• WANTED: Happy members who like to discuss audio and other topics related to our interest. Desire to learn and share knowledge of science required as is 20 years of participation in forums (not all true). Come here to have fun, be ready to be teased and not take online life too seriously. We now measure and review equipment for free! Click here for details.

marantz inquiry

Joined
Jul 6, 2020
Messages
76
Likes
33
Location
south of the equator!
#1
to the more knowledgeable folks here at ASR, i humbly seek thy wisdom so that i may follow the straight and narrow path. i copied a portion of marantz literature on their website below. to a total novice like me, something that may across as useful knowledge or hogwash BS. i hope y’all could shed light on what this tech babble is all about?? let me know thy thoughts! cheers!

D7F5DA6C-D67B-42CF-95B6-3EA9DBBA3C55.jpeg
 

PierreV

Addicted to Fun and Learning
Forum Donor
Joined
Nov 6, 2018
Messages
792
Likes
2,172
#2
I am not a member of the more knowledgeable crowd, but this looks like a decent summary of the concepts.

https://www.electronicdesign.com/te...n-voltagefeedback-and-currentfeedback-op-amps

So pluses and minuses.

A Marantz HDAM-Sn advertisement blurb for another product

"Current Feedback amplification, a renowned Marantz-proprietary circuit technology, is thoughtfully designed to match the requirements of Super Audio hi-res music for wide-bandwidth, high-speed reproduction. The impedance at the Current Feedback point is limited, generating a very low phase shift. Marantz Current Feedback amplifiers reduce the need for phase compensation by minimizing Negative Feedback (NFB). This simplifies the signal path and results in a high through-rate, excellent transient response and superb sonic transparency across the full bandwidth. Unlike conventional Voltage Feedback topology, Current Feedback renders the power amplifier nearly immune to difficult loudspeaker loads."

So far so good.... the concept is similar to the one described on electronic design but, there's a difference

"Marantz developed its own discrete circuit boards called Hyper-Dynamic Amplifier Modules, or HDAMs, to replace the chip-based amps used elsewhere. Using discrete surface mount components with short mirror-image left and right signal paths, HDAMs outperform the regular integrated Op-amps dramatically in Slew Rate and noise level. The result is much more dynamic, accurate and detailed sound. Over the years, Marantz developed different HDAMs to fit the particular requirements of each player and amplifier. The PM7000N uses the high-grade SA3 version"

Marantz will, of course, claim that their option is better than the alternative. However, based on the test results of very similar devices (Denon vs Marantz) here, it seems that Marantz HDAM-S isn't delivering on its promises. I think I saw some very competent members here express the opinion that Marantz would be better off (from a strict measurement point of view) if it dropped HDAM and started doing things differently.

Anyway, as an end-user, I don't think I care about how results are achieved but only care about what the result is.

Plus, I don't have "Super Audio" music. Just normal audio music. ;)
 
OP
hawk01
Joined
Jul 6, 2020
Messages
76
Likes
33
Location
south of the equator!
Thread Starter #3
nice chunk of worthy information @PierreV! if only to compare marantz HDAM-S on the measured performance of their avrs to denon it becomes apparent that their’s is delivering short of expectation. makes you wonder why after measuring so poorly they still keep implementing it on the later models only to measure so poorly again! reason for my deeper query into this is i am considering one of their integrated amplifiers with onboard streaming feature. hmm, may be worth a deeper second look or seek other options.
 
OP
hawk01
Joined
Jul 6, 2020
Messages
76
Likes
33
Location
south of the equator!
Thread Starter #5
They are looking for differentiation at the expense of performance.
aww, this is just a very bad, very poor business model especially nowadays when everything and anything is easily within everybody’s reach! i am sure they can do better than that if they just get off that high chair of heritage and culture.
 
Top Bottom