The new Klon Overdrive pedals are being sold via eBay, one at a time. I’ll admit that I have owned more than one Klon in my lifetime and the last one I sold privately went for over £2ooo on Reverb. The C15 capacitor will remove any DC from the output signal. The two 68KΩ together with the 100KΩ resistors are usually referred as. The seemingly mythical Klon Centaur circuit was first developed by Bill Finnegan in the early 1990s. Na het staken van de productie van de Centaur bouwde Finnegan sporadisch nog een Centaur van de restant voorraden die hij had. They will just remove the DC content from the signal. var prefix = 'ma' + 'il' + 'to'; You need JavaScript enabled to view it. Created by Bostonian Bill Finnegan in 1994, the pedal and its innovative circuit … 3.1 Klon Centaur Input Impedance Calculation. Ook zijn er variaties in het circuit om bijvoorbeeld zwaardere distortion te bereiken of een breder of juist smaller tonaal bereik te hebben. The cut frequency will depend on the potentiometer value, so as the volume level is decreased, the cut frequency goes higher, starting at fc= 1/(2xπxC15xRV3)= 3.38Hz. However, there are very few that can match the tone of an original authentic Klon Centaur (from Bill Finnegan & klon-siberia.com) or a Klon "CLONE" from buildyourowntone.com. 3.1 Klon Centaur Input Impedance Calculation. De kwaliteit verschilt aanzienlijk. Nowadays the original models are highly appreciated, you just need to check eBay to see how high it goes. 4.1 Gain Calculation. Daarnaast kwam er een keuze schakelaar voor buffered bypass of true bypass op. De Klon Centaur is een door Bill Finnegan met de hand gebouwd overdrivepedaal voor elektrische gitaar dat van 1994 tot en met 2008 in productie was. “You know what it is. Boss CE-2 Chorus guitar pedal are used as pre/de-emphasis filters, Tube Screamer also creates a beautiful lopsided shape. De originele Klon Centaur van Bill Finnegan is een van de meest gewilde stomp boxes aller tijden. Builder Bill Finnegan has made Klons with both gold and silver casings as well as with an without the Centaur logo (commonly referred to as Horsie or Non-Horsie models). [Updated on 12.06.2020] A Guide to the Best Klon Centaur Clones (Klon Clones) Perhaps the most legendary (and expensive) guitar pedal of all times, the Klon Centaur was one of the first boutique stompboxes and proved that an overdrive could be much more than just distortion. The story goes like this: Klon designer Bill Finnegan made Klon number #2 first, and kept number one for himself, which he built later. This sound was later called transparent overdrive. buildyourowntone.com update: Tuesday February 15, 2011. Het circuit zat in een relatief grote unieke pedaalbehuizing die in eerste instantie goudkleurig en later zilverkleurig was. The KTR is unique in its design layout and also has some Bill Finnegan humor built in. In 1995, two of the 1uF capacitors in the signal path were increased to 4.7uF to allow more low frequencies through, and a 15K resistor was added to ‘sweeten’ the midrange. “I'm Bill Finnegan, designer of the original Klon overdrive circuit, designer of the Klon Centaur Professional Overdrive unit incorporating that original circuit, and also the hand-builder of every single Centaur unit from the beginning of Centaur production in late 1994 until … 3.2 Klon Centaur op-amp: The TL072.4. The development process was based on long listening tests, trying different resistors & caps values and listening to the sound variation, this is why the bill of materials has so many references and tricky values. The "mid hump" around 1KHz helps the guitar sound to stand out over the rest of the band, was also observed in some previous pedals (Tube Screamer humps at 723Hz and the ProCo Rat at 1KHz ). Het bestelproces van de originele Centaur hield een persoonlijk telefoongesprek met Finnegan in waarin hij wilde weten wat de speelstijl en de set-up (type gitaar, versterker andere effecten etc...) van de klant was en waarvoor hij het pedaal dacht nodig te hebben[1]. If an op-amp has a higher power supply rails, it will also have a higher slew rate and therefore it would be able to reproduce with higher fidelity faster guitar signals (transients) and higher harmonics. Klon Centaur Input Impedance Calculation. The amount of gain that this op-amp introduces is enormous, around 100dB (see graph below), it is like this because each of the three paths (Op-Amp Gain Stage, Feed-Forward Network 1 and 2) that end at the input of this op-amp receive a smaller amount of gain that sums up: The tone control is an Active High Pass Shelving Equalizer. The positive common mode limit is in contrast trouble-free. I want to talk briefly about my own experience with the Klon Centaur. Klon #2 for $500k! 17-mei-2020 - De Klon Centaur is een door Bill Finnegan ontworpen, inmiddels legendarisch gitaareffect. Het pedaal staat bekend om zijn transparante warme klank die aan een oversturende buizenversterker doet denken. var prefix = 'ma' + 'il' + 'to'; When Bill Finnegan discontinued the KLON Centaur in 2009, it opened the door for original units to skyrocket in value and for other builders to create clones or “Klones” of the Centaur. Naast analoge kopieën zijn er ook digitale simulaties van de Centaur terug te vinden op de meeste hedendaagse multi-effecten voor gitaar. The frequency response when deactivated is flat, with a roll-off on the low frequencies (fc=1.5Hz and fc=0.3Hz) and not affecting audio frequencies: The original Klon Centaur prices are shocking, but is it just hype? De Klon Centaur is een door Bill Finnegan met de hand gebouwd overdrivepedaal voor elektrische gitaar dat van 1994 tot en met 2008 in productie was. The task of this circuit is to isolate the guitar pedal electronics from the external world, providing a high input impedance (avoiding sound coloration) and DC isolation. Vanaf 2008 was Finnegan bezig met het ontwerpen van een nieuwe uitvoering van de Centaur die gebruik maakt van technieken die geschikter zijn voor massaproductie. Gvmax= (RV2+R23)/R21 = (14.7/1.8) = 8.16 (18.24dB), Gvmin= R23/(RV2+R21) = (4.7/11.8) = 0.4 (-8dB). Deze pagina is voor het laatst bewerkt op 16 feb 2020 om 12:17. Since then, these pedals have been used by the likes of Joe Bonamassa, Jeff Beck, James Hetfield, Stone Gossard, Noel Gallagher, and many more. addyb7b8a4fae477cfb1f27542226efd0f22 = addyb7b8a4fae477cfb1f27542226efd0f22 + 'electrosmash' + '.' + 'com'; Although the Klon Centaur circuit remained pretty much unchanged throughout its production run, Bill Finnegan did tweak a few component values. This email address is being protected from spambots. Bill Finnegan shares for the first time the inside of the upcoming Klon KTR pedal, which uses surface mounted components. Here are the most common misconceptions. var addyb7b8a4fae477cfb1f27542226efd0f22 = 'info' + '@'; “This was actually the 19th unit I built—I had orders for 18 and I needed the money to pay a Klon invoice or two, so I numbered those eighteen 002-019 and built this one a week or so later.” This PCB is famous for being covered with black epoxy resin (gooped) in order to prevent people from replicating it. In 2008 stopte Finnegan met het aannemen van bestellingen voor de Klon Centaur omdat de bouw van het pedaal te arbeidsintensief was en hij bij een prijskaartje van inmiddels 329 dollar nauwelijks winst maakte. Hij wordt ook als een clean boost voor het opwarmen van het signaal gebruikt. I recently had the opportunity to buy a Centaur and asked Bill his thoughts thoughts. That was four years ago (you can see the finished listing here). var addy_textb7b8a4fae477cfb1f27542226efd0f22 = 'info' + '@' + 'electrosmash' + '.' + 'com';document.getElementById('cloakb7b8a4fae477cfb1f27542226efd0f22').innerHTML += ''+addy_textb7b8a4fae477cfb1f27542226efd0f22+'<\/a>'; Thanks for reading, all feedback is appreciated. The Klon Centaur is a Bill Finnegan-designed, hand-made boost/overdrive pedal with almost mythical proportions. The second op-amp is powered between +18V and -9V, giving a total of 27V of headroom. Developed between 1990 and 1994 by Bill Finnegan, the Klon Centaur is arguably the most infamous, and frankly mythical, overdrive pedal in the music scene. De voorgaande OpAmps clippen echter ook al door oversturing. The design process took more than 4 years and the result was a mythic $329 hand build pedal that was running in production for 15 years. Op de rode behuizing van de Klon KTR staat geschreven "kindly remember that the ridiculous hype that offends so many is not of my making" (Mag ik je er vriendelijk aan herinneren dat de hype die zovelen beledigt niet van mijn makelij is) refererend aan de “astronomische bedragen” die inmiddels voor het originele pedaal werden neergeteld. In 1995, two of the 1uF capacitors in the signal path were increased to 4.7uF to allow more low frequencies through, and a 15K resistor was added to ‘sweeten’ the midrange. And I added a resistor to give the circuit a very small amount of additional low-mid response—I wanted it to have a little more roundness when used with, say, a Strat into a Super Reverb. The Input Buffer keeps the signal pristine and protects the pedal from external factors (figure 1 - left). However, since the original KLON Centaur had a “gooped” circuit board, meaning it was coated in epoxy to keep others from reverse-engineering it, it took a while for the circuit to be … According to Klon’s Bill Finnegan, “it’s a much more complex circuit than the typical overdrive/boost circuit. Finnegan is ervan overtuigt dat hij de enige in de wereld is die beschikt over een voorraad van het specifieke type germaniumdiodes dat hij voor de Centaur en latere KTR selecteerde. The Klon Centaur in an overdrive guitar pedal designed by Bill Finnegan with the help of 2 MIT Electronic Engineers between 1990 and 1994. I also had the circuit board redesigned with a ground plane for better grounding—again, no sonic effect except the potential for a little less hum. The higher the value (measured in V/µs) of slew rate, the faster the output can change and the more easily it can reproduce high-frequency signals.The TL072 has a 13-V/μs slew rate, which is above the average op-amp slew-rate (10V/us). 1. var addy_texta17f65c45c1e19e9ddd55ba5fcfbb716 = 'info' + '@' + 'electrosmash' + '.' + 'com';document.getElementById('cloaka17f65c45c1e19e9ddd55ba5fcfbb716').innerHTML += ''+addy_texta17f65c45c1e19e9ddd55ba5fcfbb716+'<\/a>'; e-mail us at This email address is being protected from spambots. Na het staken van de productie begonnen diverse bedrijven het circuit na te maken. 2.1 The importance of a big fat power supply.3. I made no other changes.” - Bill Finnegan, Premier Guitar interview -. KLON CENTAUR OVERDRIVE HISTORY It all started when Bill Finnegan was told by the sound man to turn down.To 4!!!! Vaak klinken deze “kopieën” net anders dan de originelen omdat niet alle onderdelen meer beschikbaar zijn, te duur zijn of er bewust voor andere componenten is gekozen om een variatie op de originele Klon-klank te bereiken. My sincere appreciation to D. Pereira, Charles.D, P. Babiak and A. Hofseth for their help with this analysis. De printplaat was overgoten met ondoorzichtig kunsthars zodat het niet gemakkelijk te achterhalen was. Klon Centaur Sound Signature.10. 225 dollar was in 1994 overigens duur voor een effectpedaal. Needless to say I didn't get the Centaur. Top 5 Klon Myths. View the Klon Centaur, thought to be the best overdrive guitar pedal in the industry and the artists who use it. Therefore, number 2 is actually the first ever Klon Centaur pedal in existence. De in de lijst genoemde pedalen zijn meestal geen exacte kopieën maar gebruikten wel het schema van Finnegan als uitgangspunt. The frequency at which the equalizer with either adds gain (boost) or attenuation (cut) to the signal is determined by the following equation: The gain of the pass band is defined by R24/R22 = 1 (unity gain). When Bill Finnegan started work on the Klon Centaur, the goal was to create an overdrive that improved on the full, midrange response of the Tube Screamer while adding some of the additional ‘open’ character found in a high-headroom tube amp driven to clipping. Het is een zogenaamd buffered bypass pedaal wat inhoudt dat wanneer het pedaal uit staat het signaal nog steeds door een voorversterker-circuit gaat dat het signaal een maal versterkt. “I'm Bill Finnegan, designer of the original Klon overdrive circuit, designer of the Klon Centaur Professional Overdrive unit incorporating that original circuit, and also the hand-builder of every single Centaur unit from the beginning of Centaur production in … Deze zijn niet door hem zelf gebouwd, maar gebruiken wel door hem goedgekeurde componenten waardoor de klankeigenschappen daadwerkelijk identiek zijn aan die van de Centaur. Er is dus sprake van getrapt clippen. Myth No.1: The Centaur is a slightly tweaked [insert name of extant pedal here] circuit. Uitgangspunt daarbij was dat deze nieuwe uitvoering vrijwel identiek zou klinken maar het pedaal een stuk kleiner zou zijn. document.getElementById('cloakb7b8a4fae477cfb1f27542226efd0f22').innerHTML = ''; This factor is pretty important for the Klon Centaur distortion sound signature. De op dat moment populair geworden Ibanez Tube Screamer en andere overdrive pedalen gaven hem ook niet het transparante doch overstuurde geluid wat hij zocht. Het pedaal heeft naast de voetschakelaar de drie draaiknoppen - op de Centaur gain, treble en output genoemd - die op de meeste overdrivepedalen terug te vinden zijn. Note: The Slew Rate of an op-amp describes how fast the output voltage can change in response to an immediate change in voltage at the input. And while it’s worth noting that his pedal is identified as #2, it’s actually the first ever to be built and sold, as Finnegan set aside #1 for himself and constructed it at a later date. It also creates a high pass filter together with RV3. When the effect is on, part of the clean signal will bleed through the R243 to the output. Equalizer Circuits by Electronic Engineering Dictionary. Klon Centaur Tone Control.7. Deze pedalen zijn tegenwoordig zo geliefd dat ze op veilingen enkele duizenden euro’s opleveren. The tone control in the Klon Centaur is generally accepted as a good control which is able to adjust the sound of almost any guitar into any amp. Klon clone kits and Klon clone circuit boards are in stock and shipping again. var addya17f65c45c1e19e9ddd55ba5fcfbb716 = 'info' + '@'; What is a Klon Centaur pedal? The contribution is around 1dB and very likely to be not audible. Power Supply. The Klon Centaur in an overdrive guitar pedal designed by Bill Finnegan with the help of 2 MIT Electronic Engineers between 1990 and 1994. In 2007 werd het circuit toch achterhaald en op menig internet forum gedeeld. The initial idea was to improve the TubeScreamer transient response and the midrange-bass frequencies in order to create a big open sound with a hint of tube clipping: the so-called transparent overdrive. In the same way, when the pedal is off, part of the dirty-effected signal will bleed to the clean output. In 1995 I made three small changes: I added a resistor to give the circuit some protection against a static charge delivered to its input—a change that has no sonic effect. Er zijn zo’n 8000 stuks van gebouwd. Het circuit leent zich ervoor om ook onvervormd een clean signaal te boosten en de klank te “focussen”. A lot of players wanted multi-FX pedals and digital rack units; not boost or overdrive pedals. The 1N34A germanium diodes have a forward voltage VF=0.35 which is quite low compared to silicon diodes that usually have 0.7V drop, resulting in a harder compression of the signal. The Input Buffer. This maximum gain is in line with what other similar pedals have: Boss DS-1 (35dB) or Tube Screamer (41dB). Deze gaf hij aan een vriendin die het niet breed had zodat ze die op EBay kon veilen. When all the signals are joined before the Summing Amp (figure 1 - center) the signal is bent creating an interesting shape. It passes all freqs up to 400Hz and the frequencies above that point get boosted or cut: Frequencies above 408Hz will have boost or cut. The Klon Centaur schematic could be broken down into 5 parts: Input Stage, Op-Amp Gain Stage, Summing Stage, Tone control, Output Stage and Power Supply: The circuit is quite original, showing a mix of academic electronic design together with pure experimental/think-out-of-the-box blocks. The Klon Centaur is an engineering exercise of how to make a great sounding guitar pedal without using any exotic part or obsolete integrated circuit. In 2012 bracht Finnegan de nieuwe lijn genaamd Klon KTR op de markt. The Klon is an overdrive that was personally made by Bill with the best available parts at the kitchen table. The Output Stage.8. The importance of a big fat power supply. De markt van hi-end boutique-pedalen bestond nog nauwelijks. 4.3 FeedForward Networks.In parallel with the Op-Amp Gain Stage, there are 2 FeedForward networks, they have different tasks: This op-amp will add the output signal of the Op-Amp Gain Stage and the two Feed-Forward Networks mentioned above. Klon Centaur Models: Gold vs Silver - During its 15 years of production, the Klon enclosure and circuit had some variations in color and graphics, but in theory, the minimal variations between the years do not affect the sound: “The fact is, under the hood they’re all basically the same. In the parts of the circuit where double side PCB are needed (tracks crossing), there are links (wired bridges) that make the manufacture easier and cheaper. As a rule of thumb, the value of this resistor is at least 10 times the value of the resistors that make the virtual ground ( R27 and R30 are 27KΩ). The C1 input capacitor stops any DC coming from the guitar and together with R2 will form a high pass filter (fc=1/2*π*RC = 1/2x3.14x1MΩx0.1uF = 1.5Hz) 1.5HZ is completely out of the audio spectrum and will not affect the original signal or add any tone/coloring to the signal. Note: The shelving filters have many uses in audio, in the Boss CE-2 Chorus guitar pedal are used as pre/de-emphasis filters in order to reduce the noise during the signal processing.