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Message: <blockquote data-quote="zCexVe" data-source="post: 1751186" data-attributes="member: 3878">13. Keyboard and Mice   There are lots of them available. Get USB ones.For a mouse get optical or laser if you game.800DPI is enough for usual tasks, get a DPI changeable mouse for gaming. Say like 800-2500DPI mouse.For keyboards get a one with Multimedia buttons. If getting wireless ones try them well before buy it and Have a warranty.Remember try these before you buy. No matter how good your PC is, these are the two which you use to interact with them. So they need to be well compatible with you.Logitech and A4Tech are good at these. If you have money Razor is the choice. Logitech G series is available in SL.   ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------14. Speakers & Surround sound   These must be bought after hearing. Because the taste is different from one to another. Creative is same all range, Bose have tweaked mid range, Altec Lansing have a sweet treble and some deep bass (I don’t know the word for that feel) list goes on..  14.1 Basics      Even though this stuff is really nerdy ,I added the basics. It will make some explanation in your mind with numbers on how to go for a good sound setup.Frequency Response   – The range of frequency the hardware can produce. This should exceed the human hearing range for optimal performance.<20Hz and >20kHz.SNR(Signal to Noise Ratio)   – SNR=Output audio signal /noise within that signal   The higher the SNR the better the audio quality.RMS (Root Mean Square)/ Rated power –   Basically the measurement at which the speaker operates at. RMS is the median power rating across the speakers operating range. speakers with a higher RMS are more powerful and louder, but require more power to operate too.Peak power - The maximum amount of short-term input of a speaker that can tolerate before damaging itself.But it is possible to damage speakers long before reaching the peak power rating.So it is recommended not to operate a system @ 100% load for a long time.Speaker Impedence -The average impedance of a speaker while operating in normal way.    This is important when matching equipment. For example you can plug a 4 Ohm speaker to a 8 Ohm amplifier but never below a 4 Ohm one.Crossover Frequency - Audio frequency boundary in a multi driver setup.Where the output range is splitted and send to multiple drivers in the sound setup.Usually it is better to have drivers overlapping each others range for a better hearing.Crossover Filter - Type of crossover filter used in a multi-driver setup. Often high-pass or low-pass. A high-pass filter will only allow frequencies above the crossover frequency .A low-pass filter will only allow frequencies below the crossover frequency.14.2 Driver type (speaker type)       There are two main types of drivers. Individual multi driver or specialized drivers for each range. It is better to have those specialized drivers.**4 main sub types of drivers (speakers) – Detailed(please note that I can’t simplify these more than this. I need picture illustrations for these too but lack a suitable host and pictures, will be added if requested, this is like telling a blind what colors look like. Please google the names and look at the pictures that come up for them.)Tweeters -         Better suited to play back frequencies of 2 kHz to 30 kHz.For the treble parts. There are 2 main shapes. <ul> <li data-xf-list-type="ul">Cone shaped – mellow and softer      tones, narrow range.</li> <li data-xf-list-type="ul">Dome shaped –Crisp and brilliant      tone, wider range.</li> </ul>There are things called super tweeters. AFAIK they can have ultra high KHz range. Never seen a one in operation though.Subwoofers and woofers   - Woofers can play from 40Hz to 1kHz.More specific design is subwoofers which are designed to play back frequencies from about 200Hz ~15 Hz or even lower. Boom Boom Bass Baby!!! <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /> <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /> These come in various sizes said in inches 6”, 8”,…. 18”,20” .The larger the woofer is the looser the sound becomes from tighter. So better to have something in the middle which offers kind of both cutting off very low and very high. Also there are single coil and double coil,(single magnet, double magnet) etc. More of them, more powerful and flexible is the woofer.Mid range –   Plays the mid range (the voice) between the tweeter and the woofer.Multi driver (Full range driver) -   Has everything in it. Disadvantage is can’t play more dynamic, fast paced music. Very much directed music. Fairly expensive. But needs little space. They are also called 3-way , 5-way etc.14.3 Audio standards & connectors         There are two main types.Digital and analog.Both have their own pros and cons.Digital signals must be encoded and decoded and transmitter and receiver must know about the format they are on. If not you are on 2 channel in digital line.Biggest advantage for digital is no signal quality loss or noise added through the way.Crystal clear <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" />Tip, Ring and Sleeve connector (TRS)    – The most common in PC audio and the world.There are 3 main types.Stereo (6.3mm),mini(3.5mm) and micro (2mm).It is like a rocket in shape ,can carry upto 4 signals with ground.Deutsches Institut für Normung (DIN)   – A circular Jack that can carry 3~8 separate signals.Used mainly in Recording studios.Old and rare.Radio Corporation of America jack (RCA)   – Male has a pole in a middle of a round, female fits it. Another more common jack. It is a one way one signal cable, so the signal is stronger than the TRS connector. Can be S/PDIF ready too. Toshiba Link (TOSLINK)   – Better than S/PDIF can transfer more than 32bit data at a higher bandwidth. Uses fiber-optic to transmit data. A really high price tag.Very small square connector.Sony/Philips Digital Interconnect Format (S/PDIF) -    A famous digital audio throughput standard. S/PDIF cables are those that meet industry requirements to transfer a digital signal with little to no signal loss. S/PDIF cables come in either a coaxial vareity, with is capable of transmitting in 20bit and 24bit signals, and optical cables, which can transmit upwards of 32bit and at a higher bandwidth.The greatest we have to transfer audio nowadays. <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" />Connectors involve Banana jack, Spade jack, Barrel jack etc.14.4 Tips and What to buy         More things to see...   ·wired or remote sound control   ·headphone jack   ·Bass control   ·wall mounts and/or desk stands   ·Wire length.      Here are your choices (Credits to Chanster)2.1 setups-Low end=SBS 370(The best you can get...good bass for the price) Micro Lab ,Also Creative A200 and SBS 380.Mid Range=Altec Lansing ATP3,Some of the Creative inspire T seriesHigh end=Logitech Z2300,Roth Audio Audioblob2,Klipsch ProMedia 2.1 160watt5.1 Setups-Low end=Creative Inspire M5300/SBS 580Mid Range=Creative Inspire T6100,Logitech G51,X540High end=Logitech Z5500,Edifier S750,Klipsch Promedia 5.1 Ultra        ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------15. Links     <a href="http://www.extreme.outervision.com/psucalculatorlite.jsp" target="_blank">A place to calculate the power you need for the PC.</a>   <a href="http://www23.tomshardware.com/graphics_2007.html" target="_blank">Compare VGA performance</a><a href="http://www23.tomshardware.com/cpu_2007.html" target="_blank">Compare CPU performance</a><a href="http://www23.tomshardware.com/storage.html" target="_blank">Compare HDD performance</a>15.2 Online shops and Sri Lankan PC sellers’ web sites<a href="http://www.slmega.com/" target="_blank">http://www.slmega.com/</a><a href="http://www.nunet.lk/" target="_blank">www.nunet.lk</a> – Nunet Technologies Pvt.Ltd(Foxconn/patriot)<a href="http://www.barclays.lk/" target="_blank">www.barclays.lk</a> – Barclays computers pvt. Ltd and Megabox(Foxconn)<a href="http://www.pchouse.lk/" target="_blank">www.pchouse.lk</a> – PC House pvt.Ltd(Gigabyte)<a href="http://www.epsi.lk/" target="_blank">www.epsi.lk</a> – EPSI computers pvt. Ltd(ASUS/Creative/Apple/Viewsonic)<a href="http://www.computer.lk/" target="_blank">www.computer.lk</a> – An online PC seller<a href="http://www.salaent.com/" target="_blank">www.salaent.com</a> – SALA enterprises (Prolink/Delux)<a href="http://www.laptop.lk/" target="_blank">www.laptop.lk</a> – Technocity Pvt.Ltd – HP/Acer laptops<a href="http://www.metropolitan.lk/" target="_blank">www.metropolitan.lk</a> – Metropolitan(Acer/canon)<a href="http://www.memory.lk/" target="_blank">www.memory.lk</a> – Memory Technologies (Kingston)<a href="http://www.gobigit.com/" target="_blank">www.gobigit.com</a> – MyLinx Pvt. Ltd (Corsair)15.3 Reading on for more<a href="http://www.tomshardware.com/" target="_blank">www.tomshardware.com</a><a href="http://www.techpowerup.com/" target="_blank">www.techpowerup.com</a><a href="http://www.xbitlabs.com/" target="_blank">www.xbitlabs.com</a><a href="http://www.anandtech.com/" target="_blank">www.anandtech.com</a><a href="http://www.vrzone.com/" target="_blank">www.vrzone.com</a><a href="http://www.xtremesystems.com/" target="_blank">www.xtremesystems.com</a>                                                                   ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------16. Current configurations you can go with** System units only **            ------------------------------------------------------------------------------------------  Intel Pentium Dual core E2200(2.2GHz,1M)Gigabyte G31M-S2L mobo1GB Kingston KVR DDR2 667 RAM80GB Hitachi GST/samsung SATAII 7200 RPM 8MSamsung 22X SH-223 DVD RW SATA  Casing with PSU 26000 LKR   ------------------------------------------------------------------------------------------  Intel Pentium Dual core E2200 (2.2GHz,1MB)Gigabyte G31M-S2L mobo2GB Kingston KVR DDR2 667 RAM250GB Hitachi GST/Samsung SATAII 7200 RPM 8MSamsung 22X SH-223 DVD RW SATA  Casing with PSU30000 LKR  +Gigabyte/mercury/Foxconn 8500GT 512MB GDDR2= 38000LKR  +Gigabyte 8600GT 512MB GDDR3= 42000LKR  ------------------------------------------------------------------------------------------  Intel Core2Duo E7200 (2.53GHz,3MB)Gigabyte GA P35-DS3P /Foxconn MARS2 GB Patriot DDR2 800 RAMGIGABYTE Radeon HD 3850 512MB GDDR3250GB Samsung HD252LJ SATA II 8M/16M 7200RPMSamsung 22X SH-223 DVD RW SATA  GIGABYTE casing and GIGABYTE/Foxconn PSU77000LKR  ------------------------------------------------------------------------------------------  Intel Core2Duo E8400 (3 GHz,6M)Gigabyte X48 DS4/DQ64 GB Patriot DDR2 800 RAMGIGABYTE Radeon HD 3870 512MB GDDR3500GB Samsung HD252LJ SATA II 8M/16M 7200RPMSamsung 22X SH-223 DVD RW SATA  ASUS ATX 2.3 Power supply with EPS 2.92120000 LKR                  ------------------------------------------------------------------------------------------   ------------------------------------------------------------------------------------------17. Thanks      Guys @ <a href="http://www.elakiri.com/forum/../" target="_blank">www.elakiri.com</a> (Dexter.morgan.666, geethq, Chanster, nuwa1, Anusha, sameera_m, shanX, sri_lion to name a few) Guys @ <a href="http://www.techpowerup.com/" target="_blank">www.techpowerup.com</a><a href="http://www.xtremesystems.com/" target="_blank">www.xtremesystems.com</a><a href="http://www.tomshardware.com/" target="_blank">www.tomshardware.com</a>   ------------------------------------------------------------------------------------------   ------------------------------------------------------------------------------------------Version 1.4Last edited by zCexVe 28-09-2008   ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------</blockquote>

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