Author Topic: My marshall is just to darn loud ! (Read 13855 times)

big steve · « **Reply #15 on:** January 07, 2006, 10:58:24 PM »

does anyone have any experience with kevin o'connor/london power's power scaling kits? they sound very intersting, i might get one if i ever start amp tinkering

MDV · « **Reply #16 on:** January 08, 2006, 09:36:40 PM »

HJM: An increase of 3 db is double volume. I was under the impression that doubing power far from doubles volume: that you need, as a rule of thumb, all else being equal, etc, 10 times the power for twice the volume.

HJM · « **Reply #17 on:** January 09, 2006, 07:05:51 AM »

Quote from: MDV

HJM: An increase of 3 db is double volume. I was under the impression that doubing power far from doubles volume: that you need, as a rule of thumb, all else being equal, etc, 10 times the power for twice the volume.

if you use dB to reference one level against another, or as a measure of doubling power you get different results. If you apply twice the number of watts you get 3dB, if you want double the loudness (sound intensity) you need 10dB, or as you say 10 times the power. So you're right.

HJM · « **Reply #18 on:** January 09, 2006, 07:14:39 AM »

Oh, as dB is a logarithmic system, if you had 14 times the power, the dB change would be 11.5dB!

This explains better than I can!

http://www.phys.unsw.edu.au/~jw/dB.html

Johnny Mac · « **Reply #19 on:** January 09, 2006, 12:43:04 PM »

I use the Koch Loadbox II. It's got loads of features.

38thBeatle · « **Reply #20 on:** January 09, 2006, 08:07:10 PM »

Hey Johnny, you'd have been at home on one of those old manual telephone exchanges. That is a great bit of kit you have there.

_tom_ · « **Reply #21 on:** January 09, 2006, 09:14:41 PM »

Quote from: Johnny Mac

I use the Koch Loadbox II. It's got loads of features.

How much does that cost? How well does it preserve the sound?

Johnny Mac · « **Reply #22 on:** January 09, 2006, 10:06:58 PM »

It does look a bit like an old exchange! :lol:

There around £245 I think. Yes the sound to my ears stays the same. Plus you have the direct outs, cab sims and a headphone socket!

Bainzy · « **Reply #23 on:** January 09, 2006, 10:17:31 PM »

Quote from: Johnny Mac

It does look a bit like an old exchange! :lol:

There around £245 I think. Yes the sound to my ears stays the same. Plus you have the direct outs, cab sims and a headphone socket!

that sounds really really cool - it might be just what I'm looking for.

_tom_ · « **Reply #24 on:** January 09, 2006, 11:13:46 PM »

Yeah it looks pretty good. I would be worried about it cutting treble/mushing stuff up though like my Weber thing does, and at £245 I could get a hotplate :lol:

Johnny Mac · « **Reply #25 on:** January 10, 2006, 05:50:32 PM »

Quote from: _tom_

Yeah it looks pretty good. I would be worried about it cutting treble/mushing stuff up though like my Weber thing does, and at £245 I could get a hotplate :lol:

Theres no mushing up with it Tom, it sounds great. I think hotplates are around the same price but i'm not sure what sort of features they have. It sounds the same thing to me. It's got plates that get hot when you crank it, you should feel the heat that comes out!!

Bainzy · « **Reply #26 on:** January 10, 2006, 06:20:15 PM »

It'd save me having to fit a DI jack to the back panel of my plexi reissue...

PUMPINGDELUXE · « **Reply #27 on:** January 10, 2006, 06:30:02 PM »

That thing looks like a beast ! were can i get one :D , and you say there just as good as preserving the natural sound as a hot plate and has more features !

willo · « **Reply #28 on:** January 10, 2006, 07:19:31 PM »

they look pretty awesome. My one concern would be how far I can stretch the cable attached to my speaker to the unit itself - the cable is soldered to the speaker and I don't want to have to change it. with a hotplate it literally was just long enough...

HJM · « **Reply #29 on:** January 10, 2006, 07:39:19 PM »

Quote from: Bainzy

It'd save me having to fit a DI jack to the back panel of my plexi reissue...

Just use a DI box, most can take the power!