$6K PRS Line 6 Giveaway

MXR CSP101SL Script Phase 90 Pedal

Item ID: Phase90Script
MXR CSP101SL Script Phase 90 Pedal
Reviews for

MXR CSP101SL Script Phase 90 Pedal Reviews

Vintage-style Phase Effect Pedal for Guitar and Bass

Add an MXR Custom Shop Script Phase 90 to your pedalboard and instantly transport your tone back to the early days of rock, when shimmering chords and warbling leads were giving creative guitarists the fuel they needed to redefine modern music. True to the specs of the original Phase 90 model that MXR made up until the late '70s, the Script Phase 90 gives you both the expansive headroom and exceptional clarity that made this such a popular effect, plus the warmth and smoothness those old circuit designs were known for. Top it off with an original orange paint job and script logo, and the only way you can tell the original apart from the reissue MXR Custom Shop Script Phase 90 is the handy status LED.

More Details
Price:$139 and 99 cents
$24.00 suggested monthly payments with 6 month financing‡ 36 month financing available* with $399.00 minimum purchase on one invoice.
Add to Cart
Backordered - More On The Way!

We expect more from MXR in just a few days. Order today to reserve yours now, risk-free. Estimated by May 11.

Notify me when in stock
Page 1 of 1
January 16, 2026

One Knob, Zero Bad Tones

By Liam C. from Stamford, CT

You truly cannot go wrong with this pedal, so much versatility without needing several controls to get confused by. Set it really low to sound like Eddie Van Halen, set it more moderate to sound like David Gilmour, and set it really high to get experimental and almost rotary-like. The Script version is slightly more "classic" sounding and it's only $\ more (as of me writing this), so it felt worthwhile to me to get the "vintage correct" tone, but if you want to save a few bucks I'm sure the block-logo will do you just fine. Get some version of a Phase 90 and thank me later.

December 25, 2025

Great Phaser

By Shawn K. from JACKSON, TN

What can I say... it's the Gold (er... Orange) Standard!

December 2, 2024

This is the way

By Tom J. from Wiscasset, ME

I had the EVH Phase 90 but sold it because I am an idiot. So when I decided to get a new one I got this. As far as I can tell it's the EVH version in script only mode, for the same price. The only questions were "why pay the same for one less mode? Why not get the red one again and have block mode too??" Three reasons:
1) I never used block mode on the EVH except when I accidentally hit the button. Now that won't happen.
2) I did not like the glaring blue light. This has a red light.
3) Orange.
The other option was the 74 vintage script but that has no LED, no 9V, sounds the same, affects tone, and costs more. I don't give a crap about hand wired vintage.
This is the way.

January 23, 2024

Simple, Warm, Vintage Phasing

By Brian M. from Landenberg, PA
Music Background: Hobbyist for 20+ years

It doesn't get much simpler than one knob, and that's the way I like it. From what I understand, the Script model lacks the resonance/feedback of the block model and other more modern phasers, and has a less extreme whoosh. I play anything from funky blues to stoner doom, and this pedal works phenomenally for the sounds I want. The sound is warm and gooey, and there are nice formant (vocaloid) sounds when it sweeps. It's an inspiring pedal. It stays out of the way and just *works*. The only thing I would change is to be able to disable the LFO and sweep the filter manually, but other than that, it's a winner!

January 2, 2024

Love It

By Sweetwater Customer from New York

Great sounding phaser

December 7, 2023

Really?

By Nigel from Colombia
Music Background: It don't come easy. I love it.

The best of the best. Simple.

September 19, 2023

Less is more

By Stuart from Broussard, LA

After trying other more adjustable phaser pedals and still not being happy, I went back to the basics by retrying the MXR. I had the block lettering version in the past did like it, but eventually sold it. With this script version, I found the sound that I was looking for right out of the box. It sounds better than I remembered, really clear and intense, especially with a lot of gain. In a world where pedals have more and more knobs, sometimes you only need one. Give the script a try! And thanks to Damian at Sweetwater for all the help that he's given me lately, you rock man!

August 30, 2023

Orange creamsicle

By Sweetwater Customer

I use this on my bass guitar with the rate at 10 o clock. So cool! So very musical, thick, lush, creamy. Just such a classic sound that works great in a mix on absolutely anything. Keeps bottom end really well for a standard guitar phaser and is just such a vibe without being typecast. Love MXR, love this pedal!

August 17, 2023

It's the best

By Tim from Prescott, WI

I have been playing for 30 years and tried everything. This is the best.

July 10, 2023

Mxr script logo

By Sweetwater Customer

Bought the demo model. Sounds great and though everyone talks about EVH and getting his sound, that's cool but not what I was after. I wanted a Waylon Jennings ( are you sure Hank done it this away) sound. Waylon used phase a lot for his sound. And it's going to meet my needs.one disappointment was, I took the back cover off to remove the battery if it came with one. It didn't. But noticed that the switch is soldered to the circuit board
The original 74 models used a stand alone 3dpdt hand wired switch. So it isn't an exact replica of the old pedals. The circuit board mounted switch can fail over time and sometimes Crack the board itself. Still I'm going to keep it. It will most likely last a few years.

May 26, 2023

Great phaser

By Woody P. from Fort Wayne
Music Background: Guitar player

Excellent phase. Would highly recommend

March 14, 2023

EVH Tone

By Dennis from San Diego CA
Music Background: Mainly surfing, fish tacos, bong rips, and jamming, but not necessarily in that order

This is the pedal for the early Van Halen sound, at about 3 or 4 you have that classic swirly sound that adds so much texture without dominating your tone, it sounds so good. It's subtle at that level but makes a huge difference. If you're wanting a more in your face phaser sound just dial up the knob. And thanks to Tiberius!!!

March 7, 2023

A Classic Pedal

By E M.

Instantly a recognizable sound in rock music's hayday. Has its place in modern rock as well, and on my board. Cool vintage color too.

February 15, 2023

Excellent

By KH from Zionsville, IN
Music Background: Hobby Player

I chose the Script after watching a shootout video comparing the various models. Extremely happy with the choice. Does exactly what a Phaser should do. Iconic sound. Perfect

January 27, 2023

One knob and the truth

By nolan
Music Background: hobby player

Im not really a big pedal guy per say however I love the classic effects from the 60s and 70s as that's primarily the style of guitar I play. I don't have an actual pedalboard I more or less run either guitar cable amp or will just grab a couple pedals at a time and run them Hendrix style daisy chained in front of amp. anyhow I always wanted a phaser and this one sounds really nice. has a deep almost dark like quality. On another note every MXR pedal I have bought so far has been amazing build and performance quality. Ive owned the phaser, chorus , and the carbon delay and all have been visually, sonically and physically up to snuff!

August 19, 2022

The MXR Phase 90 is a great addition to the pedal board.

By Greg J.

The MXR Phase 90 is a great addition to the pedal board, particularly for someone just getting started with effects. This essential pedal is a classic. It provides basic phase features at a reasonable price. The MXR pedal is constructed using a durable metal box. The knob, switch, and I/O jacks appear to be high-quality and built to last.

Greg J.

August 3, 2022

MXR Custom Shop Script

By Mark
Music Background: Musician 40+ years.

I listened to them all, and decided on the Script. It think it sounds warmer, and is more subtle than the Block. I'll seldom use this... but when I do, quality sound is there!

May 17, 2022

Excellent

By Gregory from Grove city ohio
Music Background: Bass player vocalist for beyond neptune

This pedal is great. my bass blows kisses at it.
Looks cool too.

January 10, 2022

Phase 90

By Sweetwater Customer

Makes me want to bring back the Doobie Brothers

December 4, 2021

MXR Phase 90

By Eric B. from New England
Music Background: Working musician who plays guitar

I had one of the MXR Phase 90 that I bought back in 1970's when it was first released and had traded it way in a deal for a vintage tube amp to help reduce the cash amount needed to buy the amp at the time. Since I have gone through a variety of chorus boxes trying to recreate the ease and comfort of sound I had from the Phase 90. None of them even came close to capturing the unique sound quality I got from this simple and beautifully designed Phase 90. I am very happy to have this sound back in my gig bag. It is just a classic color tone in a well constructed package that is easy to use. 5 Stars.?

November 15, 2021

Script Phase 90

By Clowd from Illinois
Music Background: Gigging musician

I've avoided the modern version of this pedal because it just sounds too harsh. When I got this one, the first thing I did was run it through a Boogie Mark III. It totally nails the effect I was hoping for. It has a lot of presence, but it sounds natural and smooth through the amp, definitely setting a tasteful mood. Night and day difference from the contemporary version of this pedal, which dominates the signal in an overbearing way.

June 14, 2021

The phaser for me

By Sweetwater Customer
Music Background: 30 years of guitar and amp playing

I had a block script mxr 90, mr. black Gilamondo and OBNE dweller. This script MXR takes the best of the Gilamondo and makes it cleaner and perfect for when I jump off of heavier metal tones through my orange dual dark. Clean channel usage, in front of the amp. Sometimes I'll pop the script phaser on during a distorted solo. When I read it has that "have a cigar on me" tone, I bought it and quickly became my favorite phaser.

May 21, 2021

Deliciously musical!

By Zack P.
Music Background: 30 plus years at bass, guitar, keys and vocals

This was on back order, and totally worth the wait. The single knob is deceptively simple; it's more like a dial for a whole palate of moods. This has to be my favorite modulation pedal ever! Thanks to Jimmy Itela.
The gods made pancakes and MXR brought the syrup!

December 31, 2020

Just A Solid Phaser

By Javier M. from Phoenix AZ
Music Background: Professional

For the price I'm impressed. I'd call this version of the Phase 90 a little less "gooey" - a little cleaner than it's vintage counterpart that I've used, but that's an advantage for some people. This thing sounds clean, works with your core tone and other pedals really well. You can also use it for an acoustic guitar rig and it ads some cool flavor. The best thing probably is that it just sounds good and is easy as they come to use. Turn one dial and make music.

November 29, 2020

Phase 90 Script

By John from Washington Michigan
Music Background: Been playing for 50 years just for fun. Love recoding my own songs

Just what I was looking for my David Gilmour inspired pedal board. Easy to use and sounds great. Very good quality.

November 18, 2020

The Holy Grail of Phase

By Kaleb from Minnesota
Music Background: Instrumental, Rock, Prog, Dance, Cover

Smooth, beautiful phasing! I had the block logo for years and loved it, but I have been in phase heaven since acquiring this script reissue. This thing literally always sounds good... Slow setting= early VH, fast setting= Jimmy Page a la "Achilles Last Stand," etc. Buy this pedal!

November 8, 2020

Great Addition to the Pedalboard

By Sean
Music Background: Amateur Guitar Enthusiast

If you're searching for that vintage phaser sound, look no more -- this is the pedal for you. Feels well built and durable, like other MXR pedals. With just one knob to control the speed, it's super easy to use. Just kick it on and bask in the swirly, phaser-y goodness.

October 29, 2020

Love it

By Steve from SD

Love this pedal got it a day ahead of time, Van Halen's atomic punk is why I wanted it but Ive already applied it to a few of my own things, I just love it!

June 14, 2020

The phase you want

By Eric O. from VA, USA
Music Background: 45+ years of tone chasing

Simple, not costly, and the best sounding phase you will ever own. Just warm, sweet, phase deliciousness.

April 16, 2020

Fun, just pure unadulterated Fun!

By Phil R. from Statesville, NC
Music Background: Always a student.

I'm not an expert guitarist by any means and only have a tuner pedal, an overdrive and a fuzz pedal.

I wanted to treat myself with a bit of the kickback cash we got, and wanted something that would be fun, not practical, but fun.

I'm sure this Phase pedal is practical too for a knowledgeable player.

For me, it's just sooooo much fun to just plug in and whirl he dial around to different spots and with different playing styles.

The sound is fantastic, dead silent no background noise when not playing, but clear as a bell when I do. Love it clean and also a lot of fun with some drive pushed through it first too.

I believe the other reviews steered me right, and if you want an awesome and easy to use Phase pedal, this is well worth a try.

Read More
December 1, 2019

Classic Pedal

By Sweetwater Customer from New Orleans
Music Background: Guitar player in Bands since 1983

Best phaser ever. Simple but effective.
Warm tone and not overbearing.
Got it at a good Sale price from Sweetwater.
Fair pricing and the customer service is excellent.

November 9, 2019

It’s THE SOUND

By Sweetwater Customer

It’s the sound I‘ve heard in my head and on recordings for years! Waylon, James Burton, and many others. It’s perfect.

April 25, 2019

Just the right amount

By Chris L. from Lincoln, Nebraska

It has just the right amount of phase I was looking for. Great vintage\warm sounding pedal. This would be a great addition to any guitarists pedal board.

August 11, 2018

Get one

By Sweetwater Customer

Chewy,just right. Waylon at 1:00,Eddie at 8:00

July 22, 2018

It's A Phase 90

By DON D. from IA
Music Background: Garage Rocker

It sounds exactly like all the hype. Syrupy, warm, etc.. Absolutely nothing to complain about. It's simply a great phaser.

May 22, 2018

Simple

By Bill from Lawrenceville Georgia
Music Background: 35 years of guitar

I've had a number of phasers over the years starting with the ROSS Phaser from the 70's. All have been good, and while I like having the flexibility to control depth and mix, the Phase 90 simplifies use by keeping it to one knob for speed. That makes it the easiest to use and easiest to remember settings on.
I chose the Phase 90 Script over the standard Phase 90 because I thought it reproduced those 70's and 80's phase sounds best.
This is an excellent pedal that is well made-as are all MXR products-and I expect to get years of easy use from it.

May 13, 2018

Stick to the script!

By Twiz from Pittsburgh

This is a great sounding phaser pedal. I had the regular MXR Phase 90 and I didn't really like how that one sounded. -To my ears, it added an abrasiveness to my clean tone. The Script Phase 90 is a lot smoother, and doesn't color your tone. I like that this version has a LED so you can tell it's on at a glance. I can't say how it sounds compared to an actual vintage MXR Phase 90, but I do like how this pedal sounds. Highly recommended.

April 12, 2018

Back to the 70’s

By Randy from Tennessee

The mxr script phaser is super easy to use with one knob that selects mild to wild outer space tones and sounds.. really cool.
Great quality as usual from mxr and small footprint.
This pedal is quite and does not color your tone.
Nice addition to the pedal board.

March 10, 2018

Sounds Like The Ones From The 70s

By Phil
Music Background: Professional

This has THE sound you"ll find in the ones made in the 70s. Plus, you can hook up an external power source instead of taking it apart when you change the battery.

February 28, 2018

Flawless

By eugene s. from hoquiam, WA

Like stepping back in time.

June 19, 2017

Classic

By Ric from Plant City, Fl

Classic and for good reason! Killer tone and that vintage phase we all love.

April 29, 2017

MXR Phase 90

By Greg P. from Indiana
Music Background: Guitar/Bass

Works great for my needs.Great sales support!

October 25, 2016

Great Phase Pedal

By Rick from Long Island

The Script MXR Phase 90 pedal is awesome! Subtle, yet very noticeable effect that exudes that classic rock sound....easy to use, well built and a steal at $99 with free shipping! Thanks, Sweetwater!

October 19, 2016

MXR Phase 90

By Ernest C. from TX

Love this product. I also own the MXR Phase 45, however the 90 is much more transparent.

May 18, 2016

Durable No Frills Phasing

By James from California
Music Background: Guitarist, Recording Engineer, Gear Hoarder

I have gigged 4-6 times a month and practiced 2 times a week for over a year and this pedal is just as good as the day I took it out of the box. It is a nice smooth phaser and is a little more subtle than its non-script counterpart. Wish it had a mix or volume knob as well but its a good old analog pedal so you get what you get.

May 3, 2016

Better than the regular phase 90

By Nate from NJ

I was going to pick up the regular phase 90 but my sales engineer Joe Schafer (Ext 1393) pointed me to this custom shop script version and I’m happy he did. The Phase 90 is a great sounding pedal but this script version is much more transparent and lush sounding. Give Joe a call and pick one up for yourself.

March 30, 2016

Phabulous Phaser

By Dave G. from PA
Music Background: Blues, classic rock

If you're looking for classic tones This is the phaser for you, it's warm, full, simple to use and it looks classic as well! Discussed several different options with Clint Brantster and decided to go with Clint's recommendation and he nailed it. Thanks Clint!

November 16, 2015

Fantastic Phaser

By Sweetwater Customer

I was looking into getting a Phase 90 because of its watery phasing and the great number of pros that also use it. (Gilmour, Page, & Van Halen among others.) I was comparing model this to the standard "block logo" and the script model without the LED. I settled on this one (CSP-101SL) because it offers smooth, subtle phasing at a good price, plus it has a power jack! I mostly play it clean with the speed set around noon, and it sounds great. (Have a Cigar sounds fantastic.) With distortion added, you can go from a slow phased EVH Brown Sound to a faster faux-Univibe Hendrix sound. With the exception of a tiny bit of noise added to the signal, this pedal is sure to please.

July 28, 2015

See my existing review for a correction

By Aaron A. from Washington D M V
Music Background: Geeetarrrr Picker

The pedal I bought is the MXR CSP026 '74 Vintage Phase 90 Pedal that IS a "Custom Shop" model "Script" MXR Phase 90 - but the CSP101SL does have a DC power jack. My original review is for the The MXR CSP026 '74 Vintage Phase 90 which DOES NOT have a DC power jack. BTW, I took it to my friends auto repair shop, he got a pneumatic drill and gently carved out the right shape and gently moved the 9volt battery cable from inside the MXR to right outside the metal housing. He even found a small grommet that fits the new opening perfectly, so with the case back screwed on and mad stomping neither the case or my weight will strip or cut those tiny power wires. Now its just like Paradise! Thanks so much Jimmy D and Ray in Rockville MD. Sorry for the mix-up and happy jamming Y'all!

June 28, 2015

This is The One You Love

By Aaron A. from Washington D M V
Music Background: guitar picker and rocker for a good little while now

If you are looking to nail the tone of a certain West Coast guitarists' incendiary lead guitar tone from the late 1970's, this IS the one you want. There is actually LESS phase effect, which is perfect for my early 90's Gibson Les Paul going into the front of a modded Marshall DSL50, the phasing somehow rides slightly behind your own guitar tone. Yes, you gotta place it BEFORE any overdrive and distortion just like Eddie did (and I place mine before ISP Decimator noise reduction), and I can't wait to connect it to the SAG input of my Voodoo Labs Pedal Power 2+ and starve it of a little bit of power. Docked 1 star for NO AC/DC power jack, it only takes a 9 volt battery, but I connect my 9 volt battery adapter cable from Voodoo Labs power supply. Right now its on my board with the back of the case off. A friend who is good with his hands and tool and die stuff is going to help me out and hollow out an "igloo entrance" shape into the side of the metal case so that the battery cable can stick safely out of the side; I'll be able to connect to the PP2 with the bottom of the case screwed back onto the pedal, and my stomping won't cut into the battery wires or instrument patch cable. I totally dig the job MXR did with going RETRO and the Script Phase 90 really helps to nail the VH1 guitar solo tone but come on guys, it's 2015, ALL pedals should come with a 9 volt power adapter jack.

Read More
May 6, 2015

better than the plain phase 90

By Sweetwater Customer

I've owned the regular phase 90 maybe 2 or 3 times in the past, had no clue this pedal was any better. Boy was I wrong! This little box of goodness blew me away the second I plugged it in. If you're looking for a phaser, stop. This is the one to get. Thanks Tyler Berggren for recommending this over the regular phase 90.

March 25, 2015

Breath

By Greg from United States

Great phase pedal! Killer tone warm and lush. Vintage logo is cool. Sweetwater is great. Luke your the man.

March 24, 2015

Nice Pedal

By Sweetwater Customer
Music Background: Country

Can't go wrong with this pedal has a nice mellow phase. Great for Waylon. Solid and durable pedal.

January 21, 2015

MXR Script Phase 90

By Sweetwater Customer from United States
Music Background: rock guitar

Great 70's vintage sounds per the original, without paying a royalty to EVH.

August 21, 2014

No Improvement Necessary

By Eric from West-central MN USA
Music Background: Pro musician

It took me some time to pull the trigger on this little unit, one because I don't believe in over-effecting bass guitar besides compression and a subliminal hint of chorus, two because it took forever to decide which make/model to buy. I read a Rob Grange quote where he said that he used a Phase 90 set at 11 o'clock to get the unforgettable bass character on 'Stranglehold' not long ago and the deal was done, being as that was the sound I was looking for. Yeah, the bass and pickup configuration has a lot to do with it, but the 90 (original circuit) hammers it! Beware, they aren't all the same. I bought the $99 version because there were so many complaints about added distortion with the cheaper one. Dunlop has really gone mad with all the "signature" versions of effects. If you're a purist like me, stick with the original!

Read More
August 11, 2014

Phase 90

By Lefty Z. from United States
Music Background: live and recording

This pedal more than meets my needs. I use an Ibanez RG series guitar , run the pedal through the front of a blackstar ht studio 20H. It is positioned after the wah pedal and before the distortion pedal. The main purpose is for certain rhythm riffs and leads. It has a rich and full tonality.

June 9, 2014

Sweet, musical phaser

By Matt from Tacoma, WA
Music Background: Guitarist, songwriter for original rock band.

I've owned a couple of late 70s/early 80s Phase 100's, plus an early 80s Phase 45. I've tried out a standard Phase 90. This one, the custom shop script version, beats them all. While the standard Phase 90 is too extreme and my old Phase 45 was too subtle, this one splits the difference nicely. It's musical and lush and complements your playing without overtaking it. Although it has fewer options than the Phase 100, it has the only ones you need, and it doesn't color your tone while the pedal is off (something the Phase 100 is guilty of). Simple, elegant--a great pedal that emulates the Phase 90 tone from the 70s. I've only owned mine for a few days, so I have no idea how it will hold up. But given that I've only had one MXR pedal ever go bad on me, I'm guessing this thing will last a long time. Special thanks to Sweetwater and Tyler Moore for shipping it so fast (and for free).

Read More
of

Have Questions About the CSP101SL Script Phase 90 Pedal?

Or call us at (800) 222-4700
Questions about the MXR CSP101SL Script Phase 90 Pedal?

Sweetwater's Sales Engineers are regarded as the most experienced and knowledgeable professionals in the music industry, with extensive music backgrounds and intense training on the latest products and technologies. They are available to offer you personalized product advice any time you need it.

Type your question below or call us at (800) 222-4700
Thank You!