A queston of Classe', or other amps



Several years ago I visited my Magnepan dealer with the cash in my pocket, and the prior intent to take home a pair of Magnepan 1.7i speakers. Driving the maggies was a Classè CP-800 preamp and a big pair of Classè CT-M600 Monoblock power amps.

I may have happily listened to the Magnepan 1.7i speakers for almost two hours when on a lark I asked to listen to the Magnepan 3.7i speakers. In only six notes I knew I would never be happy with the 1.7i speakers so I drove home with the cash still in my wallet and a plan to save up for the Magnepan 3.7i speakers.  It took a while for me to save another $4,000.

I am old and I must have the features that a remote control offers. Mostly just volume control; I am straight wire with gain kind of guy. I have owned RTA and equalizers but after the dog and pony show I always revert back to the clean basics. My critical application is stereo music.  Yes I have the Magnepan set up for home theater but I don’t see that as critical or near as interesting as 2 channel music. My only source of music is my Oppo 103d optical drive (as DAT) with my music collection on a 2TB USB hard drive. My days of tape decks, vinyl and tuners are forever over.

The only thing I did not like about the audition was the heat. The combination of Classe’ amps made the 18’x24’ showroom unbearably hot after only two hours of listening. My home listening room (only slightly smaller) is near my home thermostat and I can easily see the amps shutting down my furnace in the winter and tripling my AC bill during the summer.  I’m not going to do that.  Then again, do the mono blocks run any cooler with music at conversation levels?

So almost 3 years ago I purchased a new pair of Magnepan 3.7i speakers and a Rotel RC-1590 preamp (<0.002% THD). Those feed my 40 year old Yamaha M-2 power amp (350w+350w) into 4 ohms with <0.005% THD. And it all sounds OK, just OK. It does not sound as good as I remember with the Classè amps which just took my breath away.

When the current zombie panic is over. the dealer has a demo Classè CP-800 in stock which he told me I could have at a good price. Common sense tells me a clean 700wpc of the Classè monoblocks for 4 ohm speakers might be fun but should not be necessary (nor are they very affordable).  Am I wrong to assume I only need a preamp and not both pre and power amps?

I think my Maggies are well placed about five feet away from the back wall. I don’t think this is as simple as a speaker placement issue?

The Classè dealer also sells Acoustic Research preamps and PrimaLuna. I don’t know if I would group PrimaLuna with Acoustic Research and Classè?

 If I knew I wanted the 3.7i speakers after 6 notes; the difference to my ears was that obvious.  Could my Rotel be that mediocre? Am I going to spend $5,000 on a Classe’ pre amp and then wish I also purchased the monoblocks?

Is it my imagination that Classè monoblocks always act like 100,000 watt space heaters or is that only when pushed hard?

Sorry to be so long winded, I hoped that by expressing all the germane facts up front one might expedite the discussion.

 BTW, my preferences in music amounts to almost anything except Rap; mostly Jazz, Blues, Gospel, to a lesser extent some Classical and some Rock and Roll.

 


timothywright
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First; thank you one and all; for your insightful, thoughtful, helpful contributions.  I am getting an education (via research) on “mid-size” Classè amps, midsize as in less than 1200wpc in to 4 ohm. I am comfortable but not wealthy and one could argue that at some point spending a fortune ($20,000) on huge monoblocks is actually unwise, wasteful and perhaps sinful.  I aim to peruse some moderate course.  Classè CA-M400, or CA-2300 so that my power amps are not worth more that what I drive around in everyday.

 In that the Yamaha makes 350wpc without clipping I do find myself listening at high power levels more often than I thought I would.  The maggies are so inefficient that if the amp is not clipping they could suck all the power out of the Hoover Dam hydro plant. I am still looking for that transparent imaging I heard with the Classe amps and sadly the only knob I have to tweak is the “more volume” but that isn’t giving me what I need.  I believe that if I could get the transparent imaging I am looking for at lower volumes I would listen at lower levels.  (> look at it as a system.)  I suspect the system approach mentioned is the most relevant critical analysis.  Thank you.

 It is not important to me, as in bragging rights or wife acceptance factor that my power amps are or are not in the form of mono blocks.  So something like a CAM-600 would be perfectly acceptable.

 It may come down to what the dealer has in stock as his demo items, he seems willing and able to horse trade.

 My listening room is only 15’ by 24’ with TV and speakers centered on the long wall.  My speakers are 5’ off the back wall. If my listening room became 100F every time I used my stereo I could never use it.   It is only recently with my latest PC build that my home office does not get 100F with my water cooled PC.  I hated that.

 I will not buy anything with out extended listening to it first, what I buy may be used (demo) but it will be “new retail”. The great simplification and saving grace is that I know I love the sound of Classe driving Magnepans.


Timothy,
Very sensible response.  One note... the CA-M400 is the previous generation.  It runs warmer than the 600 same situation with CA-2200 vs. CA 2300.  My experience is that there is less heat and slightly better sound quality on the later ones.  You can easily tell the difference by the front panel.  The earlier generation has the LED’s and selection between balanced and single ended.  The later has an air inlet and only a single LED for on/off/standby.  Cost is significantly lower on earlier generation. 2200 is less than $2K, 2300 is over $3K.  Similar changes with 400 vs. 600.  Also note that the CT rack versions (while being same electronics) all had $500 lower retail prices than CA (silver) version.  

All of these amplifiers are excellent sounding and reasonable values on the used market.  

Also, fun fact... If you search internet you can find pictures of Abbey Road studio recording rooms and mix rooms with B&W speakers situated next to double stacks of CAM-400 mono blocks (normally 3 sets of 2 per studio)... pretty cool!
I recently purchased a used pair of CAM600 monoblocks. My speakers are Apogee Duetta Signature ribbon panel speakers which are low efficiency (86 dB). My listening rom dimension are 18 x 11. I am retired and listening either to music or TV in my room close to 5 hours/day during the Corona virus pandemic.

 I can guarantee you that the Classé amps will not heat up your listening room. I had the amps running for a few hours today and their aluminium case is actually at room temperature. I do not sense any kind of heat at their touch.
The latest developments, while I wait for my Classe dealer to reopen (30-45 days?), is that my Yamaha M-2 power amp is in the shop, and this time I plan to recap it. This is not an inexpensive or trivial medical procedure.  The Yamaha M-2 has two capacitors in particular that are the size of coffee cans, so replacing those along with many smaller siblings may cost $500 or more.

 

In my perfect and imaginary world my fresh Yamaha will be capable of taking on all contenders.  Anticipating other outcomes I still have an interest in Classe and Mr. Snyder your comments are particularly helpful. My Classe dealer has 3 locations and seems willing to “make a deal” on what ever he has in stock when he reopens. I am having trouble getting a listing of his Classe inventory and pricing so I could know my options.

RE CA-M400 vs. CA-M600 et all, duly noted, very useful to me, thank you very much

 > One final note...  The system as outlined above demands and deserves high end power, interconnect, USB and speaker cables.  I am using Nordost Valhalla and they absolutely bring out the best. – I have always been skeptical of magical cables, but I will try your recommendations. (Thank you)

 > Mr Schubert RE: Buy while the dollar is still worth something.

 These are unusual times. Recently the dollar is up markedly against the Euro, CDN, AUD and steady against the Yen. As screwed as we (USA = dollar) may be, it may be that most all other nations are far worse off.  Since Putin picked an oil fight with Saudi Arabia the Ruble is taking a bath. The price of crude oil could actually go negative.  Gold which one buys in anticipation of times like these has failed to perform as promised.  Yes these are most unusual times, but I expect a rapid economic recover as long as the Second Coming does not interfere.  The Fatima prophesy (Oct 1917) was that the world would end in 100 years. My next audio system might just (hopefully) be a harp.   ;-)