Carver Power Amps


Even though the Carver A-760x magnified current power amplifier was rated at 380 watts per channel into 8 ohms and 600 watts per channel into 4 ohms and lab tested at 500 w/ch at 8 ohms at clipping and 725 w/ch at clipping by Audio Magazine in 1997, it sounds gutless, especially in the bass, compared to a Parasound HCA-3500,etc!
Any opinions on why this is so?
daltonlanny
Want more proof that the Carver A-760x is over-rated?
I have a stereo receiver in my bedroom, a very good one, a Harman-Kardon HK-3470.A high current model rated at 100 watts per channel into 8 ohms and 130 watts per channel into 4 ohms. I brought it into my living room and hooked it and the Carver A-760x up so that I could compare them head-to-head into my main stereo system.I also used a SPL meter from Radio Shack.I was shocked to say the least!Sure the Carver was more open,had better imaging, and a little better transparency than the Kardon.But, the Harman/Kardon had better top-end extension,the bass was dead-even!The mids sounded very similar,and they both sounded flat and lifeless at low volume levels.They both started audibly clipping at the same level on the SPL meter!They both started sounding compressed and harsh at levels the Parasound HCA-3500 took in stride!Head-to-head the Parasound handily beat them in almost every category,especially the bass, image depth, smoothness, detail, and top-end extension.I am so happy that I bought the Parasound.A great amp! A brute of an amp!
Dalton, though Im glad to see your excited, I do have to say that just cranking the volume isnt a sure fire way to say ones better than the next, though Im sure its good for your own experimentation, others may find it a bit lacking! =) Did you know that it only takes 1 db for a change in perception between equipment comparisons?To do real fair comparisons you need a tuned mic that can allow you to level match equipment properly for true comparisons. In fairness to everyone else(like folks who do own and enjoy their Carver products)just having an amp with more wattage doesnt necessarliy make it better. Gobs of power is great for quick, full dynamics, or if your running really inneficient speakers(like low impedance speakers with low sensitivity etc)they are great too. But for speakers like Paradigm Reference speakers which are an easy load to drive and relatively efficient, your going to find that your only putting through 25-50 watts at "normal" listening volumes in reality. There are alot of great amps that put out relatively low wattage and have great sound potential too. Some people even argue that lower powered amps using less parts sound superior too(along with a million other arguments in this stressful hobby! LOL!). Even your room will dictate how much power is needed. If your in a bedroom though with those speakers and amplifier, youll be running less than 25 watts I bet. Which is a good thing anyway. That Parasound amp sounds best when its biased in class A operation, just so your aware.

Danvetc: I just wanted to add one thing towards you. I just feel that you shouldnt have interjected and defended the equipment in question when you yourself dont run the same piece full bandwidth. SOmeone who uses small monitors that dont have bass to begin with, shouldnt defend a product he may not have had complete familiarity with(hey maybe you do, but I am also familiar with that Carver amp and too many others unfortunately). You get your bass from your powered subwoofers, which in effect means your amplifier is now running limited bandwidth. I bet it does sound good with your setup too btw(even though I dont agree with the EQ), but again it proves my point further on the amplifier. You yourself actually tuned out its weakness running dedicated subs and allowing it to juice the upper frequencies. And btw, Im sure your system does sound great. Alot of hifi also has to do with equipment matching. In fact in many ways it can be the most important thing. And you dont need to spend a ton of money to get $40k sound (like me =P ). I can name a few systems Ive owned in the past where I spent a small fraction of the cost of my current system, and I still got 95% of the performance I have presently(but damn Fleetwood Mac and Tracy Chapman have never sounded better!)and had alot of fun putting them together too.
Carver didn't design the 20,000 tube amps. He just modded a design David Hafler did for him. The mods were minor. Ask him.
Warnerwh, I did not know that the 20k amps were not of BCarver's design. All the worse. From the commercials it seemed as if he was claiming the fame for them. I did not even know that Hafler had anything to do with Tube amp designs. The things people learn at Audiogon. Interesting. Daltonlanny, it is a proven fact that Carvers are beyond overrated....someone stated that Onkyo's were not allowed into a demo test to workers at a electronic retail outlet, all for a reason. Add concrete to its insides and use it as an isolation device.>=)
Paul
Ps: doesn't my dislike for Carver designs show clearly and brightly?
For those of you that still feel that Bob Carver is just another Joe as far as audio design goes, well here it is, from one of the most famous amplifier designers of all time, James Bongiorno:

A few words about the designer, James Bongiorno, and his creation:
"Twenty-Seven years ago James wrote a brochure describing the "Ultimate Amplifier" while at SAE. Of course, every engineer believes that their current work is the ultimate machine. However, it should be understood that this "Ultimate" design could only be as of the moment. The truth is that there never has been nor will there ever be an absolute "ultimate" perfect amplifier. Hard as we try, we get closer and closer but in reality, we’ll never approach perfection. Therein lies the enigma. Who defines what is perfect? What are the rules, the conditions, the standards, etc. The original Ampzilla set a standard, which has been copied, in topological form, for almost the last 30 years. Obviously something must have been right about it in the first place. Subsequently, the Sumo balanced topology has also been copied for the last 10 or 15 years. As we are now entering the new millennium, it is time for another breakthrough in the original tradition defined by the first Ampzilla.

The new Ampzilla 2000 is a radical departure in amplifier topology. Not many designers can make a claim like this. The only other designer capable of true innovation is Bob Carver although his application of technology and marketing go in different directions. Needless to say, James has created something truly new and innovative. All that can be said is, "It’s about time."

The new Ampzilla 2000 uses a completely new variation of the Forward Gain topology to achieve unprecedented improvements in linearity. As a matter of fact, the new circuit is so smooth, that it can be actually listened to OPEN LOOP, WITH NO FEEDBACK. Of course, we aren’t going to make it that way. The PROPER use of feedback is necessary in order to tie down all of the operating points so there will be no variations in performance from unit to unit. The new Ampzilla 2000 uses 12 250-watt output devices per monobloc. This is 3 times more devices than the original Ampzilla. In addition, since it is a monobloc, there is a separate 2500VA transformer for each. In addition, the amount of heat sink radiating area is 3 times greater than the original meaning that there is NO fan. Also, the B+ and B- supply fuses are EXTERNAL. Also, The entire circuit is totally balanced from input to output although there is a totally and uniquely new un-balanced to balanced converter for single ended inputs. Each monobloc has 100,000 ufd of power supply filtering with dual rectification as pioneered in the original Sumo's."

Please note the remark of this world renound amplifier designer regarding Bob Carver. If you are interested in reading the article, here's the link:
http://www.ampzilla2000.com/Amp_History.html