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Contacting HeadRoom

A Word About 

Your Hearing

People have a natural tendency to listen to music at much louder levels with 
headphones than they would with speakers. To avoid permanent hearing 
damage, it’s important to be careful not to listen at extremely loud levels (or 
to listen for too long at moderately loud levels). Because HeadRoom amps 
need to be able to drive even the most inefficient dynamic headphones to sat-
isfactory listening levels, they are also able to drive headphones of average 
or higher efficiencies to extremely high levels. As a result, even though the 
volume control on your HeadRoom amp may appear to be set to a low level, 
you may not be listening at a safe level. Generally speaking, when listening 
to headphones you should only turn up the volume to the point at which the 
sound isn’t too quiet.
As a general rule, sound pressure levels under 80 decibels will not damage 
hearing, even if experienced continually. On the other hand, anything over 
100 decibels may cause permanent damage very quickly. Sustained exposure 
to sound pressure levels 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 condition. 
If you find that your ears are ringing or that there is a sensation of pressure or 
fatigue, your body is trying to tell you that your ears need a break. Give them 
a rest for a few days (or until they feel fresh). If you ignore these symptoms, 
you’re risking permanent hearing damage.
In addition, don’t fool yourself into thinking that you either have full-blown 
tinnitus or you don’t have it at all—there are different degrees of hearing dam-
age. For example, you might have a mild case where you only notice ringing 
in your ears in the quiet of your bedroom at night. However, once you have a 
slight case of tinnitus, your ears are much more susceptible to further dam-
age. So if you do experience mild symptoms, it’s important to be much more 
careful about your exposure to loud sounds.
Sorry to sound so sobering, but a lifetime of musical enjoyment requires ears 
in tiptop shape. Now that we’ve told you to be careful, don’t blame us if you 
blow it. If you have any more questions about hearing damage, call a doctor.

Содержание Micro DAC

Страница 1: ...ngle flick of a switch able to source a sweet analog signal for your favorite headphone or speaker based back end it s Super Micro DAC Okay so we got a bit carried away but so will you when your digital music so wonderfully fills that space right between your ears Either way you go you re getting the best DAC in Cirrus Logic s lineup some of the finest metal film resistors and poly caps money can ...

Страница 2: ...put selector switch 2 Power Switch The front panel of the Micro DAC is short sweet and elegant one simple set of input switches and another power switch along with the HeadRoom logo LED are all the grace that front of this simple unit ...

Страница 3: ...rn the volume down before switching betweenvariousinputsuntilyou grow accustomed to anyvolume levelchanges that may occur with varying source impedances 2 Power Switch When the power is set to 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 however we recomm...

Страница 4: ...C Rear Panel 1 Line Output 2 Optical Input 3 External Power Input 4 Coaxial Input 5 USB Input On the back of the unit you will find a line output external power input and three digital inputs optical coaxial and USB ...

Страница 5: ...t either 110v North America Japan Singapore and others or 220v Europe Australia China etc We also recommend the Astrodyne switching power supply or the larger Desktop Power Supply both accomodate any country s voltage requirement as available power upgrades these upgrades are par ticularly useful with the Micro DAC Visit our website for more information about these power supply upgrades 4 Coaxial ...

Страница 6: ... low noise low drift 1 metal film types Local device decoupling with low ESR tight tolerance PPS film capacitors Power supply decoupling with ultra low ESR electrolytics Shortest signal path possible PCB routed with high speed signal integrity and low noise in mind Multi layer PCB with dedicated low impedance power and ground layers Micro DAC Features upsampling circuitry current regulator diodes ...

Страница 7: ...aring 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 you are listening to mono and ...

Страница 8: ... www headphone com toll free 800 828 8184 outside U S 1 406 587 9466 15 VDC power input Optical cable Optical Input To a portable DVD player with Optical Output You will need an appropriate optical cable visit headphone com to purchase a cable Plug one end into your source and connect the other end into the appropriate input on the back of the amp Some DVD players may require you to turn on or act...

Страница 9: ...ll follow these same instructions Micro DAC Micro Amp Connecting Micro DAC to Amp with RCA Inputs If you are using a different amp that has a line input simply follow the instructions above If you are using a headphone amp that provides RCA inputs then you will need a mini RCA cable Plug the mini end into the output of the Micro DAC and RCA inputs into the back of the amp as always red or R denote...

Страница 10: ... You can email Sales sales headphone com or call 800 828 8184 If we can fix it while you ve still got the product everyone s happy Micro DAC Warranty The HeadRoom Micro DAC and are warrantied for two years If anytime within the first two years of your purchase you have a problem with your Micro Prod ucts you can return it for repairs under the terms of our 30 Day Guaranty HeadRoom is the only auth...

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...

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