Bose 901

i still have my 901 series 2 that i bought new back in the day! i'm not picky about sound but they're ok for me!

Anything yesterday is History.

My 40 year old speakers still sound good today.

So here's my take on the Five 901's I own (all Series 1 and 2). The Series 3 - 6 are plagued with the foam rot that most Vintage 1970's/1980's Speakers are guilty of. But who the Hell want to re-foam the surrounds on 18 4.5" Drivers.

I removed the ugly grill cloth, and replaced them with clear acoustically transparent black grille cloth. All Series 1 & 2 do not suffer from foam rot but the discrete active EQ's that I rebuilt were always plagued with low level hum no matter how I star GND'd everything.

My 901's are placed far way from room boundary walls and 18'' in front of the wall bend them. The Surround 901's are placed beside my Sofa and they work great as Surround Speakers. The front L. C. R Speakers are equidistantly spaced 7ft. apart from each other (14ft. from the L to the R Speaker).

Running the analog EQ's  and true balanced (using a Stereo Box to run one 901/PS Audio M700) helped Bass Definition and Midrange presence. But the best results I've had are Balanced 2x4 MiniDSP boards with a Series 2 EQ curve that I put together. I've had many "Audiophiles" hear my rig and never knew 901's could sound that good.

All High's, nice Mid's, deep Bass....It must be Bose !

https://photos.app.goo.gl/vbM2Xci5yeaxDwzp6

https://photos.app.goo.gl/Hd42DeNL9bkz6naa6

IM distortion, out the butt, per the AES!      I could not agree more,  elliottbnewcombjr!                   https://www.audioasylum.com/cgi/t.mpl?f=hug&m=178429