Amps - Whats in em and why?

All general audio posts go here.
Geoff.R.G
Posts: 704
Joined: Thu Aug 11, 2016 2:46 pm
Location: Denham UK
Great Britain

Re: Amps - Whats in em and why?

Unread post by Geoff.R.G » Tue Nov 05, 2019 9:57 pm

TheMadMick wrote:
Tue Nov 05, 2019 8:13 pm
valvesRus wrote:
Tue Nov 05, 2019 7:54 pm
Daniel Quinn wrote:
Tue Nov 05, 2019 7:51 pm
You pays your money, you take your pick
Indeed, but it's not actually an answer to the question. ;)
The sides are fluted to allow heat dissipation from these output transistors to stop them frying.:mrgreen: :mrgreen:
The sides are fluted to increase the surface area to allow greater heat dissipation than would be the case without it.

User avatar
Hemmo1969
Posts: 268
Joined: Sun Sep 24, 2017 11:57 am
Location: South Yorkshire
Great Britain

Re: Amps - Whats in em and why?

Unread post by Hemmo1969 » Tue Nov 05, 2019 10:38 pm

So back to the questions in hand.....

So if you read the excerpt below, what then is or the benefit of;
Polypropylene capacitors
K-Power reserve capacitors
An output stage using 4 x 160w Sanken output transistors. Are Sanken even a good brand.
And secondly looking inside said Amplfier there just one big trodial transformer? Is this really the best way 1 x big I thought NVA Amps had multiples of on either input or output?

Daniel Quinn
Posts: 7680
Joined: Thu Jul 12, 2012 7:16 am
Wales

Re: Amps - Whats in em and why?

Unread post by Daniel Quinn » Tue Nov 05, 2019 10:42 pm

The 1st bit is marketing. And the 2nd, you are wrong about nva.

P40 is one 100va per unit, the stereo p60 as on
1 160va.

User avatar
Hemmo1969
Posts: 268
Joined: Sun Sep 24, 2017 11:57 am
Location: South Yorkshire
Great Britain

Re: Amps - Whats in em and why?

Unread post by Hemmo1969 » Tue Nov 05, 2019 10:59 pm

Daniel Quinn wrote:
Tue Nov 05, 2019 10:42 pm
The 1st bit is marketing. And the 2nd, you are wrong about nva.

P40 is one 100va per unit, the stereo p60 as on
1 160va.
Thanks Daniel

Daniel Quinn
Posts: 7680
Joined: Thu Jul 12, 2012 7:16 am
Wales

Re: Amps - Whats in em and why?

Unread post by Daniel Quinn » Wed Nov 06, 2019 8:51 am

Though tempting, my word should not be taken as gospel.

Some people will tell you the make of capacitor or output transformer is important. Either decide for yourself or stop worrying about it and listen to your amps.

User avatar
savvypaul
Posts: 3692
Joined: Tue Oct 11, 2016 7:14 pm
Location: Durham
Contact:
Great Britain

Re: Amps - Whats in em and why?

Unread post by savvypaul » Wed Nov 06, 2019 11:05 am

Daniel Quinn wrote:
Wed Nov 06, 2019 8:51 am
Though tempting, my word should not be taken as gospel.

Some people will tell you the make of capacitor or output transformer is important. Either decide for yourself or stop worrying about it and listen to your amps.
The make is irrelevant, quality and synergy is important.

We tried out 5 different load resistors for the preamp upgrades - the most expensive was one of the least liked.

Daniel Quinn
Posts: 7680
Joined: Thu Jul 12, 2012 7:16 am
Wales

Re: Amps - Whats in em and why?

Unread post by Daniel Quinn » Wed Nov 06, 2019 11:08 am

Load resistors, I didn't mention. Can't say empirically - yet- but intuitively they may well make a difference.

valvesRus
Posts: 227
Joined: Sat Feb 24, 2018 2:34 pm
Great Britain

Re: Amps - Whats in em and why?

Unread post by valvesRus » Wed Nov 06, 2019 11:10 am

Daniel Quinn wrote:
Wed Nov 06, 2019 8:51 am

Though tempting, my word should not be taken as gospel.

Some people will tell you the make of output transformer is important.
On a valve amplifier having a better quality of output transformer can make a HUGEimprovement to the sound quality.

Unfortunately, better output transformers are mostly much more expensive.

Daniel Quinn
Posts: 7680
Joined: Thu Jul 12, 2012 7:16 am
Wales

Re: Amps - Whats in em and why?

Unread post by Daniel Quinn » Wed Nov 06, 2019 11:32 am

I didn't mention transformers or valve amps, except were I put transformer and obviously meant transistor.

I have no wish to play about with differing types of colouration. Colour choice I leave to decorating.
Last edited by Daniel Quinn on Wed Nov 06, 2019 11:58 am, edited 1 time in total.

valvesRus
Posts: 227
Joined: Sat Feb 24, 2018 2:34 pm
Great Britain

Re: Amps - Whats in em and why?

Unread post by valvesRus » Wed Nov 06, 2019 11:49 am

Daniel Quinn wrote:
Wed Nov 06, 2019 11:32 am

I didn't mention transformers or valve amps.

Quote "Some people will tell you the make of output transformer is important."
You most certainly did Daniel, what amps have "output transformers" apart from valve based ones ?

Post Reply