Baxandall tone stack

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May 29, 2023 · Stack Exchange network consists of 183 Q&A communities including Stack Overflow, In this simple active Baxandall tone control, what's Rin function? Specifically I've been studying the James Baxandall Tone Stack (for treble and bass control). Please watch the 60 Cycle Hum YouTube review to hear how it sounds!SALE! Price includes free shipping. (252) 100% positive. 8" deep. Mar 30, 2016 · I had a four channel Carlsbro valve head where I changed one channel to a fender tone stack and left the James stack in the other three. 23, p. Brand New. The mid control does not literally add mids. Thurmond, "New Devices for Equalization," 52nd Convention of the AES, (Abstracts), vol. The Marshall JCM800 Bass amp models 1987 (50W) and 1992 (100W) from the early-mid 80s had a Baxandall Treble and Bass controls and a passive mid control with Sweep control to change the frequency. It is then fed to a pre-amplifier prior to going into a 14-Watt audio amplifier. Nodal analysis Vin is performed to yield a system of linear equations, which are then placed in matrix form and solved using Cramer's rule. It ended up making one of the pots on the tone stack control volume of circuit. Originally I did a layout for a schematic called "Bax in a box" (google it and you'll find it) that worked ok, but it was just "semi-active". Apr 5, 2019 · Yeah, the original Baxandall was an active tone stack, and the passive version as you would use in an amp is the James. Starts to overdri James-Baxandall Tone Stack Dept. This simple tone control circuit is designed based on the famous Baxendall tone control circuitry. The mids seem to be cut only, so flat is full on. It was used in many hi-fi amps spanning from the 50's through to today. A Baxandall can boost the mids by turning down both the lows and highs, and the center will shift lower and higher as you adjust the relative levels of Based on our analysis of the James tone stack, let's design our own stack. 00. US $30. So I understand that the Baxandall circuit is a tone control circuit, able to configure a bass and treble through RC filters. Baxandall Bass and Tone Circuit and Calculator. This is for a bass preamp from Fuzzdog - it's their take on the EWS Tri Logic Mk2. (No link available) Duncan's Amp Pages - Tone Stack Calculator; G. The first one is a 14-Watt Guitar Amplifier with Baxandall Tone stack and the other is a Mini Guitar Amplier kit. The values shown on the schematic work well in my opinion, but if you want to tweak it there is a great tool on the internet called Duncan's Tone Control Simulator May 6, 2018 · Hi , used the Duncan tone stack simulator tool to fine tune the 6gk6 (6bq5) stereo build and it works a treat when making adjustments because of transformer / component / tube nuances . Oram trained with and was influenced by Dick Denny at Vox amplifiers. This is a Baxandall circuit calculator for an active filter design connecting to an operational amplifier circuit shown above. Visit Stack Exchange Nov 13, 2006 · The Baxandall control. The mids zoom right through ( minus the insertion loss ). Shift: selects frequency controlled by Mid pot. Boost leaves the notch and cut leaves a peak at the midrange. Inside the first box is the equivalent of the mosfet booster wich i used to simulate it´s effect on the tone stack. The older Oranges (OR120's, OD120's OR80's, OD80's, GRO's, ORS's, OTR's) use what's called a Baxandall tone stack for their tone controls. In the graph above, we can see where those points are, and the calculator in this part of the article calculates the FLB baxandal tone stack pack. Dec 30, 2006 · Knowing the James Tone Stack has some "loss" to it (volume wise) and that it has quite a bit of tone shaping capability to it (given it's a 2 knob tone stack), I decided to try it out. The James Tonestack (or passive Baxandall) is a two-band tone network popular in Hi-Fi, as well as classic Ampeg and Orange amplifiers. Diode: selects between clipping diodes, to alter dynamics and headroom. This didn't work though. Apr 2, 2012 · Re: How to implement Baxandall tone stack. from $199. I thought I would try to start a thread on these using editable tone stacks out of our SCH Library. Greater midrange attenuation facilitates possible bass and treble boost, but requires greater overall voltage gain in the signal chain. Medium gain op amp based overdrive pedal with soft LED + germanium diode clipping and active Baxandall tone stack. Baxandall stack. The Kit includes Volume, Treble, Bass and Echo controls to customize your echo sound. The Baxandall design is distinguished by having very low harmonic distortion due to the use of negative feedback in the circuits, which among other things helps keep more precise control over the behavior of the op amp s. Baxandall in 1950. Less insertion loss than a TMB stack, and you basically only control the bass and treble. From my experience the bass and treble are boost only, so flat is basically zero (although putting both to zero gets you basically no output). Below is the schematic for the baxandall EQ as taken from an Ampeg SVT. Joined Nov 23, 2020 Posts 3,626 Age 64 Location Finland. Peter Baxandall's Tone control has been mentioned in another thread, so rather than go too far OT there, I've uploaded a zip of my simulations of two versions of it as "Baxandall in LTspice. In this video, we will analyze an active baxandall tone John Oram has been described as ‘the father of British EQ’ – a contentious title that has caused upset in the UK. Center: no diodes, minimal compression. Search in titles only Search in Build Your Amp only. The result of this is the need for a high to low impedance buffer amp circuit on the input and output side. The controls:Gain: the amount of overdrive from clean to dirty. Lots of tone adjustment range compared to FMV stack. #12. While the Hi-Fi world has heated and rather vacant disputes about fitting any Dec 15, 2011 · The vanilla Baxandall circuit is not conducive to direct addition of a mid control. Nodal analysis is performed to yield a system of linear equations, which are then placed in matrix form and solved using Cramer's rule. I would consider other schemes. Mar 31, 2016 · Aug 7, 2008. It will drive a 4 or 8 Ohm speaker, 10watts or better. Oct 22, 2021 · However, with the BB Preamp, since it has a Baxandall shelving tone stack afterward that shapes the lows and highs, and since the whole circuit is voiced differently than the Tube Screamer, the net effect of the TS-style tone control is that it does have more apparent impact on the mids. The Bench Control. J. There is a baxandall tone stack stage that i found on the internet. Negative Feedback Tone Control - P. I suppose it might sound OK if the amp was designed around it as mentioned above. In this video I play around with what adding a Baxandall Tone Stack sounds like. A "Baxandall" tone stack, often associated with older Ampeg amps, usually has only two bands; but they interact differently than the Fender stack and also differently than other two-band EQ's. Mar 28, 2001 · This is the formal name for the grandfather of the type of EQ controls found in most analog equipment in use today. View similar gear from other sellers on Reverb. Also Carvin is using a modified version of Baxandall with a MID control. Addeddate 2010-09-09 18:40:17 External_metadata_update Nov 24, 2015 · The Baxandall circuit. Guitar Echo/Reverb/Delay Effects Kit with a 14-Watt amplifier and a Baxandall Tone Stack. The dual op-amp was just acting as a buffer and a make-up gainstage, so Baxandall Tone Stack. An FET stage either mosfet of JFET could be used for this. The tone controls used by Ampeg are lossy and require a make up gain stage. With Fender-type stacks the bass and treble knobs mostly just boost, and the mids knob mostly just cuts. May 29, 2024 · It will accept your guitar input via a 1/4" phono jack. I have read the word before, but, what is the special magic? I can say that the pedal does have a super tone variation Mar 7, 2005 · Ampeg - NOT BAXANDALL!! I know this is almost trivia BUT Ampeg's tone controls are not Baxandall and never were. Looking at the passive Baxandall tone stack, it has just two controls in it's classic form, bass and treble. (260) 100% positive. php One of the secrets behind some of Orange, Magnatone Very elegant, very simple. The EXPANDER control changes the amount of internal gain in the pedal. 1975) preprint 1076 Apr 11, 2005 · Yes the Baxandall is usually flat with the bass and treble half way. #8. Free Shipping. URLs also include all part values for ease of recall and sharing. So, I just used what I could find. If i set Ri (the booster's output impedance) to zero the response curve is exactly what i wanted, but with Ri=2. Jan 21, 2013 · 1. Yes, yes, well you see. That buffer can also provide makeup gain if you want it. In this active Baxandall bass and tone control circuit we need a 20 dB gain with the low frequency upper 3 dB corner at 30 Hz, and high frequency upper 3 dB corner at 10 kHz. Audio Super Crunch Box. Simply click on the appropriate tab to bring up a different schematic. For guitar work, it is more appropriate to halve the treble point due to the lower frequencies involved. Transistor Q1 (BC109) and its associated components Doesn't have a baxandall tone stack but the Earthquaker Dunes is a tubescreamer with multiple clipping options, a bright switch, and a bandwidth switch. ) A Aug 28, 2008 · Tweet. The LEVEL control has plenty of output on tap to be able to drive your amplifier further into saturation. Add to Cart. However,by using the PEC6470000 integrated tone stack module that combined 4 capacitors and 2 resistors into one 7 pin package Ampeg was able to reduce the parts count and make the construction of Aug 26, 2006 · The following is a usenet posting made by Mark Garvin in 1995 - it covers the operation of the Baxandall tone stack in some detail. Description. http://kendrick-amplifiers. Duncan's Tone Stack Calculator. 827 (Dec. The term “ tonestack ” is unique to guitar amps. Mar 31, 2016 #5. 99. Experimentation with the Tone Stack Calculator freeware (available from the Duncanamps website) will quickly convince you that although the James [3] control is the least worst of the passive RC bunch, it requires logarithmic controls to even approximate to a flat electrical response Mar 7, 2005 · The Baxandall (or really, I think what most people mean is the James) stack, can boost and cut the treble with respect to the flat response. Sep 9, 2020 · The Baxandall equalizer is a shelving EQ, but unlike traditional shelving EQs, which have a steep rise or fall above the set frequency, the Baxandall shelving curve has an extremely wide Q curve, which creates a gentle slope. Try just about any Ampeg amp to experience a James tone circuit. Version 3. R. Fender controls vs hifi controls. I have a Yamaha PB-1 that uses a Fender tone stack. In fact, it’s often called a tone control, and if you’re old enough to remember the “bass” and “treble” tone knobs on older hi-fi stereo systems, there’s a good chance they were Jul 8, 2021 · In a 'shock' move Gibson implemented a similar tone stack to the Bassman. Also, it's not a tubescreamer but Matthew's Effects Architect V2 and V3 have 3 band baxandall EQ's Compact Baxandall Tone Stack. Jan 17, 2023 #3 2. The guitar sound is then routed thru a Baxandall Tone Stack with Bass and Treble controls. Circuit Analysis of Baxandall Tone Control. To nd the frequency response of the circuit, the ratio Vout Vin needs to be determined. Dec 6, 2023 · A Baxandall EQ is a special type of shelving equalizer based on a circuit developed by English electrical and audio engineer Peter J. Search titles only; Posted by Member: Separate names with a comma. Condition: New. Watch. A two band BASS/TREBLE active Baxandall tone stack provides +/-20dB, a crucial part to fine tuning the sound in a live or recording scenario. Advanced Search Feb 1, 2020 · Baxandall Tone Control. Those are pretty rare. zip". com/webinars/signup. You don't get any particularly sophisticated midrange shaping - it's quite a broad-brush approach to EQ, but can sound good. Seller's other items. US $40. This circuit is my modification of the standard Baxandall tone control circuit. See the Duncan tonestack calculator. The 6gk6 build incorporated a baxandall tone stack and worked well I used 12au7 instead of 6eu7 / 12ax7. -----I've received a couple more email queries about tone controls, so I figured it would be best to answer them here. We get alot of questions about tone stacks on the forum. I. It's been said that the James is incapable of a bad tone. 12-11-2011, 03:53 AM. The stage feeding the tone control doesn't have to be a cathode follower but should have a low output impedance (say 1000 ohm or so). I've started playing around with the Duncan Tone Stack Calculator and understand the Log-A and Log-B difference as it pertains to the software. You could simulate a Baxandall with a Parametric, leaving the mids at zero, and dialing the Q of the high and low to what the Baxandall's frequencies are. This piece of gear has sold. The same is true for the James style -- lacking a mid control, its mids are "cut" by "boosting" (throwing away less) bass & treble, leaving the mids lower by comparison. The circuit given here can give a maximum cut or boost of around 12 dB at 10 KHz (treble) and 50Hz (bass). And there are 7 new simulation models for Baxandall & James tone stack variations. Remember you can save an entire tonestack design in "custom components" using the ExpressSCH program. The 14-Watt has a Baxandall Tone Stack with Bass and Treble controls. This had the pleasant side effect of also sucking out midrange at full bass settings, something which was later used by Vox in their Vox AC30 Top Boost models. workflow. It utilised a passive treble and bass tone stack driven by a low impedance output cathode follower stage. The Electronic Audio Experiments Dagger is a simplified and miniaturized iteration of our Longsword op amp drive. Sign up for this webinar here. Also, both bass and treble can be independently adjusted. May 24, 2019 · A spokesperson told us, "Spring reverbs were usually paired with tone stacks from guitar amplifiers. The EQD Talons & JHS Charlie Brown have a Baxandall stack with an additional MID control crammed in. With James turnover frequency is fixed, with Baxandall it vary depending on potentiometer position. The midpoint in this stack is typically set around 1KHz because this seems to suit audio listening best. 6k the treble control is lost. 03-16-2018, 11:14 AM. first make sure the environment variable is set for ngspice to output ASCII not bin. Analysis of James & Baxandall Tone Control Circuits. This Tone Stack Calculator is a great resource! I have been thinking about how to simulate a particular Baxandall tone stack that contains active components. This works great for distortion pedals, as you can roll off highs and/or lows and leave the midrange alone. Mar 15, 2013 · Ampeg was using the Baxandall tone circuit, which again was more expensive as it used used more components than the tone circuit fender championed. NightFire Electronics LLC. The basics of it would be using Two (or Three) Pass Filters (High, Low, Band-Pass for mid range), followed by an amp or control stage, then summed back together at the output. Variation: Active, dual bass capacitor, dual treble capacitor. What I'm having an issue with is finding out what the audio taper is for the pots being made today. If a tone control is to be included to compensate for poor recordings, then it must be implemented carefully. Up: MOSFET clipping, medium compression. Pros: The Baxandall tone stack is KILLER and totally Low/High: James/Baxandall tone stack (shelving filters) Mid: active midrange boost/cut. This is great for learning new songs or just playing along with your favorite music. It works beautifully with any amp and its open treble and powerful low-end allows you to tailor the boost to your exact requirement The Baxandall tone stack. . + $10 Shipping. Part 1 of a planned 5 part series on tone stacks for amplifiers. As of February 2024, the Dagger is in indefinite retirement. Certainly most amplifiers are fitted with some sort of tone control, beit a single knob top-cut or the more normal bass and treble controls. Newer Than: Search this thread only; Search this forum only. The general understanding I have from it, is that the capacitance of the capacitor can vary resistance depending on the frequency from the equation f = 1/ (2piXC). Feb 18, 2015 · I recently purchased a pedal that has a tone stack called Baxandall. The schematics should be on the Hoffman site. Some of my thinking was that there was TOO much gain between the gain stages in the OD section. Video TS1: Tone Stack ConceptsVideo TS2: Big MuffVideo TS3: Sizing the bright cap for a Big M Oct 3, 2020 · Curves in James tone stack and Baxandall are different. It's a deceptively simple design, equally versatile and forgiving. A classic Baxandall tone stack usually features just the bass and treble bands, but we have also added a Mid band with control over the Q Sample clip of an Electra Distortion circuit with a Baxandall tone stack and a simple boost on the output. It consists of just a bass knob and a treble knob. Simpsonville, SC, United States. Commonly found in hi-fi designs usually centred around a midrange frequency of 1KHz, while most guitar amp tone circuits are centred around a midrange frequency from 300hz to 500hz. Active Baxandall tonestack. com/65535/49215405393_76048d8c I figured i'd post an explanation of the tone controls, to clear up some misconceptions, and answer some common questions. Below is a tone control circuit commonly known as a Baxandall type. Baxandall finished his preamplifier with a 6BX6 wired as a cathode follower. Jun 11, 2014 · In this second of a two-part video series featuring the design and function of tube amplifier (passive) tone stacks, the following topics are covered: 1. Watch this gear and we'll notify you if it becomes available again. This works best when the op-amp package has FET inputs, as there is no current-compensating resistor between the non-inverting input and ground. 3. Re: Baxandall tone stack----- The Ampeg Gemini 12 G12 uses it and it sounds pretty darn good. staticflickr. $100. My second full build of the Moonlight again featured a Baxandall tone stack, but one built onto a single concentric dual pot, to keep the spaced used to a minimum. In the case of a Ampeg SVT, the EQ is driven by a 12au7 triode gain stage. I have a question about the method used to simulate the wah pedal, which also has active components. April 02, 2012, 07:14:11 PM. By using this cutoff frequency you can determine It will accept your guitar input via a 1/4" phono jack. The very famous Big Muff circuit. Jul 20, 2023 · 14-Watt Guitar Amplifier with Baxandall Tone Stack Kit (#5887) NightFire Electronics LLC. Big Muff EQ Fender Marshall. $159. In addition, boosting both Bass and Treble will produce a sort of "mid cut" effect which is DIFFERENT from just cutting the Mids (much narrower). Repost of article follows:-----TONE CIRCUITS, PART 3. Down: Silicon diode clipping, maximum compression Dagger. Nov 27, 2017 · To add tone stacks with active components, the procedure described here does not work. Musician Dick wasn’t particularly interested in the mathematical approach of Peter Baxandall and preferred to mix-and-match components until he achieved a Jul 22, 2010 · Baxandall, you can boost or cut two preset frequencies, whereas the Parametric, you set the (in this case, 3) frequencies within a range you want to boost or cut. The EQ has 2 controls Bass and Treble (hi and low). Units are still available through dealers while supplies last. Yes, after the coupling cap is a fine place to put it. This is my idea for tone control, as both my guitar and amplifer both lack tone control my idea was to use a Passive Bandaxall Tone Stack between my guitar and the amplifer input to Aug 13, 2012 · Summary: Two-and-a-half years in the making and combining what Robert Keeley feels are the best in overdrive pedals, tube amps, and tone stacks. @ John Lyons The tone section is like it is, because I copied it (with minor changes based on parts I have on hand) from a Boss FA-1. A Baxandall can boost the mids by turning down both the lows and highs, and the center will shift lower and higher as you adjust the relative levels of Apr 25, 2003 · Baxandall tone stacks had info Back in the day . Springs features one of the most iconic and unique sounding tone stack equalizers: the Baxandall EQ. In comparison, the more popular Fender tone stack is more interactive, changing the bass can affect the treble and vice versa. For hi-fi use, it is traditional to set the bass turnround point at 100Hz, and the treble at 10kHz. James Baxandall invented the negative feedback type equalization. Regular guitar amp tone stacks have interactive controls, and when set halfway up, you get a bass roll-off with midrange scoop. Current Schematic - https://live. So far I only tried one iteration where the Baxandall Tone stack is stuck in between the 10uF electrolytic cap and the 10K vol output pot. May 29, 2023 · Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Jul 15, 2019 · I added an Baxandall active tone circuit to an existing overdrive circuit and I'm having an issue. Negative Jul 8, 2021 · In a 'shock' move Gibson implemented a similar tone stack to the Bassman. From memory he drove the tone control stage with a stage of impedance about 1000 ohm. #9. Dec 15, 2007 · 20 IQ. Nov 25, 2010 · Putting the volume pot after the TLO72 will cause the tone control circuit to see a varying input impedance, depending on the setting of the pot. 2L man Friend of Leo's. The signal passes through the circuit/opamp and out to my volume control but the bass and treble controls don't affect the signal at all, it seems as if the signal is completely bypassing the pots. The kit will come with a PCB, all of the pieces to complete the kit, schematics, and a Resistor color code Feb 23, 2009 · Go back to the Duncan Tone Stack calculator. Hi all, not sure if this is the right place on the forum for this, but I'm after some advice on a tone stack. Mojo Hand FX Rook- Overdrive w/ Baxandall Tone Stack & Clipping toggle. 0 released in mid 2021 adds phase graphs for all stacks. Hello, it's true but with minor modifications, you can design a baxandall tone control without frequency shift according the wiper position. Same deal for Fender stack. The modern Fender TMB tonestack has a deep mid cut, more overall sweep, and more insertion loss than the E-style. 14-Day Return Policy. M. The Luna overdrive is the result. Acapulco Gold clone with baxandall tone stack. From kicad schem capture generate spice netlist, with prefix references U & IC with X checked then run simulate. Earthquaker also has the Palisades which is just a bigger Dunes with more options and a boost. View similar gear. It should be fed with a low impedance drive, as the calculator indicates, but several amplifier makers run it off the plate instead of a cathode follower. If you're working with opamps, you can easily add a separate isolated stage with the Bax control, but that's not really adding anything to the Bax circuit itself. This guitar effects kit delivers an extremely nice echo effect. Both have a centre frequency, where response remains almost constant, of 1kHz, and the maximum boost and cut are +-20dB and Aug 19, 2004 · Also, a good characteristic is that it doesn't end up at 20 Hz or 20 kHz with tons of gain as opposed to conventional Baxandall tone stacks. Search child forums as well Aug 11, 2020 · Search titles only By: Search Advanced search… In this series we will go over using LTSpice for things more commonly used for guitar pedal builders. Sep 4, 2021 · The Baxandall tone stack shows up in several guitar pedals: Colorsound Overdriver, PedalPCB Acid Rain, Thorpy Fallout Cloud & M. sh. Connect the output to your speaker cabinet for a neat experience. I made a rough layout for this one in Visio prior, to make sure it was in the realm of possibility. Invented by Peter Baxandall, the Baxandall tone stack is an active equaliser with controls that operate independently. Feb 24, 2020 · 2020-02-24 10:22 am. Here's a nice active Baxandall qualizer that I designed. Yes, you want to know for sure what the load will be, so you need a buffer, and preferably an opamp or JFET for high-Z. Search. #1. Baxandall, Wireless World, October 1952 Operator Adjustable Equalizers: An Overview - Dennis Bohn, Rane Corp. 10 Boost features the legendary passive James-Baxandall EQ stack which retains the true character of your tone. And the famous Vox AC series two-button control circuit: Vox Stephen Delft’s Moonlight tone stack Tone calculator The following is a usenet posting made by Mark Garvin in 1995 - it covers the operation of the Baxandall tone stack in some detail. To nd the frequency response of the circuit, the ratio Vout needs to be determined. the Fender and Marshall the same circuit, only the parts value of the change. It's a Baxandall circuit, commonly used in Hi-Fi. 8" wide x 4. However, those accustomed to Fender Treble/Middle/Bass controls might find it Tone stack types: Fender modern, Vox, Marshall, James (passive predecessor to Baxandall), Fender E series, Steve Bench, Hiwatt tone stack, and now the Big Muff tone stack used in FX units. Used – Mint. I ended up using the first channel less than the others. The equaliser section is the Bax Bangeetar’s standout feature, and it inspires the name. Some circuits are simple, like the Baxandall, which only uses a op amp to sum the signals back together, while others use an op amp at each Dec 5, 2006 · A "Baxandall" tone stack, often associated with older Ampeg amps, usually has only two bands; but they interact differently than the Fender stack and also differently than other two-band EQ's. Tone stack schematics (editable) « on: March 31, 2007, 07:33:54 am ». The broad curve can adjust a large portion of the frequency spectrum, but the gentle slope allows for a more natural Baxandall Calculator. Jul 20, 2023 · 14-Watt Guitar Amplifier with Baxandall Tone Stack Built and Tested. Might be better putting the volume pot on the output of the OPA134. This will change the characteristics of the EQ circuit. This pedal covers a wide range of overdrive possibilities, from light grit to fuzz-like, square-wave distortion. This article helps compute the component values Mojo Hand FX Rook - Overdrive w/ Baxandall Tone Stack & Clipping Toggle. Contact seller. Our key concerns are the overall attenuation level at midrange and the transition frequencies between bass, midrange, and treble. This circuit uses 100K pots. Give it a try Leevi Junior tube assistant Posts: 114 (3/7/04 5:42 am) Re: Baxandall tone stack Aug 21, 2020 · 3 bands are too many for this equalizer, the controls become dependent on each other (not very much, but noticeably). I added a PCB layout to the bottom of the post. We streamlined the circuit into its core gain stages and dual band shelving EQ, for Apr 13, 2019 · The “James” Tone Stack. Variation: Passive, single bass capacitor, single treble capacitor. Apr 20, 2010 · April 20, 2010. Butterfly-shaped curve. The PCB is is approx 3. Haven't found too many other pedal schematics around (apart from the BB preamp, which uses the same tone stack as the FA-1) that have active Baxandall tone stacks. The James/Baxandall Tone Stack. The Baxandall circuit was designed for hi-fi (before there was stereo) in 1952. I think it's called 'James' or something. ya mb rx ax dv pf yj kk ep nl