Throw Away The Soldering Iron!

One of the most common questions we receive is: “what do I need to do a solderless installation?” Over half of our clients install preamp upgrades with no soldering skills! Yet, there are some installation scenarios that require connecting existing wires to wires from the preamp kit. This video shows how a IDC (Insulation Displacement Connector) can be used to splice wires without needing a soldering iron or special skills.

Warranty & Support

We understand that buying products without being able to try them first is scary. Learn how LHZ takes the risk out of the process with a no-nonsense return policy and first-class personal support.

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.

Getting Funky with a CST!!

Bassist Paul McFadden recently upgraded his Spector CST from the stock configuration (EMG X-series P/J pickups and Legacy preamp) to the LHZ preamp with the new MID-03 Midrange control and a set of EMG PJ (CS) pickups. The challenge was that while the stock configuration was great for his traditional rock band, he needed a warmer tone for his funk / groove band.

Preamp Battery Comparison: Alkaline vs. Rechargeable

We often get questions about batteries from clients who are used to passive instruments: In this video we look at how preamp batteries discharge over time to answer these questions, and compare a standard Alkaline battery against a common NiMH rechargeable battery.

Solving Compact Wireless Noise Injection

If you find yourself getting unusual noise from your one-piece wireless transmitter on your guitar or bass, you may have a noise injection issue. Noise injection is most often noticed in ultra-low power preamps when using guitar transmitters that use a 3-conductor TRS plug. There are a few factors that can cause this: Compact one-piece transmitters use the RING and SLEEVE of the plug to recharge their internal batteries when docked. This requires an electronic circuit to monitor the RING…

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.

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…