Skip to main content Skip to footer
Last Chance: 15% off accessories with code: SAVE15
Call our Gear Advisors (877) 509-9963 Hablamos Español
MF MD HG01 Love your Les Paul 06-15-18

Randall RM4 Empty Preamp Chassis without Modules

  • Write a Review
Product 180275
Product Price $0.00
  • Free Shipping With Backstage Pass (48 Contiguous U.S. States)

Get the real sound of your favorite amps, not wimpy simulations. The Randall RM4 preamp rackmount chassis holds up to 4 preamps from 11 different mod...Click To Read More About This Product

We're sorry-this item is unavailable.

Find a similar product below or contact our experts for a recommendation of great alternatives. Call us at 800-449-9128.

Customers Also Viewed:
Don't Forget

Build your dream amp exactly the way YOU want it!

Get the real sound of your favorite amps, not wimpy simulations. The Randall RM4 preamp rackmount chassis holds up to 4 preamps from 11 different modules and then connects to any power amp to build your dream gig rig. The chassis provides a tube-buffered effects loop and parallel effects loop with front-panel mix control. It also includes a series effects loop, front- and rear-panel inputs, pre/post loop outputs, ground lift, MIDI in/thru, and master volume. Though any power amp can be used, the Randall RT2/50 is perfect, offering switchable sets of EL34s and 6L6s for enhanced realism.

Choose from the following modules (sold separately) to build your own custom combination of tones:

Ultra Module

Brown Module

Clean Module

Dual Treadplate Style Module

SL+ Module

Plexi Module

JTM Module

Top Boost Module

Tweed Module

Blackface Module

DLX Module

  • Chassis holds your choice of up to 4 pre-amps from Randall's 11 modules
  • Connects to any power amp to create your dream gig rig
  • Tube-buffered effects loop and parallel effects loop with front-panel mix control
  • Series effects loop
  • Front- and rear-panel inputs
  • Pre/post loop outputs
  • Ground lift
  • MIDI in/thru,
  • Master volume

It's the ultimate rig for the amp collector, studio, or touring pro. Order today.


Review Snapshot

by PowerReviews

(based on 8 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers

Displaying reviews 1-8

Back to top



By Wesman11483

from NE Pennsylvania

See all my reviews

I hear what some of you are saying about price, but think of what you're collect all these boutique tube amps would cost way you have the virtually failsafe switching of MIDI! This is an incredible piece of gear, especially for a worship leader like me where stage volume is a constant worry. I can run direct without sacrificing a bit of tone! GREAT JOB!!!


Very impressed

By Anonymous

from Undisclosed

And I stress VERY. My main worry when I first got this was that many preamps that try to do things like this end up sounding cheesy. Not the RM4, it delivers real tone. I think the RM4 does an outstanding job at capturing the essence of each amp it emulates. Not exact, since a lot depends on the speaker and amp configuration of the original (ie, combo, 2x12, 4x12, etc), but it comes super close. I was blown away when I heard the Black Face module -- it actually does sound like my old black face Princeton Reverb, and the Deluxe module actually sounds like my old silver face Deluxe Reverb. I have a lot of nice amps, but I will seriously be selling most of them in favor of the RM4. I also have the RT2/50 power amp, a great match. I have been playing guitar for 24 years, and have been a gear junkie for a good 12+ years now. I don't give out 10's easily, but the RM4 really hits the mark.

(0 of 1 customers found this review helpful)


Could sell a lot

By yes man

from Austin, TX

See all my reviews

I'm not sure what they're doing with this thing. If they'd just sell the chasis for a reasonable price, they'd sell tons and tons of them (and the modules). And I'd like a two space version that I could just have the class-A and whichever dirty module. The price is ridiculous.


Expensive but well worth it

By MetalVoodooChile

from hermitage, PA

See all my reviews

I use this preamp along with another preamp-effects processor(ART-SGX 2000 Express)and run it out through the clean channel on my Randall Rh200SC-G2. I decided to go with this unit rather than the Randall RM100 head just for the simple fact that I have so many high gain presets in my ART-SGX and I couldn't run them through the dirty channel of that head (over saturation). I found that using two preamps together works a lot better because they talk to one another, plus you can add add a lot more gain and modify your sound without clipping. I'm using the Ultra and Recto modules for this unit and it sounds incredible!! These modules coupled with my ART presets have the highest, tighest, evilest sounding distorion I've ever heard. Silky-smooth distortion with a lot of punch. When you first see this unit, you might not think that you're getting too much for your money, but you'll change your mind when you hear it combined with your effects processor and/or preamp. I give tech support from Randall a 10 because the one guy that I spoke with did everything except come to my house and set this thing up for me. We tried to figure out how to run 2 preamps at the same time (I finally figured it out and it is possible). I wish this unit had more features, like a tube contour button and a built in EQ, but all in all, it's well worth the money.


Audience compliments all night

By Adam-q9-6D

from Greenville, SC

I have owned this unit since it first went on the market, and I have yet to be disappointed. I have used it in the studio to get the warmest and cleanest sounds for electric guitar in my recordings. I have it in it's own 2 space rack for gigs and I never play electric without it. I run it straight to my mixer; no feedbacky mics with amps to get the good sound. I get compliments at every show about my guitar sound..where are your amps? If there are intense AC power spikes, the module changer switch may connect to all at once, but easily fixed by using a power conditioner like every multi-amp rack should for equipment protection. If you play any style, even metal, this is the pre-amp for you. If you can afford it, buy it.


Randall RM4 Pre amp

By JR-8n5ap

from CT

Just purchased the RM4 with the RT2/50 power amp. Very well-built, versatile, and has EXCELLENT tone. The MIDI-switching and interface with a rack effects unit is phenomenal. I highly recommend this unit.


Unbelieveable flexibility

By Tone King

from ST. Louis

See all my reviews

It's amazing!! Each module sounds distinctly different, provide a huge range of tones. The knock off tones, are nearly dead on!


Best amp for the money

By MirageMan

from Chicago

See all my reviews

Granted fully loaded it is a 1,500 dollar Preamp, but the sounds are great. Very good tube tone and very good high gain when wanted. Get basically any sound you want depending on modules you choose.

Displaying reviews 1-8

Back to top

See All Randall Guitar Preamps
You are changing the Ship-To country.

Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.