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<blockquote data-quote="thylantyr" data-source="post: 1251185" data-attributes="member: 560358">The key thing to remember is the loudspeaker impedance as a whole is only a nominal value.Tweeter, midrange, woofer all 8 Ohms using a passive crossover would imply a 2.6 Ohmnominal load because of the three parallel circuits. How many 2.6 Ohm store boughtspeakers have you seen that use a single tweeter, midrange and woofer in the designusing 8 Ohm nominal drivers? none, they don&#039;t rate them for 2.6 Ohm, rather 8 Ohmnominal because the frequencies are being split up and effectively the amplifiers sees aa nominal 8 Ohm load. You can design a passive crossover with more &#039;stuff&#039; that canplace more loading on the amplifier and the crossover itself will be placing more burdenon the amplfiier and total impedance can drop.&nbsp; If your AV receiver rated for 8 Ohms drivesyour 3 way loudspeaker using three 8 Ohm drivers using passive crossovers, it worksfine it&#039;s done everyday without issue and those AV receivers aren&#039;t very robust in design,if the impedance was 2.6 Ohms the revceiver would barf. Passive crossover design canbe tricky to make an excellent one.</blockquote>

[QUOTE="thylantyr, post: 1251185, member: 560358"] The key thing to remember is the loudspeaker impedance as a whole is only a nominal value. Tweeter, midrange, woofer all 8 Ohms using a passive crossover would imply a 2.6 Ohm nominal load because of the three parallel circuits. How many 2.6 Ohm store bought speakers have you seen that use a single tweeter, midrange and woofer in the design using 8 Ohm nominal drivers? none, they don't rate them for 2.6 Ohm, rather 8 Ohm nominal because the frequencies are being split up and effectively the amplifiers sees a a nominal 8 Ohm load. You can design a passive crossover with more 'stuff' that can place more loading on the amplifier and the crossover itself will be placing more burden on the amplfiier and total impedance can drop. If your AV receiver rated for 8 Ohms drives your 3 way loudspeaker using three 8 Ohm drivers using passive crossovers, it works fine it's done everyday without issue and those AV receivers aren't very robust in design, if the impedance was 2.6 Ohms the revceiver would barf. Passive crossover design can be tricky to make an excellent one. [/QUOTE]

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