HeadRoom The Portable Micro Amp Owner'S Manual Download Page 8

8

Connecting Your Portable Micro Amp

Hook the Micro Amp to your iPod, portable CD play-
er, or any other source with a headphone jack using 
a mini-mini cable. If your source happens to have a 
line-output,  then  even  better;  use  the  line  output 
rather than the headphone jack (using line-out will 
completely  bypass  the  player’s  volume  control  alt-
0gether).  
Simply run the mini-mini cable from the line-out or headphone jack of your player into 
the line input on the front of the amp.

Connecting the Micro Amp to Analog source:

If your CD player has a set of RCA outputs, an RCA to Mini Cable will allow you to con-
nect the RCA outputs of your player into the line input on the Micro Amp.  Be sure to 
note that as always, red or ‘R’, designates right channel on RCA inputs.

HeadRoom Micro Headphone Amp

volume

line input

headphone 

output

power

off

crossfeed

battery

external

gain

on

medium

high

low

Source 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

Portable cable

Portable Cable

RCA 

Inputs

You can use your Micro Amp as a miniature pre-amp for self powered speakers.  Most 
self-powered speakers have RCA inputs, in which case you will use a mini-RCA cable 
to attach to the Micro Amp.  Attach the mini end of your cable to the pre-amp output of 
the Micro Amp.  Plug the other RCA cables into the back of your speakers.  If your self-
powered speakers have a mini input, use a mini-mini cable to connect your Micro Amp.

Using Self Powered Speakers with the Micro Amp

pre-amp output

headphone 

input

Connecting Your Headphones:

line input

source

Micro Amp

HeadRoom www.headph

one.com toll free 800-828-8184 outside U.S. 1-406-587-9466

+/- 15 VDC power input

+

-

+

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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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