Definitely a step up for you especially for use as a phono stage!! You will love it...totally new soundstage!
The only thing I had to recently do with my 5.5 (which is older than the 4.6 I believe) was have the volume control and selection knobs 'cleaned' they was some static when you adjusted them, but that is to be expected with something over 20 years old..no big deal to me.
I am not 100% sure, but most PS preamps from that time have the external power supply. This is crucial that the power cord be in good condition. Did you check to make sure the 4.6 comes with it, and if so in what condition??
hope this helps, older PS equipment is interestingly enough better than most of the new stuff to come out!
enjoy,
Steve
The only thing I had to recently do with my 5.5 (which is older than the 4.6 I believe) was have the volume control and selection knobs 'cleaned' they was some static when you adjusted them, but that is to be expected with something over 20 years old..no big deal to me.
I am not 100% sure, but most PS preamps from that time have the external power supply. This is crucial that the power cord be in good condition. Did you check to make sure the 4.6 comes with it, and if so in what condition??
hope this helps, older PS equipment is interestingly enough better than most of the new stuff to come out!
enjoy,
Steve