Classe Updated Delta Series Stereo Pre-Amplifier

FIDELITY

Delta PRE is the foundation of your perfect system.
Designed to connect to a range of sources, Delta PRE will extract the highest performance from every recording, whether analog or digital.
Pre-amplifiers provide clean and controlled signals to the power stage. Both precision and perfection are required, and are delivered by Delta PRE.

• Network, USB, AES/EBU, coax and optical inputs with optional HDMI
• XLR and RCA inputs
• Short signal paths to minimise signal interference
• Custom-made Navcom® feet absorb and reduce vibrations
• High-performance onboard MC/MM Phono stage supports up to two phono inputs
• Rhodium-plated connectors for excellent and secure contacts

CONTROL

Audiophiles, recording professionals and equipment reviewers trust Classé amplifiers as a source of sonic truth. Delta Series allows listeners to experience that truth in their own homes.
Every detail of the Delta Series is perfected by hand in our unique production facility in Japan to deliver powerful, natural, expansive sound with minimal noise or distortion.

• 0.25dB volume step precision to find your perfect sound level
• Digital domain tone control with Delta PRE Tilt control
• Support for mono or stereo subwoofers for better control of bass
• Selectable frequency and slope control
• Advanced five-band digital domain parametric equalization
• Digital bypass mode available to all analog sources
• Pass thru mode

DESIGN

As the component you’re most likely to touch, the design of Delta PRE matches its exceptional acoustic performance.
Any interacting with Delta PRE is pure pleasure, from the superb cool-to-the-touch materials, to the precise tactile feedback of the volume control.
Touchscreen control reflects Delta PRE’s outstanding capability : pure analog clarity, advanced digital precision, confident, capable power and expressive sound.

• Harmony between minimal design and unrivalled performance
• Luxurious anodized aluminum body
• Adjustable brightness, responsive touchscreen display
• Perfectly complements other components in the Delta family

ENHANCE YOUR DELTA PRE

Your Classé system deserves an upgrade. Add high-resolution streaming through HEOS® for the most optimal audio performance from any source.
Simply contact one of our certified service centers here, and our specialists will update your current Delta PRE with an upgrade kit to unlock high-resolution streaming with HEOS.
Please note, by upgrading an existing Delta PRE to Delta PRE Mk II, the unit will no longer be compatible with HDMI.

Specifications

General

Gain Range -93dB to +14dB
Channel Matching 0.05dB
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) 1Hz – 2MHz
Harmonic Distortion (measurement bandwidth: 90kHz) <0.0004% at 1kHz <0.0005% at 10kHz <0.0006% at 20kHz
Intermodulation Distortion (measurement bandwidth: 90kHz) <0.001%
Maximum Input Level BAL / SE (at 0dB gain) 9Vrms (+21.3dBu) / 4.5Vrms (+15.3dBu)
Signal-to-Noise Ratio (A wtd) (22kHz BW, ref 9Vrms) 130dB (133dBA)
Crosstalk (one channel undriven) (BAL / SE) -143dB (100Hz), -140dB (1kHz), -124dB (10kHz)
RIAA Deviation (20Hz-20kHz) < 0.2dB
Selectable Load for 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
Load for MC – High Output 47kΩ

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) 12dB (20Hz), 31dB (1kHz), 52dB (10kHz)

HEADPHONE OUTPUT

Power (nominal input. 0dB gain, 32 Ω load) 540mW
Output Impedance 6.8Ω
USB-F 44.1k, 48k, 88.2k, 96k (iOS specific)
USB-B 32k, 44.1k, 48k, 88.2k, 96k, 176.4k,192k, 352.8k, 384k, DSD64, DSD128, DSD256 (native – requires Thesycon/Classe driver for Windows) DSD64, (DoP)
Ethernet WAV, AIFF, 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, 176.4k, 192k / DSD64

INPUT / OUTPUT COMPLEMENT ANALOG IN

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

DIGITAL IN

HDMI *(optional) 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 *(optional) 1* (HDMI 2.0b w/HDCP 2.2)
BAL / XLR 5 (configurable: 2pairs+1sub, 1pair+1sub pair,…)
SE / RCA 5 (configurable: 2pairs+1sub, 1pair+1sub pair,…)

AUTOMATION

DC Triggers In / Out 2 sets
CAN Bus 1 set in / out
RS-232 over RJ-45 1

Package Contents: Classe Updated Delta Series Stereo Pre-Amplifier, Power cable, Manual.