You should be ok either way. V9's have a gasket that allow some flexibility in cup mounting- gives a lot more freedom vs the old v1-v8 rigid mount.

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Great job on those cups fleasbaby. I know how much work goes into finishing wood and those certainly reflect expertise. Nicely done.

Plastic tends to have low stiffness (so low resonance frequency) and high Q (level of resonance). For this reason i would shy away from it. You dont see many high quality speakers or headphones with large enclosures use plastic, its not the best for resonance. Wood or damped wood is best if (and...

Come to think of it I think Joe Grado was going for reliability and ruggedness with the choice of aluminum for the HP-1000 rather than sonics alone. This headphone was designed as a recording engineers tool, used in a sometimes hectic and fast paced recording studio. Lots of being handeled...

You may want to stick with wood ear cups. Metals have very little damping and high weight which makes them hard to use for large headphones. Some use metal outer cups with inner wood inserts, this is good practice if you want the strength of aluminum but the damping of wood. Part of the fun...

Sent you a reply.

Can you private message me? This doesn't sound like our V9's, wondering if something went wrong with the install or something is not working correctly.

Absolutely beautiful Fleasbaby! Excellent work. Great synergy going on there for sure!

:beyersmile: Amazing! Glad you guys are enjoying them!

Nice work! I'm always amazed at the ingenuity and craftsmanship of this group :) How was installing the V9's any issues inserting them into the cups? This was a big focus for this driver...

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Thats correct, they are designed to fit into the same cups.

Nice!

1/16" is probably best.