Nitewalker PREAMP

Requirements

The Nitewalker Bass Guitar Tube Preamp is most effective when used with certain combinations of Bass Guitar Pick-ups, Strings, and Amplifiers. Changing the supplied 12ax7 tube for a different brand will allow for more experimentation with tone changes, too. Surprisingly, the type of string used will make the biggest difference.

At this time Nitewalkers are exclusively made to work with 110VAC wall outlets. Special orders for 220VAC wall outlet units are available, but it may take some time to complete the order. This product is not yet CE certified for European use. We are working on it!

ENGINEERING RESULTS:

input: 100mVrms 200 Hz scope

 

 

 

 

 

 

 

 

input: 200Hz at 400mVrms High and Low Frquency Channels distortion shown

 

 

 

 

 

 

 

 

 

 

 

input: 200Hz at 400mVrms High and Low Frquency Channels

 

 

 

 

 

 

 

 

 

 

 

input: 400mVrms 200Hz scope

 

 

 

 

 

 

 

 

 

 

input: 600mVrms 200Hz scope

 

 

 

 

 

 

 

 

 

 

Bias on the outputs at steady state

 

 

 

 

 

 

 

 

 

 

distortion 100 Hz Low Freq channel

 

 

 

 

 

 

 

 

 

 

frequency sweep 20hZ to 20kHz at 100mVrms input signal

 

 

 

 

 

 

 

 

 

 

frequency sweep at 550mVrms input signal

 

 

 

 

 

 

 

 

 

 

frequency sweep at 630mVrms input signal

 

 

 

 

 

 

 

 

 

 

frequency sweep normalized to 0db

 

 

 

 

 

 

 

 

 

 

Gain Low Frequency Channel Orange drop vs PIO

 

 

 

 

 

 

 

 

 

 

Harmonic Spectrum 1vrms input signal

 

 

 

 

 

 

 

 

 

 

Harmonic Spectrum 400 mVrms input signal

 

 

 

 

 

 

 

 

 

 

Harmonic Spectrum 600 mVrms input signal

 

 

 

 

 

 

 

 

 

 

Low Frequency Channel with Orange drop transient response test

 

 

 

 

 

 

 

 

 

 

 

Low Frequency Channel with PIO transient response test

 

 

 

 

 

 

 

 

 

 

 

orange drop 50 mVrms freq response test

 

 

 

 

 

 

 

 

 

 

 

orange drop 100mVrms freq response test

 

 

 

 

 

 

 

 

 

 

 

orange drop 400mVrms freq response test

 

 

 

 

 

 

 

 

 

 

 

 

PIO frequency response 50 mVrms

 

 

 

 

 

 

 

 

 

 

 

PIO frequency response 100 mVrms

 

 

 

 

 

 

 

 

 

 

 

PIO frequency response 400 mVrms

 

 

 

 

 

 

 

 

 

 

 

 

hand drawn schematic of 12ax7 signal path hand drawn

 

 

 

 

 

 

 

 

 

 

 

 

 

schematic of 12ax7 signal path

 

 

 

 

 

 

 

 

 

 

 

 

 

scope 100mVrms 200Hz input

 

 

 

 

 

 

 

 

 

 

THD+N 0-500 mVrms input

 

 

 

 

 

 

 

 

 

 

THD+N 1-800 mVrms input

 

 

 

 

 

 

 

 

 

 

 

THD+N 250 mVrms 100Hz with overdrive switch in normal position

 

 

 

 

 

 

 

 

 

 

THD+N 250 mVrms 100Hz with overdrive switch in overdrive position

 

 

 

 

 

 

 

 

 

 

THD+N Low Freq. 100 mVrms input

 

 

 

 

 

 

 

 

 

 

THD+N Low Freq. 400 mVrms input

 

 

 

 

 

 

 

 

 

 

THD+N Low Freq. 600 mVrms input

 

 

 

 

 

 

 

 

 

 

THD+N Low Freq channel

 

 

 

 

 

 

 

 

 

 

transient response: high freq. and low freq. channels compared in production Nitewalker Bass Guitar Tube Preamp

 

 

 

 

 

 

 

 

 

 

 

 

If you would like to read a comprehensive report that has been prepared about these results please click here.

Tom Lees, who authored these audio engineering results, wrote an Article in Issue 7 of Bass Gear Magazine entitled, “A Technical Look at the Nitewalker Bass Guitar Tube Preamp”. Click here to view the article.

 

 

Nitewalker Bass Guitar Tube Preamps

 

 

WARRANTY

Nitewalkerpreamp.com warrants to the original end-user purchaser only that the product will be free of defects in materials and workmanship for a period of 5 years from the date of purchase.

Should there be a material or workmanship defect during the Warranty Period, the end-user purchaser shall contact Newbasstone, Inc. to arrange for the return of the item. The end-user purchaser will be responsible for all efforts and costs incurred in transporting/mailing/shipping/insuring the defective item(s) to and from the manufacturer. A copy of the dated receipt/invoice should be enclosed in the return package.

What This Warranty Does Not Cover

Specifically, this warranty does not cover failures of the product which result from accident, abuse, misuse (including but not limited to connection to incorrect voltages or power points), alterations (by persons other than Newbasstone, Inc.), moisture, corrosive environments, shipping, high voltage surges, or abnormal working conditions (including but not limited to lightning and water damage) after purchase. In no event will Newbasstone, Inc., incur liability or damages to you, or any other person, exceeding the purchase price you paid for the product, regardless of the form of the claim. Failure of the 12AX7 tube is not covered by this warranty.

NOTE: This warranty gives you specific legal rights. You may have other rights which vary from country/state to country/state. Certain limitations in this warranty are not permitted by the jurisdiction of some countries/states, so some limitations may not apply to you.

 

 

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