---
product_id: 87695065
title: "Monolith 133304 Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db"
brand: "monoprice"
price: "€ 256.22"
currency: EUR
in_stock: true
reviews_count: 8
category: "Monoprice"
url: https://www.desertcart.hr/products/87695065-monolith-133304-liquid-spark-headphone-amplifier-by-alex-cavalli-rca
store_origin: HR
region: Croatia
---

# 1.3W output power 108dB SNR for crystal clarity DC coupled topology, zero capacitors Monolith 133304 Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db

**Brand:** monoprice
**Price:** € 256.22
**Availability:** ✅ In Stock

## Summary

> 🎧 Elevate your desktop audio game with Monolith Liquid Spark — where power meets purity.

## Quick Answers

- **What is this?** Monolith 133304 Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db by monoprice
- **How much does it cost?** € 256.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/87695065-monolith-133304-liquid-spark-headphone-amplifier-by-alex-cavalli-rca)

## Best For

- monoprice enthusiasts

## Why This Product

- Trusted monoprice brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Small footprint with high-performance MOSFETs and laser-matched low-noise JFETs.
- • **Power Meets Precision:** Delivers 1.3 watts into 50Ω with ultra-low distortion (THD+N as low as 0.007%).
- • **Pure, Unfiltered Sound:** DC coupled design eliminates capacitors in signal path for pristine audio fidelity.
- • **Versatile Connectivity:** Includes preamp RCA outputs controlled by volume for seamless powered speaker integration.
- • **Confidence in Every Note:** Backed by a 1-year warranty and 30-day money-back guarantee for risk-free listening.

## Overview

The Monolith 133304 Liquid Spark Headphone Amplifier by Alex Cavalli is a compact, high-performance amp featuring a DC coupled topology for uncolored sound, delivering 1.3 watts at 50 ohms with an impressive 108dB signal-to-noise ratio. Designed with precision laser-matched JFETs and MOSFETs, it offers clean amplification and versatile RCA preamp outputs, making it an ideal entry-level desktop solution backed by a 1-year warranty and 30-day return policy.

## Description

The Monolith liquid spark is a compact headphone amplifier developed by Alex Cavalli for Monoprice. It provides everything people have come to expect from a Cavalli design. It uses dual 18 V filtered power supply Rails to produce wide voltage swings for additional headroom. The spark offers plenty of power at 1300MW RMS into 50ohms (per channel), with very low distortion, and switchable gain.

Review: Sound cuts out at certain frequencies - Amp was great, when it worked. Every game I played it would cut off randomly (led would go red) and then it would come back a few seconds later. I assumed maybe the volume was too high, or it did not like my DAC. I switched everything, tried again, same. I was willing to accept that, because music sounded awesome with it... Then it cut out while playing certain songs. I got a replacement, and sure enough, same thing. Overall I had an awful experience with this product, going to have to move on to something else. Update : Went with the JDS Atom and it's night and day. Sound quality is noticably better than the liquid spark, and I have had no cutout issues... And it cost less than the Spark.
Review: Didn't Last Long - I love the sound that comes from this headphone amp. However, I went through two of these and they both eventually failed. The sound eventually became extremely distorted and staticy.

## Features

- Effortless sound: The design of the spark is a DC coupled topology from input to output, meaning it has no capacitors in the signal path to detract from the sound
- Exceptional design: the spark uses laser matched, low noise, audio jfets for its differential input stage and high performance, but very small mosfets for output power leading to super clean Amplification and high power from a small footprint
- Clean preamp output: The spark additionally has preamp output RCAs, controlled by the volume pot, for use with powered speakers. An ideal configuration for an entry level desktop set up which performs well above its price point
- If you want to be where the music wants you to be the liquid spark will effortlessly put you there at a very affordable price. THD+N (both channels)- 1 Vrms (20mW)- 0.007% THD+N @ 1kHz. 5 Vrms (530mW)- 0.035% THD+N @ 1kHz. 10 Vrms (2.12W)- 0.065% THD @ 1kHz
- Buy with confidence: Monoprice not only stands behind every product we sell with a 1 year repair warranty, we offer a 30-day money back guarantee as well

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07JW7NSXT |
| Best Sellers Rank | #65,662 in Electronics ( See Top 100 in Electronics ) #123 in Headphone Amps |
| Brand | Monoprice |
| Brand Name | Monoprice |
| Customer Reviews | 4.3 out of 5 stars 377 Reviews |
| Global Trade Identification Number | 00889028084601 |
| Included Components | Monolith Liquid Spark Headphone Amplifier |
| Item Dimensions | 11.1 x 7.3 x 2.8 inches |
| Item Type Name | Monolith Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108dB |
| Item Weight | 0.01 Ounces |
| Item dimensions L x W x H | 11.1 x 7.3 x 2.8 inches |
| Manufacturer | Monoprice |
| Material Type | Aluminum or ABS plastic |
| Maximum Supply Voltage | 18 Volts (DC) |
| Model | 133304 |
| Mounting Type | Freestanding |
| Number of Channels | 1 |
| Output Power | 1.3 Watts |
| Package Type Name | Retail Box |
| Specification Met | Fcc, Ices-003 |
| Supply Current | 72 Milliamps |
| UPC | 889028084601 |
| Voltage | 18 Volts |
| Warranty Description | 1 |

## Product Details

- **Item dimensions L x W x H:** 11.1 x 7.3 x 2.8 inches
- **Voltage:** 18 Volts
- **Manufacturer:** Monoprice
- **Maximum Supply Voltage:** 18 Volts (DC)
- **Mounting Type:** Freestanding

## Images

![Monolith 133304 Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db - Image 1](https://m.media-amazon.com/images/I/51IvBJfNQSL.jpg)

## Customer Reviews

### ⭐ Sound cuts out at certain frequencies
*by J***E on May 29, 2021*

Amp was great, when it worked. Every game I played it would cut off randomly (led would go red) and then it would come back a few seconds later. I assumed maybe the volume was too high, or it did not like my DAC. I switched everything, tried again, same. I was willing to accept that, because music sounded awesome with it... Then it cut out while playing certain songs. I got a replacement, and sure enough, same thing. Overall I had an awful experience with this product, going to have to move on to something else. Update : Went with the JDS Atom and it's night and day. Sound quality is noticably better than the liquid spark, and I have had no cutout issues... And it cost less than the Spark.

### ⭐ Didn't Last Long
*by D***L on December 21, 2025*

I love the sound that comes from this headphone amp. However, I went through two of these and they both eventually failed. The sound eventually became extremely distorted and staticy.

### ⭐ Center audio stopped randomly on first and replacement unit.
*by H***Y on January 16, 2020*

The first unit that I purchased had some issues at first wit not passing the full sound stage through but just started to work after some time, these issues started again and would not go away so I issued a replacement that did the exact same thing but crapped out even sooner. What is so frustrating is that this amp sounds good when it works. -side note If a product does not work properly it is as good as garbage

## Frequently Bought Together

- Monolith 133304 Liquid Spark Headphone Amplifier - by Alex Cavalli with RCA Input, Single 1/4 Output 1.3Watt@50R, 108Db
- Amazon Basics 3.5mm Stereo Aux to 2 x RCA Audio Cable Adapters, 4 Feet/1.2 m, for Connecting Amplifiers, Speakers, with Gold-Plated Plugs, Black
- Tan QY 2RCA to 2RCA Cable 3Ft, Gold-Plated 2 RCA Male to 2 RCA Male Stereo Audio Cable for Home Theater, HDTV, Gaming Consoles, Hi-Fi Systems (3Ft/1M)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-20*