How to increase volume of my turntable - pre-amp - amp setup

What is gain on the ProJect Phono Box? Unless the Box has appreciably more gain than the Behringer how is that going to help?

The answers to each of the OP's questions as posted in 4th paragraph are; yes and yes.  We still don't know what AT cartridge is on the Scott TT, therefore don't know the output.

To me the only complicating issue is the relative cost of adding a vinyl system to an ultra inexpensive computer system. One that can closely match the volume levels provided by a CD player. Not that it can't be done.

Rajastrums,

You're comparing the speaker output volume between a Turntable and a CD player connected to an inexpensive multi-channel computer speaker system. Most of the feedback you will receive here is based on experience with a more typical 2-channel audio hi-fi system. Unless we have ALL of the details about your particular setup, we can't tell you exactly what's happening with your unique setup. And detailed specifications for your inexpensive Logitech computer speaker system don't seem to be readily available.

Based on the information I've seen I would say you need either more gain from your phono cartridge or your phono pre-amp. However, there is a possibility that you have a setup issue with your Logitech computer audio system. The Logitech seems to use non-standard cabling, etc., so standard hi-fi setup may not apply. 

Lastly, how do you have your phono-preamp connect to the Logitech system controller box? Which input are you using? What input are you using for your CD player (digital input or analog input?)? 

You either have a problem your the overall gain of your TT/phono setup or you may have a setup problem on the Logitech speaker system side.

Sorry to neglect this topic fora few days. I'm co-ordinating a renovation of my house. that kept me busy for a while.

mesch,

This is the cartridge i have.
https://www.amazon.com/Technica-AT3600-Standard-Magnetic-Cartridge/dp/B000A3945Y/ref=sr_1_2?s=electr... 4.2mV output

lowrider57,
"I totally agree that the Pro-Ject is the way to go. When I reread the thread I realized that the Logitech was the only source for power."

Yes it is my only power source.it has plenty for my needs.

noromance,

This preamp will boost the signal more than the Behringer I’m using now? I see that gain is 40dB for a mm cartridge versus 35 dB for my Behringer PP400.

Here are the specs;

Technical specifications

Pro-Ject Record Box E

Input capacitance/input impedance MC: 100ohms/120pF (low output MC)
MM: 47kohms/120pF (MM or high output MC)
Gain, MM / MC 40dB / 60dB
Output voltage typically 300mV/1kHz at 3mV/1kHz (MM) or 0,3mV/1kHz (MC)
Max. output 9,5V (1kHz)
Noise floor MM / MC 94dB (A weighted) / 75dB (A weighted)
THD MM / MC <0,01% / <0,05%
RIAA-equalisation curve accuracy 20Hz - 20kHz / max. 0,5dB
A/D converter Burr Brown PCM2904 16-Bit Delta Sigma
Sampling rates 32, 44,1 and 48kHz
USB output 5 pin mini b connector (USB cable supplied)
USB signal digital serial data protocol USB 1.1
Input / Line output 1 pair RCA/Cinch sockets each
Outboard power supply 18V/500mA DC, suitable for your country’s mains supply
Power consumption 100mA DC
Dimensions W x H x D (D with sockets) 120 x 32 x 100 (115) mm
Weight 250g without power supply


https://www.amazon.com/Pro-Ject-Phono-Box-Preamplifier-Black/dp/B01CZW87HS/ref=sr_1_12?s=electronics...