Need a preamp, crossover or power supply?  We have created quite the assortment of modules to help you with your next project.  Our ready made modules provide the building blocks for your ideas.  Of course all of them possess the high quality components and designs you have grown to expect from Welborne Labs. More are planned for 2007.     

Finally, a remote controlled stepped attenuator kit that doesn’t use noisy motors or dozens of expensive relays. The Welborne Labs stepped attenuator modules are compact by design, affordable and modular.... what more could you ask for? Check out these features:

We are now offering a tube output stage kit that can be installed in many of today's popular CD Players and D/A Converters.  It features a very versatile design for both single-ended and differential output DAC chips plus an outboard power supply.  We'll even show you how to install the tube stage in your specific player.

The Mercedes Benz
of
ST70 Mods

Our ST70 mod kit returns bigger and better than ever.

A straight forward two-way crossover with a passive high-pass section and active low-pass circuitry.  Perfect for monitor/subwoofer systems and horns!

The MiniAmp
Class-A Linestage

An all discrete class-A operational amplifier.  This sweet little design can be easily configured for high gain or unity gain, single-ended or balanced, low signal level or drive a set of headphones. And that's not all!  Read on...

CATO
Tube Linestage 

This SE tube/mosfet line amplifier, designed by Erno Borbely, is now available from Welborne Labs. Its all class-A operation makes for a very sweet sounding amplifier and its low impedance mosfet output stage is good for all the bass slam you could ask for!

LOW VOLTAGE POWER SUPPLY MODULES

Squeezebox
Power Supply Upgrade Kit
NEW VERSION

We've received many requests for a complete power supply upgrade kit for the Slim Devices Squeezebox digital music streamer so here it is.

Sonic Impact Amplifier
Power Supply Upgrade Kit
NEW

Several of you have purchased our Squeezebox power supply to use with your Sonic Impact amp.  Now we've tailored this supply just for the amplifier which features a nice high current transformer.

PS6 DC Filament Supply
5 and 6 volts

Our new PS6 is a high quality low voltage DC filament supply. Use it to convert those AC filaments to DC for lower noise..

PSREG Low Voltage
Regulated Supply

The PSREG is a high quality low voltage regulated power supply. It is recommended for use with solid state preamplifiers, active crossovers, filters, CD players, and other circuits with low-to-medium current requirements.

PSREGHC Low Voltage
High Current Regulated Supply

The PSREGHC is a high current version of the PSREG above. It's intended for vacuum tube filament supplies and other current hungry gadgets like turntable motors, SQUEEZEBOX Mods, etc.

PS1 Power Supply
+/- Low Voltage Regulated Supply

The PS-1 is a high quality low voltage dual regulated power supply recommended for use with solid state preamplifiers, active crossovers, filters, CD players, and other circuits with low-to-medium current requirements. The PS-1’s voltage can be fixed from +/- 5 volts to +/- 24 volt.

PS5A Power Supply
+/- Low Voltage Power Supply

The PS-5A kit is a high quality dual-mono unregulated power supply intended for use with low voltage solid state circuits.  We've used it our Active Crossover kit, Hybrid linestage and MiniAmp. The PS5A supplies two channels (dual-mono) +/-28V @ 1A.

HIGH VOLTAGE POWER SUPPLY MODULES

PS3 High Voltage Regulator

Our new PS-3 regulator board is versatile in that it can be used for both vacuum tube power amps and preamplifiers. The PS-3 regulator board is a low cost solid state voltage regulator circuit that provides very good load and line regulation resulting in a ripple output that is extremely low.

PS8 Power Supply
High Voltage w/Regulated Filament

The PS-8 is a combination unregulated high voltage and low voltage regulated filament power supply for vacuum tube preamps. It's available with a laminated or toroid power transformer and a circuit board providing a rectified and filtered high voltage of 280 to 350Vdc and filament voltages of 6 or 12Vdc.

PS10 High Voltage Regulated
Power Supply
(no electrolytic capacitors)

A close cousin of our very popular PS3 Voltage Regulator kit, the PS10 is the same circuit implemented without the use of electrolytic capacitors.... that's right - NO ELECTROLYTICS!  The PS10 also includes a solid state rectification front end making this a complete high voltage power supply.

All designs described and documented on this website are provided solely for your personal use and may not be used in finished products or resold in any form whatsoever without the written permission of Welborne Labs.

Welborne Labs reserves the right to periodically make changes and/or enhancements to all products on this website.

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