Archive | 2016

Portaphile NOK “Nude OverKill” Update

Thank you everyone for your patience in allowing me to get the amplifiers designed, built and shipped out within the planned time frame.  I am currently expecting to ship during January 2017.  I am still machining the cases and as I had anticipated early on, that is my bottle neck in producing the NOK.  The […]

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First Listen: NOK aka Nude OverKill

There’s a good friend of mine that does me the favor of listening to my creations from time to time to provide some valuable feedback in the design process.  I’ve learned to trust his ears and appreciate his poetic way of describing what he is hearing.  I’ve asked his permission to post some of this […]

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Portaphile NOK aka “Nude OverKill” Case Rendering

Here’s a quick rendering of what the case is going to look like.  I should have the first one going out for annodizing next week and I should be posting pics of the complete first amplifier the week after.  Things are moving along pretty well.   This pic shows just the case without any of […]

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Portaphile NOK aka Nude OverKill RCA Inputs

I have been getting so much interest to include RCA inputs on the final NOK that I’ve decided to make it standard on the final version.  The NOK will have both a 1/8″ mini jack for both input and output and RCA input jacks to allow easier connection to the Chord Hugo via RCA’s.   […]

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Portaphile NOK “Nude OverKill”

Here’s a teaser pic of the inside of the upcoming NOK.  This test board is still missing the gain switch and Vishay Z-Foil “Naked” resistors in the two step attenuator.  Abosolute resolution is probably the best way I would describe the sound this amplifier is capable of reproducing.   The Z Foils are able to […]

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Portaphile NOK aka “Nude Overkill”

I thought it’d be a good time to release a bit more information on the Portaphile NOK.  The Portaphile NOK will be based on the three channel amplifier architecture found on the 627 line of amplifiers.   It will have three OPA627BM followed by six LME49600 buffers, two per channel.  The OPA627BM is the higher performance […]

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The New Shohin “Can” Amp w/OPA627BM

The New Shohin will soon be available with the higher end can version of the BurrBrown OPA627, the OPA627BM.  With it’s Dual-Mono amplifier topology, high end thin film resistors throughout, 20Vpp power supply and dual “high performance, hifi, high current headphone buffers” this is one killer headpone amp that takes advantage of the additional performance of […]

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Vacation Time!

I will be out on vacation from June 30th through July 20th and will not be able to ship or build amplifiers during this time.  If you’d like to order an amplifier before I leave, please place your order this week, before June 20th, so I can have time to build your amplifier and have […]

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The Portaphile V2, V2^2 and Maxxed Upgrades

I recently had a customer send in a Portaphile V2 for some repair work and while it was in the shop I decided to offer him an upgrade path.  The original Portaphile V2, V2^2 and Maxxed versions all share a very similar amplification section as the current lineup (627, MICRO and 627X), the main difference […]

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Portaphile NOK aka “Nude Overkill”

Well, I thought I’d let out some more info on the upcoming Portaphile NOK.  The NOK is short for “Nude Overkill” and without going too much into the specifics yet I’d like to disclose that the overkill comes from some upgraded parts that some out there would consider to be overkill for a portable headphone […]

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