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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Installed Sound/Contracting => Topic started by: andy craig on September 21, 2021, 09:26:50 PM

Title: +50dBu
Post by: andy craig on September 21, 2021, 09:26:50 PM: I received a tender document which calls for the supply of DI units which can handle an input signal of +50dBu.
I can't imagine a situation where you would ever want to deliver mains voltage to a DI, but, I'm not a consultant.

andy
Title: Re: +50dBu
Post by: Brian Jojade on September 22, 2021, 04:21:50 AM: Well, you don't WANT to do that, but if some numbnutz ties 240 into an XLR line, you can rest easy knowing you DI can handle it.
Title: Re: +50dBu
Post by: Helge A Bentsen on September 22, 2021, 02:41:16 PM: Well, it's "only" 7500W/8 ohm. Maybe someone is using it to record the output of a Powersoft X4L? :P
Title: Re: +50dBu
Post by: Mac Kerr on September 22, 2021, 04:15:24 PM: Quote from: Helge A Bentsen on September 22, 2021, 02:41:16 PM
Well, it's "only" 7500W/8 ohm. Maybe someone is using it to record the output of a Powersoft X4L? :P

But what is it at the 10k-100k the DI actually loads the amp with?

Mac
Title: Re: +50dBu
Post by: John Roberts {JR} on September 22, 2021, 04:43:44 PM: dBu is a voltage relative to 0.7746 Vac. +50dBu is like mains voltage in Europe, or UK, or Oz....

Silly

JR
Title: Re: +50dBu
Post by: Ivan Beaver on September 22, 2021, 07:46:39 PM: Quote from: andy craig on September 21, 2021, 09:26:50 PM
I received a tender document which calls for the supply of DI units which can handle an input signal of +50dBu.
I can't imagine a situation where you would ever want to deliver mains voltage to a DI, but, I'm not a consultant.

andy
Do they give a representative model number?

Sometimes people specify products that are not made. Sometimes to weed out people who don't understand.

I had one case years ago in which I got the job, simply because I called and questioned the spec.

The "designer" said that I was the only person who understood how crazy the spec was, and called to question.

Others just overlooked it and didn't care.

Kinda like brown M&Ms on the staging rider
Title: Re: +50dBu
Post by: John Roberts {JR} on September 22, 2021, 08:55:11 PM: What do I get if I make a DI that handles +50dBu ?

JR
Title: Re: +50dBu
Post by: Tim Hite on September 23, 2021, 01:45:36 AM: Quote from: John Roberts {JR} on September 22, 2021, 08:55:11 PM
What do I get if I make a DI that handles +50dBu ?

JR

110v out the other end?
Title: Re: +50dBu
Post by: Tim McCulloch on September 23, 2021, 02:01:49 PM: Quote from: John Roberts {JR} on September 22, 2021, 08:55:11 PM
What do I get if I make a DI that handles +50dBu ?

JR

The Man o' War Prize. ;)
Title: Re: +50dBu
Post by: Henry Cohen on September 23, 2021, 05:56:33 PM: Quote from: John Roberts {JR} on September 22, 2021, 08:55:11 PM
What do I get if I make a DI that handles +50dBu ?

Hand warmer?
Title: Re: +50dBu
Post by: John Roberts {JR} on September 23, 2021, 07:04:47 PM: I can make it handle that input level, output level not so easy...

JR
Title: Re: +50dBu
Post by: Lee Douglas on September 24, 2021, 07:57:40 AM: Quote from: Brian Jojade on September 22, 2021, 04:21:50 AM
Well, you don't WANT to do that, but if some numbnutz ties 240 into an XLR line, you can rest easy knowing you DI can handle it.

I keep picturing a cam lock to XLR adapter in my head.
Title: Re: +50dBu
Post by: Brian Jojade on September 25, 2021, 10:02:20 AM: Quote from: Lee Douglas on September 24, 2021, 07:57:40 AM
I keep picturing a cam lock to XLR adapter in my head.

;D
Title: Re: +50dBu
Post by: Daniel Levi on September 25, 2021, 01:49:39 PM: Quote from: Brian Jojade on September 25, 2021, 10:02:20 AM
;D

I wanted and Electret mic, AN ELECTRET MIC YOU FOOL, NOT AN ELECTRIC ONE!