McIntosh MC1.2K or MC1.25K with ML

[peacefulcargo]

Hi have any of you used these 1000W power amps with Martin Logan? Views would be great. Thanks

[McMan]

Great question! If anyone could elaborate on the differences between the two amps that would also be helpful to lurkers like me.

[max1]

I'm sure the 1.2k is an amazing unit unfortunately, I have not heard them, but I do have a pair of 1.25k's running my ML Renaissance's. Love the match.

[Charles]

Originally Posted by McMan

Great question! If anyone could elaborate on the differences between the two amps that would also be helpful to lurkers like me.

I bought my 1.2's when the 601's came out. Although the 601 was a much newer design, I was told I was told the 1.2 would "smoke" it. I kept them for about 5-6 years. I have no criticism of its presentation. However, it is the old Mac SS technology brought to its most refined state. This technology dates back to the MC1000, MC1201, and MC501 mono amps. These are superb amps. The 1.2KW is the "king" of them.

Beginning with the MC601 mono, the design is updated including the new Thermal Trak output transistor. I have made so many changes to my system I can't compare them, except to say the difference is not "night and day" by any stretch. The 1.25KW is slightly smoother and more refined compared to an already smooth refined SS amp. I've owned 3 1.25KW's for about 3-4 years. It's the best SS Mac amp, exception being the MC2KW which is an altogether different animal. I briefly considered a pair before buying the MC35000MKII. But it is a 15-year-old design with the old binding posts. I'm passing on the 2KW's. According to my source at Mac, the 1.25KW is just as good if not better for much less money. Hope this helps.

Best

Charles

__________________________________________________ _
Charles Updated System: Wilson McIntosh Audioquest
New gear on order: McIntosh MC3500 MK II mono power amp, one per channel; custom granite slabs to set my MC3500 MKII’s
Most recent updates: Latest is the last one posted: AQ Diamond USB replaces AQ Coffee; Wilson Audio Specialties Alexx replaced by Wilson Audio Specialties XVX Chronosonic; new subwoofer crossover; new Galaxy Grey Thors Hammer; Wilson Pedestals; heating and cooling completely reworked and reinsulated resulting in a much quieter, cooler, and more efficient room (cost about 10,000.00). McIntosh MCT 500 SACD/CD transport. Wilson Audio Acoustic Diode for XVX Chronosonic. WEL Signature digital Coaxial cable for MVP 881/D1100 digital connection replacing the optical connection. New plinth for Thor subwoofer made of X material with the Wilson Acoustic Diodes. Thor is now off my floor.
Amps: McIntosh 1.25KW’s (3) set on floor on custom made cultured marble slabs
Preamp and DAC: McIntosh D1100
Sources: McIntosh MCT500 SACD/CD Transport, MVP881 BR player, MVP851 DVD player, MR87 tuner, Marantz 510LV Laser Disc player, ASUS laptop USB (JRiver Media Center 23)
Speakers: Wilson Audio Specialties XVX Chronosonic
Sub-woofer: Wilson Audio Specialties Thor’s Hammer (1) horizontal lie and Wilson Watch Controller (abbr: WC); custom plinth of X material with Wilson Acoustic Diode feet
Cables main system: Audioquest WEL Signature speaker cables and balanced IC (preamp to amps); WEL Signature AES/EBU balanced digital IC for CD playback; WEL Signature digital coaxial cable for MVP 881/D1100 digital connection; Audioquest Diamond optical (1) for tuner, (1) for MVP 851 DVD player, and (1) for LD player for total of (3); Audioquest Diamond USB cable; McIntosh MCT cable for SACD playback; Dragon power cords (5 HC cords and 3 source cords for total of 8); Thunder HC power cord for MR87 tuner
Cables subwoofer system: Audioquest Redwood speaker cable (1); Wolf balanced subwoofer IC from WC to amp; Wind balanced IC from preamp to WC; Hurricane HC (2) and Dragon HC (1) power cords
Power conditioners: Audioquest Niagara 7000 (1) and Niagara 5000 (3); (4) dedicated 20-amp lines with no. 10 wire straight out of fuse box
Isolation: Wilson Pedestals for D1100; MVP881 BR player; MCT500 transport; MR87 tuner; plinth for Thor subwoofer made of X material with the Wilson Acoustic Diodes
Cabinet: Double Custom Woodwork & Design (CWD) solid walnut cabinet on large casters; holds all sources and preamp; also, Niagara 7000; 11 feet minimum distance from speakers
Acoustic Treatments: Room and Echo Tunes
AC: Dedicated to this room only, an ultra-high efficiency and quiet recently installed Ruud split system 3-ton heat pump.

[peacefulcargo]

Yes great insight Charles. Thanks so much.

[peacefulcargo]

Originally Posted by max1

I'm sure the 1.2k is an amazing unit unfortunately, I have not heard them, but I do have a pair of 1.25k's running my ML Renaissance's. Love the match.

Brilliant, Thanks

[John Jordan]

Good post Charles.

The 1.25's are "voiced" differently than other modern McIntosh solid state offerings. Although a bit out my my league, lots of um-mph in the low end and smoothness above.

Not having heard the 1.2's, it is my understanding the voicing is similar to the 1.25's. I believe too, there were two versions of the 1.2's. I too hope this is of some help to peacefulcargo.

Enjoy the Sounds,

John

[Mack]

The 1.2KW will play anything