DELTA™ SERIES
“There has to be
something better.”
These were the words of Mike Viglas in 1979, sending
him on a path to the founding of Classé Audio.
Mike was passionate about many things, especially music.
He loved showing off his latest Hi-Fi system at parties.
Then, the inevitable happened. BOOM! Lights flickered,
and silence. 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.
How to get both performance and reliability from high-
end audio gear? 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.
The DR-2 was introduced in 1980. It was a 25W stereo
amplifier operating in class A, widely recognized as the
purest form of amplification. It inspired the name of the
new company and other models followed. 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 are passionate about our mission and think Mike
would be proud of what we have achieved.
THE NEW
DELTA™ SERIES
Try. Evaluate. Improve. Always be open to something new.
Relentlessly attack anything that could compromise the
purest possible signal path. Strip away all unnecessary
complexity. Eliminate everything in the way of the shortest,
cleanest path possible.
We use class A circuitry, the purest form of amplification.
Circuit boards are hand-laid, using six independent layers to
optimally isolate signals, power and ground planes.
We selected only the highest quality parts, and customized
others, with a singular focus on performance. Testing,
certifications and documentation help ensure every unit is
built consistently and to the highest standards.
Whether your goal is five minutes alone with music at day’s
end to unwind, or pure sonic fidelity and reliability for a
professional studio application, the Classé Delta series exists
for you. It is the very definition of something better.
Creating something better takes work. It does not happen
by accident. After years of continuous development,
the Delta series is ready for audition.
START LISTENING
5
DELTA
PRE
PRE AMPLIFIER
The Delta™ PRE is a powerful and comprehensive control
center that helps you get the most from every source and
each recording in any room.
Every source, from Phono to Network, finds a short, direct
signal path through this preamp/DAC. Analog and digital
sources alike are rendered in exquisite detail, with vivid
tonal colors and lifelike dynamics. Features including 0.25dB
precision volume steps, bypass and pass-thru modes,
and key processing tools to maximize enjoyment of every
listening experience.
Digital processing features include fully customizable tone
controls, bass management supporting stereo subwoofers,
and five-band parametric EQ for all channels. Tone control
corrects for small imbalances common in recordings. It may
be used as a conventional bass and treble control or in Tilt
mode, where the tonal balance can be subtly tilted toward
high or low frequencies.
Get smooth and extended bass response in almost any
room by adding one or two subwoofers to help fill bass dips
and by using the PEQ to tame bass peaks.
7
DELTA
MONO
POWER AMPL IFIER
Class A is widely recognized as the purest form of amplification, where both sides of the amp track the entire
signal, thereby eliminating the crossover distortion inherent in class B and A/B designs. Delta™ series amplifiers
capitalize on class A throughout the critical range of power delivery. The Delta MONO delivers 35W in class A and
300W overall. For low-impedance loads, the amplifier will develop over 1,000W @ 2Ω. The Delta STEREO, built to
the same standard, delivers 12.5W/Ch in class A (250W/Ch overall) and develops over 350W/Ch @ 2Ω.
IC Tunnel™, pronounced “Icy Tunnel” and short for Intelligent Cooling Tunnel, is an active cooling solution used
in Delta series amplifiers. It expertly manages heat and maintains ideal operating temperatures to keep sound
consistent and stable no matter how hard the amplifiers are driven.
Lateral MOSFET transistors were selected for the critical output stage for ultimate performance. They also are
inherently more stable than bipolar transistors used in 90% of high-end amplifiers, substantially augmenting
sonic reliability. These ampliers faithfully render the source while getting the most from your speakers of choice.
DELTA
STEREO
POWER AMPL IFIER
9
™
PRE
DELTA
PRE AMPLIFIER
OVERALL DIMENSIONS
Width 17.50 in (444 mm)
Depth
(including connectors)
Height
(including feet)
WEIGHT
Gross Weight 41.2 lbs (18.7kg)
Net Weight 29.8 lbs (13.5kg)
17.68 in (449 mm)
4.78 in (121 mm)
GENERAL
Gain Range -93dB to +14dB
Channel Matching +/- 0.03dB
Input Impedance (at 1kHz, BAL / SE) 50kΩ
Output Impedance BAL / SE 200Ω / 50Ω
Maximum Output Level BAL / SE 18Vrms / 9Vrms
BYPASS MODE
(Analog inputs, Tone / EQ / Subwoofers disabled)
Frequency Response
(-3dB, 50Ω source impedance)
Harmonic Distortion
(measurement bandwidth: 90kHz)
Intermodulation Distortion
(measurement bandwidth: 90kHz)
Maximum Input Level BAL / SE
(at 0dB gain)
Signal-to-Noise Ratio (A wtd)
(22kHz BW, ref 9Vrms)
Crosstalk
(one channel undriven) (BAL / SE)
1Hz – 2MHz
<0.0004% at 1kHz
<0.0005% at 10kHz
<0.0006% at 20kHz
<0.001%
9Vrms (+21.3dBu) /
4.5Vrms (+15.3dBu)
130dB (133dBA)
-143dB (100Hz), -140dB (1kHz),
-124dB (10kHz)
PHONO SECTION
(0dB gain, Bypass Mode, XLR2 in, Main XLR out)
RIAA Deviation (20Hz-20kHz) < 0.2dB
Selectable Load for
MM Type (47k II)
Selectable Load for MC
– Low Output
Load for MC – High Output 47kΩ
50pF, 100pF, 150pF, 200pF, 250pF,
300pF, 350pF, 400pF, 450pF
7.5Ω, 10Ω, 33Ω, 50Ω, 82Ω,
100Ω, 330Ω, 1kΩ
MM, MC – High Output
Gain (1kHz, 20Ω source impedance) 41.5dB
SNR (22kHz BW, ref 5mVrms in) 86dB (93dB A-wtd)
Max Input Level
(overload ref 5mVrms)
11dB (20Hz), 23dB (1kHz),
34dB (10kHz)
MC – LOW OUTPUT
Gain (1kHz, 20Ω source impedance, 1kΩ load) 60dB
SNR (20Hz-20kHz) 68dB (74dB A-wtd)
Max Input Level
(overload ref 0.5mVrms, 1kΩ load)
*With optional HDMI switching module
12dB (20Hz), 31dB (1kHz),
52dB (10kHz)
HEADPHONES
Power (nominal input, 0dB
gain, 32Ω load)
Output Impedance 6.8Ω
540mW/Ch
FILE FORMATS AND SAMPLE RATES SUPPORTED
USB-F 44.1k, 48k, 88.2k, 96k (iOS specic)
USB-B 32k, 44.1k, 48k, 88.2k, 96k, 176.4k,
Ethernet WAV, AIFF, ALAC, FLAC, WMA, AAC,
SPDIF
(opt, coax, AES / EBU)
192k, 352.8k, 384k
DSD64, DSD128, DSD256 (native –
requires Thesycon/Classe driver for
Windows) DSD64, (DoP)
MP3, OGG_VORBIS (max 192k/24b)
DSD64, (DoP)
PCM 32k, 44.1k, 48k, 88.2k, 96k,
176.4k, 192k / DSD64
INPUT / OUTPUT COMPLEMENT
ANALOG IN
BAL / XLR 2 pairs (XLR2 can be assigned as
SE / RCA 2 pairs
Phono RCA 1 pair
BAL phono in)
DIGITAL IN
HDMI 4* (HDMI 2.0b w/HDCP 2.2)
USB-F 1
USB-B 1
SPDIF Coaxial 3
SPDIF Optical 3
SPDIF AES / EBU 1
Ethernet 1
OUTPUTS
HDMI 1* (HDMI 2.0b w/HDCP 2.2)
BAL / XLR 5 (congurable: 2pairs+1sub,
SE / RCA 5 (congurable: 2pairs+1sub,
1pair+1sub pair,…)
1pair+1sub pair,…)
AUTOMATION
DC Triggers In / Out 2 sets
CAN Bus 1 set in / out
RS-232 over RJ-45 1
™
MONO
DELTA
POWER AMPL IFIER
OVERALL DIMENSIONS
Width
Depth
Height
WEIGHT
Gross Weight
Net Weight
17.50 in (444 mm)
19.37 in (492 mm)
8.74 in (222 mm)
111.6 lbs (50.6 kg)
97.7 lbs (44.3 kg)
Frequency Response
(-3dB, 50Ω source impedance)
Continuous Output Power
(at 1kHz, 0.1% THD+N)
Harmonic Distortion
(measurement bandwidth:
500kHz, 25Vrms in 4Ω or 8 Ω)
Harmonic Distortion
(measurement bandwidth:
90kHz, 25Vrms in 4Ω or 8 Ω)
Peak Output Voltage
(nominal AC line)
Input Impedance
(at 1kHz, BAL / SE)
Voltage Gain
(at 1kHz, BAL / SE)
Intermodulation Distortion
(SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
Intermodulation Distortion
(CCIF) (8Ω or 4Ω, BAL / SE)
Signal-to-Noise Ratio
(A wtd in parenthesis) (22kHz BW)
Slew Rate 72V / μs
Output Impedance 0.01Ω (100Hz), 0.011Ω (1kHz),
Damping Factor
(at 1kHz, ref 8Ω)
All tests performed un-weighted using BAL input and 500kHz measurement bandwidth
(except when specied otherwise). Delta STEREO measurements made with both channels driven.
1Hz – 650kHz
35W @ 8Ω delivered in pure class A operation
300W @ 8Ω
600W @ 4Ω
1000 W @ 2Ω (with AC line held constant)
<0.0016% at 1kHz
<0.0018% at 10kHz
<0.0028% at 20kHz
<0.0005% at 1kHz
<0.0006% at 10kHz
<0.0015% at 20kHz
148Vp-p into 8Ω
156Vp-p no load
82kΩ
29dB
<0.001%
<0.002%
117dB (119.5dBA)
0.015Ω (10kHz)
700
™
STEREO
DELTA
POWER AMPL IFIER
OVERALL DIMENSIONS
Width
Depth
Height
WEIGHT
Gross Weight
Net Weight
17.50 in (444 mm)
19.37 in (492 mm)
8.74 in (222 mm)
116.4 lbs (52.8 kg)
102.3 lbs (46.4 kg)
Frequency Response
(-3dB, 50Ω source impedance)
Continuous Output Power
(at 1kHz, 0.1% THD+N)
Harmonic Distortion
(measurement bandwidth:
500kHz, 20Vrms in 4Ω or 8 Ω)
Harmonic Distortion
(measurement bandwidth:
90kHz, 20Vrms in 4Ω or 8 Ω)
Peak Output Voltage
(nominal AC line)
Input Impedance
(at 1kHz, BAL / SE)
Voltage Gain
(at 1kHz, BAL / SE)
Intermodulation Distortion
(SMPTE 4:1) (8Ω or 4Ω, BAL / SE)
Intermodulation Distortion
(CCIF) (8Ω or 4Ω, BAL / SE)
Signal-to-Noise Ratio
(A wtd in parenthesis) (22kHz BW)
Crosstalk
(one channel driven to 250W / 8Ω)
Slew Rate 75V / μs
Output Impedance 0.009Ω (100Hz), 0.009Ω (1kHz),
Damping Factor
(at 1kHz, ref 8Ω)
All tests performed un-weighted using BAL input and 500kHz measurement bandwidth
(except when specied otherwise). Delta STEREO measurements made with both channels driven.Specifications subject to change without notice.Specifications subject to change without notice. Specifications subject to change without notice.
1Hz – 650kHz
35W/Ch @ 8Ω delivered in pure class A operation
250W/Ch @ 8Ω
500W/Ch @ 4Ω (with AC line held constant)
350W/Ch @ 2Ω (with AC line held constant)
<0.0016% at 1kHz
<0.002% at 10kHz
<0.003% at 20kHz
<0.0007% at 1kHz
<0.001% at 10kHz
<0.0025% at 20kHz
129Vp-p into 8Ω
138Vp-p no load
82kΩ
29dB
<0.0018%
<0.004%
118dB (120dBA)
124dB (100Hz), 107dB (1kHz),
90dB (10kHz)
0.012Ω (10kHz)
850
SPECS / SPEEDS & FEEDS
380 rue McArthur
Saint-Laurent, Québec
H4T 1X8 CANADA
©2020 Classé. All Rights Reserved. www.classeaudio.com
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