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.
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
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
GENERAL
Gain Range
-93dB to +14dB
Channel Matching
0.05dB
Input Impedance (at 1kHz, BAL / SE)
50kO
Output Impedance BAL / SE
200O / 50O
Maximum Output Level BAL / SE
18Vrms / 9Vrms
BYPASS MODE
(ANALOG INPUTS, TONE / EQ / SUBWOOFERS DISABLED)
Frequency Response
(-3dB, 50O 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
7.5O, 10O, 33O, 50O, 82O, 100O, 330O, 1kO
Load for MC – High Output
47kO
MM, MC – HIGH OUTPUT
Gain (1kHz, 20O 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, 20O source impedance,
1kO load)
60dB
SNR (20Hz-20kHz)
68dB (74dB A-wtd)
Max Input Level
(overload ref 0.5mVrms, 1kO load)
12dB (20Hz), 31dB (1kHz), 52dB (10kHz)
Power
(nominal input, 0dB gain, 32O load)
540mW
Output Impedance
6.8O
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
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
