› Forums › Music › Sound Engineering › using a parametric EQ and what it does
- This topic has 13 replies, 3 voices, and was last updated June 15, 2012 at 4:00 pm by DaftFader.
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June 15, 2012 at 10:37 am #1053261
found this on a English PA hire site. although aimed more at live sound reinforcement the principles are the same. Don’t be frightened by the maths halfway through, you can either just go to the next paragraph although to be fair the maths is explained simply there, you would only need a scientific calculator. (I could work through it, it would take a fair while though) – I am no maths genius, my view on it is that hard sums are something computers are way better at doing than me 😉
June 15, 2012 at 10:54 am #1254745Wow cool awesome. Thanks for that, let me give you a virtual kiss :flowers:
June 15, 2012 at 10:57 am #1254746My mate had an EQ on his rig but i’m not sure if it was a parametric EQ. I used to let him do the tinkering, but even he didn’t really know exactly what he was doing. The best we ever had it sounding was when we got this heavy metal guy who went by the name of wolfman. And we let him loose in the lock up one afternoon and he had them sounding fucking great. The speakers where them big ble turbosound square like cabs. they sounded great but were lacking in bass a little. We had for of them so partys were good with them.
One thing this wolf man did say was that Iron maiden used to used the same speakers but they used lik 20 or 30 or something. Not sure how true it was though.
June 15, 2012 at 11:02 am #1254747I may try and find out the truth about iron maiden now actualy
June 15, 2012 at 11:08 am #1254748Yes it is true
[ATTACH=CONFIG]82315[/ATTACH]
But the block my mate had were made up of 2 of these single units. so they were more or less square. They were so awesome. they even had little doors at the back when the sockets would be hidden away.
June 15, 2012 at 11:12 am #1254749Ahaa got it these were the buggers
[ATTACH=CONFIG]82316[/ATTACH]
Wouldn’t you love it if this was your wearhouse
June 15, 2012 at 11:18 am #1254742these wolfman chaps are worth taking advice from when it comes to good sound and also the old boys what like prog rock.
Bear in mind when they grew up a 100W PA was loads and a DSP for sound would be a entire 48U rack full of kit (not exactly portable) so you had to get the best out of less, and thus aren’t so distracted by all the fancy buttons and lights on modern kit. there are loads of ’em round here what work for or used to work for British Telecom – though many have shaved off their beards (if they had one) to avoid looking too grey because the rest of their hair has also thinned.
EQ and compressor are often way overused these days, and small knobs mean its easy to put on too much..
Actually one of my friends from there wrote a really good load of free articles, I’ll dig them out again. He doesn’t have a beard (probably to look younger as I didn’t realise he was near or over 50, thought he was my age) but is very brainy and was a former BBC techie as well..
June 15, 2012 at 11:43 am #1254750@General Lighting 483915 wrote:
these wolfman chaps are worth taking advice from when it comes to good sound
EQ and compressor are often way overused these days, and small knobs mean its easy to put on too much..Indeed. He knew the system well because he worked as the sound engineer at the Concorde 2 club which was where the sound system originally came from. But the amp and EQ rack wasn’t from there so it stil took him some tinkering. When he bought them he got 6 o the blocks but 2 of them were seriously fucked up so we just used the 4 of them.
Speakingof amps and EQ’s having small knobs, we had this one amp where it had no actual knob sticking out, it just had a dial flush with the face of the amp and a slit in the middle do you would have to use a screwdriver to turn it up and down. I always thought it was a absolutely stupid idea.
June 15, 2012 at 1:19 pm #1254753@thelog 483926 wrote:
Indeed. He knew the system well because he worked as the sound engineer at the Concorde 2 club which was where the sound system originally came from. But the amp and EQ rack wasn’t from there so it stil took him some tinkering.
He would had to of set the sound up differently as soon as the speakers left the room the originally were in as he would of been taking acoustics into account as well when adjusting the EQ.
@thelog 483926 wrote:
Speaking of amps and EQ’s having small knobs, we had this one amp where it had no actual knob sticking out, it just had a dial flush with the face of the amp and a slit in the middle do you would have to use a screwdriver to turn it up and down. I always thought it was a absolutely stupid idea.
You sure that wasn’t the fuse?
June 15, 2012 at 2:05 pm #1254743@thelog 483926 wrote:
Speakingof amps and EQ’s having small knobs, we had this one amp where it had no actual knob sticking out, it just had a dial flush with the face of the amp and a slit in the middle do you would have to use a screwdriver to turn it up and down. I always thought it was a absolutely stupid idea.
some are built like that deliberately. its not the best for a live sound system, but where the amp is in a static location at the other end of a long balanced audio cable and the volume is controlled from elsewhere that control is only used to set a max voume so it does not blow the speakers nor blast folks ears. Common practice in places like University media studies departments and radio stations…
June 15, 2012 at 2:30 pm #1254751June 15, 2012 at 3:45 pm #1254754I’m actually being serious as one of my old power amps has exactly the same thing and it houses the fuse’s for each channel. 😉
June 15, 2012 at 3:59 pm #1254744@DaftFader 483962 wrote:
I’m actually being serious as one of my old power amps has exactly the same thing and it houses the fuse’s for each channel. 😉
to be fair such fuseholders do exist, there are two on the battery of my e-bike and a similar one on its charger. They are less likely to get knocked and bust open or come adrift as similar ones that can be removed by hand which makes sense on kit that is constantly being transported and exposed to harsher conditions. As the same time they make it difficult to end up being exposed to open contacts carrying high voltage or currents (even low voltage high current can set a big fire)
June 15, 2012 at 4:00 pm #1254752@DaftFader 483962 wrote:
I’m actually being serious as one of my old power amps has exactly the same thing and it houses the fuse’s for each channel. 😉
Oh right. (DOHCANO) nah these were the actual dials.
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› Forums › Music › Sound Engineering › using a parametric EQ and what it does