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Mystery with woofers. Help!

I am the proud second owner of three-way, sealed design, YG Hailey 1.2’s, and have enjoyed them immensely. They make plenty of articulate bass, provided that the recording is up to snuff. The bass is supplemented by one Rythmik sub, crossing over at 50hz.

Over time, I have noticed almost zero excursion/movement from the woofers so last night I decided to get down and put my ear/hand up to the woofers and it seems like NOTHING is coming out of them, even at pretty high playback levels. Again, my curiosity was not piqued by a lack of bass during listening, but rather, the lack of any visible movement from the woofers. Am I missing something? Fwiw, I am feeding the YG’s with Pass X260.8 monos, connected to the upper speaker terminals. Thoughts?

willyht
bache's avatar
bache
525 posts
 

Check impedance for both speakers left and right using multimeter . must be same. if nor remove the woofer from Loudspeakers and check impedance the  woofer alone and you see the issues 

willyht OP
61 posts
 

I think the answer is simple---I need jumpers!!! The woofer section isn't powered up! Duh. I feel like an arse, but the question remains---why does the bass sound adequate without the woofers powered up and sub disengaged?

erik_squires
16,186 posts
 

Room.  The room gain can do a lot. 

And woofers stop working for all sorts of reasons.  Shipping can disconnect a wire or (my fave) break an inductor's connection right at the circuit board. 

Of course, next time you have this problem grab a 9V battery to see what is and is not moving. :)

thecarpathian's avatar
thecarpathian
4,532 posts
 

Perhaps the bass sounded adequate because they were acting  like passive cones.

knotscott
948 posts
 

If the info I ran across is correct, that midbass crosses over to the woofer at 65 hz,so it’s actually producing all but the lowest frequencies of bass, which your sub is covering. If you ended up plugging the woofers back in, you may want to adjust the output of your sub.

There are pros and cons to every speaker design choice, but I’m a fan of those crossover points because it puts the whole vocal range in the midbass driver vs splitting it between the woofer and midrange driver. Nearly exactly how my speakers are designed.

p.s.: that crossover point is very conducive to bi-amping.  I'm running tube amps on the midbass and tweeters, and a SS integrated amp to the woofers...best of both worlds.  

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