Classé Delta PRE Mk II Preamplifier
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Delta PRE Mk II Stereo Preamplifier (Single)
The Classé Delta PRE Mk II is the Delta Series stereo preamplifier, combining analogue and digital inputs, an onboard MC/MM phono stage and HEOS Built-in streaming. Priced and sold individually.
Description
The foundation of your Delta system
Delta PRE Mk II is designed to connect to a wide range of sources and extract the highest performance from every recording, whether analogue or digital, delivering balanced audio to downstream Delta components. Short signal paths minimise interference, volume is adjustable in precise 0.25dB steps, and a digital bypass mode is available to all analogue sources. Digital-domain tone control with Tilt, five-band parametric equalisation and mono or stereo subwoofer support with selectable frequency and slope give fine control over the system.
Inputs include network, USB, AES/EBU, coaxial and optical digital connections alongside XLR and RCA analogue inputs, and the high-performance onboard MC/MM phono stage supports up to two phono inputs. HEOS Built-in provides network streaming and AirPlay 2. Automation is handled via DC triggers, CAN Bus and RS-232 over RJ-45, and the anodised aluminium chassis features an adjustable-brightness touchscreen display.
- Network, USB, AES/EBU, coaxial and optical digital inputs plus XLR and RCA analogue inputs
- High-performance onboard MC/MM phono stage supporting up to two phono inputs
- HEOS Built-in streaming with AirPlay 2
- 0.25dB volume step precision
- Digital-domain tone control with Delta PRE Tilt control and five-band parametric EQ
- Mono or stereo subwoofer support with selectable frequency and slope control
- Digital bypass mode for all analogue sources, plus pass thru mode
- Adjustable-brightness touchscreen display, rhodium-plated connectors and Navcom feet
Specifications
| Model | Delta PRE Mk II |
| Pack Type | Single |
| 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/ |
| 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 |
| Measurements | |
| Dimensions (W × H × D) | 444 × 120 (including feet) × 448 (including connectors) mm |
| Net Weight | 29.8 lbs (13.5kg) |
| Gross Weight | 41.2 lbs (18.7kg) |
Caring for your Speakers and Amplifiers
To Keep your equipment safe these are some best practices to note. Please be advised that this is only to reduce the risk of misuse and is not an exhaustive list.
Speakers
- Speaker terminals are marked red and black, ensure your amplifier to the speakers are wired on the same colours
- Ensure no loose speaker wire from the red touches a loose wire from the black as this will lead to a short circuit and damage either the speaker, the amplifier or both.
- Not all speakers are designed to play at max volume, kindly consider the pairing of your amplifier and speakers
- Speaker cabinets cannot be replaced please handle with care.
AV & Stereo Amplifiers
- If your amplifier has HDMI ports, ensure all devices are off before plugging in the HDMI cable
- Turn off the amplifier before swoping out or adding speaker cable
- Amplifiers generate heat, place them in a well ventilated space. if possible avoid having anything on top of the unit.
- adding a surge protector can assist with power dips which are likely to damage your devices. Isotek and Furman are industry standard.
- Dusty environments can sometimes lead to accumulation of dust in the electronic components that might affect heat regulation
Shipping & Returns
- Free shipping on orders over R500 within the country.
- Standard delivery within 2–5 business days. Delays will be communicated. This might vary slightly depending on your location.
- Return items in original condition for a full refund. (unopened state)
- Returns that are open/unboxed will be subject to a handling fee. Refunds will only be processed after testing the unit.