What is the correct placement of the Bose 901 speakers?

SOURCE: bose 901 series II speskers

To remove the stapled grilles, have a look at:

http://www.audio-circuit.dk/Schematics/Bose_901_I&II_SM.pdf

To go further and remove one or several drivers, remember that these speakers are air-tight (acoustic suspension); Don't break gaskets.

SOURCE: BOSE 901 ACTIVE EQUALIZER

i, trying to hook up a powered subwoofer to my hafler dh 110 and dh 500 running a bose 901 series v active equalizer and series v 901s any info would be appreciated

SOURCE: how to connect bose 901 speakers to 5.1 setup?

The solution is simple and cheaper than you think.

The analog 5.1, 6.1, 7.1 outputs on your receiver should be active even with digital inputs that you want to hear. Your receiver turns everything it processes into analog output just before the speakers anyway so there's no loss of access to multichannel sound this way.

What I did was to buy a separate amp for the 901's and feed the Front L&R analog audio out to the EQ which is directly in front of the amp. The Active EQ is only for the 901's which don't have woofers or tweeters so Bose flattened out its final response electronically with some serious boosting at both ends. Having it in line with any other speakers would feed them a grossly over-compensated signal.

Your receiver will drive the rest of the speakers.

This is the cheapest way to have your 901's and hear them, too. Since the 901's are really efficient you don't have to buy a big amp that would heat the room. I'm using a separate Carver amp with 2x100w for mine.