Untitled - Cypher Labs
Contents
1. Volume Potentiometer Bass Boost Input Selection XLR Left Headphone Output 1 4 Headphone Output 1 8 XLR Right Output Impedance Output Selection Ground Lift Hower On On AC Input Speaker Posts RCA Input 1 1 8 Inputs 2 amp 3 RCA Input 4 RCA Line Output VOLUME CONTROL HEADPHONE AND SPEAKER SETTINGS INPUT SWITCH SELECTS ONE OF FOUR LINE IMPUTS BASS BOOST SWITCH PROVIDES APPROXIMATELY 3DB BOOST WITH A VARIABLE ROLL OFF POINT IMPEDANCE SWITCH HEADPHONE AND SPEAKER SETTINGS OUTPUT SWITCH SELECTS OUTPUT TYPE This heritage quality finely manufactured potentiometer controls the headphone speaker and and pre amp line outputs Selects one of four line inputs Input impedence is greater than 20KQ Use the Mute position when changing input cables The bass boost circuit gives a subtle increase in bass response This control eliminates the high phase shift that occurs with typical tone controls The boost amount is the same for all settings but the frequency point of the boost ranges from 47Hz to 31Hz This allows for very fine tuning of the bass response Match this setting in coordination with the Impedance Switch to match the selected headphone type of music chosen and your preferences High impedance headphones like Sennheiser 800 Standard for many Studio headphones Standard consumer headphones Speakers or very low impedance headph2. Prautes Cypher Labs Coffman Labs artful audio purely analog 66 The golden age of audio lives on in our heritage amplifiers 9 Bass Boost 41 Hz 47 Hz 36 H2 Zero 31 Hz TE TEE NEE TX 3 lt Ta ita E A di S Nr idi J E 3 d A i T 7 hifi 7 a j tt fa 1 is defined by Aristotle as the middle way between passive acceptance and unreasonable anger Often translated to English as meek it is more correctly understood to be a reference to proper understanding and accurate action Prautes as defined by the ancient greeks expresses a character in which strength and gentleness are perfectly combined The Prautes amplifier seeks to do just that present music in a manner that delivers subtlety image detail and excitement all in an accurate manner that duplicates the live experience The Prautes amplifier combines vintage tubes military technology and hand made USA components to create the Prautes experience The Prautes amplifier combines vintage tubes Cold War era military technology and hand made USA components to create the PRAUTES experience The result is a legacy piece one that is timeless and enduring VACUUM TUBE Lasas T ler The Prautes is a vacuum tube headphone amplifier that also functions as a line stage amplifier and low power speaker amplifier thus providing great flexibi
3. The line inputs should be almost noiseless at full volume Check on an unconnected input to make sure it is not coming from your source The tubes don t light up when turn the power supply on what do do e Check the fuse in the AC receptacle If the fuse blows again or the unit still doesn t work contract us for a service return dropped the amplifier and can hear a rattle inside but the amplifier still works just fine e Send it back to the factory for a check there may be a loose or broken nut When flick the tubes with my finger can hear a click e This is normal for all tubes Some tubes like the 6W6 family have a class sensitivity to vibration Because the Prautes has double sound isolation external vibrations and thumps are well isolated but touching the tubes or amp directly can be heard What options are recommended e The Coffman Labs Footers provide an extra level of sound isolation These were developed for phono amplifiers and turntables and are extremely neutral to the audio sound CYPHER LABS lc warrants our products to be free of defects in materials and The following issues do not result from a manufacturing workmanship for a period of one 1 year from the date of purchase Your warranty defect and are not covered under this warranty period will be measured from your date of purchase You must provide proof of purchase in the form of a purchase receipt invoice or other valid purchase e This WARRANTY is VOID
4. as well as electrical The Prautes is electrically rugged and meant to last The Prautes chassis is a 10076 machined not stamped metal and able to take abuse All chassis parts are interlocked in specially designed machined slots so that only four bolts per side are reguired to keep the structure intact Product Info ARE THERE ANY WARNINGS I SHOULD BE AWARE OF e DO NOT open the unit due to shock hazard Opening will void the warranty e Make sure the bottom of the unit is clear Natural convection cooling for the power supply comes from the bottom plate Be careful when handling tubes they can be VERY hot Let them cool before changing or handling If you leave the tube chimneys off be careful but it will not hurt operation e Don t set the PRAUTES near high field sources tubes can pick up external hum if close If you experience a problem just move the amp A few inches will usually do the trick WHAT ABOUT INPUTS AND OUTPUTS How many line inputs are there Are they the same e here are 4 line inputs on the back panel e There are two RCA L R inputs and two 3 5mm mini stereo inputs How many line outputs are there e There is one line output This was added for convenience and flexibility The Prautes is primarily a headphone amplifier but it makes a very decent line stage as well We recommend connecting to any input impedance greater than 100K ohms or greater Use the line output to drive amplified s
5. if the unit shows evidence of having been tampered with document We request that you contact us if you feel your product is not workin Lb a a a el cient d y y y P 9 heat moisture or vibration misapplication misuse or other operating conditions properly We can often solve product issues by phone or e mail saving you the outside of CYPHER LABS control time and expense of returning the unit If we require you to return the product contact us via email and we will issue a Return Authorization to expedite the handling of your warranty claim We will repair or replace any defective product or part when notified within the warranty period and will return the product via Failed batteries domestic ground shipping at no charge e Any action of the purchaser including but not limited to mishandling operation outside of design limits improper repair or unauthorized modification e Components which wear are not warrantied including but not limited to Prautes Cypher Labs contact points and fuses CYPHER LABS is pleased to offer es on the use of its various products However CYPHER LABS neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with Information provided by CYPHER LABS either verbal or written CYPHER LABS warrants only that the parts manufactured by it will be as specified and free of defects e Damage resulting from severe impac
6. e separate output impedances are provided to match listening equipment including 8 ohm speakers standard headphones high impedance headphones and In Ear Monitors Each of the four inputs are independent Connect your line sources such as CD player TV or iPod to any of the four inputs Since there are no digital switches which can degrade the audio signal it is recommended that unused devices connected to the Prautes be turned down or off Allow about five minutes of warm up to let the tubes settle Leave the ground lift switch on normal unless there is a ground loop hum in your setup Turn the Prautes amplifier off when not in use to increase tube life The headphone outputs and speaker outputs are independent Only the selected output is used High efficiency 8 ohm speakers work best See our website for recommendations The line output is appropriate for powered speakers power amplifiers or any other device with a line input that has an input impedance of 100K ohms or greater When used to supply a line output to another amplifier the Prautes amplifier acts like a pre amplifier A TRULY UNIOUE PRODUCT The Prautes is a tube based analog amplifier lt is powered by a small custom made internal regulated semiconductor power supply thus allowing single box construction The Prautes is hand assembled entirely in the U S A at Coffman Labs with point to point wiring it should last decades All contact points are mechanical
7. lity in limited spaces It was created as a heritage piece something that can last for decades Some of the parts like the switches are sourced from military aircraft made to withstand high stress All the external case and knobs parts are custom made only for our products The Prautes and other products are produced in collaboration between Coffman Labs and Cypher Labs bringing together two firms with advanced technology expertise The goal unlock an unsurpassed listening experience for the audio customer The Prautes amplifier bears the signature of Damon Coffman He trained in college as a concert violinist obtained his graduate degree in physics through the U S Naval Postgraduate School then built his career as an engineer in medical technology firms While pioneering new technologies for medical companies Damon began searching for audio equipment that would give his favorite pieces of music the beauty of a live performance He found some of what he was looking for in the designs of classic amplifiers from the golden age of analog audio He then combined his passion for music art and craft into heirloom quality products that embody his design philosophy of simplicity elegance and accessibility We are proud of our unigue approach to audio and design and we believe that our amplifiers will be enjoyed and cherished for many years to come N Co O1 HI 00 10 dir 12 I 14 1D Ko
8. ones In Ear Headphones Play with the different settings to select the best match for your headphones Bass rolloff changes slightly with off impedance Output to rear speaker jacks use 8 Q impedance Output to balanced XLR jacks No speaker output use for independent line output mode Output to 1 4 6mm Headphone jack Output to 1 8 3 5mm Headphone jack Leave different headphones plugged into different jacks Use the Output Switch to select which headphones are in use T t rm a 9 eit as tet Sok TUBE COMPLEMENT Depending on which options are selected at purchase either 50L6 or 25L6 tubes are supplied for the output stage 2 each of 12AU7 for the input line stage Annodized tube shields are provided to cover the tubes The use of the tube shields is optional Install the shields when the amplifier is off and the tubes are installed Gently slide the tube shields over the tubes and seat the shields into the tube stand rings When removing the tube shields turn off the amplifier and then wait until the tubes have cooled then simply grasp the shields an pull straight up Operation The Prautes uses a 12AU7 tube gain stage to drive a pair of 50L6 or 25L6 tubes in push pull mode The serial number on the back will indicate which tube type is used This provides for more power than needed for almost all headphones and can drive high efficiency speakers with about 2 watts Fiv
9. peakers omputer input or power amps What setting should I use for my headphones e Let your ears be the judge It will not damage the amplifier or your headphones if you pick a wrong setting Generally the 100 ohm or 300 ohm setting works best on headphones like Sennheiser while the 32 ohm setting will usually be best for AKG or Audeze headphones The 8 ohm setting works best on headphones like Grado IEM is for in ear monitor and earbuas How would I plug in speakers e Use the rear speaker R L connections and select SPK on front panel output switch High efficiency speakers are best as the output is in the 1 2W range e he 8 ohm setting is for speakers M NAAA gt el 5 5 7 Will damage my Prautes amplifier if use full volume on the headphones e No The PRAUTES is extremely rugged and can drive full volume signal for hours with no issues The transformers are rated for 12W Can play more than one headphone at a time e No The selector switch chooses unbalanced or balanced output 10 TROUBLESHOOTING What do I do if hear spitting or crackling sounds in my headphone e his is almost always an indication of a faulty tube Swap channels on the tube pairs to isolate the offending tube and then replace hear a hear hum on the S1 S2 S3 or S4 position what is wrong e You probably have a huge ground loop in your home electrical circuit Change the ground lift switch position
10. t crushing or mechanical harm e Normal wear and tear Except as otherwise provided herein no other warranties expressed or implied are made with respect to these products including but not limited to any implied warranty of merchantability or fitness for a particular purpose CYPHER LABS LLC assumes no liability for any damages losses or expenses resulting directly or indirectly from product use 12 Prautes
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