Amp for Martin logan CLS Originals

Please go to my system page and, specifically, read the short history of my system (starting in 1990 when I bought the CLS II's (now IIz).

Since I strongly disagree with about 80% of the previous posts' contents, I'd rather not add to them; however if you have specific questions about my system's evolution, my choices, etc, I'd be happy to respond -- either here or offline.

Neil
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Nsgarch, I understand. Thanks for the help.

The first thing you need to understand is the original CLS is a completely different animal than the CLSII and IIz. I ran the original CLS with 60 watt tube monos and they played loud enough that snare drum wacks would make you jump. They also produced enough bass with 90 watt tube monos to jar my listening room door.

Keep in mind these speakers are not designed to be used on stands. The stands raise the speaker off the floor distancing the speaker from a critical room boundry and thereby affecting the bass in a negative way. The speaker is designed to be tilted back for proper tonal balance just like Maggies, however, the stands do not allow for this. Once the speaker has been placed on stands the tonal character and presentation has been completely altered and not for the better in my opinion.

Rrog, your information is incorrect. If you'll send me your email, I will scan/attach a copy of a MartinLogan factory memo to CLS owners dated Feb. 12, 1992. Among other things, the factory recommends (and explains the reasons for) the use of Arcici stands, co-developed with ML.

This memo also documents the technical evolution from the CLS-I through the CLS-IIz. I owned all four versions, and the only one with a performance glitch (in the upper midrange) was the CLS-II, quickly remedied with the "a" mod. But it still dipped to .6 ohms at 18KHz. The IIz mod took care of that. You can drive all four at 4 ohms, with 100W (+/--) of tube power, or 200W (+/--) of ss power.

Arcici no longer makes CLS stands; but Sound Anchor currently makes much better ones (IMO), and the current price is ony $575/pr. (I think ;--)
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Nsgarch, The topic here is the original CLS. I purchased Arici stands direct from Ray Shab before the stands were discontinued and my experience with the original CLS includes time spent with and without the stands. Associated equipment included Audio Research D-115 MKII, Quicksilver 8417 monos, Quicksilver Silver 90 monos, VTL Ichiban monos, Audio Research SP-8 MKII, Quicksilver full function preamp, Audio Research LS-2B, VTL Ultimate preamp, Ocos, Magnan and Audioquest cables. A Muse Model 18 subwoofer with CLS performance card also spent time in the system.

It should be noted the Arcici stands were recommended after the update to the CLS II and the major change in the CLS II was the increase in bass. As I previously mentioned, the original CLS in a differnet animal from the CLS II. Associated equipment that works well with one may not work with the other and that includes stands.

In associated equipment I did not include the wide variety of solid state amplifiers that spent time in the system because none of those amplifiers came close to the performance of tubes.

The original CLS is an amazing speaker and most amazing speakers are very demanding. Reviewers, dealers and owners struggled with these speakers because they were so sensitive to everything in the system. The change of one wire and the system could fall apart.

In my listening room measuring 15'X20'X8' the original CLS sounded best without stands. They also sounded better without a subwoofer. Because of the speaker's revealing nature the simpler the system the better the sound.