newbie seeks help with system design


Hello! I come to you to humbly ask for help getting myself set up to listen to and eventually stream vinyl without breaking the bank. I have inherited the following components:

B&O Beogram 3404 turntable
Acurus Line Amp L10
Bryston Stereo Amp 2B
a pair of AR 15 speakers

I think I still need a phono amp even to simply listen to vinyl. For that purpose, I'm considering a Pro-Ject Phono Box DC Phono Pre-Amp. As for streaming, I think the Sonos Port will get me there, although if I want to replace my Acurus and Bryston then I could go for the Sonos Amp. I would consider this strategy if the quality of the Sonos amp so far surpasses the Acurus and Bryston as to justify it. Does it? Am I going about this correctly? Can you point me in any further directions in terms of good but not crazy expensive phono amps? Any other suggestions?

Thanks for your time!

-Alec
alecberlin
Honestly, being as it is B&O then I would call Peter Ledermann at The Soundsmith as he is probably the man in the country to see about that particular cartridge. Because in your case you have what you have and don't want to have to buy anything you don't need. The cartridge in that case determines somewhat the phono stage. Ledermann also does repair and refurbishment and may even have a phono stage in stock. You never know. At the very least you will be talking with one of the giants in the field. 
https://www.sound-smith.com/lookup/bo-cartridges/133

Other than that all I can say is set your budget, make sure you have enough cartridge output for the phono stage, then pay attention to listening impressions more than anything else, and don't forget to include a decent quality interconnect in your budget.
The Project Phono Box is a good phono stage for your system. Don't replace the Acurus/Bryston pair! Sonos is good for streaming only! You might consider adding a better cheap DAC later (Topping D30 - $300). Cables and speaker wire can be entry-level Audioquest or Kimber.
Would not hurt to follow the advice provided by millercarbon. Cartridge output + phonostage gain = desired output. 
HI,
Consider checking your tt first as it is in its third decade. Check what cartridge model it carries and investigate for its replacement stylus, some of their mm designs are pretty good and a perfect match for your arm.