Classe Delta Preamplifier MK2

PRE AMPLIFIER

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)

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)

DAC SECTION (DIGITAL INPUTS, TONE/EQ/SUBWOOFERS DISABLED) 

Frequency Response
(-3dB, sweep Fs=192kHz)

5Hz – 90kHz

Harmonic Distortion (measurement bandwidth: 90kHz)

<0.0015% (20Hz to 20kHz) 

Dynamic range (-60dBFS, Fs=44.1kHz, A-wtd)

124dB 

Signal to Noise Ratio (Fs=44.1kHz, A-wtd) 

125dB (dBA) 

DSP MODE (TONE OR EQ CONTROLS ENABLED, SET TO FLAT UNLESS NOTED) 

Frequency Response
(50Ω source impedance, Tone and EQ not enabled)

10Hz – 84.5kHz 

Harmonic Distortion
(measurement bandwidth: 90kHz)

<0.002% (20Hz to 20kHz) 

Maximum input level BAL / SE (at 0dB gain)

5.4Vrms (+2.5dBr) / 2.7Vrms (+2.5dBr)

Crosstalk (one channel undriven) (BAL/SE)

-105dB(100Hz), -120dB(1kHz), -120dB(10kHz)  

HEADPHONE OUTPUT

Power
(nominal input. 0dB gain, 32 Ω load)

540mW

Output Impedance

6.8Ω

POWER REQUIREMENTS

Standby  

0.2W 

Wake on LAN 

3.1W 

Nominal 

35W  

Max. power  

55W   

HEOS BUILT IN

Network Connection   

Ethernet 

USB-A Host  

WMA, MP3, AAC, WAV up to 192/24, FLAC up to 192/24, AIFF up to 192/24, ALAC up to 96/24, DSF up to 11.2 

Ethernet  

WMA, MP3, AAC, WAV up to 192/24, FLAC up to 192/24, AIFF up to 192/24, ALAC up to 96/24, DSF up to 11.2   

Airplay 

Airplay 2   

Music Service Providers Supported (varies by region, subject to change)  

Spotify (Connect), Tidal (including Hi Res), Deezer, Amazon Music HD, TuneIn, Pandora, Napster, iHeartRadio, Sirus XM, Soundcloud, MOOD:MIX, AWA, QPlay, Ximalaya, Sony Hi-Res  

DAC INPUTS

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, DSD128 (DoP)  

SPDIF
(opt, coax, AES/EBU)  

PCM 32k, 44.1k, 48k, 88.2k, 96k, 176.4k, 192k
/DSD64 over SPDIF/

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

USB-F

1

USB-B

1

SPDIF Coaxial

3

SPDIF Optical

3

SPDIF AES / EBU

1

Ethernet

1

OUTPUTS

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