Vandersteen 2Wq subwoofers with M5-HP crossovers - help needed

Correction. I see his amp is now at 22k. Was told you can experiment one or two steps down. Using caution of course...

The 10k setting for Bondmanp's amp would be the one step down from his 20k input imp. Just as Hifiman5 stated. That should restore the bass. One has to be careful not to go to low below the input imp. as this can damage the subs internal amplifier. This is according to Richard V.

I believe the sticker on M5-HP has settings to accomplish a 100hz crossover point, whereas the settings page for the 2W series subs is for a 80hz crossover point. Correct?

Bondmanp. No. you're not living in sin. You would make Richard Vandersteen very angry. You wouldn't like him when he's angry...lol

Please. Don't take what I said the wrong way. I have talked to Mr. V.  a few times and for the most part, he was very pleasant. We had this very discussion about the 2Wq sub I had just purchased and he got just a bit agitated about how I was going about integrating his sub with my amp. He asked me if I had read the owner's manual and I said YES. Twice! All turned out well after that.

Yes. Richard's personality is very colorful!

Bondmanp,
You mentioned dialing back one the efficiency knob back to 85db. Shouldn't you be going up to 86, 89, or 90db to produce more output from the 2Wq? That's what I did to mine to increase bass output. If I'm wrong, I have then set my sub incorrectly.

Are you sure the possible exhausted batteries can cause output level problems? I was under the impression that the batteries, like Audioquest's DBS battery packs had more to due with the dielectric of the signal thru the interconnects. More of an SQ problem. Not output.

I have a Integrated hybrid Class D amp using a 2Wq sub, (second sub coming shortly) with M5-HP crossovers, and the combination has been working flawlessly for over 2 years now. Richard V. isn't particularly fond of class D amps driving his speakers. He prefers tubes. Had this conversation with him over the phone a while back.

gdnrbob,

My Class D hybrid, is the Rogue Pharaoh. it has a 40k.input impedance, which is spot on. I talked to Richard V. about my amp and his biggest concern was if I had the proper pre in, power out connections. Which I have. His main concern for proper input impedance is not to overtax the subs internal amplifier with an incorrect crossover point. I'm not an electronics expert, but I tend to think that the only way the M-5 crossovers won't work with a given amplifier is if said amp had an input impedance outside of the M-5's capabilities for proper adjustment.

I will say I'm a bit surprised about RV's questioning of a manufacturer's specified input impedance not being as stated, specifically class D, as he never once mentioned this to me considering the multiple phone conversations we had. I also talked to Rogue's electronic engineer at length about pairing their amp and Vandersteen's crossovers and subs and he found no fault with this setup either.

Ralph Karsten is a fine designer, but the guy's at Rogue are no slouches either and have been working with Class D for quite some time. I trust their judgement as the proof is in the pudding as far as my system is concerned.

Well, there ya go....
T

Hey Bob, I guess we can agree to disagree, right? The main thing is we both love Vandersteen. It's all good my friend.
Tim

That's cool. I tend to get things backward from time to time.  :-)