Classé Audio DELTA PRE

Technical characteristics

Audiophiles, recording professionals and equipment auditors consider Classé amplifiers a source of sound truth. The Delta series allows listeners to experience that truth in their homes.

Every detail of the Delta series is perfected by hand in our exclusive production plant in Japan to offer a powerful, natural and expanded sound with minimal noise or distortion.

0.25 dB volume pitch accuracy to find the perfect sound level
Digital domain tone control with Delta PRE Tilt control
Support for mono or stereo subwoofers for better bass control
Frequency and control of selectable slope
Advanced parametric equalization of digital domain to five bands
Digital bypass mode available for all analog sources
Each interaction with Delta PRE is pure pleasure, from superb cool-to-the-touch materials, to precise tactile feedback of volume control.

Touchscreen control reflects Delta PRE’s exceptional ability: pure analog clarity, advanced digital precision, safe and capable power and expressive sound.

Harmony between minimal design and unrivaled performance
Luxurious anodized aluminium body
Adjustable brightness, responsive touchscreen display
Perfectly complements other Delta family members

DIMENSIONS

Width
17.50 inches (444 mm)
Depth
(including connectors)
17.68 inches (449 mm)
Height
(including feet)
4.78 inches (121 mm)
PEOPLE

Gross weight
41.7 pounds (18.7 kg)
Net weight
13.5 kg

GENERAL

Gain Range
From -93dB to + 14dB
Correspondence of the channel
0.05dB
Input impedance (at 1kHz, BAL / SE)
50k
BAL / SE output impedance
200Ω / 50Ω
Maximum output level BAL / SE
18Vrms / 9Vrms

BYPASS MODE
(ANALOGICAL INGRESSI, TONE / EQ / SUBWOOFER DISABILITIES)

Frequency response
(-3dB, source impedance 50Ω)
1Hz – 2MHz
Harmonic distortion
(measuring bandwidth: 90kHz)
Intermodulation distortion
(measuring bandwidth: 90kHz)
Maximum input level BAL / SE
(with 0 dB gain)
9Vrms (+ 21.3dBu) /
4.5Vrms (+ 15.3dBu)
Signal-to-noise ratio (A wtd)
(22kHz BW, ref 9Vrms)
130dB (133dBA)
crosstalk
(an unmanned channel) (BAL / SE)
-143dB (100Hz), -140dB (1kHz),

-124dB (10kHz)

SECTION PHONO
(GUADAGNO 0DB, MODE BYPASS, XLR2 IN, MAIN XLR OUT)

RIAA deviation (20Hz-20kHz)
Selectable load by MM type (47k II)
50pF, 100pF, 150pF, 200pF, 250pF, 300pF, 350pF, 400pF, 450pF
Selectable load for MC
– Low output
7.5Ω, 10Ω, 33Ω, 50Ω, 82Ω, 100Ω, 330Ω, 1kΩ
Charge for MC – High output
47k
MM, MC – ALTA USCITA

Gain (1kHz, source impedance 20Ω)
41.5dB
SNR (22kHz BW, ref 5mVrms in)
86dB (93dB A-wtd)
Maximum input level
(overload ref 5mVrms)
11dB (20Hz), 23dB (1kHz), 34dB (10kHz)
MC – BASSA USCITA

Gain (1kHz, source impedance 20Ω,
Charge 1kΩ)
60dB
SNR (20Hz-20kHz)
68dB (74dB A-wtd)
Maximum input level
(overload ref 0.5mVrms, 1kΩ load)
12dB (20Hz), 31dB (1kHz), 52dB (10kHz)
Energy
(Nominal input, 0dB gain, 32Ω load)
540mW
Output impedance
6.8Ω
FILE TRAINING
AND SUPPORTED FIELD TAXES

USB-F
44.1k, 48k, 88.2k, 96k (specific for iOS)
USB-B
32k, 44.1k, 48k, 88.2k, 96k, 176.4k,
192k, 352.8k, 384k

DSD64, DSD128, DSD256 (native –
requires Thesycon / Class driver
Windows) DSD64, (DoP)
Ethernet
WAV, ALAC, FLAC, WMA, AAC,

MP3, OGG_VORBIS (max 192k / 24b)

DSD64, (DoP)
SPDIF
(opt, coax, AES / EBU)
PCM 32k, 44.1k, 48k, 88.2k, 96k,

176,4 k, 192 k / DSD64
COMPLEMENTATION INGRESS / USE
ANALOGUE

BAL / XLR
2 pairs (XLR2 can be assigned as
BAL phono in)
SE / RCA
2 pairs
Phono RCA
1 pair
DIGITAL

HDMI
4 * (HDMI 2.0b with HDCP 2.2)
USB-F
1
USB-B
1
Coaxial SPDIF
3
Optical SPDIF
3
SPDIF AES / EBU
1
Ethernet
1
USCITE

HDMI
1 * (HDMI 2.0b with HDCP 2.2)
BAL / XLR
5 (configurable: 2pairs + 1sub,

1 pair + 1 pair, ...)
SE / RCA
5 (configurable: 2pairs + 1sub,

1 pair + 1 pair, ...)
AUTHORATION

DC activates / deactivates triggers
2 sets
CAN Bus
1 set in / out
RS-232 on RJ-45