The Delta PRE is the foundation of your perfect system. Designed to connect to a range of sources, the PRE will exact the highest performance from every recording, whether analog or digital. Classé Delta PRE is a one-box stereo pre-amplifier/DAC featuring USB A/B inputs, Ethernet, AES/EBU, Coax, Optical, Balanced and Single-ended analogue, plus a built-in MM/MC Phono stage.It also features subwoofer output(s) w/gain and phase control, a 5-band parametric EQ per channel, and Tone Controls with Tilt and adj. Freq.
There's also a 4 x 1 HDMI switching module available to accommodate systems with AV sources.
The Delta PRE uses touchscreen control that enables a high degree of customization which according to the company, remains intuitive and straightforward for everyday use. Control apps for iOS and Android devices and IP control also provide ease and flexibility of operation from the listening chair.
Specification:
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)
PHONO SECTION(0DB GAIN, BYPASS MODE, XLR2 IN, MAIN XLR OUT):
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)
Power(nominal input, 0dB gain, 32Ω load):540mW
Output Impedance:6.8Ω
FILE FORMATS AND SAMPLE RATES SUPPORTED:
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 forWindows) 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
GENERAL:
Width:17.50 in (444 mm)
Depth(including connectors):17.68 in (449 mm)
Height(including feet):4.78 in (121 mm)
Gross Weight:41.2 lbs (18.7kg)
Net Weight:29.8 lbs (13.5kg)
