Wavelength Audio

04/03/2026

I have a couple of pre-production studio grade Cube Tube DI with re-amping circuit. These have a wopping 8.75vrms (25.2Vpp) input before clipping. The single 12B4A drives a custom CineMag output transformer. If you have questions go to the website and send me an email! Thanks Gordon

03/13/2026

Update, should have a pair of these Gemini Twin v #3 done soon. Crazy amount of work went into these to make them perfect. I am also waiting on the last pieces for the Titan 910 amplifiers. This is a one of a kind amp that I am really excited about. But today I finishing up building 3 of the Tube DI units. These will be available DIY in the future. In/Thru, Out TS, XLR, Variable PAD and RE-amp XLR. Single 12B4A tube drives the custom CineMag output with 20Vpp input!!! Anyway here's the Gemini from top down.

12/31/2025

Happy New Year All!
Currently working on finishing a couple of Tube DIs. Also thinking about bringing back the Gemini Twin 45/2A3. Also a new 300B amplifier is in the works. I know finish the phono stage and preamp :)

12/17/2025

Happy Holidays All! I am busy working on a product for another company. But I got a call from Echo Audio today about the Twin amplifier. I made only 2 pairs of this 300B parallel output with a pair of 300Bs, 6072A input tube, 6SN7 driver and 378 rectifier. This pair was made 11/1994 for CES 1995. When I was doing CES shows (16 so far) this time of year was crazy. You usually had to ship everything by the end of the month of DEC and not early because of shipping anything before xmas was well unlucky. Here they are if your interested in the build.

The Wavelength Audio Twin V1.4 mono amplifiers are single-ended triode designs built for pure, natural, and harmonically rich tube performance. Using directly heated triodes with no feedback and premium output transformers, they deliver exceptional midrange realism, dimensionality, and musical flow....

11/21/2025

Hey everyone it's my BD today and I figured I better update what I have been doing. So I should have a Tube DI called the Cube DI because of it's shape and a pedal sized SS DI called the Direct Injection NGEN. But I found 2 sets of mono block chassis here at the office in the basement. Don't even remember making this size but they are mind condition so.... what to make. I will have 2 only Fully MagneQuest Iron, custom Silver Parallel feed amplifiers to sell soon. 6.5x12x3+Tube height. What tubes should I make in it?

10/03/2025

Hey everyone, sorry been working hard on a few things. Should have a limited run of the 24 Guitar Amplifier done and ready. I found 5 solid copper chassis hidden in my basement at home and brought them over to the office, protos of a new Phono Stage in the works with NOS Peerless 15095 MC step up transformers for each one. I know that will make a certain person happy :) Was at Mirac today, they are my Contract Company that does my large order builds for Wavelength and what I design for AudioQuest here in the east side of Cincinnati. They have shipped Made in USA 1.1M products to AQ! Doing my part to build in the USA.... now drop the freaken tarrifs. Spent $700 on an order the other day $162 in tariffs!!! not happy.

06/06/2025

First proto of a new guitar amplifier World Wide Amp. 18W Push Pull Magnetically Phase Coupled (MPC) 6V6, all tube 6072A, 6C4WA but a new high end switching power supply, 10lbs just what you need to carry in to a gig.

05/16/2025

One of my first guitar amps. The Rob Fetters signature. I was told at NAMM in 2010 that I could patent the idea. Single 6550/KT88 running Class A/A2 to 25W using my direct coupled reactor follower design. Rob is playing a reunion show with the Raisins tomorrow night on the rooftop in Cincinnati with Bad Bob, Bam and RIcky. Picture my Ric Probst.

04/04/2025

LunchBox DC12, 12W 6AQ7 Magnetic Phase Couple Push Pull amplifier. I had to make some room so no headphone on this one, but it does have the Direct Interface (DI) option.

03/17/2025

Been playing around with some of these AC to DC switching power supplies. This one has a filament supply that comes on first and is very low noise. Then the HV is ramped up about the same speed as a 5AR4/GZ34 rectifier (about a minute). First up is a 12W 6AQ5 (smaller version of a 6V6) PP amp using a center tapped inductor as a phase splitter. A single 12DW7 (1/2 12AU7 driving the phase splitter, 1/2 12AX7 providing the input gain). This amp is killer super low noise. Also about six pounds lighter!

02/03/2025

CES Triton New Century Edition in for a bit of a fix up 21 years later. Made like 60 pairs of these from 2000-2005. Massive 7Hz-38KHz at 14W output. Pushing the 300B to it's max at 36W idling (300B max is 40W). 6C45PI driving and 5AR4/GZ34 serving up the power.