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
Post removed 
It's all about bang for the buck, as assetmgr said.

I suggest that you include a record cleaner in your budget. Perhaps the best bang for buck. I went to ultrasonic.

Least bang for buck, IMO, is cables. I went to the trouble of building theoretically optimal interconnect cables (virtually zero capacitance, virtually zero dielectric absorption, gold plated fine silver) inside a Faraday cage cabinet (for noise rejection), and found them no better than star quad microphone cable (Canare, Mogami) with decent termination (ETI, Klee).

When you open up a high priced component, you'll see why - they use internal wiring which is no better than microphone cable in terms of noise rejection and dielectric absorption, and very little better in terms of capacitance, three key physical properties. I suggest that you buy cheap, real cheap, and upgrade only when some one can demonstrate a better sound in your system.

Let the hate mail begin.
@skyscrapper  send me a direct message if you want to walk with me on the A3. I am buying this myself and have figured out what the best power options 1, 2, 3, 4 etc are for them (my opinion). Some of these posts can get you confused.
Yysantabarbara, you're absolutely correct about the power requirement. I'm on it.

Onhwy6i, yes, that's easily done.

Inna, so you think I should stay with A/B's. OK, I'll look into them.  I rarely except on occasion blast my music any more. Low to moderate listening levels prevail. Many years of complaints about volume modified my behavior in this regard. I'll look into listening to the Luxman's you suggest side by side with an integral phono stage compared to the Hegels with an outboard one, if at all possible. Thanks

Audioman, unfortunately I can only afford to lust over the Hegel H590's. As it is the H360 at $6000 exceeds my budget by $1000 but I'm willing to go with Alon Wolf's recommendation in order to ensure my Magico's are well matched to their amp.

Rbstehno, You're right, 30-60 watts won't get it for sure with the Magico's. Thanks for sharing your DAC experience. I'll be trying inna's suggested higher powered Luxman A/B models.

2psyop. appreciate your explanations on ohms and power requirements, including what speaker sensitivity entails. Researching on the internet can be confusing. For instance I read the the Magico A3 was a 4 ohm speaker and the next article described it as an 8 ohm type. This is confusing to someone who has just enough knowledge to be dangerous. 

Builder3, thanks for the clarification on specs on the Luxman L-590AX.

Assetmgrsc, I should get subscriptions to Stereophile and Absolute Sound. I have a card for a discounted Stereo Review subcription laying around here somewhere. I used to subscribe to Stereo Review, Hi-Fidelity and Audio years back and always enjoyed them in spite of much of the technical talk going over my head. Those subscriptions were in the pre-internet era. Now you can seek out explanations of the technical terms on line, like I'm doing here right now. 

I only threw out piles of those three old mags last year. It would be fun to start new piles. Glad you mentioned it. Thanks for your other advice too.

Ieales, I was thinking, like you, that replacing my current separates with an integrated amp would eliminate some unnecessary and unnecessarily expensive cabling. Possibly having to add an external phono stage will return me to square one however. Nothing good ever comes easy.

Your'e Great Grandma's saying about the Irish is a scream.  Being an O'Neill I should know, and am still laughing. Good one.

Your explanation about impedance fried a couple of my internal circuit breakers. You are obviously well versed in these subjects. I am barely self taught.

Good advice on building a system. That's why I'm willing to dole out the extra cash on Alon Wolf's say so, since since my Magico A3's are his speakers and he should know what matches them well. I don't presume to.

Thank you for the good word on my Marantz 8005 CD player. I did do a fair amount of research on that one before purchase.  I'll check your link on power supply Z linearity too, although it's likely to cause further brain circuitry overload and damage, which I can ill afford. Take it easy now. Maybe I'll watch the Texas Chainsaw Massacre on Netflix later.

.
Terry9. I've a lot to learn about cabling. My old system is wired with zip (lamp) cord as most of us did in days of yore. It galls me what they can charge for a wire. I really have to stop whining.

Do you like your Ultrasonic?  I've done a little reading on record cleaners such as the VPI models and others. A record cleaner is in the queue for acquisition after a phono stage and cables. Fortunately, I still have my old Zerostat anti-static gun to use along with a record cleaning machine, I'll be breaking it out again after thirty years of disuse, sitting in a drawer. I've even considering  getting my old Burwen TNE 7000 Transient Noise (pop & click) Eliminator up and running again. No stopping me now.

After buying $10,000 speakers, now you're recommending I go cheap? You're inspiring me to throw bricks in your direction like Krazy Kat used to do. Take care now Terry. 

Mike








Mike, I really do mean cheap, as in $10 or $20 a pair. $100 max. You can just laugh and throw them away when someone demonstrates better.

I run a six figure system on premium microphone cable and ETI connectors, maybe $75 a pair to solder up. Speaker wire is a special case for me, but when I was using stock speakers, I used Goertz speaker cable at about $10 / ft. Current system is vinyl and ESL.

Exotic power cords are bettered by an isolation transformer, IMO.

Yes, US cleaning makes a big difference. I use a German commercial unit made by ElmaSonic (80KHz) and a spinner made by Vinyl Stack. The difference between cleaning with the VPI 16.5 (now sold) and US is about equivalent to moving from $5000 speakers to $10,000 speakers. Not to mention wear on your stylus. IMO. YMMV.

Good luck!