having a Problem with my STC 3 onboard preamp

[Bee]

hi all.....

I have a problem with my STC 3 preamp, it has a little noise,should it be like that???....

the installation process was find, just like the wiring instruction that the web given, my bass to my cables & amps they were just in their best.

when I connect my bass ---> DI BOX---balanced out---> amp its sound good but a lot of noise,

the noise looks so real.... I just can believe my ears, would you tell me why it happens?..... what should I do?.....

thanks

 

[Funkfingers]

Re: having a Problem with my STC 3 onboard preamp

The pre-amp stage in active instruments emits a constant, low level background hiss.

If you run active pickups into an active EQ system, that is another opportunity for hiss.

What impedance level range is your DI box expecting at its input socket? You could have a level mismatch.

 

[Bee]

Re: having a Problem with my STC 3 onboard preamp

Hmmm.... I see....

I use PROEL DI box from Italy, now this is the data of the product, please tell me if something mismacth

TECHNICAL SHEET
Construction materials: Galvanized metal chassis with antiskid
Width: 148
Height: 43,8
Depth: 135
Weight: 0,85
Inputs: n.1 mono jack socket ø 6.3 mm
Input Impedance: 1 MOhm (normal) - 10KOhm (pad)
Outputs: n.1 mono jack socket ø 6.3 mm
Output Impedance: 330 Ohm (balanced) - 2200 Ohm (unbalanced)
Frequency response: 20Hz - 20kHz (+0 -2dB)
Controls: Interruttore di selezione ground/lift
Distortion (THD): < 0.025% (gain 0 dB)
S/N Ratio: 100dB (0dB gain)
Power Supply: 12 Vcc - Jack socket ø 2.1 mm.
Phantom power: +15/+48 Volts with 1mA @1100Ohm
Battery: n.2 9 Volts batteries
Master pack: 1 pcs