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The Portable Micro Amp

headphone amplifier

Owner’s Manual

Toll Free: 

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Phone: 

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Fax: 

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2020 

Gilkerson 

Drive

Bozeman, 

MT 

59715

w w w . h e a d p h o n e . c o m

Congratulations on your purchase of the HeadRoom Portable Micro 

Amp!  This little gem is a very deliberate blend of audiophile quality 

parts, a road-worthy aluminum & urethane enclosure, a serious battery 

and recharging circuit, plus a well-conceived set of travel accessories, 

all tightly focused on getting you great access to your tunes whether 

they live on an iPod, laptop, or any other type of portable audio player. 

Available with or without internal DAC, the Micro Amp is sure to deliver 

all your favorite tunes, anywhere; anytime; 

Right Between Your Ears.

with internal DAC option

Summary of Contents for The Portable Micro Amp

Page 1: ...em is a very deliberate blend of audiophile quality parts a road worthy aluminum urethane enclosure a serious battery and recharging circuit plus a well conceived set of travel accessories all tightly focused on getting you great access to your tunes whether they live on an iPod laptop or any other type of portable audio player Available with or without internal DAC the Micro Amp is sure to delive...

Page 2: ...2 The Micro Portable Amp 1 Line Input 2 Headphone Out 3 Crossfeed Switch 5 Volume Control 6 Power Source Switch 4 Gain Switch ...

Page 3: ...ng experience See pg 7 for more info on the HeadRoom crossfeed 4 GainSwitch The 3 position GainSwitch accomodatesvariousheadphones power needs For instance the Low Gain setting would be used for ear canal headphones which are extremely efficient allowing a larger range on the volume control pot Experimenting with your headphones and the Gain Switch will help you to determine which setting you pref...

Page 4: ...4 The Micro Portable Amp 1 Power Input 4 Pre Amp Output 2 Optical Coaxial Digital Input 3 USB Input DAC Option Inlcuded recharging power supply ...

Page 5: ...is input signal from the optical output of your player Not so many portable audio players have optical outputs anymore but many portable DVD players and some hard disk drive players do Of course a co axial output is available from many pieces of home equipment See pg 9 for more hook up information 3 USB Input DAC Option Only The USB input gets its signal from a computer laptop desktop or Ultra Mob...

Page 6: ... AD8397 op amp in output stage with DAC option USB optical coax inputs 16 to 24 bit operation 32 44 1 48 and 96kHz input sample rates 2 0 Vrms maximum line level output 4 2V Analog operation Independent low noise regulation for digital and analog sections of mixed signal devices Analog Devices AD823 for analog output stage PCB designed with both high speed digital design techniques and low noise a...

Page 7: ...ng from when only one ear is hearing it This tends to create an audio image that is a blob on the left blob on the right and a blob in the middle HeadRoom amplifiers cure the problem by allowing you to cross feed a little of the left and right channels across to each other through a short time delay using the crossfeed switch The usefulness of the circuit varies depending on what type of recording...

Page 8: ...urce with line out or headphone jack Source with RCA outputs Now for the best part simply plug your headphones into the head phone jack one on the front of the Micro Amp be sure to turn the vol ume down first If your headphone jack is a 1 4 termination or if you need to power more than one pair of headphones please see our expla nation in 1 on page 2 line input Home CD player with RCA outputs Port...

Page 9: ...opriate optical cable and a Toslink Optical Mini Adaptor visit headphone com to purchase these items Plug one end into your source and connect the other end into the adaptor then into the back of the amp Coaxial cable Coaxial to mini adaptor To A home CD player or other device with a Coaxial Output You will need a coaxial cable and a RCA Mini Mono Adaptor visit headphone com to purchase these item...

Page 10: ...ix it while you ve still got the product everyone s happy Portable Micro Amp Warranty The HeadRoom Portable Micro Amp is warrantied for two years Battery replace ment on the Portable Micro amp is warrantied for one year After one year your battery will replaced for a small fee If anytime within the first two years of your purchase you have a problem with your Portable Micro Amp you can return it f...

Page 11: ...ng with a return shipping label and a card to include with the defective item to return to HeadRoom Important Fill in your name and original invoice number of your order on the card and return the item to HeadRoom within 2 weeks If we have not received the product after 2 weeks allowing shipping time we will charge your credit card the amount of the defective item Please understand that we enforce...

Page 12: ...ls anywhere in between can also be damaging the louder the sound the shorter the time required to cause permanent damage Just to drive this message home here s a bit of information about hearing damage The most common type of damage caused by prolonged or exces sively loud sound is called tinnitus It manifests itself as a sustained buzzing and or ringing in the ears and can become a permanent cond...

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