i had not heard class d that i thought could equal class a/b until i bought a devialet unit, which sounds really excellent
devialet calls what they do a 'hybrid', using a regular class a section to slave the class d section - i am not technically equipped to understand or describe that in detail but i can say it makes no apologies to the best class a/b amplification i have ... hegel, naim, audiosector, primare etc etc |
@cooperjack
curious to hear your characterization of the sound quality difference between the pass and stellar
pls advise your speakers and source |
class d greatest strength is outstanding bass, so yes on that front
but dual subs are much better than one... some will even say the best way is a 'swarm of subs' to smooth out the deep bass response, which can be very lumpy and hard to modulate with a single sub in many rooms |
@twoleftears
@tvad
when i see VTV i think of the wonderful, long defunct print magazine that i learned so much about vacuum tubes for audio from... |
this is a good discussion
i too am interested (in a more technical, geeky way) to understand WHY a class D amp delivers higher damping factor (let’s use that as a proxy for bass control and quality) than a similar class AB amp using standard transistors be they mosfets bipolars etc etc... let’s say the power supply quality is the same and the input stages are well designed... the switching amp or transistor effectively ’gates’ the power supply from the speaker load at the various frequencies asked of it, per the input signal
why is it that the class d module does it better than a well designed set of transistors, with a higher degree of control/accuracy? |
@larry5729
answers to your why question:
- heat
- efficiency
- weight
- cost
- heat
- heat |
Class D Amp, the D means digital. It uses the digital way to emplify the signal, not sine wave anymore. wrong, so wrong... |
another good discussion thread devolved and down the toilet
except for us bored souls who habitually hang out here, who in their right mind would come here for some real insight and good info -- and read this mean spirited crap???
especially people who are ’in the industry’ -- why would you pollute your own backyard?
leaving aside the obvious trolls who have nothing better to do than post 300+ posts in 45 days since joining, zero transactional feedback, no system disclosed, stirring the pot every post? |
after reading this thread and its recent entries i have to agree with doug s when he says Especially since audiophiles love to jump to contusions LOL |
phd a trumpy democrat hater -- woohoo
and i thought red just stands for the uneducated pull wool over my eyes contingent... |
@mikem Class D done right can sound very good this is of course the correct answer... like any technology/format it is in the implementation quality, skill of the designer, the care in the voicing over 300 posts in this thread... much heat very little light people bellyache why a sub 1000 dollar class d amps sounds like crap... well there are cheap class ab amps and tube amps that sound poor too... true for more expensive ones too... |
many many good points made by noble100 in his lengthy post below
-- know that utter transparency is often not the path to musicality of presentation in a hifi system -- sympathetic coloration is frequently the magic ingredient
-- preamp/linestage feeding class d amp is key to sq (corollary is driver stage of the class d module affects the amp’s sound greatly)
-- hear enough of what’s possible and learn about yourself and what you like and value in terms of sq
-- pleasing others, seeking measured accuracy, pursuing ’straight wire w gain’ is often missing the point - which is to assemble a system that plays music so beautifully it moves us makes us smile and feel great
|
@jaytor @noble100
i agree that a huge benefit of an active preamp/linestage is impedance matching -- this has a real impact on the sound we hear - the impedance matching and compatibility between 2 devices in a signal chain is something that is often underappreciated, is difficult to measure and gauge without careful listening
noble, i also agree that your levinson unit is doing what it is doing all time, it doesn’t know what is passing through it... that been said, signal rise time, slew rate, power supply stiffness and speed are all attributes that affect transient response and clarity in any amplification device/buffer -- and the way a good linestage does this can be so helpful in a mild ’rounding out’ of the sound (esp. at higher volume levels) that in turn pleases our ears a great deal... |
