Guitar amp loud pop. Jump To: Quick list. In some amplifiers they solve it with relays to prevent popping. Its funny. Check Amazon. If you’re expecting faulty or dirty power to be the issue, try things like replacing the power cable first. If one produces the noise, replace it. 3 days ago · Roland JC-40 Jazz Chorus 2×10 is a highly versatile combo guitar amp for amazingly detailed clean tones. This surge can create a sound wave audible as a pop. Aug 2, 2023 · The EVH 5150 Iconic Series 40 is my top recommendation for a great punk rock guitar amp. Could be noise on the tube heater supply. This should subside after a few seconds. This will prevent a loud buzzing or crackling sound that can be made by the cable touching your hands or any other object caused by the amplifier making contact with your bare hands. Welcome to r/guitar, a community devoted to the exchange of guitar related information. Jan 9, 2012 · I have a 5-6 year old Fender FM 212R solid state guitar amp which had some problems recently. The amp has a versatile effects section with vibrato, chorus, reverb, and distortion. Replacement of filters caps, bias cap, bypass caps, 3 progs cable, bias etc. The pop that you hear from the standby switch on your Fender Deluxe Reverb is actually normal. ) You use said switch to let it warm up, you shouldn't have to turn all your knobs down (and if you don't have Jul 28, 2022 · The effect is a feedback loop produced by the amp feeding the guitar, which feeds the amp, which then feeds the guitar again, and so forth. Posts. #7. As mentioned, switches can be a cause. While I was about to adjust the bias further the amp made again real loud noise (no guitar connected to the input). Rooms sizes change as does the materials the room is made from. If none of that works, if you have a buddy or another amp/guitar setup, try it on that, see if you can replicate the problem without any of your gear, and just adding in the pedal. mine does that too, its and SS (at least mine is) Most amps will. I've had the tubes changed very recently, so I don't think they're the problem. I use a Mesa Boogie Triple Rectifier and normally when I switch from the first channel (clean) to the second channel, the amp pops loudly. The same switch can also block the 60-Hz buzzing and other undesirable sounds that can otherwise come from a floating input. This may fix the problem. Feb 8, 2018 · When the string is open it sounds perfectly fine but otherwise there is a sound pop that comes from my amp. This can also be used for an output tube that’s potentially causing the issue. Put a lower gain tube in. Charvel So-Cal Mod Anyone else get this? Why? Dec 10, 2012 · Hello UG, On Friday I received my brand new Fender Blues Deluxe and I really like the clean tones and the dirty tweed tones it has, however since I got it, I've noticed a very loud "pop" followed Jan 5, 2019 · 2019-01-05 5:33 pm. 99. When you unplug the guitar end of the cable, you've broken the connection, but the switch inside the amp still thinks something is plugged in. I'm going to monitor it a few more days to be sure that it is the amp creating the noise. Mar 4, 2013 · Your guitar amp probably has a gain of 5 to 20 anyway, so 50 mv that gets to the input stage will cause your speaker to pop. The Fender Mustang LT40S is genuinely a standout guitar amp. I am however interested in becoming an electrical engineer and I would love to figure this out with help of course. Please note that it is normal to hear a small click when changing channels. Also, rookie question here, but is it possible for an amp to negatively Apr 4, 2022 · The Fender Mustang LT40S is a portable, 40-watt guitar amp with two 4-inch speakers, easy-to-use design, and a range of classic tones. In this case, into our input and output coupling capacitors causing "switch pop. In your amp, every time you switch it on you Hi, today I had a problem with my amp. It's not a high pitched "pop" but a low one. This prevents loud pops and protects your amplifier and speakers from sudden jolts of power. Julian Vittorio. Worry about your amp when it stops working, and don't worry about minor stuff like this. Throw in an effects loop and decent reverb and it's hard not to recommend the HTR5. Dec 24, 2022 · 5 Steps To Correctly Turn on Amp 1. You should hear loud noise. The typical one is the «hum» which are harmonic components of the 50Hz or 60Hz network fundamental. You want a capacitor because they have resistance that gets lower and lower as the frequency goes up, and pop is a high frequency sound. Apr 8, 2010 · Apr 8, 2010. 047 capacitor and even a new switch. I was resigned to take my amp in for repairs at this point, but as a last ditch effort bought a whole new set of pre-amp and power amp tubes, and behold the problem vanished. 11-19-2013, 10:50 PM. If the voltage is low, this could be the cause of the humming noise. The room sometimes can put handcuffs on our ideal amp tone. A guitar amp can produce a crackling sound due to various reasons including a faulty output line, a faulty power tube, bad soldering, an improper connection between the speaker and the amplifier, and more. I just got my Fender Hot Rod Deville III today and I noticed that there is a very loud pop when switching from the dirty channel to clean. If you hear a "thud", that preamp tube is microphonic. If you're dealing with a separate "preamp+poweramp" combo, turn preamp on, turn power amp next. Do the reverse when turning things off. May 4, 2018 · Amps. Dec 20, 2017 · 3. like an open ground, etc. Apopka, FL. hi gang. I've had amps that do this, and heard many others. If that doesn’t help, it’s likely there’s a problem with the amp or radio itself. This may smoke out a problem with an intermittent solder joint. Nov 26, 2014 · Join date: Oct 2014. Jan 26, 2024 · The design of the amp has a hard-wired foot pedal which has about 25' of cord soldered in, and that cable carries live signal. ” If this causes the crackle, listen carefully to it. Cool cheers. i have seen a post here about a "pop" sound ( coming out of speakers, no matter in input) when shutting off amp. I have a '68 Twin Reverb that makes a loud noise/pop whenever the standby is turned off and the amp is turned on. Nov 9, 2018 · 'Popping' is a common frustration in many brands of older SS amps. When you turn on your amp, a constant supply of voltage runs through your amp. Jan 11, 2023 · Amps can pop and crackle due to various reasons, such as worn-out or faulty tubes, dirty or damaged pots and switches, or loose cables and connections. Jul 11, 2021 · HIRES_FAN said: ↑. Jul 21, 2014 · Updated on Jul 21, 2014 at 12:19 PM. Peavey Bandit 112 Guitar Amplifier with TransTube Technology: Solid State 80W Combo 1x12: $450: Read Full Review Below: 25. Mar 25, 2024 · Gear. I put all my vintage amps in order. Mar 21, 2017 · Location. Yes, I know it is crappy, but I really do NOT need anything better for a while to come, plus I can take it anywhere I want. Then I'll go to the dealer and take advantage of Rega's warranty. Its figgin loud to, then after that its fine doesnt do it. So I was playing my amp for a while and turned the volume down on my guitar to take a phone call. Apr 29, 2021 · A quick fix, plug a short 1/4†audio cable from the pre out to the power amp input. Sep 24, 2023 · Instead of turning your amp off and on repeatedly, use the standby switch to mute the output. $549. Shake the guitar, shake the pedal, hell gently try and wiggle the cable going into the amp. Pull the EL34 power tubes and clean the pins and socket contacts with electronics contact cleaner. Jan 1, 2013 · The popping you're hearing is nothing more than the voltages from the power supply collapsing. If you need an amp on the cheap, have a look at our best budget guitar amps under $500 for some bargain buys that are gig ready. . mike_ozzy. Sep 24, 2009 · Because if it does, the second tip can sometimes come in contact with the tip of the cord and sends a signal to the amp which results as a popping sound. I jumped about half meter from the chair and quickly turned the amp off. It was loud enough to wake me up last night. Our pick of the best amplifiers for all budgets from Fender, Vox, Blackstar, Tone King and more. Nov 14, 2023 · Well-Known Member. Nov 19, 2013 · Tweet. I turned the volume Dec 10, 2020 · 1. Oct 19, 2016 · When you take your amplifier out of Standby mode, the power supply needs about 5 seconds to level out. I tried cleaning the sockets, reinserting the same tubes a bunch of times, but the problem persisted (damagingly loud pops / crack sounds). Any decent "integrated amp" should have a functional "anti-thump" circuit or equivalent. Clean the post preamp volume with Fader lube. #2. Hello, I am fairly new to guitar amps, so let alone fixing circuit boards. An underpowered or cheap power supply can result in your pedal crackling, popping, and buzzing. Could modify for DC. I've tried volumes up/down, guitar plugged/unplugged etc, and still getting the noise. It features a USB connection for the Tone LT Desktop app, 1/8-inch footswitch connection, and weighs just 12. " And there it is. Especially with efficient speakers. My only problem is that it pops when I turn it on. Why it made the cut: The Fender ’65 Deluxe Reverb delivers legendary warm electric guitar tone and plenty of volume, making it Jul 31, 2020 · why would my guitar amp make an extremely loud pop when powered on even with no instrument and volume and gain turned all the way down it doesn't continue to make poping noises but has a lot of Apr 8, 2015 · By Sweetwater on Apr 8, 2015, 7:01 PM. the pop is just the May 2, 2008 · Join date: Feb 2008. All the tone controls etc work. May 14, 2023 · 24. (clean/drive/more drive) Foot switch works. If you hear noise jump to The amp shows signs of life but does not put out any guitar audio. Plug your guitar cable into the guitar first. By Daryl Robertson. These come at random but can also be triggered by hitting the amp a little. Every time I turned the amp off it made a loud popping noise. Peavey Ecoustic E208. Try plugging in a guitar cable, turn up all the amp's volume, gain and master volume controls up a little and touch the tip of the guitar cable's other end. Next, you’ll need to take the cover off the back of your amplifier so that you can access the tubes and other inner components. My dynaco hifi had a gain of 50 in the preamp and another 10 in the power amp. Orange County. This includes charging up capacitors. Otherwise, continue the process and replace any other preamp tubes that cause the sound. If there is a pop, remove it from the chain and the next pedal. Likewise when we unplug the guitars and it is turned on. Maine. Contributions from. Tap the offending board and see if it makes a noise. When I get one in for service I check the resistance on the contact closure at the power amp in jack. LIST PRICE $799 MANUFACTURER Roland Mar 10, 2023 · These amps are designed for use at home, and some of them will sound very loud in smaller spaces. Ok I have a Fender Frontman 212 DSP. When you throw the standby switch from On Mar 15, 2023 · Blackstar HT5R. last updated 25 March 2024. I left my tube-amp on standby for about 4/5 hours on accident (this happens more often than just this once, but didn't think it would hurt it), when turning the amp from standby to on, there was a loud pop and there was a constant monotone buzz on the background of my amp. May 26, 2009 · Just plug your guitar straight into the amp, turn the volume up high and very gently tap the bridge (or metal on the switch etc), I can seem to make it louder by licking my finger and then doing it (but make sure you are not touching any of the other metal parts at the same time as it stops it from happening). Hey guys every time I intially turn my EHX chorus pedal on it makes a masive pop noise through my amp. Powering Down: When you’re finished playing, it’s a good practice to turn off the standby switch before powering down your amp. He said he has a Fender Super (something), red-knob, solid state amp; he just picked up a pedal steel and wants to use it for that. As those contacts bounce around and settle into place, they generate a small amount of current and dump it wherever they can, whenever they can. Get a DS-1 and a CE-2 No more true bypass = no more popping. By identifying the root cause of the buzz Feb 17, 2017 · My first electric guitar and amp were a low budget no name Korean made combo purchased brand new from Sears back in the 80's for about $100. When we turn an amplifier on, capacitors charge up very quickly, leading to a sudden spike in the electric flow which can cause the pop. There are some great acoustic guitar amps out there that meet the above criteria: Fishman Loudbox Artist. The Blackstar HT5R is the perfect mix of a great gain channel for pop-punk, loud enough to gig but useable at low volumes/bedroom practice and a very affordable price. The sound really doesn't degrade tone, and for the most part the it sounds pretty clean. Also, it made a loud popping sound when switching off the amp, regardless of the volume settings Jan 18, 2017 · 01-19-2017 at 05:59pm. Gibson Flying V. Jul 11, 2008 · Join date: Jul 2007. If you have guitar related questions, use the "Search" field FIRST, Then ask the community. New one may be microphonic. Peavey 6505 120W Guitar Amp Head: Tube 120W Head: $1000: Read Full Review Below: 27. The basic thing is to know how to distinguish the different types of noise. I am appealing to you Fender Warranty techs out there since this is a popular amp and by looking online it seems to be a common problem. I have a problem with my Marshall MG10CD amplifier. Posted August 5, 2006. The only problem is the clean channel isn't clean! It's a little hairy at all volumes. If the pop is gone, go to the next step. When you flip the switch and put your amp in standby, you are disconnecting the high voltage half of the power supply. In reading about it, there are many threads/articles where many different causes of the popping are suggested/discussed/argued about, etc. I've now identified the following conditions cause the pop: Turning the amp off with the power switch; Pulling the plug on the amp while it is switched on; Stopping the turntable (the amp and turntable deck are one unit) The last condition is particularly interesting, since the amp does not lose power when the turntable stops. Dec 19, 2010 · 61 IQ. This also Dec 10, 2017 · First thing to do is unplug the RCAs from the amp and turn the vehicle on or off depending on when you hear the pop. Not a big deal. All the LEDs work. The amp only has one channel, and this happens at all volumes that remain audible (for example, won't Jul 17, 2008 · I would have modified the amp before getting rid of it. Power amp off first, preamp next. Check Thomann. If it fails, pop. I’m working on a relatively small solid-state acoustic amp (Carvin AG100 I have the schematic, and please know/recall that Carvin is now defunct so please don’t refer me to their May 15, 2011 · Whenever I turn my amp on, it makes a "pop" sound. Mar 16, 2023 · I will say I have heard other amps make a slight, quiet little pop when turned off but this is quite louder than I’ve heard before…dude before me said it’s done it since he had it and he’s had no issues with it as far as playing or sound. Matt McCracken, Ross Holder. Understanding why your guitar amp buzzes is essential in troubleshooting and resolving the problem effectively. When 'off' the amp is dead quiet, so the PS filters are doing their job Jul 19, 2023 · For the clean players among us, brands such as Fender and Vox are two brands to pay attention to. Nov 4, 2023. Sep 7, 2022 · Step 2 – Remove The Cover. 2. I've lowered the pickups, raised the bridge, and made 100% sure that my strings are not impacting my pickups but nothing is working. After 30-40 minutes or so the amp starts making loud popping noises. I'm not sure if this is normal or not. When connecting or disconnecting high voltage, the surge of the voltages often produce a pop noise. The output transistors would be the first to fail, and they are rather costly for your high powered amplifier (probably Mototola MJ21194 or equal) Aug 31, 2018 · 20 IQ. Another issue could arise if your amps audio components aren’t properly shielded from the mains power. Using the wrong or faulty power supply can lead to noise and buzz and cause your pedal to get damaged. Hi folks. Your amp will amplify not only the guitar but also any of the extra noise present in its electronics. A 20w solid state amp will likely not be loud enough. We get around this by only plugging in or unplugging when the amp is turned off. Quote by alkalineweeman. The amp for the most part sounds pretty good, but on occasion I get these popping/crackling noises the that occur what I consider pretty randomly. oh, and send me your RAT. I did all the known mods *; a resistance across the switch, a 0. 4. Feb 2, 2024 · When an amplifier is turned on, it goes through a sequence of events that can cause a sudden surge of electrical current. Replace each tube in it's original position, checking that the pins make nice tight contact in the socket. Jan 15, 2010 · That's not how you warm up the amp by the way (unless you don't have a standby switch. Marshall AS100D. In my experience 50 watts is a minimum for "loud" bands. Start with just the Klone, Klone in to front of amp, guitar into Klone. Oct 4, 2010 · NV. If you try to change channels while it’s doing this, you may notice a loud popping sound. Reflections can play a bigger role on some nights more then others. Yours does seem a bit extreme. I have checked the archive here and the problem is discussed but never resolved, or at least the fix was not mentioned. Jun 2, 2023 · Top Acoustic Guitar Amps. Peavey Ecoustic E110. Rick is the founder of All Stringed. May 11, 2023 · Best overall: Fender ’65 Deluxe Reverb. Aug 5, 2006 · Members. Marshall AS50D. I thought it was normal. Then everything sounds fine as I/him plays. The popping noise happens even if there's nothing plugged in. A fellow I got to play with yesterday asked if anyone knew what the story is with amps that have that loud pop when switched on or off. 5 pounds. I'm certain it is not the tubes since I have replaced all the old Nov 4, 2023 · Tom Stegeman. If it doesn't pop that way, then the power switch is sparking. Once in a while, one will encounter a problem with an intermittent resistor as well (loose end cap, for example). I have this situation (fairly often" when shutting off my old HK integrated amp (300A). Capacitors are often used to "absorb" the excess "power" that causes the popping (as you suggested). I finished my Bandmaster AB763, the only thing I block and the very loud "pop" with the Stanby switch. Normster wrote: I'm at my wits end trying to fix a popping noise from the standby switch. that usually works for me. In some situations it can be solved with a series resistor and capacitor on the standby switch. Easy to get around i Aug 14, 2012 · I recently bought an Acoustic AG30. SEE IT. Their guitar amps are mostly tube amps, so they produce an organic, harmonically-rich tone. Moving away from the amplifier will help a ton, but the type of pickup Nov 5, 2020 · Stanby switch loud "pop". If you’ve never done this before, you’ll probably need a screwdriver to remove the small screws which hold the cover in place. DC on a speaker coil can only be expressed as cone in, cone out, and heat. Aug 29, 2006 · Joined 2004. A working amplifier can produce some “normal” low-level noise, especially at high gain or high volume. If you don’t want to play pristine clean, 20w is more than enough. The first step in troubleshooting the amplifier hum is ensuring the power connection is secure and undamaged. To test for this, leave the power switch on and just pull the power cord from the wall outlet instead. I replaced them with the exact replacement transistors. That can also cause a 60 Cycle hum. One frustrating thing about playing electric guitar live is the variation in tone from night to night. It did that until the day it died, about 5 years ago. Put a mini amp in a proper venue though and it’ll soon get swallowed up by the drums, bass, PA system, and other guitars. Location. 122 IQ. I've determined that it's definitely not the speaker. Endorsing: Yamaha, Ampeg, Line 6, EMG. It depends. The amp has the sonic character and quality of its bigger brother JC-120, which became an iconic sound with great clean tones. #1. g. , tremolo and reverb). As was mentioned, it would be good to install an arc supressor (disc cap) on the power switch? can Feb 7, 2006 · by ayan » Sun Nov 22, 2009 6:44 pm. Take your guitar cable and plug it into the guitar itself. The first time I heard about the "correct" power up sequence was from reading it in this forum. Then I heard a loud, boomy pop from my amp. When my fender rumble 25 combo amp is turned on and I then plug my bass or my son's guitar into the input jack, there is a LOUD pop. Check Latest Price. Mar 30, 2023 · Tap each tube with a pencil. As has come to be expected from the Katana name, Boss has delivered a bass amplifier packed to the brim with features, including three different amp settings – Vintage, Flat and Modern – giving you tonal options from jazzy to metal at the flick of a switch. You could use this amp for every type of good punk tone, from hardcore and metalcore to pop punk. 141. This is a forum where guitarists, from novice to experienced, can explore the world of guitar through a variety of media and discussion. I clean and burnish to contact to assure there is zero resistance there Other issues: -Mid pot causing a popping sound when turned, very loud. It's relative to the Sep 14, 2015 · The JC-40 is an ideal platform for a modern pedal or rack effects rig, as well as the latest amp modelers, guitar synths, or even acoustic-electric guitars. Reply. Apr 4, 2006 · All voltages (including bias) are ok. I have checked to make sure the cables are not bad/poorly soldered/twisted. Loud and static-like: Check all of your amp’s connections! Its just the nature of the beast. When I switch the power off a loud high-pitched pop is heard. Hello, I have a problem where my bass amp keeps randomly either cutting out completely or the volume gets very quiet, and then it randomly comes back to normal volume again. Aug 9, 2008 · SOme amps pop because the power switch arcs as it opens. I am playing a Fender MIM Telecaster through it (if anybody is curious). This is an old Crate CR-112 from the 80s I believe. Sep 24, 2023 · This can cause lots of noise, including 60 Cycle Hum*. Tube amps are perceived louder because of the way they compress when they start to break-up. Reverb works. (I don't think yours has a standby switch). No, my guitar has passives. poppop pop pop. Fishman Loudbox Mini. The solution I found was to plug a headphone adapter in when I turn the amp on, and take it out, but This seems to be a common problem but there seem to be a million potential causes. Turn down all the volume controls. It isn’t hurting your amplifier. If by "clean" you mean "get a finger right Apr 30, 2024 · Boss Katana KTN210B. If you have access to a multimeter, you can use it to check for voltage at the power supply end of the amplifier. As those voltages collapse, the preamp and amp circuits also begin to collapse and an abrupt signal Oct 8, 2007 · turn down the volume on your guitar or unplug the cable from the amp. Disconnect all of the pedals from the front of your amp, and try them one at at time. Oct 5, 2021 · Turn the amp fully on, and tap each preamp tune with the eraser end of a pencil. Turn down any internal effects that come with your amp (e. Turn Down Internal Effects. Sometimes a cap in there will discharge when the amp is turned off, and it makes a pop. 2006-08-29 10:01 pm. Nov 14, 2023. Oct 15, 2004 · If you take the measurement and get over 30 mV on either channel, shut it off immediately. So that is why I have included a video clip to demonstrate. #8. Best Guitar Amps 2024: 15 Supreme Tube And Solid-State Amps For Home, Studio And Stage. Playing live is a little bit of a chess game. Troubleshooting: Step 01. It was having issues with some of the knobs, cracking sounds, no audio in certain volume knob positions Nov 16, 2009 · Switch to all boss pedals. I used to think the amp was before the preamp in the power up sequence during the entire 25+ years I owned my Adcom separates and never heard a pop or had any issues, not even a blown fuse. Jun 30, 2023 · Guitar amps producing crackling noise is more common than you may think. Easy-peezey, lemon-breezey, cheese. The power supply charge lasts long enough to amplify the resulting spike. The amp is a fame T120h. Even if you’re a tube distortion purist, the amp is small enough to fit into any rig without sacrificing portability or those alluring JC clean tones. So, it's like a giant antenna for noise! Just turning the reverb 'on' induces a pretty strong 'buzz' in the thing. So the pop still happens at the amp input, but the amp ignores it. Jun 16, 2003 · I bought a Crate BT15 amp a few days ago. Shorted outputs transistors usually blow fuses or show DC on the output. And probably not the speaker cables or power supply. Now comes the technical part, “ Hit the top of the amp with a fairly large blow. These issues can create electrical noise and interference, resulting in audible pops and crackles in the sound output of the amp. No sound with the guitar. Apr 11, 2005. Its brand new as is my guitar (Ibanez GRG270) and the only thing I've done to the amp was cut off Jan 31, 2012 · JimmyM. . The intermittent popping noise is back. Faulty Power Supply. I turn the amp on and off a few times to demonstrate the noise. After a while I fired the amp again with guitar connected and the amp is silent. Fender amps tend to sound a bit warmer and smoother than Vox amps, which are designed to sound quite bright and crisp. If they don't, you can carefully bend the contacts with a micro screwdriver. In simpler terms, to turn off your TUBE amp, hit the standby switch then hit the power switch. It sounds like “brrrrrr” and is misnamed ground noise Oct 5, 2020 · Hello, some popping is to be expected in most guitar amplifiers. If the pop is still there, check your grounds. For my guitar amp, that only happens when I have the volume up, not when I have it all the way down. The amp now works, sets quiet, no hum, all the channels work. Peavey Rage 258 Guitar Amplifier with TransTube Technology: Solid State 25W Combo 1x8: $130: Read Full Review Below: 26. Generally, when a solid-state amplifier begins to make a loud THUMP when powered down, it is about to fail. 20 IQ. Turn on your amp and plug in the cableWiggle the cable when it's not plugged in and see if any crackle occursif none, then wiggle the cable when plugged into the guitarif you get a crackle, it's most likely a bad solder joint or a very slightly bent terminal on the "hot" lug (the part that comes in Feb 20, 2022 · Following are a few of the most common reasons why your guitar might be making these unpleasant sounds and how to fix them: 1. If there is not pop, add the next pedal. Try a new rectifier tube. Aug 22, 2018 · I show how to repair a guitar amplifier with volume/tone controls that snap, crackle, pop, cut out when you turn/adjust them, by cleaning the pots. If it was eating tubes probably it either has too high a quiescent plate current (excessive dissipation) and that's fixed by decreasing it (modifying the c-j biasing arrangement or converting it to a more sensible setup) , or excessive screen dissipation. Humbucking and noiseless pickups. The reason it happens is because when your amp is turned on and running, there is a constant supply of voltage running through your amp. The amp head's lights do NOT get dim or flicker when this hhappens. The circuit is a straight up hrm/bluesmaster clone w/precision power supply. Thanks. After a gigging, it started to make crackling noises even if every volume pots were turned down, it did it with every cable, with or without any guitars. Problems solved. In this article. Jan 31, 2012 #8. Guitars: PRS Custom 24. Fender Frontman 212R - loud popping and crackling. Fender Acoustasonic 90. The 5150 is a classic high-gain amp that is responsive, articulate and has a fantastic mid-range punch. 151 IQ. Common causes include issues with pickups, poor shielding, grounding problems, faulty guitar cables, pedal troubles (if you have one), and even potential problems with your amplifier itself. I had one of those that drove me nuts. The noise seems to be coming from the power amp side since it's there with preamp tubes pulled but goes away with PI tube pulled. hb go ur dc sw ci kl an aw qh