Archive | 2015

Portaphile’s Loyal Customer Discount

If you’ve purchased one of my amps before, whether from me or someone else, contact me about getting a great discount on one of my new amps.  I will need to verify that you’ve ordered an amplifier before either through my order history or some other way if you currently have one of my amps. […]

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Shohin’s dual Mono Amplifier Architecture

One of the things I’ve failed to mention about the Shohin’s amplifier design is that I’ve followed a dual mono approach in keeping each separate from one another.  BUT, I don’t like to advertise it as dual mono because for TRUE dual mono you need two separate power supplies and in a portable amplifiers that’s […]

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What’s in a Portaphile, Part III (Or what’s not….)

No capacitors in the signal path.   The bottom line is that putting capacitors in the signal changes the sound.  I don’t care how good or expensive the capacitor is, putting one in the signal path will alter the frequency response in some way.  Read up on it and you will commonly find terms such […]

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What’s in a Portaphile, Part II: 0.1% Metal Film SOIC Resistors

All Portaphile amplifiers are built using strictly Metal Film SOIC resistors inside the amplification circuitry that have a 0.1% tolerance. Resistors come in different tolerances such as 20%, 10%, 5%, 1% and 0.1%.    What the 0.1% tolerance means is that the resistor is rated by the manufacturer to vary only +/- 0.1% from it’s stated […]

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What’s in a Portaphile Amplifier? Part 1

I will begin a series of post highlighting some of the inner workings of our amplifiers.  First, let me introduce TKD, or TOKYO KO-ON DENPA COMPANY LIMITED  .  Here is an excerpt from the company’s website: “Tokyo Ko-on Denpa Co., Ltd. (hereinafter cited TKD) was established in 1944. Since then we have been manufacturing attenuators, faders, precision […]

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Post Away! Our sales depend on it!

We at Portaphile rely on our customer’s word of mouth to fuel our sales.  Please post and comment whenever possible about our products, whether posting a review at Portaphile.com or posting a review on one of the many audio forums online, please post your impressions wherever and whenever possible.  We rely heavily on customers spreading […]

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New MICRO Review, from the Philippines!

Cholo Isungga has just published his review of the MICRO on WhenInManila.com.   For some unknown reason though, it’s not showing up on the “stuff” page but Cholo has assured me it will be fully published soon.  The only way it can be found is by  clicking on this link or by using the search […]

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Shohin, a new amplifier 8 years in the making – sort of…..

The Shohin, finally, after being announced 8 years ago is finally coming to market.   In all honesty, the amplifier that I had originally planned on being called the Shohin is what the original 627 became.  So, the original Shohin has actually been on the market for while now but it was called the 627.   […]

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Shohin – Coming Soon!

The Shohin, a new portable headphone amplifier from Portaphile!  Check back frequently for updates.  I will have more details and some early bird ordering discounts posted up by Monday.

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Silver MICRO

I can  build the MICRO in all silver but my case manufacturer does not offer a good silver match for the faceplates.  Here is a picture of what a silver MICRO would look like using the case my manufacuturer offers.  If you’d like your MICRO built like this, just email me directly after you’ve placed […]

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