harp delay pedal



To my knowledge this is the first delay designed for harp offered to the public. It is not a tone-sucking modded guitar delay, but a tone-enhancing harp delay. The dry portion of the signal passes through a buffered input and high-value coupling capacitors, assuring maximum bass response. The echo portion passes through 5 low-pass filters to provide maximum warmth. This is a digital delay that has all of the warmth of an analog delay and then some.

The circuit is centered around a chip that has a low noise rating at < -90dBV, low distortion, < 0.5% THD, 44k digital processing, and is capable of up to 300ms delay. The input is FET buffered for high impedance to provide proper loading for your favorite crystal or CM mic. The gain has been reduced to prevent solid state distortion and is balanced to have an overall gain of 1x so that the level is the same when bypassed. The warmth comes from the superior bass response, distortion-free performance, and the filtering, which provides the effect of a distancing echo by reducing the highs more on every repeat. This delay has an even better roll-off in high frequencies than the Boss analog delay. The delay operates off of a 9 volt battery or a 9V DC power supply, and it has reverse polarity protection. The battery is switched OFF when an external power supply is used. The LED is ON when the delay is in, and is OFF when the delay is in bypass. The mic "IN" jack acts as the ON/OFF switch, and the bypass is a true bypass. The Harp Delay is guaranteed to please even the most diehard analog delay fan.

The settings are very basic. For a reverb type effect, set the DELAY at 10:00, REPEATS at 3:00, and BLEND from 10:00 to 4:00. To acheive a slap-back, set the DELAY from 9:00 to 5:00, REPEATS at 7:00, and BLEND from 10:00 to 4:00. To achieve an echo effect, set the DELAY from 8:00 to 5:00, REPEATS from 9:00 to 5:00, and BLEND from 10:00 to 4:00. This will get you started, but ultimately whatever setting you like is the right setting.

The pedal can be powered with a 9V battery or a DC adapter. The DC adapter requirements are a regulated 9V DC with a minimum 100mA output and a 2.1mm x 5.5mm connector with a negative center. The battery is switched OFF when an external power adapter is used, and the "IN" jack acts as the pedal ON/OFF switch. Lone Wolf is now offering power adapters for US and EURO customers.

Because delay pedals are hard on batteries, with an estimated 10 to 12 hours of playing time, it is recommended to purchase the 9V power adapter, which is sold separately.

  1. DELAY control
  2. REPEATS control
  3. BLEND control
  4. Superior bass response
  5. Analog warmth
  6. 9V DC input (barrel with a negative center)
  7. True bypass with LED indicator
  8. High impedance input
  9. Reverse polarity protection
  10. 10-year warranty on parts and labor
  11. If not satisfied, return within 60 days for a refund of the purchase price minus shipping and 4% credit card transaction fee

Ryan Hartt: gives you a rundown on using the Lone Wolf Harp Delay, the image shows the first delay I ever built.

Brad Capper: demonstrates the Harp Delay

Thomas AKA "Harpsucker": compares some of the more popular delay pedals


More Johnny Mastro and Mama's Boys

Thomas Schied at the Blues Alive Festival Sumperk CZ and Harp Delay

Check out Dennis Gruenling playing the HarpGear 2 and Harp Delay

Check out James Rossen playing chromatic and Harp Delay

SOUND SAMPLES - The following samples were produced by Ryan Hartt of Ryan Hartt & the Blue Hearts using a Silvertone 1482 and an EV 606. Please take a minute to check out his site and some of his music; he is a master of West Coast Blues and really swings.

This sample is with the delay in bypass, diatonic: Sample 1.
Delay on and all effects turned completely down, diatonic: Sample 2.
Delay set to 4, repeat set to 4 and blend set to 10, chromatic: Sample 3.
Delay set to 5, repeat set to 7 and blend set to 3, diatonic: Sample 4.
Delay set to 7, repeat set to 7 and blend set to 10, diatonic: Sample 5.
Delay set to 10, repeat set to 10 and blend set to 5, chromatic: Sample 6.
Delay set to 10, repeat set to 10 and blend set to 8, diatonic: Sample 7.
Delay set to 10, repeat set to 10 and blend set to 8, chromatic: Sample 8.




Ryan Hartt of Ryan Hartt & the Blue Hearts writes:
"I think this is a fantastic product! Don't go looking for the sound of your Boss DD-3 or your Dan Echo. This pedal is built from the ground up specifically for harp with its own sound. It's the sound you were looking for when you bought those other pedals and couldn't get because they were made for guitar. From tone fattening slap back, to long Little Walter slow blues delays, to funky phaser/Leslie like doubling the Lone Wolf Harp Delay does it to death! I can't decide if I'm going to use my Boss DD-3 as a paperweight or a door stop."

Ian Collard of Collard Greens and Gravy writes:
"Hi Randy, the pedal arrived Friday and I gigged with it yesterday and loved it, huge improvement on my Maxon AD90, much warmer."

Johnny Mastro writes:
"I just wanted to say hey and let you know how much I love the harp delay. Been using it steadily for over 4 years or so and hundreds of gigs and still going strong. There is no comparison and I threw all other delays away."

Another review reads:
Here's what's cool: I rebuilt a 62' Harmony 305A and added a few components for bigger low end and a Weber 12A100 and now it's actually a pinch brighter with the box, which is just what an old time EchoPlex did to the tone. It still has that big low end with some added bright edge. I will say, though, that this box makes my dynamic mics come alive unlike any delay box I think I've ever heard. It reminded me of my Hohner buddy who has always used a 59 Champ, and a 545 with a Boss DD2, but I do think this was better. The bypass was pretty darn good too! So far? 2 thumbs up!"

Brian Purdy of HarpGear:
I like the pedal enough that I am going to start bringing it out with me on the road to demo with my amps. To me, that is the highest endorsement I can give of a product. I want my amps to sound their best when people demo them. I feel comfortable with how this pedal will make my amps sound when people ask to try the amp with delay. I know it won't take anything away from the amp and it will just enhance an already great tone.
See Brian's review in its entirety at the HarpGear site under NEWS and check out the HarpGear lineup of great harp amps.

Rev. Walter Herleman:
"Thanks Randy. I LOVE this thing! It's replaced an Ibanez AD-9 that I've used for the last 15 years. It's amazing how MUCH better sounding it is than any delay I've used. Before the AD-9 I had tried many different delays, from stomp box's to rack mounts. I thought the AD-9 was great till I played through your Lone Wolf. There's really no comparison. It's just so much better sounding. Switched in, it's got a great fat delay tone. Switched out, it's just much more transparent. Great googlie, mooglie, this is the one!"

Another review reads:
"Randy, Just wanted to let you know how pleased I am with my Harp Delay pedal. What an awesome piece of gear! Talk about fat tone - it does great things for my overall sound. I've been playing harp for 40 years and have played through a lot of mics and amps, but with your pedal and my HarpGear amp I think I've finally found 'my sound'. It arrived on Fri. afternoon just in time to gig with on the weekend and I had a ball trying different settings in two very different rooms. I've just begun to explore all the possibilities and, so far, it's all good. Thanks for producing such a great effect for the harp community."
-Thanks Again, Jeff DeLong

Joe Lee Bush
"I hate pedals and gadgets, but I talked to Mr. Landry over the phone, played some stuff through my rig and he said 'this delay is going to give you more bottom end and I promise you will like it'. I bought one. He was absolutely right. No tone or power loss whatsoever and I use the ac/dc power adaptor he sells too. I have no time to fool around with batteries.The Lone Wolf Harp Delay really adds to the sound. I used it on gigs all weekend in various places (one being the dreaded outdoor 'festival' with a know it all sound man trying to control everything) and I am totally pleased. I am one of those who shamelessly chase the Rod Piazza sound, note for note, and give him credit where its due. This delay gadget has me about as close to it as you can get; I think. I am sure there are many who will challenge most of this, but please remember its my opinion and what I like to hear, as do the crowds I work for."
-Regards, Joe Lee Bush


The following samples were produced by Zack Pomerleau using a Harp Delay, a Harpgear 50, and a SM57. Zack was a participant in the 2010 IBC.
Sample 9   Sample 10   Sample 11   Sample 12  

Johnny Mastro & Mama's Boys: recorded live for Amsterdam Radio Simulcast


info sheet     power plug drawing
If you need an amp, see Brian Purdy at HarpGear.

For questions or comments, email us at