Please tutor me on some integrated amp basics.


I’ve recently purchased Magico A3 speakers and a VPI Classic 2 SE turntable with an Ortofon Black 2M moving magnet cartridge. I have a Marantz SA 8005 CD/SACD player to play the few (maybe a hundred or so) CD’s in my possession.
I’ve mostly vinyl albums and no streaming sources. I’m next going to upgrade my old amp/preamp purchased back in the late 70’s with a new, probably integrated, one and am starting to do some research.

Here’s where I need some tutoring. A lot has changed since the seventies with the advent of digital technology. As well as I need to learn more about amplification components in the high end of audio technology. I keep running across terms I don’t understand. I’ll give you a list and if someone would be kind enough to explain these basics I’d be obliged.

For instance I was reading about the Hegel H360 integrated amp that Magico’s Alon Wolf recommended for their A3’s. The review mentioned they were a Class A/B amp, another person commented Class A’s were better, and a third person said he didn’t care for Class D amps. What do these classes signify? 

A second question is about DACs. I generally understand their purpose of the DAC, converting a digital to an analog signal. However my only digital device, the Marantz SA 8005 already has a DAC, ostensibly of good quality. The turntable ’s Ortofon cartridge would not need to play through a DAC, I presume. Would I bypass the CD’s players DAC if I purchase the higher quality Hegel H360 integrated amp?. Or could I find an equivalent integrated amp without an integral DAC?

On the other side of the equation I understand the turntable’s cartridge cannot play through the Hegel without first going through a phono stage. My old Phase Linear 4000 preamp you just plugged the turntables RCA cables into the back of the preamp and you were done. What’s that about? Do they make equivalent integrated amps to the Hegel H360 with integrated phono stages already in place, so I can just plug my turntable in as I’ve been able to do before. The amps don’t seem to be well integrated at all if you have to add a pricey phono stage to make them work, and end up having an extra DAC. That’s just me whining.

Third question is what are monoblocks, how are they used, and what are their advantages to a system? They were used at one of my speaker auditions.

I figured out the answer to what amplifier damping was myself, so I’m sparing you that one, but what does the term impedance mean? I keep coming across that.

Thank goodness I don’t have to figure out the cabling nightmare yet. Thanks for any help.

Mike
skyscraper

Showing 8 responses by twoleftears

I think you can do better than Hegel.  I know you want to buy new, and 5-6K is the limit.  Luxman and Modwright are two good suggestions.  I don't know how far up the Sim Moon line the $$ get you, but I'd also take them over Hegel.
ayre
pass
parasound
mcintosh
rogue
belles
quicksilver
ARC
These are all very good brands, but I suspect that some of them won't offer the wattage that you need with the Magico's within the price point you specify.  For instance, you could get Belles preamp+monoblocks new and within your budget, but that's "only" 112W into 8ohms.

Brand new a bit of a budget-stretcher, but this really could the solution to your problem.

http://www.coda.cc/product/ Check out the CSiB

@skyscraper The Simaudio is a very nice unit, but I'm not sure it has enough oomph.  I would definitely add the Plinius to your list.  I just searchd "CSiB" on this forum and there were 64 hits.  Likely a number belong to the same threads.  Worth taking a look when you have some time...
I had a Furman IT Reference 15i briefly in house, and it was completely quiet.

@skyscaper I strongly recommend you don't buy cables (phono, interconnect, speaker, power) based solely on readings reviews or forum feedback.  You need to put several makes/models in your system and see if you hear a difference, and if so, how big.  If you get into this seriously, the Cable Company has a lending library.  I don't know if Uptown A. could lend you a few cables to try (what brands does he carry?).  There are probably hundreds of cable brands out there, from huge corporations to lots of individuals working over a hot soldering iron in their garage.  Each and every one of them has their proponents.  There are cables at every price level: "budget", value/mid-line, expensive, stratospheric.  I'm not going to mention my current favorite, because that will probably just trigger a bunch of other recommendations, and there are already many, many cable threads on this forum that you can easily look at.  There is no hard-and-fast rule concerning % of total cost to put into cables, but it obviously doesn't make sense either to have things too disproportionate.  If it's electrically sound, zip cord will surely work, and also provide you with an excellent base-line against which to make comparisons.  Just try and think about something else until February.

You could think about getting a dedicated 20amp line installed running to your listening room.

There are five or six companies that all make very good isolation transformers.  Field reports suggest that they can indeed hum.  There are some good ones a little less expensive than the Furman, it's just that (a) I could source it locally, and it was returnable, and (b) forum feedback suggested it was less susceptible to hum than some other brands.

Isolation transformers are heavy.  If you have a strong back and don't mind schlepping, and can ensure returnability, this may be something you might want to experiment with.

I'd seriously consider some Duelund 12 and 16 awg biwires.  Talk to @grannyring