These are in very good condition and use the older headband design and pads but can easily upgraded to the new one if u wanted to do so.

Excellent Seller, Fast Shipping, Would buy from Again. Thanks Tim.

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Thank you.  He has the above Amp.

I'm asking this question for a friend of mine.  He has O2 amp + ODAC with RCA in the back.  He recently asked me to build him a Bottlehead Crack and he wants to know if he can use the O2 amp + ODAC as a DAC to connect to the bottlehead crack.  Can he do that or Does he need to get another DAC...

My Speedball kit comes with these plastic things   .  I'm assuming they're thermal pad. Am I right?  Just want to be sure. Please advise,  Thanks in advance.

Can someone please tell me if this is the right octal tube socket?  It doesn't look like the one in the manual   .  My first DIY project and I just want to be sure.  Thanks in advance.

Can you elaborate JamieMcc?  I'm currently using T1 with BHC with speedball with no modification (purchased from someone here).   I like it so much so I bought a new BHC Kit with speedball (my first DIY Project), purchased Japan Alps RK27 100K Log A Volume Control Potentiometer Attenuator...

98.6 Lbs 98.7 Lbs 98.8 Lbs

Mine Serial Number 18K+ and no markings on the wires either.  I love mine.  This will be my last HP.

+1 Agreed.. I love my BHC.

+ 1 me too

Thanks for the advice, I contact seller and he agreed to give me partial refund to close the case.  He said the problem could be "radio valve"  Not sure what that means :) but i'm glad to get some money back.

Thanks Doc B.! I have another CV4003 ( No Mullard printed on tube) I bought from the same seller and it works fine.  One thing I noticed when I plugged in the two defective tubes, i see a really bright light glowing on the bottom of the tube and it gone after 5 minutes or so on both tubes...

Thanks Aeolus Kratos, Well, I guess both of them are bad then.  Is there anything I can do? Bake them in oven like someone suggested?  Do you know? Hate to throw them in the trash since seller won't accept return :)

Hi Guys!   Can any of you tell me if I could use these tubes with BH Crack w/ Speedball? I'm asking because the right speaker is dead when I plugged in the tube, both of them.  Bought these off eBay and seller stated they're NOS. Thanks in advance.    

Thanks guys! I find the T90 sounds really good "out of the box", as good as my HD 700.  Hopefully It'll sounds better after burn in.  I just need a reason to let the hd700 go :)

Just curious, What is the normal burn in time for t90?  Thanks.

I decided to pull the trigger after reading his review.  I'm currently using the hd700 with BH crack w/ speedball and Schiit Bifrost w/ Uber. They do sound  good but I want to try something different.

Just bought Beyer t90 off eBay.  Hopefully they'll sound better than the HD700 I'm currently using.  I need a pair of HP with more bass.