[Christof]

I'm pushing a pair of SP Tech Timepiece 2.1's and while the two Stereo Khartago's I'm using in vertical biamping mode are doing there best to please, and a fine job they are doing,  I'm curious if the Mono Extremes will be another animal all together?   

I'm also curious about biamping with matched stereo amps vs. mono amping.  By vertical biamping I can let the bass drivers clip if they need to and not sent nasties to the highpass but I sacrifice the summed power of a monoblock.  How do you feel the Mono Extremes would stack up to a pair of Stratos Extreme amps in vertical biamp?

Thanks
c-

[Christof]

Will there be substanially more current delivery with the Extreme's than Khartagos have to offer?

[Lkdog]

What are the specs on the speakers in terms of efficiency rating and ohm load variance?

I have a pair of ACI Jaguars which are 86db and go down to 5 ohms maybe.
7" woofers.

I was stunned as to how they sounded with the Mono Extremes versus my previous amp which was 150X2 and no slouch.
The above quote about relaxed control is accurate.
Unlimited power and it never sounds strained.
 

[Christof]

Here is a cut-n-paste of the Timepiece specs:

FREQUENCY RESPONSE   30-24,000 Hz. +/- 2dB (typically +/- 1dB). -3dB @ 29Hz & 30 kHz.
LOW FREQUENCY ATTENUATION SLOPE   24 dB per Octave below 30 Hz
LOW FREQUENCY TUNNING   Proprietary Hybrid Ported Reflex / Transmission Line
PHASE RESPONSE   Less than 360° from 100 - 24,000Hz.
GROUP DELAY RESPONSE   Less than 1mS DELAY SHIFT from 100 - 24,000 Hz.
PEAK POWER HANDLING   Greater than 1,000 WATTS (10mS)
SHORT TERM MAXIMUM POWER HANDLING   300 WATTS (I.E.C. 268-5)
LONG TERM MAXIMUM POWER HANDLING   125 WATTS (I.E.C. 268-5)
SENSITIVITY   85 dB SPL @ 1 WATT(2.83V) @ 1 Meter
IMPEDANCE   8-OHMS (nominal)
CROSSOVER   4th order symmetrical, in-phase, acoustic Linkwitz-Riley @ 600Hz.
HORIZONTAL DISPERSION   +/- 45° - 900Hz to beyond 10kHz(standard -6dB Beamwidth Limits)
VERTICAL DISPERSION   +/- 30° - 900Hz to beyond 10kHz(standard –6dB Beamwidth Limits)
MINIMUM RECOMMENDED AMPLIFIER POWER   50 WATTS RMS / Channel (200 - 750 WRMS / Ch. preferred)
LOW FREQUENCY DRIVER   (1)- 8” Aluminum Cone w/ Phase Plug & Cast Magnesium Frame
HIGH FREQUENCY DRIVER   Waveguide Loaded 1” Textile Dome - Ferrofluid Cooled
DIMENSIONS   H=21.5”(54.6 cm.) x W=12.5”(31.7 cm.) x D=15.75”(40.0 cm.)
WEIGHT   65 lbs. (29.5 kgs.)

[Lkdog]

Judging from just that information, they appear to like power and lots of it.
85 db, large 8" woofers and they must be a pretty large box.
Does not say the impedance variance and how low that dips.
The lower that goes below 4 ohms the more demand on an amp to produce power quickly.

I would call Klaus and ask him about your present setup versus Mono Extremes.
I am guessing you present amps do a great job-he would know if they would benefit from the Mono Extremes.
I would try and find out how low the ohm load dips as an important point to know.

[lonewolfny42]

Judging from just that information, they appear to like power and lots of it.

Yes.....With the SP Tech's TP's....bigger is better.

[DMi]

Much better arc welding if you happen to touch the banana plugs together.

A much larger case for heat dissipation. Needed because the mono extremes seem to be running more class A than the other models I have seen. More current for more demanding speakers. Smoother sound, more speed, detail and sound stage. The speakers will probably sound like they just gained a half octave of bass after the monos are broken in and they will be completely under control of the amps, no overshoot.

It's not about the watts so much as the current reserves.

That's the short list, I could rattle on for a while. I concur, ask Klaus for details.

Doug