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Delta MONO
Delta MONO
Delta MONO
Classé

Delta MONO

Power Amplifier

Series Delta

Delta MONO embodies exquisite, controlled, unending power. A perfectly detailed enclosure cradles a highly innovative blend of technologies and hand-selected components which deliver effortless, refined sound.

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Frequency response
1 Hz to 650 kHz
Dimensions (W × H × D)
444.5 × 222 × 492 mm
Weight
44.3 kg
Width
17.50 in (444 mm)
Depth
19.37 in (492 mm)
Height
8.74 in (222 mm)
Price on requestCheck availability

Overview

Delta MONO is crafted for exceptional performance and durability – every detail superbly refined. The first 35W of power are pure Class A, and with over 300W per unit total (1,000W @ 2Ω) at its command, Delta MONO will confidently control any loudspeaker.

Highlights

  • Up to 35W delivered in pure Class A operation
  • 300W per unit total
  • Massive, high-quality power supply
  • Custom toroidal transformer
  • Hand-laid circuit boards
  • 6-layer circuit boards provide for shortened signal and power pathways with lowest noise
  • Fully balanced output stage and balanced circuitry
  • 22 4-pole Mundorf® capacitors
  • Custom-made Navcom® feet to absorb vibrations
  • Furutech® rhodium-plated RCA and torque-guard speaker connectors
  • Harmony between minimal design and unrivalled performance
  • Luxurious anodized aluminum body
  • Custom, illuminated VU meters
  • Perfectly complements other components in the Delta family
  • Proprietary ICTunnel™ temperature regulation technology
  • Power-on to optimal temperature in minutes
  • Active sensing and regulation of optimal amplifier temperature
  • Low-noise operation suitable for studio applications

About Classé

“There has to be something better.” These were the words of Mike Viglas in 1979, sending him on a path to partnership with engineer David Reich and the founding of Classé Audio. Mike knew what it was to work hard and build things. A Greek immigrant, Mike arrived in Montréal, Canada as a young man with little money but plenty of energy and determination. He was welcomed by French-Canada and embraced it in return. Opportunities arose wherever Mike made them and year after year he built on his successes. Winters in Florida and summers in Canada, Mike was comfortable, living the good life. Mike was passionate about many things, especially music. His hi fi system was truly high-end and he loved showing it off at parties. While no one could believe that a stereo could cost so much, everyone agreed it sounded amazing. Then the inevitable happened. BOOM! Lights flickered, silence, a strange odor permeated the room and particles, formerly contained within his beloved vacuum-tubed amplifier descended. As the guests pulled capacitor wadding from their hair, Mike, embarrassed, vowed that it would not happen again. There had to be a better way. The problem is common even today. How to get both performance and reliability from high-end electronics? This was top of mind when Mike met David Reich, a talented young engineer building his own solid-state amplifiers. Mike was instantly taken with the sound of David’s amp and together they set out to realize that vow. Classé was founded. Their first amplifier, the DR-2, was introduced in 1980. It was a 25W stereo amplifier operating in class A, which inspired the name of the new company. Other models followed and Classé quickly earned a reputation for both reliability and its open, natural, authoritative sound. Forty years on, Classé remains at the forefront of audio. The iconoclastic and talented Classé Design team in Montréal now has a global reach, being larger and more diverse than ever. Precision manufacturing at the legendary Shirakawa Audio Works in Northern Japan allows today’s Classé to deliver on the performance and reliability always demanded by Mike Viglas. We think he would be proud of what we have achieved. Dave Nauber Brand Director – Classé

All Classé products

Features

3
  • Clarity

    Clarity

    Delta MONO delivers the utmost clarity in everything you hear. Every detail communicates natural, authoritative sound. An expansive dynamic range with infinitesimal noise delivers unsurpassed fidelity to the musical source. Start listening.

  • Design

    Design

    Delta MONO continues Classé’s reputation for monumental design. The amplifier creates an immediate presence in any room or installation through its unique form and superb materials. The illuminated VU meter beautifully communicates output with elegance and detail. This is an amplifier that looks as iconic as it sounds.

  • Versatility

    Versatility

    Thanks to the unique ICTunnel™ cooling technology, Delta MONO is stackable and rackable in a way no conventionally-cooled amplifier can match. Internal temperature is continuously monitored and controlled, ensuring performance in any configuration. Combined with Delta MONO’s construction, ICTunnel supports a lifetime of unrivalled amplification performance.

Specifications

Frequency response
1 Hz to 650 kHz
The range of pitches it reproduces, from deep bass to the top of the treble.
Dimensions (W × H × D)
444.5 × 222 × 492 mm
Width, height and depth, without cables.
Weight
44.3 kg
Per unit, out of the box.
Model code
CLASSE-DELTA-MONO
Quote it when you ask a specialist.

Overall Dimensions

Width
17.50 in (444 mm)
Depth
19.37 in (492 mm)
Height
8.74 in (222 mm)

Weight

Gross Weight
111.6 lbs (50.6 kg)
Net Weight
97.7 lbs (44.3 kg)

General

Frequency Response (-3dB, 50Ω source impedance)
1Hz – 650kHz
Continuous Output Power (at 1kHz, 0.1% THD+N)
35W / 8Ω (Pure Class-A Operation) 300W / 8Ω 600W / 4Ω 1000W / 2Ω (with AC line held constant)
Harmonic Distortion (measurement bandwidth: 500kHz, 25Vrms in 4Ω or 8 Ω)
<0.0016% at 1kHz <0.0018% at 10kHz <0.0028% at 20kHz
Harmonic Distortion (measurement bandwidth: 90kHz, 25Vrms in 4Ω or 8 Ω)
<0.0005% at 1kHz <0.0006% at 10kHz <0.0015% at 20kHz
Peak Output Voltage (nominal AC line)
148Vp-p into 8Ω 156Vp-p no load
Input Impedance (at 1kHz, BAL / SE)
82kΩ
Voltage Gain (at 1kHz, BAL / SE)
29dB
Intermodulation Distortion (SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
<0.001%
Intermodulation Distortion (CCIF) (8Ω or 4Ω, BAL / SE)
<0.002%
Signal-to-Noise Ratio (A wtd in parenthesis) (22kHz BW)
117dB (119.5dBA)
Slew Rate
72V / μs
Output Impedance
0.01Ω (100Hz), 0.011Ω (1kHz), 0.015Ω (10kHz)
Damping Factor (at 1kHz, ref 8Ω)
700

Downloads

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Awards and press

4
  • Hi-Fi News & Record Review Best in Class 2021-22

    "The latest Classe Delta amps are a triumph, combining a hugely flexible and ultra clean-sounding preamplifier with power amplifiers as capable of mighty clout as they are revealing of the smallest of detail" — Andrew Everard

    Hi-Fi News & Record Review
  • "No other audio company offers this combination of operational flexibility, high-quality parts, thoughtful design, build quality, and faithfulness to the performance of music. Well done, Classé!" — Dave Thomas

    Stereo Times
  • SoundStage! Network Reviewers’ Choice

    "Is Classé Audio’s new Delta MONO worthy of a Reviewers’ Choice award? Unequivocally. Is Classé getting my review samples back? Not a chance... I’ve found my new reference Monoblock." - Aron Garrecht

    SoundStage! Ultra
  • Stereophile Recommended Component 2021, Class A

    Amplification Component of the Year Finalist. “Their transparency, coupled with smooth high frequencies and excellent low-frequency control and articulation, were addictive.” – John Atkinson

    Stereophile

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