What crossover slopes and frequencies should I use for the woofer to midrange crossover? I can set the Marchand up for 6,12,18 or 24 db slopes and can stagger crossover points. I intend to use the supplied passive crossover for the mid to HET tweeter crossover.
Thanks in advance!
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Tyson

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  • Audio - It's all a big fake.
Biamping RM2's
« Reply #1 on: 25 May 2003, 05:00 pm »
24db is what you want.  It will reverse phase 180 degrees, so if you flip the leads for the mids/highs, you will preserve phase coherency.
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mgalusha

Biamping RM2's
« Reply #2 on: 26 May 2003, 03:28 am »
Actually the 4th order crossovers cause a 360 degree phase shift.  2nd order crossovers cause a 180 degree phase shift. :)
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James Romeyn

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  • James Romeyn Music and Audio, LLC
    • James Romeyn Music and Audio, LLC
Biamping RM2's
« Reply #3 on: 27 May 2003, 11:30 pm »
Bypass the passive internal LP XO.   Use 24dB LP, around 150Hz or thereabouts, tune by ear.  24dB shifts 360 above the hinge, 0 below.  Leave all polarities normal.  For HP, use the active 6dB at 166Hz, in conjuction with the passive internal XO, as per my biamp document sent earlier.
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