MM Harp-Verb Docs

The MM Harp-Verb Pedal is specifically designed for blues harmonica, giving a fat reverb sound to your tone.  This pedal is true bypass when switched off.   


There are two ¼ inch phone jacks in the pedal, one marked MIC for microphone and one marked AMP for amplifier.  You will need two regular instrument cables.  

To power the pedal use only a regulated 9 volt DC adapter with center negative polarity.  The pedal does not have provision for a battery, for these reasons:   

-Batteries are expensive.  A good 9V battery costs about $3.50, and most players install a fresh battery for every gig.     

-Batteries can be noisy and the quality of sound can be affected as the battery loses power.   

-It is a hassle to open the pedal up every time to install a new battery.  And a common problem with pedals is pulling the wires loose when you tug on that funky snap connector.  That is so 1980's.   

-Spent batteries are a toxic threat to the environment when thrown away.   

Be sure to carry an extra extension cord in your gig bag.  We know it can sometimes be a hassle to find an electrical plug to power your pedals, and for those situations we recommend the VOLTO power supply from PedalTrain.  It is a lithium rechargeable power source for stomp box pedals, about the size of a mobile phone.  It will easily drive your pedals for an entire gig with clean noise-free power.  The price is $99, and it will quickly pay for itself since you won't be shelling out all the money for batteries.  More info here:   


The MM Harp-Verb Pedal has three controls:  Two knobs controls the Blend and Reverb level of the effect, and a large sturdy foot-switch button turns the pedal on and off.  

I like to start with both knobs at 9 o'clock (pointed to the left).  Experiment with the full range of each Blend and Reverb pedals.  The variety of hall effects is almost limitless.

Some players use the Harp-Verb pedal to punch up their solos.  Others leave the pedal on all the time, usually at a low level.      


The MM Harp-Verb  Pedal is warranted for one year to be free from defects in materials and workmanship.  This is a limited warranty that is void in the case of abuse or modification.  If you have an issue with the pedal, contacts us at   

There are no user serviceable parts in this pedal.  DO NOT open the pedal.  Doing so will void your warranty.

EASY RETURN POLICY:  You may return the pedal within 15 days if you are not satisfied with it.  The item must be in perfect original condition and packed in the original boxes.  Upon receipt and inspection of the returned item we will refund the purchase price.  Sorry, we cannot refund shipping charges.

DO NOT return the pedal without contacting us first and receiving an RMA.   The pedal must be in perfect original condition in the original box. 


-Rick Davis   
Memphis Blues Amps   
P.O. Box 6052   
Sheridan, WY  82801