Geshelli Labs Z-Blok Mono Amplifier; each

The Z-Blok is a fully balanced monoblock amplifier from Geshelli Labs that brings clean, confident power in a handcrafted chassis made right in Florida. Designed and assembled entirely in-house by the Geshelli family, the Z-Blok delivers Class A/B performance with 230 watts into 8 ohms and up to 250 into 4. With its toroidal-based power supply, 40,000uF of total capacitance, and a solid DMOS push-pull topology, this amp is far more than a pretty face—though the handmade wood cabinet, blind dovetail joinery, and precision aluminum faceplates certainly don’t hurt. It’s powerful, musical, and distinctively personal, just like everything Geshelli makes.

Key Features of the Geshelli Labs Z-Blok

• Fully balanced monoblock design: Clean, stable power delivery with low distortion
• Up to 280 watts peak output: Plenty of drive for full-range or demanding speakers
• Handcrafted wood chassis: Available in Walnut or Curly Maple with real dovetail joints
• High-capacitance power rails: 40,000uF total for improved dynamic response
• Custom-built in Florida: Assembled, finished, and tested entirely in-house by the Geshelli family
• Legacy-inspired name: Honors Geno’s mentor Mike Zaffuto, the engineer who helped shape this dream

Balanced Power and Personal Storytelling

Inside the Z-Blok’s solid chassis is a Class A/B DMOS push-pull amplifier section with enough power to comfortably handle open baffle, sealed, or full-range speakers. The toroidal transformer and 40,000uF of rail capacitance give it the headroom to stay composed during dynamic passages without flinching. This amp is built to make real-world speakers sing. No nonsense, no boutique fluff.

Handbuilt, Inside and Out

Every Z-Blok passes through the hands of the Geshelli family. The chassis is crafted from real Walnut or Curly Maple, precision cut and joined with blind dovetails. Each faceplate is laser-etched aluminum, available in silver or black. What starts as raw material in a Florida shop ends as a finely finished piece of audio gear. One that looks and feels as honest as it sounds.

A Tribute with Power

Like many Geshelli products, the Z-Blok name is a tribute. This one honors Mike Zaffuto, a mentor who helped shape Geno’s path in electronics and engineering. The story behind the Z-Blok isn’t just a footnote, it’s part of what gives this amp its identity. It was made to honor a dream, and that shows in the execution. The Z-Blok isn’t about chasing specs. It’s about building something that means something—and sharing that with others.

The Listening Room Difference

We're a third-generation, family-owned shop, and we believe your system should be as personal as the music you love. When you order from us, you’re dealing directly with Mike—the guy who tunes, delivers, and installs gear for customers across the East Coast. We stock what we sell, answer our phones, and go out of our way to make sure you get a system that fits your space and brings you joy.

Specifications