You are not logged in. [Log In]


Forums » General Discussion » Home Theater » AVR or pre amp recommendations? Going 4K

Page 10 of 16 < 1 2 8 9 10 11 12 15 16 >
Topic Options
Rate This Topic
#432527 - 06/11/19 09:47 AM Re: AVR or pre amp recommendations? Going 4K [Re: Mojo]
michael_d Offline
connoisseur

Registered: 07/23/04
Posts: 4220
Loc: Up yonder
Originally Posted By Mojo
Aye! I like the old-fashioned one. smile


I like Old-Fashions!
_________________________


Top
#432602 - 06/17/19 09:23 AM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
bman84 Offline
veteran

Registered: 09/29/18
Posts: 181
Loc: Toronto, Ontario
Can anyone speak to the difference (or lack thereof) between sound quality when using a dedicated pre-pro vs a receiver with pre-outs? Does a pre-pro sound noticeably cleaner for HT, all else being the same?


Edited by bman84 (06/17/19 09:43 AM)
_________________________
Axiom M5HP,VP180,M3,ADA1000
Anthem MRX 720
SVS SB-3000 (dual)

Top
#432603 - 06/17/19 09:54 AM Re: AVR or pre amp recommendations? Going 4K [Re: bman84]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 148
Loc: Boston Area
Can't speak for real life as I have not ever done an A/B test ... but having been an audio designer (back in the 80's and not for Hifi stuff), and only speaking for my self, I doubt I could hear the difference between the two given reasonably designed units (and assuming your by passing all the surround and room correction, etc.)

Top
#432604 - 06/17/19 10:25 AM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
Mojo Offline
axiomite

Registered: 01/21/07
Posts: 6094
I can't tell you from experience because I've never done an A/B. If one has lower THD+N and higher S/N, I would expect that one to sound better. Both of those figures result in improved reproduction of microdynamics. Microdynamics are responsible for imaging and holography.
_________________________
M100,VP160,QS10HPx2,EP800,M5HP,M3,M50 v4
M80,VP150,QS8x4,EP600 v2
ADA-1000-2,3,1500-3
Air N2

Top
#432605 - 06/17/19 11:16 AM Re: AVR or pre amp recommendations? Going 4K [Re: Mojo]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 148
Loc: Boston Area
Mojo ... give the guy some numbers ...
What do you think should be the cut off for those ... where it become just a spec and not audible ... (also many times there are trade offs being made to get a spec ... usually dictated by marketing ... who IMHO are mostly made up of brain dead zombies out to sell product to the unknowing public. My apologies to the marketeers out there.)

So is 0.01 THD much better then say 0.1 THD or even .3THD?? Do you think you can hear it? how about a S/N below 100db ...

Top
#432606 - 06/17/19 01:27 PM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
bman84 Offline
veteran

Registered: 09/29/18
Posts: 181
Loc: Toronto, Ontario
Things get a bit murky when talking about THD, as there is no universal standard for measuring it. As you say, specs have become the domain of marketing.
_________________________
Axiom M5HP,VP180,M3,ADA1000
Anthem MRX 720
SVS SB-3000 (dual)

Top
#432609 - 06/17/19 04:10 PM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 148
Loc: Boston Area
bman84,

Been a long time since I did one of these measurements but there are only two variables to play with: the fundamental frequency and the level. The standard frequency I always used was 1kHz. As for level ... if I remember correctly, I think I put the amp into clip and then backed it off till the THD stopped falling. This also is probably the best point for THD+N.

That said I'm sure some played around with both and then only give you the best THD number.

One more thing ... peoples sensitivity to THD varies with frequency ...

Top
#432610 - 06/17/19 04:32 PM Re: AVR or pre amp recommendations? Going 4K [Re: rrlev]
Mojo Offline
axiomite

Registered: 01/21/07
Posts: 6094
Originally Posted By rrlev
...but there are only two variables to play with: the fundamental frequency and the level.


For THD, there are three. The third is the number of harmonic products measured.

Top
#432611 - 06/17/19 04:51 PM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 148
Loc: Boston Area
yup .. your right Mojo.

Also nobody gives you the full spec. A fully specified spec should read
Less then 0.01 THD+N, at max gain, 20Hz to 20kHz, 20kHz window, input 1V peak to peak ...

This BTW would be an excellent spec ... even IMO if it said 0.1 THD+N

Top
#432612 - 06/17/19 05:56 PM Re: AVR or pre amp recommendations? Going 4K [Re: michael_d]
brendo Offline
devotee

Registered: 10/14/14
Posts: 487
Loc: West coast Canada
On this topic have any of you guys joined Gene of Audioholics cause. Truth in power ratings.
He's planning to send a petition to Sound United. To stop the inflated power ratings.

Top
Page 10 of 16 < 1 2 8 9 10 11 12 15 16 >

Moderator:  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 
Forum Stats

15,340 Registered Members
16 Forums
24,206 Topics
428,054 Posts

Most users ever online:
883 @ 03/04/17 05:06 PM

Top Posters
Ken.C 18044
pmbuko 16437
SirQuack 13611
CV 11734
MarkSJohnson 11445
1 registered (craigsub)
266 Guests and
3 Spiders online.
Key: Admin, Global Mod, Mod
Newsletter Signup