Tekton Double Impacts

Cal3713, thanks for the additional info.  I read through the nicely detailed description of the Coincident Pure Reference Extreme speakers at the Coincident website, and I have the following comments regarding the possibilities you mentioned:

1)I would absolutely rule out the idea of passively biamping the speakers, with your Franks handling the mid/tweeter section.  Given that the mid/tweeter section handles frequencies as low as 110 Hz, and does not even electrically roll off frequencies below that, that approach wouldn't accomplish anything.

2)Active biamping doesn't seem too appealing, either.  You would have to use an active crossover ahead of the two amps with the crossover frequency adjusted to be somewhere in the middle of the range handled by the midrange driver (110 Hz to 4 kHz), which would seem likely to compromise the coherency of the mid/tweeter section which Israel touts as one of the speaker's main features.

3)If the Franks weren't powerful enough for your purposes with the PREs (94 db/1 watt/1 meter/impedance 8 ohms nominal, never below 6 or above 10 ohms, and no difficult phase angles), I would not expect them to be powerful enough for your purposes with the DIs (98.8 db/2.83 volts/1 meter/4 ohms, which corresponds to 95.8 db/1 watt/1 meter/4 ohms, with a mismatch to your amplifier's 8 ohm tap).

4)So my feeling is that **if** you are happy with the PREs aside from the power issue with the Franks, I would simply look for a more powerful amp.

Best regards,
-- Al
 

So there is a difference between 2.83 volts/ 1 meter and 1 watt/ 1 meter. Thanks for the calculation Al. Since speakers are listed both ways on the Tekton site I figured they were two different measurement that meant the same thing......i.e. that 2.83 volts equalled 1 watt. 

 I'm surprised the 8 watt Frank's wouldn't be enough to drive the DI's. Forgive my ignorance but if I, and others, are driving the DI's with the 1 watt MZ2 wouldn't the Frank's drive them easily.....or is the impedence mismatch too much of an issue? I only ask as the Frank's are an option I'm considering should I decide to add an amp and can fit them into my budget. I think I can order the Frank's with 4&8 ohm taps which would eliminate any impedence mismatch. 

@almarg Ha, no, thank you Al.  As always, great information.  The Franks just provided very little bass output on the PREs.  My Super Eclipses (2 8" woofers going down to 28Hz) provided way more bass than the PREs (2 12" woofers going down to 20Hz).  Unfortunately I never got to make a real decision about how much I liked the PREs since they always sounded unbalanced without any real bass output.  

I was considering passive bi-amping because it just felt like limitation was just with the Franks driving the subwoofer units.  

Anyway, sorry for moving the conversation outside the DI topic.  I appreciate all the useful commentary... great thread.

mac48025,

Al and grannyring are spot one with their advice,

I have measured my DI speakers in room and I got,
95.3 db with a 1 watt input at a distance of 1 meter at the industry standard frequency of 1 K.
 
Even though both of us have definitely enjoyed the 1 watt of our MZ2S driving our DI's It's just not enough pwr for me overall considering my room size,types of music,and volume levels.

I got some new tubes for my Yamamoto Ao9's which is a 8 watt per channel 300b pwr amp for those who aren't familiar with it.So in the next few days I will be seeing for myself how it does with my DI's in place of my Zotl40.

Speaker and amp pairing is highly subjective as grannyring mentioned and It's up to the individual to find his or hers cup of tea so to speak.

Kenny.