bass = DAMAGE TO GT-PRO's preamp stage?

[skultrap]

This guy told me that I should completely avoid using my bass, vocal or keyboards on my GT-PRO....

I've only tested my microphone on the GT-PRO for half an hour, at low vollume...

But apparently. using low impedance instruments could damage stuff like your rack or guitar pedals...

Could someone please help me elaborate on this? I kinda freaked out now, since I always experiement around with my gear. Hahahah.

[skultrap]

16 views and no one has anything to say?? :/

[Mick-tallica]

ive been using my bass with the Pro, and havent noticed anything abnormal going on

[Evilution]

Ive never heard about that before,sure it wasnt an Aprils fools ? :wink: to me it actually just sounds like bull**** ,i mean amp input jacks are usually shorted to ground when the guitar is unplugged ,if that isnt a low impedance i dont know what is.

Outputs on the other hand is a whole different story as you may probably fry some part of the output stage if you connect something with too low impedance,that also goes for poweramps of course.

With that said i and the other guitarplayer in my band who also uses the Pro have made the misstake of connecting the guitar to the headphone output a couple of times without anything happening to the Pro.

A bass should certainly work well on the input at least.

[glennfin]

The only thing you shouldn't plug into the input of your GT-Pro is a speaker output or headphone output from something......

"this guy" is wrong.




This guy told me that I should completely avoid using my bass, vocal or keyboards on my GT-PRO....

I've only tested my microphone on the GT-PRO for half an hour, at low vollume...

But apparently. using low impedance instruments could damage stuff like your rack or guitar pedals...

Could someone please help me elaborate on this? I kinda freaked out now, since I always experiement around with my gear. Hahahah.

[Evilution]

The only thing you shouldn't plug into the input of your GT-Pro is a speaker output or headphone output from something......

"this guy" is wrong.




This guy told me that I should completely avoid using my bass, vocal or keyboards on my GT-PRO....

I've only tested my microphone on the GT-PRO for half an hour, at low vollume...

But apparently. using low impedance instruments could damage stuff like your rack or guitar pedals...

Could someone please help me elaborate on this? I kinda freaked out now, since I always experiement around with my gear. Hahahah.

Yeah definately a speaker output connected to the input would be bad news, a headphone output on the other hand may or may not be bad in some cases,i guess better safe than sorry,i have on the other hand used a headphone output as a line output with succes a few times,not together with the pro though.

[skultrap]

well the guy is studying electroacoustics in university and he's a huge gear freak. he uses pedals with his keyboards and many times he tells me that the the pedals eventually lose "tone" due to all the abuse from his low impedence keyboards.

I mean, if using low impendance gear such as a keyboard or bass on a guitar amp isn't a problem, why would they make low to high impedence converters?

The GT-PRO is a great gear. I currently use it to record my guitar tracks which definitely saves a lot of cash right now, since I don't have to spend lots of cash on mixers and DIs. If I could record digitally direct to my pc using a mic or keyboard without any risks of damaging the preamp, it would be great.

I don't know. When he mentioned about the preamp "wearing out", it just kinda scares me, since this is a 1000$ unit after all.

And I doubt it was an april fool's joke. He's very, very serious when it comes to sound. A student of electroacouistics!

[Evilution]

Well this puts the bass issue to rest at least http://www.bosscorp.co.jp/products/en/_support/faq.cfm?iCncd=691&FAQ=EN04-07185&dsp=1&ln=en&iStcd=4.

I have never heard that using equipment of different impedance would damage the input stage of audio equipment,sure you may get a signal that is weak because of the mismatch.

It certainly doesnt worry me at least and i do know a bit about electronics after working in the business for over 18 years ,at the moment as a service engineer,i have also been playing guitar for nearly 25 years and had experience with a few pieces of equipment.

Im not saying that my words are "the law" and that i know everything in this world ,im just saying that i myself dont belive there is a problem .

[skultrap]

thanks for the confirmation. whew.

off I go plugging in my mic!

[glennfin]

As a general rule, the input of a device should be a higher impedance than the output impedance of the device that's feeding it.

Low to high impedance transformers are for using low impedance microphones (200-600 ohms) on very high impedance inputs like guitar amps (10 meg ohms) using a transformer with a microphone changes the balanced low impedance output of the mike to a higher level unbalanced output for use with very high impedance inputs like the GT-pro guitar input.

Line level devices like keyboards are typically 1k output impedance. The problem isn't impedance matching, it's the difference in gain. Line level outputs are a very high level compared to a guitar. You won't damage anything and you won't wear anything out...but you will certainly overload (distort) the input stage of a device like the GT-pro that's normally expecting to see a level from a guitar of aprox 100mv.



well the guy is studying electroacoustics in university and he's a huge gear freak. he uses pedals with his keyboards and many times he tells me that the the pedals eventually lose "tone" due to all the abuse from his low impedence keyboards.

I mean, if using low impendance gear such as a keyboard or bass on a guitar amp isn't a problem, why would they make low to high impedence converters?

The GT-PRO is a great gear. I currently use it to record my guitar tracks which definitely saves a lot of cash right now, since I don't have to spend lots of cash on mixers and DIs. If I could record digitally direct to my pc using a mic or keyboard without any risks of damaging the preamp, it would be great.

I don't know. When he mentioned about the preamp "wearing out", it just kinda scares me, since this is a 1000$ unit after all.

And I doubt it was an april fool's joke. He's very, very serious when it comes to sound. A student of electroacouistics!