Diamond Guitar Pedals

Diamond pedal Voltage requirements and Current draw:

Current Draw
Memory Lane 2
18V (24V)
Halo Chorus
18V (24V)
18V (24V)
18V (24V)
J-Drive Mk3
9V (18V)
9V (18V)
Bass Comp
18V (24V)
9V (18V)
9V (18V)
18V (24V)
Memory Lane 1*
18V (24V)
Diamond Drive*
9V (18V)
Diamond Drive SE*
9V (18V)
J-Drive (JDR-1)*
9V (18V)
J-Drive TR*
9V (18V)

* - indicates discontinued products. Number in brackets represents maximum voltage.

Common Maintenance questions:

1. How do I clean my Diamond Pedal?

We recommend using a soft chamois to clean the powdercoated finish of Diamond Pedals. Stubborn stains can often be removed with a bit of isopropyl alcohol and tissue.

2. When I plug into the MIX jack, the echoes seem faint, distorted or aren't there are all, but are fine coming from the DELAY ONLY jack. What do I do?

The Memory Lane DELAY ONLY jack has a mechanical bypass mechanism that passes the delay signal on to the MIX jack when nothing is plugged into the DELAY ONLY jack. If this becomes dirty or jarred from a proper contact, the delays from the MIX jack can become faint or can disappear altogether. These contacts are very simple to clean and can be done in less than 5 minutes - instructions for cleaning are in this newsletter in the 'tech tips' section near the end of the newsletter.

3. Where can I purchase replacement AC adapters for the Memory Lane and Halo Chorus?

For North American use, the AC adapter part number is T455-P5P-ND from http://www.digikey.com.

For international use, the AC adapter part number is T383-P5P-ND from http://www.digikey.com.

4. Where can I purchase replacement machined knobs for the Memory Lane?

These are part number 226-2091-ND from http://www.digikey.com.


Download the DIY schematic for the dynamic Memory Lane feedback expression pedal design:

Download our newsletter:

Oct 2006

Diamond Guitar Pedals Frequently Asked Questions:

1. What options do I have for powering the Memory Lane?

The Memory Lane comes standard with a very compact 24V DC positive tip AC power adapter (see photo below for the North American/Japanese version - it fits into a single power bar space). ** VERY IMPORTANT: Although the Memory Lane power adapter has a standard P5 9.5 mm plug, DO NOT plug this into any effects other than the Memory Lane as you could permanently damage those effects. **  The Memory Lane internally regulates power to 15V, so any supply of at least 18V DC positive tip and a minimum 125 mA current capability can power the Memory Lane. Please note that the Memory Lane 2 requires a minimum of 160mA current for correct operation.

Standard North American Memory Lane AC Adapter

Standard European Memory Lane AC adapter

Using a special dual 9V to 18V polarity crossover adapter that we can provide, the Memory Lane can be powered on outputs 5 and 6 of a Voodoo Labs Pedal Power 2 Plus (or any PP2 made after Nov. 2004 is our understanding). Outputs 5 and 6 can provide up to 200 mA while the other outputs are limited to 100 mA. The polarity crossover cable also works with Burkey power supplies.

Custom 9V to 18V Crossover Adapter for PP2+ (Order Here)

The Dunlop DC brick, Burkey Flatliner Pro and the pedalgear.net Juicebox both have 18V negative tip outputs with sufficient current capability that can power the Memory Lane with a polarity crossover cable.

ML powered by JuiceBox

2. What expression pedal do you recommend for controlling the feedback path on the Memory Lane?

The Moogerfooger expression pedal works well, and so does an Ernie Ball volume pedal connected via a 1/4" stereo to dual 1/4" mono insert cable. Check back soon for more info on taper choices....we'll also be checking out the Foxrox expression pedal.

3. It seems to be fairly easy to get the Memory Lane to oscillate, what's up with that?

We designed the feedback system from the beginning to be easy to put into oscillation. Our goal was for oscillation to be possible at any delay time, and we wanted the player to have control over how quickly oscillation could be started - especially useful for foot pedal control. We wanted players to have the ability to put the unit very quickly into oscillation, but to be able to pull out of it just as quickly, so that the oscillation itself could be worked into the rhythm of a song and become an expressive tool in its own right. That said, if you're not using an expression pedal for feedback, you should begin with the feedback knob somewhere below 12 o'clock and the EQ at mid point as a starting point when dialing in your delay sound.

4. Is the Memory Lane really analog?

Yes, both the dry and effect signal paths in the Memory Lane 1 and Memory Lane 2 are 100% analog using bucket brigade technology. At no point does your guitar signal pass through an analog to digital converter.


5. How does the dotted 8th note feature work?

When a modded Memory Lane 1 or a Memory Lane 2 is in dotted 8th mode, you simply tap quarter notes at the tempo of the song or piece you are playing. The resulting echoes will sound in dotted 8th note rhythm. Note that it is not possible to set the tempo in normal mode and then switch to dotted 8th and have the pedal 'switch' to the new delay time- you have to re-enter the tempo after switching to dotted 8th mode.

6. How big is the Memory Lane?

It may not be the smallest pedal on your pedalboard, but it's not all that big: dimensions are 7.38 x 4.7 x 1.3 inches, which is a standard Hammond 1590DD enclosure.

7. What type of enclosure does the Halo Chorus use?

The Halo Chorus uses a Hammond 1590Q enclosure, which is 4.7 x 4.7 x 1.1 inches in size.

8. How can I get one of your pedals?

Check out our dealer page, we have retailers in the US, Canada, EU, Japan and Australasia who carry the Diamond Pedal line. If you're unable to locate a dealer near you, send us an email at info@diamondpedals.com.

9. What's your warranty?

We have a full five year parts/labor warranty on our pedals. If you ever have a problem, the warranty is really simple - call us, send us the pedal if necessary, and we'll make it right.

10. Why more overdrive pedals? Aren't there enough in this world already?

Although there seems to be a gazillion of them out there right now (and we've added four of our own models to that total!), the Diamond family of overdrives (Drive, Drive SE, J-Drive and J-Drive TR) have been uniquely voiced to sound unlike any other drive we know of. The Warmth circuit is a big contributor to that difference, as well as our choice of audiophile opamp, premium Panasonic P-series polypropylene caps and 1% metal film resistors. That component choice for quality and tolerancing is not only important for consistency between each pedal, but also gives our drive a very harmonically rich and articulate sound. You can quickly hear that difference in articulation in the upper registers - try playing a few notes and intervals on the B and high E strings.

11. What's with the 'Warmth' control on your drives?
Is it just a reversed tone control that gets bassier as you turn it clockwise?

We wanted to do something different with tone control so we replaced the traditional cut/boost control with a simple variable low pass filter. One of the side effects of this very simple filter is the fact that it ADDS gain as you DECREASE the cutoff point. Up to a point this kind of acts like a constant volume circuit - in that as you reduce perceived volume from the high end you're replacing it at the bottom. This perceptually only holds for a fraction of the Warmth control turn, as you then begin to notice the thing just getting louder overall. This isn't a bad thing, depending on how you set the other gain stages in the pedal it can add its own overdriven flavor to the overall mix. Conversely, at its most counterclockwise setting, the filter is essentially flat up into the treble range.

12. What's with the switch on the back of your original (Drive, J-Drive and Drive SE) drives? Why isn't it labeled?

The very first builds of the original Diamond Drive had an internal jumper for selecting the amount of compression the overdrive would provide. After talking to customers about the jumper, we realized it would be much better to bring that function outside so that the player could quickly A/B that setting for their particular guitar/amp setup and playing style. We then added a switch to the back of the box for that purpose. To keep costs in line with the original jumpered Drive, we decided to forego an extra screen printing step on the back.

13. How long do the Compressor and the drives last on batteries?

The Compressor and any of the drives are fairly low current device - you should get 30 or more hours of use on an alkaline. One small anomaly with the Diamond Drive (and SE) is that the single transistor lead boost circuit is actually more sensitive to decaying voltage level than the drive circuit. One of the first indications of a battery going dead with the Drive and Drive SE is the fact that you might lose signal level turning on the lead boost, even though the drive circuit on its own seems to be working just fine. No problem - it's just time to replace the battery. The LED's are not designed to be battery level indicators (other than the fact they only light up if there is at least some juice left) - they were purposely set to operate at low current and voltage so as not to cause unnecessary battery drain.

14. Can I use any 9V adapter for your drive and compressor pedals?

We’ve had great results using a standard Boss PSA-120 adapter – it’s relatively inexpensive and easy to find at most music stores. Although any 9V adapter with negative tip on a P5 plug will power the unit, some adapters we’ve come across are not the greatest at filtering out AC ripple noise.

15. I see that the pedals are manufactured in Lower Sackville, Nova Scotia, Canada. Where the heck is that?

Lower Sackville is a small town that's part of the greater Halifax Regional Municipality (the HRM) - about 20 minutes from downtown Halifax. In fact, on the most recent presidential visit to Canada in 2004, President George W. Bush drove by within about 500 yards of our company site on the way to downtown Halifax. Our core PCB manufacturing is now also done in another part of the HRM, Dartmouth, at Sunsel Systems.

16. Great, so where's Halifax?

Halifax is a very old port city on Canada's eastern seaboard. It's the second largest natural harbour in the world, behind Sydney Australia, with an area population over 300,000. Halifax has had it's share of tribulations over the years, including the largest manmade non-nuclear explosion in 1917 that leveled a significant portion of the city when two ships (one of them a munitions ship) collided in the harbour. Halifax still sends a large Christmas tree to Boston every year to thank Bostonians for their help during this disaster. Also, further back in 1912, about one hundred and fifty Titanic victims were buried in Halifax cemeteries, of which 44 of the victims are still unidentified.

Here are some interesting links about Halifax:

General info: http://www.halifax.ca/
Maps: http://visitors.halifax.ca/whereishrm.php and http://visitors.halifax.ca/maps.shtml
1917 Halifax explosion: http://www.halifax.ca/community/explode.html and http://www.cbc.ca/halifaxexplosion/
Titanic: http://titanic.gov.ns.ca/
Realtime webcam of the highway near our manufacturing site!: http://gov.ns.ca/tran/cameras/camdetails.asp?id=bedford
Here you can see snowstorms in action during our winter months!

17. Who are you guys anyway?

We got this exact question in an email to us! Well, at the core we're a small design team consisting of an electrical engineer and an electronics technologist who all happen to love music and great sounding music gear. Both of us have played guitar for many years and over those years collected all kinds of boutique and mass production pedals. One of us also has a side career as a professional bass player. The founder of Diamond Guitar Pedals, Michael Knappe, has a Masters of Engineering specializing in signal processing, and worked as a signal processing expert for many years at Nortel Networks and Cisco Systems where he developed state of the art audio processing systems for literally millions of installed packet voice (e.g. Voice over IP) systems and devices around the world. Much of his work involved improving audio quality in these systems through innovative connections between signal processing algorithms and psychoacoustics (the study of how our brain perceives sound). He has contributed to 27 US patents in these fields while at Nortel and Cisco. He is also currently working on a PhD in Biomedical Engineering in the area of psychoacoustics.

The goal of our company is to provide 'Innovative Sonic Excellence'. Our mission has been to ask ourselves how we can innovate new features and provide improved sound quality in the field of guitar signal processing. We're not in the business of building exact clones of existing products - there are many great reissues out there already, not to mention a large installed base of the original product. Instead, we want each of our products to stand uniquely on its own while at the same time maintaining familiar product usability.