Additonal speaker I have a vintage McIntosh pre-amp and amplifier connected to my Bose 901series VI. Is there a way that I can hook up another set of speaker without them going through the Bose equalizer?

According to the HK site, "Stereo pre-amp outputs let you connect the receiver to an external power amplifier." So it's easy. Connect the Bose equalizer in the pre-out / amp in loop.

To setup the Bose 901's so that all of your connected equipment's sound (cable/dvd/games/stereo/etc) comes out of the 901's.
If you already have a receiver with front left and right pre-outs, I would add an amplifier. (other option is a pre-amp) Use the amplifier to create the loop the 901's need w/ their EQ and it will also add a cleaner sound and added power. That's how you can really make the Bose 901's sound amazing.

Option 1: Adding a Separate Power Amplifier - Best Option

https://deercreekaudio.com/blogs-%26-updates/f/connecting-your-eq901-to-an-audio-video-receiver-avr

This option requires that you add a separate power amplifier.

1) Connect the pre-out main left and right to the EQ901 inputs 1 and 2, and the EQ901 outputs 1 and 2 to the power amplifier inputs left and right
2) Connect your 901 speaker to the power amplifier outputs
3) The equalized signal will now play through the front left and right speaker outputs in the stereo and home theater modes.

Hi -

Sony CD player Red / White RCA - > CD input RCAs on the Arcam.

From the Arcam Preamp Output RCA's, go to the Bose "Input". From the Bose "Output", you need RCA splitters to make them into four outputs to run your amplifier connections.

If you are using the Bose Equalizer to optimize the sound of the 901s by going through either a tape loop or a pre-out/main-in loop, then the only way to do this without also equalizing the sound sent to the second set of speakers is to manufacture a "zone-2" output from the Luxman.
You'd probably need to split the send from the Luxman's pre-out before the EQ and send it to a second power amplifier for the second pair of speakers (if you want the Luxman's volume knob to control both speaker sets) or from a tape level output (if you wanted independent volume controls for the two speaker sets.
The whole EQ thing made 901s difficult to use on vintage equipment with only one "zone" audio outputs. Unless you want to use the Bose EQ on the second set, too, you can't do it satisfactorily without adding another stereo amplifier. But, go ahead and try it, you might find that you actually like the odd EQ that the 901s EQ gives to the second pair!
If it were my decision, I probably would not do it without a second amp, but it's all about what you like, my opinions really don't matter in your house, do they?
Have fun

Your instincts are correct. In fact, the only way the 901's can live in an A/V system is with dedicated amplification.

Put that old amp back to work.

This is exactly how mine are connected.

For connection I would run a pair of RCA cables from the Front L&R Audio Line OUT to the Active EQ's Line IN; then the EQ's Line OUT to a separate amp's Line IN. Attach the 901's to the new amp, run through the receiver's setup procedures for volume, etc and you're done.

If no Amp is used, connect jacks ( Left, Right) from your receiver output to Bose equalizer Input ( L, R) where it says Amplifier. Then also under where it says Amplifier, connect jacks from Output to your speakers. This would require the type of speaker wires that are RCA (plug in, red and white) on one end bare wire on the other to the speakers.
I don't know what the output is on your Kenwood, but if it's low watts, an amp is much better to crank those Bose. It's a different connect with an amp. Go L &R from the receiver to Equalizer as before, then from equalizer to amp Input where it says Tuner. then hook bare speaker wires to back of amp to Bose speakers.
You should have full use of Bose controls. The Monitor button is for an extra component that can be hooked up on the back, right side of equalizer.

Yes! When the Bose ~Steve901 first came out that was the amplifier of choice -like the McIntosh classic amps. The 901s have their own equalizer as that speaker system is a phased-array, 

one option that may yield results, since the bose connection to equalizer is presently not possible is to set the speaker out put on the denon for 'small' on all but the front speakers.
and then set the delay for all speakers based on the distance to the amp.
this should result in better audio that that with the bose eq.
will work on the issue of using the eq. with the denon if you like. but, you will likely not improve on the sound with the denon set up correctly.
good luck
mark

Option 1: Adding a Separate Power Amplifier - Best Option

https://deercreekaudio.com/blogs-%26-updates/f/connecting-your-eq901-to-an-audio-video-receiver-avr

This option requires that you add a separate power amplifier.
1) Connect the pre-out main left and right to the EQ901 inputs 1 and 2, and the EQ901 outputs 1 and 2 to the power amplifier inputs left and right
2) Connect your 901 speaker to the power amplifier outputs
3) The equalized signal will now play through the front left and right speaker outputs in the stereo and home theater modes.