ADI-8 QS

8-Channel AD/DA Converter with MADI Option

Professional 8-Channel AD/DA Converter
Reference Low Latency Conversion
8-Channel Analog <> AES / ADAT Interface
Optional 64-Channel MADI Interface
24 Bit / 192 kHz Digital Audio
MIDI Remote Control

Description
More information

RME’s ADI-8 QS is an 8-Channel hi-end AD/DA converter with an unrivalled bunch of features. The device combines excellent analog circuit design with outstanding low latency AD/DA converter chips of the latest generation. Along with the integrated SteadyClock, the QS offers an AD- and DA-conversion of the highest quality.

Analog and digital limiters, 4 hardware reference levels up to +24 dBu, AES/EBU and ADAT I/O (optional MADI I/O) at up to 192 kHz, remote control via MIDI, digital input and output trimming for full level calibration, volume control for all 8 analog outputs, either separately or globally, digital thru-mode, operation over a wide voltage range and many more features make the QS truely unique.

The ADI-8 QS is RME’s reference – highest performance in every detail, at an unbeaten price/performance ratio!

Features

AD/DA converter in professional studio quality
Powerful headphone amplifier with analog and digital input
Multi-format converter (AES, SPDIF, ADAT) with monitoring
SPDIF/ADAT playback system
Analog impedance converter
Analog level adaptation
Analog balanced converter (unbalanced to balanced)
Analog distribution amp

The 1 U height device offers an outstanding AD/DA conversion from/to AES/EBU and ADAT (MADI optional), at up to 192 kHz. The balanced inputs and outputs use RMEs circuit design, therefore guarantee outstanding noise and distortion values. Four different input and output levels each are available, offering a perfect adaptation to the analog domain. The latest generation AD/DA converters provide sample rates up to 192 kHz with a SNR of 120 dBA.

Due to its efficient jitter reduction, SteadyClock(TM) guarantees pristine sound quality independently from the quality of the external clock signal. Additionally Intelligent Clock Control (ICC) will retain the last valid sample frequency in case of a loss of the input signal.

The technologies known from other RME products like SyncCheck ® ensure perfect synchronization and clear detection of errors. Multiple units can be stacked and operated sample-aligned, using word clock. All settings are stored when the unit is switched off.

The QS can be fully remote controlled and configured via MIDI, and all status displays can be queried through MIDI. Each QS can be given a separate ID, allowing separate remote controllability of various devices with only one MIDI channel.

Low Latency

In the QS RME uses a high-class AD converter from Cirrus Logic, offering exceptional Signal to Noise and distortion figures. But the biggest difference to all other ADCs out there is its innovative digital filter, achieving for the first time a delay of only 12 samples in Single Speed (0.25 ms), 9 samples in Double Speed (0.09 ms), and 5 (!) samples in Quad Speed (0.026 ms).

These values are less than a quarter of those available from even much more expensive devices. They represent an important step in further reducing the latency in the computer-based recording studio. At DS and QS the added latency can simply be ignored. The DA-converter offers similar conversion in the range of 5 to 10 samples, turning analog digital monitoring into real analog-style monitoring!

Resolution: 24 bit
Signal to Noise ratio (SNR) @ +24 dBu, 44.1 kHz: 114.0 dB RMS unweighted, 117 dBA
Signal to Noise ratio (SNR) @ +19 dBu: 114.0 dB RMS unweighted, 117 dBA
Signal to Noise ratio (SNR) @ +13 dBu: 113.6 dB RMS unweighted, 116.6 dBA
Signal to Noise ratio (SNR) @ +4.2 dBu: 109.8 dB RMS unweighted, 113 dBA
Frequency response @ 44.1 kHz, -0.5 dB: 5 Hz – 21.5 kHz
Frequency response @ 96 kHz, -0.5 dB: 5 Hz – 45.5 kHz
Frequency response @ 192 kHz, -1 dB: 5 Hz – 66.5 kHz
THD: < -110 dB, < 0.00032 %
THD+N: < -104 dB, < 0.00063 %
Channel separation: > 110 dB

DA-Conversion

Resolution: 24 bit
Signal to Noise ratio (SNR) @ +24 dBu, 44.1 kHz: 117,0 dB RMS unweighted, 120 dBA
Signal to Noise ratio (SNR) @ +19 dBu: 117 dB RMS unweighted, 120 dBA
Signal to Noise ratio (SNR) @ +13 dBu: 117 dB RMS unweighted, 120 dBA
Signal to Noise ratio (SNR) @ +4.2 dBu: 114 dB RMS unweighted, 117 dBA
Frequency response @ 44.1 kHz, -0.5 dB: 5 Hz – 22 kHz
Frequency response @ 96 kHz, -0.5 dB: 5 Hz – 45.9 kHz
Frequency response @ 192 kHz, -1 dB: 5 Hz - 90 kHz
THD: < -104 dB, < 0.00063 %
THD+N: < -102 dB, < 0.0008 %
Channel separation: > 110 dB

Line Out 1-8, TRS

Maximum output level: +21 dBu
Output: 6.3 mm TRS jack, servo-balanced
Output impedance: 75 Ohm
Output level switchable +4.2 dBu, +13 dBu, +19 dBu @ 0 dBFS

Line Out 1-8, D-Sub

Maximum output level: +27 dBu
Output: D-sub 25-pin, electronically balanced
Output impedance: 150 Ohm
Output level switchable +4.2 dBu, +13 dBu, +19 dBu, +24 dBu @ 0 dBFS

Digital Inputs

AES/EBU

4 x 25-pin D-sub, transformer-balanced, galvanically isolated, according to AES3-1992
High-sensitivity input stage (< 0.3 Vpp)
SPDIF compatible (IEC 60958)
Accepts Consumer and Professional format
Lock Range: 27 kHz – 200 kHz
Jitter when synced to input signal: < 1 ns
Jitter suppression: > 30 dB (2.4 kHz)

ADAT Optical

2 x TOSLINK, according to Alesis specification
Standard: 8 channels 24 bit, up to 48 kHz
S/MUX: 2 x 8 channels 24 bit / 48 kHz, equalling 8 channels 24 bit 96 kHz
S/MUX4: 2 x 8 channels 24 bit / 48 kHz, equalling 4 channels 24 bit 192 kHz
Bitclock PLL ensures perfect synchronization even in varispeed operation
Lock range: 31.5 kHz – 54 kHz
Jitter when synced to input signal: < 1 ns
Jitter suppression: > 30 dB (2.4 kHz)

Word Clock

BNC, not terminated (10 kOhm)
Switch for internal termination 75 Ohm
Automatic Double/Quad Speed detection and internal conversion to Single Speed
SteadyClock guarantees super low jitter synchronization even in varispeed operation
Transformer coupled, galvanically isolated input
Not affected by DC-offsets within the network
Signal Adaptation Circuit: signal refresh through auto-center and hysteresis
Overvoltage protection
Level range: 1.0 Vpp – 5.6 Vpp
Lock Range: 27 kHz – 200 kHz
Jitter when synced to input signal: < 1 ns
Jitter suppression: > 30 dB (2.4 kHz)

I64 MADI Card

Coaxial via BNC, 75 Ohm, according to AES10-1991
High-sensitivity input stage (< 0.2 Vpp)
Optical via FDDI duplex SC connector
62.5/125 and 50/125 compatible
Accepts 56 channel and 64 channel mode, and 96k frame
Single Wire: up to 64 channels 24 bit 48 kHz
Double Wire / 96k frame: up to 32 channels 24 bit 96 kHz
Quad Wire: up to 16 channels 24 bit 192 kHz
Lock range: 28 kHz – 54 kHz
Jitter when synced to input signal: < 1 ns
Jitter suppression: > 30 dB (2.4 kHz)

Digital Outputs

AES/EBU

4 x, transformer-balanced, galvanically isolated, according to AES3-1992
Output voltage Professional 4.0 Vpp
Format Professional according to AES3-1992 Amendment 4
Single Wire: 4 x 2 channels 24 bit, up to 192 kHz

ADAT

2 x TOSLINK
Standard: 8 channels 24 bit, up to 48 kHz
S/MUX: 16 channels 24 bit / 48 kHz, equalling 8 channels 24 bit 96 kHz
S/MUX4: 16 channels 24 bit / 48 kHz, equalling 4 channels 24 bit 192 kHz

Word Clock

BNC
Max. output voltage: 5 Vpp
Output voltage @ 75 Ohm: 4.0 Vpp
Impedance: 10 Ohm
Frequency range: 27 kHz – 200 kHz

I64 MADI Card

Coaxial via BNC, 75 Ohm, according to AES10-1991
Output voltage 600 mVpp
Cable length coaxial: up to 100 m
Optical via FDDI duplex SC connector
62.5/125 and 50/125 compatible
Cable length optical: more than 500 m
Generates 56 channel and 64 channel mode, and 96k frame
Single Wire: up to 64 channels 24 bit 48 kHz
Double Wire / 96k frame: up to 32 channels 24 bit 96 kHz
Quad Wire: up to 16 channels 24 bit 192 kHz

Digital

Clocks: Internal, AES In, ADAT In, Word Clock In, Option In
Low Jitter Design: < 1 ns in PLL mode, all inputs
Internal clock: 800 ps Jitter, Random Spread Spectrum
Jitter suppression of external clocks: > 30 dB (2.4 kHz)
Effective clock jitter influence on AD-conversion: near zero
PLL ensures zero dropout, even at more than 100 ns jitter
Supported sample rates: 28 kHz up to 200 kHz

MIDI

16 channels MIDI
5-pin DIN jacks
Optocoupled, ground-free input

I64 MADI Card

Invisible transmission via User bit of channel 56 (48k frame)

General

Power supply: Internal switching PSU, 100 - 240 V AC, 40 Watts
Typical power consumption: 23 Watts
Maximum power consumption: < 30 Watts
Dimensions including rack ears (WxHxD): 483 x 44 x 242 mm (19" x 1.73" x 9.5")
Dimensions without rack ears/handles (WxHxD): 436 x 44 x 235 mm (17.2" x 1.73" x 9.3")
Weight: 3 kg ( 6.6 lbs)
Temperature range: +5° up to +50° Celsius (41° F up to 122°F)
Relative humidity: < 75%, non condensing

ADI-8 QS

8-Channel AD/DA Converter with MADI Option

Features

Low Latency

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