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

I have been happily using a pair of Vandy 2Wq subs with single-ended M5-HP crossovers for a few years now. My system was dialed in the way I like it (bass a bit on the full side, but still tight and defined). I just had my amplifier repaired and upgraded, and the new input impedance is 22k ohms vs. the 10k ohms before the upgrade. I followed the Vandersteen recommendation for the jumper settings in the M5-HP (6 and 7 only, "on" or not open), and the bass is just about MIA altogether. As per the Vandy web site, I disregarded the chart on the case of the M5-HP and followed the chart on the web site.  Because I am an idiot, I didn’t bother to mark down the settings of the jumpers prior to changing them. Anybody have any suggestions for me that will restore the bass? I am pretty sure the issue is the jumper settings. Thanks in advance!
bondmanp
hifiman5's avatar
hifiman5
1,823 posts
 
@bondmanp   Surprised you would be so cavalier as to use the setting on the M5-HP sticker! 😈 As I posted previously, you should realize ample bass and good integration with your main speakers by setting the crossover to 10k.  You can then adjust the efficiency dial on the 2wq to tweak the subwoofer output.🎼
bondmanp OP
1,789 posts
 
@hifiman5  - Yup, I know, I live La Vida Loca.  But the Vandy web site does specifically say "when using the M5-HP with 2W series subwoofers, the sticker on the chassis should be ignored.  Set the switches according to the applicable chart below."  Unless what is meant is the V2W, I don't understand this.  Why would "2W series" exclude the 2Wq?
hifiman5's avatar
hifiman5
1,823 posts
 
The following question and answer is from "Ask Richard" on the Vandersteen website.

Roger (8/12/15): HELLO, I have a couple w2 s paired with 3Asig and a set of M5-HP filters . My questions are, are the stickers on the covers accurate for use with the 3as and is "open" on the dip switches the same as "on"? Thanks Roger

HELLO ROGER, THE STICKER ON THE COVER OF THE M5-HP IS ACCURATE FOR A 100Hz CROSSOVER (MODEL SEVEN, 5A CARBON AND QUATRO WOOD CT SPEAKERS). WHEN USING THE M5-HP(B) HIGH-PASS WITH THE 2W OR 2WQ SUBWOOFER (80Hz CROSSOVER) YOU WOULD USE ONE SETTING LOWER. OPEN IS OFF.

What Richard probably should have been clearer on is that when using the M5-HP with the subwoofers to use the settings as shown on the chart as displayed on the website.  As he did say, the sticker settings are for Model 7, 5A Carbon and Quatro Wood speakers.

mr_m
1,900 posts
 
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?
hifiman5's avatar
hifiman5
1,823 posts
 
@mr_m  Exactly!👍
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