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
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
OVERALL DIMENSIONS
Width
17.50 in (444 mm)
Depth
(including connectors)
17.68 in (449 mm)
Height
(including feet)
4.78 in (121 mm)
WEIGHT
Gross Weight
41.2 lbs (18.7kg)
Net Weight
29.8 lbs (13.5kg)
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)
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 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
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