LHZ-04 Install Manual
View and Download the LHZ-04 Installation Manual right here!
This is a living document that is constantly being updated as we create new installation diagrams for clients that have unique wiring challenges.
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MID-03 Midrange Control Owner Manual
View and Download the MID-03 Midrange Control Owner Manual right here!
The MID-03 plugs in between the output of your LHZ preamp and the output jack to give you the perfect midrange adjustment without impacting the clarity and articulation of the LHZ preamp.
LBCA-02 Active Blend Owners Guide
The LBCA-02 is an Active Balance Control that works well with both the classic and X-series pickups from EMG™ as well as pickups from most other manufacturers.
For more information about the LBCA-02, download the Owner’s Guide here.
HL-1 HAZard LAMPS Manual
The HL-1 HAZard LAMPS pedal gives passive basses the same punch and power as a USA Spector bass with an internal Hazlabs preamp.
While it is so simple that it really doesn’t need a manual, we made one anyway!
TonePump vs LHZ Preamp Comparison
This is an in-depth technical analysis and audio comparison of the TonePump preamp and the LHZ Preamp intended to provide objective data to help players understand the differences in tone and feel that they experience when switching between these two preamps.
Wireless Transmitter Noise Remediation
SYMPTOMS: You are experiencing unusual noise when a wireless transmitter is used. The noise can be anything from static, hiss, high-frequency whine, pops, clicks, dropouts, or audio fading in and out.
CAUSE: Wireless transmitters that use a 3-conductor TRS plug can cause noise issues.
Legacy vs LHZ Preamps
We’ve had several users report that the new Legacy preamp is somehow slightly darker sounding than the Hazlabs on their NS2, and ask if the LHZ preamp would resolve that. One client shipped us their Legacy preamp so we could conduct testing to compare the Legacy to the LHZ.
SaimoN: Pantera – 5 Minutes Alone (Bass Cover)
SaimoN throws down an blistering bass cover of Pantera’s “5 Minutes Alone” that showcases everything that makes the Spector tone such a hallmark of progressive and hard rock genres.
In this video SaimonN is rocking a Spector Euro LX loaded with the LHZ-04 preamp. The full gear list used in this video can be found in the video description.
Ioannis Sandalis : Ghost in the Ruins bass playthrough
Ioannis Sandalis posted this great video playthrough of “Ghost in the Ruins” by Savatage. We love this for a few reasons: Ioannis was inspired to swap out the electronics in his Rebop with an LHZ preamp as he was aiming to get that tone from the Savatage albums that were all recorded on a Brooklyn-era Spector. There’s a tone of tasty detail and articulation on the upper strings, so get the headphones out and enjoy!
Matt Baldwin LHZ-04 Review
Matt Baldwin is an independent recording artist at Mind’s Eye Recording Studios and bassist for the blues-rock band Teskey. He purchased the LHZ-04 to upgrade the stock preamp in his custom Spector and took it into the studio to record tracks for Teskey’s 2025 album “White Wolf.” Matt completely surprised us by recording a video review of the LHZ-04 preamp, which we are proud to share here! This video had us grinning ear-to-ear about halfway through when we got to…