2. amps-preamps
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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
rbstehno
1,552 posts
 
The Luxman has only 30/60 watts. Unless you have very efficient speakers, I wouldn’t get a low powered amp. I would pick the Hegel over a lot of the integrated amps mentioned here, I did buy 1. The only reason I’m selling it was that I purchased a pair of speakers that need more power. Hegel makes a very good product.
The internal dac inside the Hegel is better than what you have in a CD player, but the Hegel standalone dac or other external dacs would sound better. I didn’t use the internal dac in the Hegel 
inna
7,923 posts
 
That's Luxman class A, I was talking about class A/B models.
2psyop's avatar
2psyop
1,869 posts
 
Most people here are talking about getting an amplifier that your speakers will DEMAND. When you invest a lot of money on speakers, you want to get the best performance out of them that's possible. Therefore if you have speakers like the Magico, that are really hungry for power, you will need an amplifier that is up to the task. I would take the advice given above and start learning about the classes of amplifiers, as that makes a difference in how much power and current you will need. Speakers that are very low ohms (2) need a great deal of power. Speakers that are (4) ohm need a little less, but still more power than (6) ohm speakers. With a (4) ohm speaker you will need more power than an (8) ohm speaker. Also the sensitivity of your speakers is something should factor into how much power you need and how loud you will be able to play your speakers. Sensitivity measurements of 88 dB are about average. Anything below 84 dB is considered rather poor sensitivity. The sensitivity of 92 dB or higher is very good and should be sought after.(Mostly because many amplifiers can drive higher sensitivity speakers).To get the best performance from your Magico speakers you may have to seek out a very good amp, that can produce a lot of current and a lot of power. Anyone here, correct me if I am wrong....

builder3
776 posts
 
Contrary to Luxman’s published specs, the L-590AX puts out in excess of 90wpc into 8ohms, not 30. It’s not purely Class A, they seem to have fibbed a bit. Presumably, it’s Class A for the first 30W. It’s far from "low powered". The phono stage is also more than a mere afterthought.  http://www.navratilaudio.cz/novinky/Luxman_L590AXII_HFW.pdf
assetmgrsc
59 posts
 
Skyscraper;  you are asking for a lot of explanation in your question and I'm sure that you will get a lot too.  However it likely will be overwhelming, so I suggest that you give yourself a subscription to both: THE ABSOLUTE SOUND and stereophlle magazines.  They are both excellent with respect to introducing you to a wide range of high quality  audio equipment, in various price ranges.  Also, as a subscriber you can go on line and review many back issues.  It can really be an education for you and you ought to enjoy the process.  To partially answer you original question, however an integrated amp combines a basic amp with a preamp.  Some include a phone preamp, as well; some include a DAC.  Your best bang for the buck is to stick with those that have all three.  Although I recognize that DAC technology is evolving current DACs in the PARASOUND HINT or the NUPRIME IDA 16, or the new HEGELs are all better than the one you are using and you will probably never want a newer one. Oh, one parting thought: don't be afraid of class D amps.  They have come a long way from those of years past.  HEGEL uses them, NAD, NUPRIME, and Rogue do as well.  Enjoy the journey.
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