Friends hi-fi system not very good, what do you do or say?

There is a number of good peer reviewed articles on giving constructive criticism from a human resource perspective on the internet.  The principles apply in all situations, not only the workplace.  Constructive criticism should not criticize but rather focus on some obtainable recommendations or suggestions on how to make improvements based on your experience.   Give constructive criticism between statements of praise.  For example, state it is obvious you put much work into equipment selection.  I have found room treatment can have a significant effect on SQ and you should consider this.  Use “I” phrases is suggestion (I… think, recommend, consider, etc.) rather than “you” commands (you…should do)..Provide examples from your experience.  Be empathetic.  Put yourself in their position and think about how you would want to hear the criticism and what specific words would be most helpful to you.  Express your passion and knowledge enthusiastically without being condescending.  Constructive criticism encourages someone to learn and grow.  Destructive criticism discourages someone and makes them feel inadequate.  Constructive criticism is specific and includes action plans. Destructive criticism is vague and confusing. Constructive criticism is delivered with empathy. Destructive criticism often includes harsh and confusing language.

If my friend was happy with their system I would be happy for them.  It’s all about loving and enjoying the music.  I’ve given people advice on different equipment over the years.  Sometimes it’s for very expensive components and sometimes for a Bluetooth speaker.  I’ve shared my hobby and passion over the years and have given away a lot of equipment too.  Enjoy the journey even if it’s only a single step.  

If it sounds good, compliment it. If it doesn’t, don’t say anything—your friends probably already know. Friendship is forever, but audio systems are transient, subjective, and come and go. It’s not worth risking a friendship over sound.  "Put yourself into his/her shoes."

Per actual experiences. I've sold gear locally so in that case the buyers have been pretty transparent in asking for advice. In buying gear locally sellers are more apt to give advice vs take, somewhat ironic when I hear their system and its not up to par. If they're extremely prideful of system I'll try to hide my displeasure, if they seem open to an opinion or questioning I'll offer my two cents. I always try to pose my advice as suggestion, never want to to come across as condescending or superior.

The most curious encounters have been extremely expensive components, equipment hoarder, tons of equipment laying around unused or in second systems, and the main system sound quality is relative crap to the expense. In these cases always amazes me that some people don't believe in cables or rooms or AC quality, always something left out that leaves much untapped potential. In these cases I've made it clear they should at least consider the things they've left unattended.

My take …. A couple of things

(1) Understand your differing orbits before you compare them

There is likely a chasm between the respective party perspectives when a guest is considering expressing feedback or an opinion on the homeowner’s audio system capabilities.

Unless the homeowner is actually clearly asking for an unvarnished opinion (and can properly appreciate any constructive criticism on how they can improve it….) . Assess FIRST where the homeowner resides on the Yellow Brick Road to Audio OZ.

Mostly based on a homeowner’s resistance to opening up his budget, the guest critic’’s “not very good ..” is in constant tension with the homeowner’s position of “ ‘good enough”, with his cheerful acceptance of its present limitations, shortfalls, and warts ….fine but important distinction..

(2) Regrettably , most people can’t handle the truth …full stop.
​​​​@hilroy48 already alluded to this embedded in his witty sarcasm in his post above.

TAKEAWAY:

So choose your words wisely.

The one exception might be where you are first provoked and the proverbial gauntlet has been tossed in circumstances where the homeowner pontificates that his “race to the bottom” cheap-as-you-get it price budget system somehow meets or beats your high- end system.
We have saw these in YouTube as barkers and false prophets preaching to a very small cohort of misguided disciples.

Otherwise,,,@lanx0003 ….+1