"Hello, David Here! Welcome to our website!" ~D

Over 20 years of Specializing in Repair & Refurbishing Rockmodules


Temporarily Closed.

But, I will (hopefully) be open before March 2019

I will try to monitor emails.


Who are we?
The name of this business is Rockman-Repair.com
Who is the owner?
David SG Ferringer.
What do we do?

We Refurbish Rockmodules with our Stage 2 Refurbishment procedure.

Over the years, David has seen many issues with these units and he has developed many techniques to restore them back to the way they were designed to sound....great! He calls this procedure a Stage 2 Refurb.
Among other steps, a Stage 2 Refurb consists of:
A pre-work Operations Check.
Replacing of
ALL Electrolytic Capacitors "I use quality, name brand caps....of course." ~D
Addressing all Grounding Issues.
Cleaning of all Sliders and Switches with a multi-chemical, multi-step process.
Resoldering of key Solder Joints.
Multi-Point Inspection.
"About 1 in 25 units have a Manufacturer Defect!" ~D
A Post-Work Operations Check.

A "Critical Ear" Sound Check. "This is the fun part but, this is the time when the very subtle issues can be found." ~D
Minor repairs are covered with a Stage 2.
Major repairs extra.

And to top it off, David also backs his work by a limited one year warranty.



Stage 2 Refurb Sustainor (Sus) 100 & 200

The Refurb includes the above description plus, replacing the input jack wire with a high quality silver plated shielded coaxial wire. We can locate the Input Jack in the front or the rear. If no request is made, we will keep it where it was

Option for all Modules: New Jack Nuts (NJN) 

We Replace all the rusty jack nuts with new nickel plated nuts & metal washers.


Sus 200 Option: Double IC Mod (DIC) 

This is the SR&D Lead Level Update for the Sus 200 that speeds up the compressor release time. The result is subtle, but it helps keep fast notes from "blurring."



        Available Now

Sus Option: Semi-Crunch Mod (SCM)

"Do you find yourself not using the Semi-Clean much? Is it because you are not inspired by the sparse harmonics? This Mod kicks it up a couple notches." ~D

Sound Clips Coming.

        Available Now 

Sus Option: Vari-Crunch Mod (VCM) 

This Mod gives you the ability to dial in your own amount of harmonics to the Semi-Clean Feature. The knob can be added to the front or rear.



Sus Option: Double Jack Mod. (DJM) 

By adding a second input Jack, you always have the option of plugging into the front or rear.

High quality silver plated wire used.

"You also can leave the plug in the rear and override it by plugging into the front." ~D


Stage 2 Refurb Distortion Generator (DG) 

Includes SR&D "Lead Leveler" Update when applicable.

Option for all Modules: New Jack Nuts (NJN) 


DG Option: FX Loop  (FXLM)   (Refurb Extra)

This mod adds a Send and a Return Jack to the back of the unit. Dave adds two factory type Rockman Jacks with high quality silver plated wire. For all DG Models.

"Many of us love the DG for its rich, thick tone. The FX Loop Mod takes it to the next level! It allows you to place an Equalizer in the "sweet spot," which is after the compression stage and before the distortion circuit. Highly recommended for tone tweakers!!!" ~D


DG Option: Vari-Gain Mod (VGM)  (Refurb Extra)

This mod adds a Variable Gain Knob to the back of the unit. The Stock DG only has 3 setting for the Distortion Harmonics. This gives you the ability to adjust the amount of distortion from wide open to almost crystal clean and anywhere in between. You may be quite surprised how well the DG can make Semi-Crunch tones with this mod. This can be installed along with the FX Loop Mod however, the SN Sticker will be relocated.

"This mod is pure fun to play with. It is a blast to be able to Tame the Dragon!!!" ~D


Stage 2 Refurb Stereo Chorus (SC) 

Includes SR&D Input Level Update - when applicable.

Option for all Modules: New Jack Nuts (NJN) 


Stage 2 Refurb Smart Gate (SG) 

Option for all Modules: New Jack Nuts (NJN) 

Stage 2 Refurb Chorus / Delay (C/D) 
Option for all Modules: New Jack Nuts (NJN) 
C/D Option: Time Warp Mod $200 (Refurb Extra)
This Mod slows down the delay time considerably. This Mod disables the Short Delay button.
"This mod is one I developed for my own use a long time ago. It  converts the unit from a reverbish delay into (nearly) a  virtual Stereo Echo.  ~D

Stage 2 Refurb Stereo Echo (SE) 
Includes SR&D Output Impedance Update when applicable.

Option for all Modules: New Jack Nuts (NJN) 


Stage 2 Refurb Guitar Compressor (GC) 

Option for all Modules: New Jack Nuts (NJN) 



Stage 2 Refurb Equalizer (EQ) 

Option for all Modules: New Jack Nuts (NJN)



Stage 2 Refurb Midi Octopus (MO) 

Option for all Modules: New Jack Nuts (NJN) 

"Since these units aren’t passing audio, many folks choose to ignore refurbing these until they fail. But, some failures are repairable, some are not”. ~D



Midi Octopus Option (BB) Refurb Extra)

This mod replaces the Grey "A" - "H" Buttons to Blue!

Necessary? ...no. Cool? ...yea.



Stage 2 Refurb Acoustic Guitar Pedal (AGP)
Stage 2 Refurb Ultimatum Distortion Generator (UDG) 
Stage 2 Refurb Wah Pedal (WAH) 
Stage 2 Refurb Volume Pedal (VOL) 





 "Yup, this is me in a silly Rock Music Video. Recorded with a Rockman Sustainor" ~D







Rockman Rack Tray Screws

The Same Taper, Same Length and Same Color as the original SR&D supplied ones

 75¢ each



VERY Limited Supply

Rockman Square Switch Button


$5.00 each

NOTE: Pushing the new button on can destroy the switch.



Rockman Square Switch Button


$3.00 each

NOTE: Pushing the new button on can destroy the switch.



Rockman Power Switch Cap


$3.50 each


Rockman Battery Door for Bass, Model II, Soloist, Ultra, X100

New Production - 3D printed. (loosen back screws, dont pry)

$25.00 each




::: Stomp Pedal Services :::

We also refurbish certain stomp pedals.
We also can install your Mod Kit.

Pricing depends on the specific pedal.
Repairs are possible for some units but not possible for units with surface mount components.

"Like many fellow guitarists, I have a soft spot for Pedals. My very first pedal was a Washburn SCX:7 Chorus.
It was too noisy to use and I traded it to a bud. 20 years later, I got it back! I recapped it and changed the Omp Amp to a better quality one. It is no surprise the unit has a much lower noise level. This is typical with many pedals. Many have a good design and low quality parts. In turn, many websites have devoted much time in developing various improvements and mods.
I have installed kits from several sources and in short, I am impressed and see no reason to develop my own. If you find a kit and need it installed, I am happy to help." ~D

We don't offer Pedal Mod Kits but we can install Mod Kits purchased elsewhere.





Until further notice, service is not available for the following units:


MIDI Pedal <<<Service Returning Soon

Rockman 500 Amp

All Headphone Amps:
Bass Ace

Metal Ace
Guitar Ace







<< Rockman Manuals - Click Here >>
Much thanks to Jark for putting together the Manual Site.
His hard work is appreciated by many!



::: Digitech MEQ Services :::

"Of all the EQs out there, the Digitech Mono 28 is my personal favorite. As with anything I put in my rig, I give it my "once over". And just like the Rockman line, there are issues that need addressed. So, I have developed a procedure that restores them to as good as possible. I now offer this to the public. ~D


Digitech MEQ Stage 2 Refurb 

Applies to all 3 Digitech Models:
Digitech Dual 14
Digitech Mono 28
Digitech Quad 4
Consists of:
A pre-work Operations Check.
Replacing of all Electrolytic Capacitors.
Selector Replacement. This updated selector is less prone to physical damage.
Memory Battery Conversion to 3 AAAs
Resoldering of key Solder Joints.
Multi-Point Inspection.
Ruggedization. "Road-Worthy" anti-vibration techniques.
A post-work Operations Check

Note: Minor repairs are covered. Major repairs extra.



David -
 "Let me take a moment to thank you for being such a HUGE help in the ZZ Top world. You have really made our lives here so much easier just knowing we have you in our back pocket on such a major part of Billy's live sound."

Thanks for your time,
 - Elwood Francis of ZZ Top



Billy Gibbons and David SG Ferringer 

(I service ZZ Top's MEQs & currently, they are not running Rockman gear ~D)



Ok, Ready to restore your sound? What's the next step?
Please review all 15 lines:

Email us for shipping address.

2. Include in your email:
Your PayPal email address. (This saves time asking)

3. Include a list of any issues you are having and/or, any Mods or Options you would like.

4. PLEASE PAD WELL. If the module is not snugly packed, it can be damaged.

5. It is a good idea to hand-write your name on the shipping box.

6. We hand-receive most boxes or, they are put in out oversized mailbox. We retrieve them very shortly after delivery. So, "Signature Required" is not needed but, optional. If you need a "Signature Required" for return shipping, indicate that on the list. (see #3)

7. We recommend USPS as, they are about 2 days faster and many times than not, less expensive. You can send by any means you wish, but it will be returned USPS. USPS provides free boxes.

Send us the Tracking Number. We are VERY busy and we need to know what is coming in and when.

9. Unless you are selling them to us, do not send Racktrays.

10. Occasionally, we will encounter unexpected issues that are not covered under the cost of the Stage 2 Refurb. If so, we will  get your approval before proceeding.

11. After the work is completed, we will send a PayPal invoice.

12. No Paypal? After the work is completed, we can give a total for a Post Office Money Order. Sorry, No Checks.

13. If sending internationally, double boxing is mandatory. From Canada? it
is optional, eh.

14. If you are getting the option of New Jack Nuts & Washers, we can return the old ones by request.

15. Please monitor your emails often. We are sometimes waiting days & days & days & days for a response. This holds up the queue and adds turnaround time to the folks behind you.

Thank You for your cooperation!!!


 Got all that? :) Contact us:

 >>>>> NOTE: I am out of town and temporarily closed. <<<<<

We do not sell any internal parts. Thank you in advance for not asking. Partial repairs are impossible, proper Refurbishing is mandatory. If a unit is sent with previous work done elsewhere, it may not be possible for us to service and/or provide a warranty. All work carries a one year limited warranty. Warranty is void if our seals are tampered with. We do not offer counseling service for self-repairs. We wish we had schematics available. If you have one of the Blue Rockman Schematic Books, please contacts us. David gives his time freely to dutifully to promptly answer emails. Please do your part by carefully reading his responses. If your question is not answered within 24 hours, resend. David will assist in any way possible that doesn't cross the line of proprietary information. Improper questions will be ignored. Emails are the only means of communication. Phone conversations are not possible. David can have many conversations simultaneously and emails are necessary for back reference.


Do you, or did you service equipment from the members of Boston?
Yes. I have serviced Rockmans for David Victor, Kimberly Dahme, and for Tommy DeCarlo's band. As well as a couple Boston Tribute Bands. ~D

Do you play guitar?
Well, I play WITH it...lol! I do mess around with song writing. There is a link below (the cassette)~D

What guitar do you play?
Carvin has treated us southpaw players as equals and not circus freaks. I started playing a Carvin in 1988 and I still play Kiesel's today. (Carvin's original name was Kiesel & they have reverted) ~D

Is this your only vocation?
Well, I just accepted a position with a start-up company but, I will have some time for Rockmans. ~D

I heard its B.S. to change Capacitors. What do you think?
Listening to someone's opinion is just a guide. (even MINE!) I never take ANYTHING as a "hard fact" and it is quite foolish to do so. Caps are not an "absolute" in terms of condition. So, an exact time limit cannot be determined. Some 30 year old caps test fine...some do not. And that is where the confusion or controversy slips in. It is plausible, I have handled more Rockmodules than anyone else to date, unsubstantiated of course. In my 20 years of experience and private testing, I have not seen evidence that keeping the original caps is beneficial. In fact, my testing is showing the opposite. Capacitor manufacturer's document the service life of about 10 years. Since Rockmans are now about 30 years old, I have taken the position of agreeing with the manufacture's data. So yes, it is B.S. to change caps. (B.S. = Best Safeguard) ~D

Are you the David from PSSR (Perfect Sound Rock Refurbs)?
No, that was David Accomando, I am David SG Ferringer. He is now retired. ~D

What does the SG stand for in your name?
SG = Southpaw Guitar...haha no. My Full name is David Stanley Glen Ferringer. I have two middle names, which is good to have a spare if one breaks down on stage.
:P  ~D

Are the Rockmodules shown on the site for sale?
No, but you are welcome to inquire as, we have units for sale from time to time. ~D

Why do you like Rockmodules so much?
Ah well, the voice of the guitar speaks to me. Through a well set up Rockman, it speaks on a visceral & spiritual level. But, with my guitar fingering vocabulary, the words & sentences are on a sub-Sesame Street level. lol. The ability to record direct removes variables that aggravate my obsessive perfection issues. Its mid-focused frequency sits nicely in the mix. ect, ect, ect.  ~D
 The Rockman trademark is owned by Jim Dunlop Inc. ::: Rockman-Repair.com is not associated with the Dunlop Company or any other company in any fashion.
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Rev. 72




 David's Original Music DEMOS Page


Recorded with a Rockman of course!