HeadRoom The Portable Micro Amp Скачать руководство пользователя страница 3

3

1. Line Input

  Plug your source into the Micro Amp here. in most cases your 

source will have a line-out or headphone jack, so you will need a mini-mini 
cable. If you have a digital source, then ideally you’re using the Micro DAC and 
will connect it here via mini-mini cable (see pgs. 8 & 9 for more info on hooking 
up your Micro Amp). 
 

2. Headphone Out  

The headphone out is where you plug in your headphones. 

There isn’t room for a full sized jack, but this 1/8” mini-plug will take the small 
plug of all 1/8” headphone jacks. We also sell a short flexible Grado 1/4”-1/8” 
adaptor  for your  big  cans;  and you  can  get  a  replacable  Cardas  headphone 
cable with a mini connector for many types of headphones, call us or consult 
our website for details.

3. Crossfeed Switch

 This switch engages the crossfeed circuit. The audio 

image on headphones is often not very good; typically the image is a blob on 
the left, a blob on the right, and a blob in the middle. The HeadRoom crossfeed 
provides the natural acoustic cross-feed normally heard at the left and right ear 
as heard from the left and right speaker. Adding back the normally occurring 
cross-feed signal gives your brain enough information to build the stable and 
natural audio image needed to have a quality listening experience.  See pg.7 
for more info on the HeadRoom crossfeed.

4. Gain Switch 

 The 3-position Gain Switch accomodates various headphones’ 

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 prefer.

5. Volume Control

   As you turn the volume control knob clockwise, the volume 

increases.  You never know where the volume control should be set as different 
headphones often have widely different impedances and efficiencies, so use your 
ears to choose your listening level, not the level on the dial. We recommend you 
choose a moderate level so as not to blow out your ears; a general rule of thumb 
is to adjust the volume only one or two knotches above ‘sounding too quiet’.  It 
is important to turn the amp OFF or ALL THE WAY DOWN before plugging in or 
unplugging your headphones to avoid short-circuiting the amp.

6. Power Switch  

Use this switch to turn your Micro Amp on.  The red LED will 

illuminate in the center of the HeadRoom logo in the upper left hand corner of 
the amp.  There is nothing wrong with leaving your amp ‘on’ or ‘off’ for lengthy 
periods of time; but of course if its ‘on’ it will drain your batteries when the unit 
is not plugged in.  We recommed that you unplug your amplifier if you’re storing 
it for a long period of time.

Front Panel Description

Содержание The Portable Micro Amp

Страница 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...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Отзывы: