SET on JBL Everests - Mouse breeding an elephant?

Impedance phase angles are large at low frequencies, though, so the EPDR (equivalent peak dissipation resistance) drops to a minimum of 2.0ohm at 72Hz, and at the other end of the audible spectrum to 2.1ohm at 18.6kHz. So the DD67000 is far from being a testing amplifier load, but it isn’t a pussy cat.

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You want a serious amp. 2.1 ohm load will heat up an amp in a heart beat.. The question is how much of your music is at either end of the scale. 72 hz or 18.6khz, answer not much.

That MC452 and a single MC275. You’ll like that a WHOLE lot more than the current set up.. Maybe not quite the eye candy, but SQ wise a lot better. Get a good set of Mid/High frequency cables for the MC275, maybe OCC/Silver clad ribbons with PTFE covers. Good heavy OCC or OFC copper with PTFE covers for the bass.. 150-250.00 maybe for both pairs.. 3 meter

You already have a good set of amps..... Xtra cables ..

Invest in some good Telefunken signal valves.. 2-300.00 you're WAY better off SQ wise.. Mac and Telefunken valves go together like milk and cookies..

Enjoy..

I agree with the above post. Use the 452 for the woofers and a single 275 for mids and highs. But get an active cross-over (2 - way) to split the signal from your preamp. That way each amp is not having to see a full - range signal and will work better! I have done this myself with a bi - amp system using four speakers.

Set the active cross-over to 200 -300 hz.  Feed the lower frequencies to the 452 and connect it to the woofers via the built-in cross-over. Feed the upper frequencies to the 275 and connect it to the mids/highs via the built-in cross - over.

No need to worry about wire quality. Any good quality wire will work just fine!

Use the gain controls on the active cross-over to set the sound levels between low and high frequencies.