Dear Fundsgon: According to Velodyne the SMS-1 has a fixed ( 80 hz. ) high-pass ( http://www.velodyne.com/pdf/sms-1/sms-1_guide.pdf ) so you can roll-off the bas in your SF speakers and use it with two Rels or the other option you named: two Velodynes.
I never heard that REL model but we have to take in count the very good quality sound on those SF ( I owned one of its first monitors and were impressive: Extrema. ) and IMHO the Velodynes could match in better way the SF quality performance level but all depend on yoor targets/priorities.
Regards and enjoy the music,
R.
I never heard that REL model but we have to take in count the very good quality sound on those SF ( I owned one of its first monitors and were impressive: Extrema. ) and IMHO the Velodynes could match in better way the SF quality performance level but all depend on yoor targets/priorities.
Regards and enjoy the music,
R.