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Sounds levels... power, dB and clean boosts

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Following on from Brian’s video about wattage/power/dB, I thought I’d share something that has happened to me recently that has confused me considerably, until I quizzed Brian about it in regard to the video (released 26th Feb 2019, you can see it below).

Like I’m guessing some of you, I’ve been blissfully ignorant of almost everything to do with the whole power thing until that video, it wasn’t a conscious ignorance, but one that I’d never really thought about before, and the question came extremely pertinent once I’d started messing around with digital control of effects.

For the band (we have no sound guy) I run a clean boost at the end of my chain so I can make sure my solos are lifted above the general mix of the band. When I was using a regular pedal booster, I found I had to find the sweet spot that boosted the solos manually, which meant I often had to change it according to my tone. What I found was that my clean solos weren’t as prominent as my dirty ones. I had no idea why, I just thought it was one of those things. It wasn’t much of a turn of the knob, but enough to warrant it…. Once I started using something that was digital I noticed that the actual increase was huge depending on what effects I was using.

Before I go into it properly, here is a run down of my tone and how it is made. I don’t run my rig bass heavy, and it’s not overtly bright, but it’s definitely not the same as when I play at home. This is obvious, because at home you are hearing everything in a sterile environment and you want to enjoy the full scope. When you are live, you need to leave room for the others in the band… so, I don’t encroach on the bass player and I also like to leave room for the acoustic guitar to shine through, so my place is pretty well in the middle and the amp is set as such. My clean tone is never totally clean, a Tumnus at 9 oclock gain and treble at 12 is the best way to describe it with unity level. My main OD is the Pantheon, set at a nice break up – 18v, lowest gain setting with the gain at around 2 oclock… bass and treble are both about 10 oclock, presence all the way off. When I want more grunt for it, the K style drives the Pantheon and it is quite gainy. This is also my main dirt solo tone… when we do the rocky stuff, the Pantheon/Tumnus is the rhythm tone and I bung a TS between them, set at higher output than gain, with a little tone control boost. My rhythm sounds are all pretty unity, none are ‘louder’ to the ears than the others.

Here is the issue, when I wanted to boost the solos for the dirtiest tones, I need just under 3dB to get to the level. About 5dB for when the TS isn’t on, and upto 10db when it’s clean. And yes, this confused the living daylights out of me! 

Here is what is happening… and how it also ties in with bDub’s video about power/wattage/dB.

Everything is relative to the EQ of what you are hearing.

When I am boosting the clean tone, it’s about as full range as I can get. There is a slight 1k hump due to the K style pedal being bought in, but it’s not huge. So, when I am boosting that signal, my ears (that are tuned to hear human speech – between 1k and 5k) say I need a lot more power because it’s also boosting the lower frequencies a lot, as you know, bass takes a lot of power, so it’s needing a lot more literal volume to boost it to the level my ears are telling me is an acceptable volume. When the Pantheon and the K style are on, the mids are more focused due to both the circuits being on, so my ears are picking up on the frequencies more as the bass is kinda removed, so it needs less. When I have the TS on as well, that’s three circuits that are pushing the frequencies my ears already picks up on, so it needs even less.

All this for the same physical level of sound, according to my ears. 

Once you put this in with the points bDub was making in the video, the physical level of sound cannot directly be related to either the wattage the amp is claimed to sit at (in my case either a Fender BDri or Quilter 101R (on the smaller gigs where I can’t get the amp to it’s sweetest spot), or the dB coming out, or change of dB within the chain. Because EQ and headroom change everything completely. Before you are even hitting the amp, the levels are all over the place so the output of the amp, in terms of actual volume, are going to be wildly different…. And I didn’t even mention that on the clean stuff the pickups on my Brent Mason PRS are tapped for single coil sound and the dirty stuff is often on HB… as the HB ones need about 1dB less of boost, despite to the ears there being NO level drop between the two (one of the main selling points of the PRS BM model).

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Read 1886 times Last modified on Wednesday, 27 February 2019 18:19
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