Believe it or not 10 - 15 years ago USA made amps were probably the best in the world.
Out side testers like Auto 2000 gave full results and evaluations . Now most are build in asian countries, what a shame. Ledgendary companys like RockFord fosgate.
Power of an amp is not the only thing , there are also manyyyyyyyyyyyyyy other factors in selecting an amp. I could write a book.
But ill bet my 1997 USD made Soundstream amps against any amps of today , period.
Head units were at their peak then to for specifications and they have only gone backwards
Again ill put and bet anyone to ever challenge my 15 year old Apogee D/A converter. Simply the best it the world.
Only thing is at that time i payed $6000 USD whereas today you can buy them for only $800.
Car audio is not witch craft , its full of bull**** marketing and reps only wanting to sell their product with exaggerated claims.
While i was taking a break b/w my chosen field i was a rep for an auto shop.
Word got around and in only 2 months sold $200,000 of audio gear !!!!!!!!!!!
Why ? because i showed them the truth in between the bull****.