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Luthifer
Feb 201 min read
Preamp Specs, Dimensions, Etc.
If you are looking for technical specs on the various preamp modules, you can find them in the store pages. Go to Parts, and click on the...
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Luthifer
Feb 141 min read
Finally, a Wiring Diagram
I made basic wiring diagrams for one and two pickup installations. Since preamp systems are shipped with all the modules connected, this...
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Luthifer
Feb 121 min read
Two New Buffers
The BA and B5 buffers are now available in limited quantities (more in a week or two). The BA is for active pickups with high output,...
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Luthifer
Jan 311 min read
Two Module Setup
To give you an idea of what a Gen6 install looks like, here's a Paradactyl Uno (EPL and EPH EQ modules) with a coil switch in a small...
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Luthifer
Jan 291 min read
EPL and EPH Modules are Available.
These are the two parametric EQ modules that were combined into the original Paradactyl preamp. Pro tip: Any EQ modules can be used...
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Luthifer
Jan 231 min read
Q Trimmer Settings
Here are some diagrams showing the trimmer positions for various Q levels on the FS Filter (MED and HI switch positions), and FP Filter...
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Luthifer
Jan 181 min read
The Devil is in the Details
We stress out about every part of our product so you don't have to. Take the cables: The wire insulation is irradiated PVC, which is more...
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Luthifer
Jan 151 min read
Terminal Markings
A few users have mentioned that the connection markings on the new boards look like there are two "+" connections. If you look close...
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Luthifer
Jan 41 min read
Noise Shootout
At the heart of the new preamps is a new filter circuit with ultra stable performance, higher resonant boost, and reduced noise. They are...
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Luthifer
Jan 41 min read
New Preamps are Here!
I've been head down for three months working furiously to redesign the Underhill Preamp line. The website will be updated shortly. Key...
62 views0 comments
Luthifer
Nov 15, 20231 min read
New Sound Clip from Manley
This is the PD preamp with dual FV Variable Q filters. Turner multicoil pickups. https://www.facebook.com/mark.manley.188/videos/15493268...
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Luthifer
Oct 23, 20231 min read
A Hint of Things to Come...
I am working on re-packaging the modules into an architecture similar to a pedal board. Some possible benefits are: Swappable buffers,...
37 views0 comments
Luthifer
Sep 28, 20231 min read
Internal Frequency Trimmers for ET5 Bass and Treble - The tiniest board ever!
These can be used for setting the bass and treble frequencies internally with an ET5 Equalizer. Boost/cut is then handled with single...
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Luthifer
Aug 9, 20231 min read
Detaching and Attaching Cables
The miniature cables used on Underhill preamps and filters are quite robust, and can carry a lot of current (Apple uses them for the...
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Luthifer
Aug 4, 20231 min read
Two and Three band parametric EQ modules are Available!
These have new tunings and use less power... Check them out.
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Luthifer
Jul 27, 20231 min read
Internal Bass/Treble Frequency Trimmers for the ET5?
I'm thinking about making a little trimmer board that can be plugged into the bass and treble frequency connectors on the ET5 3 Band EQ....
39 views1 comment
Luthifer
Jul 6, 20231 min read
Underhill is Moving - And ED5
We are moving this weekend, back to Mount Vernon, WA. With all of the mess I have run out of some modules, and won't be fully...
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Luthifer
Jun 26, 20231 min read
Demo Video from Manley!
A tasty preamp demo from Manley is up on YouTube. It's the PD Preamp with FV Variable Q filters and an FT treble boost plugged in. It...
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Luthifer
Mar 21, 20231 min read
Complete Systems are back in the store
This should make it easier for new customers to figure out what they need to order...
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Luthifer
Mar 16, 20231 min read
Preamp Configuration Guide
The new Preamp Guide is the place to start when deciding how to put together your preamp. When you find a configuration that looks right...
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