High-quality wireless Bluetooth(aptX) with NFC for pairing. No tedious setup is required, the most
convenient wireless connection with excellent sound.
Pure vacuum tube 25W + 25W* amplifier. For lush, open and fluid sound reproduction.
•
•
Pure vacuum tube headphone Turbo® 7,000 mW output power; able to drive even the most difficult
of headphones.
Independent scientific research shows pure tube amplifiers reduce listener stress and improve the
•
sense of well-being when listening to music**.
Native Octa-DSD512(24MHz), PCM768kHz, 2xDXD, the most advanced digital audio formats
•
available are supported together with all other DSD, PCM and DXD formats available.
•
Minimum phase, minimum ringing digital filter is employed for PCM up to 192KHz. Pure analogue,
no-ringing filtering is used for DXD/2xDXD as well as DSD. This removes a key factor in listener
f a t i g u e a n d t h e p e r c e p t i o n o f d i g i t a l s o u n d a s " a g g r e s s i v e " c a u s e d b y t h e h i g h - f r e q u e n c y r i n g i n g
and distortion inherent to all standard digital filters and most digital playback systems.
High-resolution audio USB, Coaxial, Optical digital inputs. Instantly upgrade the sound quality
•
from any available digital music sources.
3D Holographic Sound Systems® for Headphones and Speakers. Delivers a wide open and spatially
•
correct sound stage for speakers and headphones, reduces listening stress from "in head
localisation" with headphones.
XBass® for the best bass and dynamically corrects the Bass response to match the human hearing.
•
Ultra-wide gain range MM/MC phono pre-amplifier, able to match all phono cartridges.
•
Precision studio-grade tone controls, accurate, repeatable adjustment with unparalleled
•
t r a n s p a r e n c y .
Analogue volume control with remote control, retain all the low-level music information in
•
high-resolution audio.
Measured using a music signal into the matching speaker at the onset of clipping
*
Ackerman, J; doctoral thesis; 2000; Frankfurt Hochschule für Musik und Darstellende Kunst
**
1
1
6
1
7
1
9
1
8
1
10
1
11
1
12
1
13114
1
15
1
16
Bass Treble
On
1.
P o w e r L E D
ON/OFF.
2.
P o w e r S w i t c h
1
1
1
2
45 seconds warm-up time.
TONE
INPUTVOLUME
3/Phono
2
Direct
Input
On
Off
INPUTPOWER
2
1
3
Bass
Coaxial/ Optic al
50
RETRO
Digital
Input
USB
Bluetooth
1
1
4
3D Holographic Sound System
10.
●●●
For narrow (<1.5m apart) speaker
placement.
For Normal Use (Recommended).
OFF
●
-
1
5
3. Analogue
Input-
3.5mm
Shared with INPUT 2 at rear.
4.
Headphone Output-
3.5mm(Normal)
For high sensitivity Headphones and
In-Ear-Monitors (IEMs).
5.
Headphone Output-
6.3mm(Turbo)
For normal sensitivity Headphones.
6.
Tone Control - Bass
See Phono Settings card
for additional Phono EQ details.
7.
Tone Control - Treble
See Phono Settings card
for additional Phono EQ details.
8.
Format Indicators
DXD,DSD,PCM. See LED Status
card for details.
9.
Direct Input
ON to bypass the Tone Controls.
XBass System
11.
●●●
Maximum Bass correction
(Recommended when the RETRO
LS3.5 is used with speaker stands).
Moderate Bass correction
●
(Recommended for RETRO LS3.5 under
normal setup).
OFF
-
Digital Audio Input Selector
12.
For USB, Coaxial/Optical, Bluetooth inputs.
Status Indicator
13.
See LED Status card for details.
Input Selector
14.
Digital Input
Input1
Input2
Input3/Phono
Remote Control Receiver
15.
Volume Control
16.
Also controlled by the remote control.
2
2829
RIGHTLEFT
SPEAKERS
4 - 1 6 O h m
17
18
PHONO
GROUND
Pairing
MC
Low
MC
High
MM
Line 3
(+6dB)
MC
Low
P H O N O
AUDIO INPUTS
MC High
MM / Line 3
COAXIAL
21
OPTICAL
L
R
D I G I T A L I N P U T S
19
20
Bluetooth Pairing Switch
17.
For pairing new Bluetooth devices.
Phono Ground
.
18
Connect the Ground wire from
the turntable.
L i n e 3 M o d e S e l e c t i o n
.
19
See Phono Settings card for details.
MC Low Input
.
20
For connecting an MC cartridge.
MC High/MM/Line 3
.
21
For connecting a High-Output MC cartridge,
MM cartridge or Line-Level equipment.
21
22
23
USB
24
RETRO
50
Technology licensed from
AMR-Audio, UK Assemb led in China
25
8X
2X
1X
Direct S trea m Di git al
DigitaleXtrem e Definition
Bass
®
768
705
4X
2X
384
1X
Pulse Code Modulation
352
®
F U S E 2 A
SLOW BLOW
26
Digital Audio Input
24.
AC IN 100-240V
S&E
27
Retro
ifi-audio.com
Coaxial/Optical (auto-switching).
USB Input
25.
MAC OSX (10.6 or later) has built-in
n a t i v e s u p p o r t f o r t h e R e t r o S t e r e o 5 0 D A C .
MS Windows (XP or later), please download
and install the driver software
b e f o r e
connecting the Retro Stereo 50 DAC to the
computer
Fuse
26.
(www.ifi-audio.com).
2A slow-blow fuse.
Mains Power Input
27.
100-240V AC.
Input 2
22.
Shared with front 3.5mm input.
Input 1
23.
Shared with the 3.5mm input.
Speaker Outputs
28.
Compatible with 4-16 Ohm Speakers.
Bluetooth Antenna
29.
Please set to an upright position for the
best reception.
3
System Connection Diagram
Smart Devices
Wireless Bluetooth
TONE
Bass Trebl e
On
Direct
Input
On
Off
INPUTPOWER
2
In-Ear-Monitors
INPUTVOLUME
3/Phono
2
1
Digital
Bass
Input
USB
Coaxial/Optical
Bluetooth
50
RETRO
Over-the-Ear
Headphones
A u d i o R C A c a b l e
T u r n t a b l e
RIGHTLEFT
SPEAKERS
4 -1 6 O h m
21
L
R
COAXIA L
OPTICAL
DIGITAL INPUTS
USB
Technology licensed from
AMR-Audio, UK As semble d in Chi na
AUDIO INPUTS
MC High
MC
Low
MM / Line 3
Pairin g
PHONO
GROUND
MC
Low
MC
High
MM
Line 3
(+6dB)
P H O N O
Digital Coaxial/Optical cable
Tuner,
Cassette Deck etc.
RETRO
50
Digital eXtrem e Defini ti o n
Bass
8X
768
2X
4X
705
1X
2X
384
1X
Direct Stream Digital
352
Pulse Code Mo dul a ti on
®
AC IN 100-240V
®
F U S E 2 A
S L O W B L O W
S&E
ifi-audio.com
Retro
U S B c a b l e
Blu-ray/DVD/CD Player,
Set-top-box,
Network Streamer
Loudspeakers
Computer
4
Computer
Connection method: USB cable
S t e p 1 :
DIGITAL INPUTS
COAXIAL
OPTICAL
USB
Connect the USB cable from the computer to the iFi RETRO Stereo 50's USB input.
S t e p 2 :
Digital
Input
USB
Coaxial/Optical
Bluetooth
INPUT
3/Phono
2
1
Select “” and “” from the “” selector.DigitalInput USBINPUT
LED Status
The LED indicates the sampling rate of the incoming digital signal
Format Indicator
Direct
Input
Bass
Digital
Input
Status Indicator
USB
Coaxial/Optical
Bluetooth
Description
44/48kHz
88/96kHz
176/192kHz
352/384kHz
705/768kHz
DSD64()2.8/3.1MHz
DSD128(5.6)/6.2MHz
DSD256(11.2)/12.4MHz
DSD512(22.6)/24.6MHz
No music playing
Input
USB
Digital Audio
Status
Indicator
Green
Y e l l o w
Cyan
Magenta
White
Green
Y e l l o w
Magenta
White
None
On
Off
F o r m a t
Indicator
PCM
PCM
PCM
DXD
DXD
DSD
DSD
DSD
DSD
-
Tip:
•
The iFi Retro Stereo 50's DAC's design is based on the award winning iFi micro iDSD. It uses Minimum Phase
(44.1kHz-192kHz) and Bit-Perfect (352kHz or above) filter for the best sound.
•
For connection to Apple devices, the Apple USB Camera Adapter is required. For connection to Android
devices, an OTG cable and appropriate OS support are required. For more information, please refer to
www.ifi-audio.com.
•
MAC OSX (10.6 or later) has built-in native support for the iFi Retro.
MS Windows (XP or later), please download and install the driver software BEFORE connecting the iFi Retro
to the computer (www.ifi-audio.com).
For the best sound quality, always set the volume control on the computer and the playback software to 100%.
•
5
Blu-Ray/DVD/CD Player, Set-Top Box,
N et wo r k S t re a me r
Connection method: Digital Audio (SPDIF) connection with either coaxial cable or optical cable
Step 1:
DIGITAL INPUTS
COAXIAL
OPTICAL
If the source component has a coaxial digital output, connect the coaxial cable from the
source component to the iFi RETRO Stereo 50's intelligent digital audio input.
If the source component has an optical digital output, use the enclosed adapter to connect the
coaxial cable from the source component to the iFi RETRO Stereo 50's intelligent digital audio input.
Step 2:
Digital
Input
USB
INPUT
3/Phono
2
1
USB
Coaxial/Optical
Bluetooth
S e l e c t “” a n d “” f r o m t h e “” s e l e c t o r .DigitalInputCoaxial/OpticalINPUT
LED Status
The LED indicates the sampling rate of the incoming digital signal
Direct
Input
On
Off
F o r m a t
Indicator
PCM
PCM
PCM
-
Input
SPDIF
Format Indicator
Status
Indicator
Green
Y e l l o w
Cyan
None
Tip:
The intelligent Coax/Optical Digital Input will switch between the appropriate coaxial or optical
•
d i g i t a l s i g n a l s .
Digital
Bass
Coaxial/Optical
Bluetooth
Input
USB
Status Indicator
Description
44/48kHz
88/96kHz
176/192kHz
No music playing
•
A Toslink Mini-Plug to Toslink adaptor is included for connecting a normal Toslink optical cable.
•
If the music source has both coaxial and optical outputs available, the coaxial connection will
usually provide a better quality sound.
6
Mobile Smart devices (iOS/Android)
Connection method: Bluetooth wireless
Previously paired devices
S t e p 1 :
INPUT
3/Phono
2
Digital
Input
Coaxial/Optical
Bluetooth
S e l e c t “” a n d “” f r o m t h e “” s e l e c t o r .DigitalInputBluetoothINPUT
Step 2:
Turn on the Bluetooth on the smart device and look for:
“” a n d s e l e c t p r e s s “” w i t h i n 2 0 s e ciFi HQ(aptX) AudioConnect.
Unpaired devices
Step 1:
Select “” and “” from the “” selector.DigitalInputBluetoothINPUT
1
USB
Step 2:
Press and hold the pairing button for one second.
Step 3:
T u r n o n t h e B l u e t o o t h o n t h e s m a r t d e v i c e a n d l o o k f o r :
“” a n d s e l e c t p r e s s “”iFi HQ(aptX) AudioConnect.
The LED indicates the Bluetooth Status
Direct
Input
On
Off
F o r m a t
Indicator
PCM
PCM
PCM
Input
Bluetooth
Format Indicator
Status
Indicator
Flashing Blue
Blue
Blue/Red
Digital
Bass
Coaxial/Optical
Bluetooth
Input
USB
Description
N o t C o n n e c t e d
Connected
Pairing
Status Indicator
Tip:
•
aptX® is the latest development in wireless audio and it enables CD-like quality over a Bluetooth
connection. Most upmarket Android smartphones from reputable manufacturers (e.g. Sony,
Samsung, LG etc.) already have aptX supported built-in. Also aptX is available on many notebook
computers (e.g. Apple Macbook Air, MacBook Pro, Samsung notebook etc.)
•
The Power on sequence of the Bluetooth system is:
ON Auto Connect (20sec) Auto Pairing (5min) Sleep
7
Whenever Bluetooth is selected, the RETRO Stereo 50 will spend 20 seconds “searching” for
•
the last connected device. If it cannot find a previously connected device, it will go into
Auto-pairing mode for 5 minutes before falling back to Sleep mode.
•
Under Sleep Mode, a previously device can be connected to the iFi RETRO Stereo 50 by
paired
selecting “Connect” on the smart device.
Under Sleep Mode, for a previously device, one needs to put the iFi RETRO Stereo 50 into
•
unpaired
pairing mode by pressing the “Pairing” button.
•
iFi RETRO Stereo 50 can store up to 8 paired devices.
Smart devices (phone/pad) can also be connected to the iFi RETRO Stereo 50 using the USB input.
•
F o r i O S d e v i c e s , a L i g h t n i n g t o U S B C a m e r a A d a p t e r i s r e q u i r e d . F o r A n d r o i d d e v i c e s , a n O T G c a b l e
is required. The remaining process is the same as for a computer connected via USB.
•
Smart devices will require special audio playback softwave to offer DSD and High-Resolution audio.
# Currently, Hibiki and Onkyo HF player are available in the iTunes store for OS devices
#
i(iPhone/iPad).
For Android, USB Audio Player Pro will work with compatible devices.
8
Analogue audio source components
Connection method: RCA interconnect cables
Step 1:
AUDIO INPUTS
MC H i g h
MC
Low
MM / L in e 3
PHONO
21
Connect the audio RCA cables from the source component to the iFi RETRO Stereo 50's RCA audio
input.
Step 2:
S e l e c t t h e r e s p e c t i v e “ ” o r “ ” f r o m t h e “” s e l e c t o r .12INPUT
COAXIAL
OPTICAL
LRL
INPUT
3/Phono
2
1
Tip:
Input 3 is normally setup for connecting to a turntable. However, one can use the mode switch
•
a t t h e b a c k o f t h e u n i t t o c o n f i g u r e t h i s i n p u t t o b e c o m e a l i n e i n p u t w i t h 6 d B o f g a i n .
INPUT
3/Phono
2
1
• T h e e x t r a 6 d B g a i n ( f i x e d ) i s u s e f u l w h e n y o u a r e c o n n e c t i n g s o m e v i n t a g e e q u i p m e n t ( e . g . r a d i o ,
cassette deck) where the output is the classic standard of 0.7Vrms rather than the modern
standard of 2Vrms.
9
Turntable
Connection method: RCA interconnect cables
S t e p 1 :
Identify the input and set the mode switch on the iFi RETRO Stereo 50 for the cartridge used.
Cartridge
rated output
<0.75mV
0.75-3mV
>3mV
Line
M o d e S w i t c h
M C
Low
M C
High
MM
Line3
(+6dB)
Gain(dB)
62
50
38
6
RCA connection
MC
Low
M C H i g h
M M / L i n e 3
M C H i g h
M M / L i n e 3
M C H i g h
M M / L i n e 3
M C
L o w
MC
High
MM
L i n e 3
( + 6 d B )
M o d e S w i t c hR C A c o n n e c t i o n
Diagram
M C H i gh
MC
Low
M M / L i n e 3
PHONO
S t e p 2 :
M C H i g h
MC
Low
MC
Low
MM / L ine 3
PHONO
PHONO
M C H i g h
MM / Li n e 3
Pairing
PHONO
GROUND
MC
Low
MC
High
MM
Line 3
(+6dB)
Connect the audio RCA cables from the turntable to the iFi RETRO Stereo 50's Phono audio input connection
as illustrated in Step 1 above.
Pairing
PHONO
GROUND
MC
Low
MC
High
MM
Lin e 3
(+6dB)
Connect the Ground wire from the turntable to the iFi RETRO Stereo 50's “”P H O N O G R O U N D .
S t e p 3 :
Select the “” from the “” selector.3/PhonoINPUT
INPUT
3/Phono
2
1
10
The default Phono EQ curve is the RIAA.
•
If the precision Tone Control (10-click each side)is enabled, it can convert the default RIAA EQ to
•
various other EQ curves as follows:
EQBassTreble
CCIR/Teldec
Decca/EMI
Columbia
Bass
RIAA
DMM
Columbia/Decca
DMM
T r e b l e
RIAA
EMI
CCIR/Teldec
RIAACentreCentre
CCIR/Teldec-1clicks
Columbia -4 clicks-4 clicks
Decca-3 clicks-4 clicks
DMM+1 clicks-2 clicks
+5 clicks
N o t e : “ - c l i c k ” e q u a l s t u r n t h e d i a l t o t h e l e f t
“ + c l i c k ” e q u a l s t u r n t h e d i a l t o t h e r i g h t
When the mode switch is selected as Line (+6dB) input, no RIAA EQ is applied.
•
EMI-3 clicks+3 clicks
Stereophonic Microgroove LP Records
D i s p l a y N a m e
RIAA
CCIR 56Europe pre appx. 1962, Eastern Europe & Asia pre appx. 1975
Columbia
DECCA (FFSS)Decca & London, Deutsche Grammophon,
RIAA (DMM)*
EMI
* T h e R I A A ‘ D i r e c t M e t a l M a s t e r i n g ’ C u r v e i s n o t a s t a n d a r d E Q C u r v e . T h i s u n q i u e A M R ‘ C u r v e ’ w a s d e v e l o p e d s p e c i f i c a l l y t o c o r r e c t f o r
the commonly found bright’ and ‘metallic’ edge of DMM recordings.
Comments
Modern stereo LP playback curve
eg. Amiga, Eterna,Deutsche Grammophon and Melodiya
Columbia LP stereo
Archiv, Polygram, NAB, Philips, and Argo
Corrects for the hard, metallic sound from DMM
Angel Records, Manhattan Records, Narada, labels under
Caroline Distribution, Mute, IRS, Liberty and Stateside
(there may be others too)
11
Tone Controls
Bass
TONE
T r e b l e
Direct
Input
On
Off
The iFi RETRO Stereo 50 incorporates a +/- 8dB precision studio-grade tone control. The tone control system
can be bypassed by the Direct switch:
T i p :
•
This tone control system has been engineered with utter transparency; one should not hear a significant
difference with the Direct switch On or Off if the tone control themselves are at their neutral position.
This tone control system can be used to recreate a number of additional EQ curves for vinyl record playback,
•
please refer to the: Turntable section for more details.
On = Direct On, tone control system bypassed.
Off = Direct Off, tone control system is enabled.
X
Bass System®
Bass
●●●●
Maximum Bass correction (Recommended when the LS3.5 is used with speaker stands).
Moderate Bass correction (Recommended for LS3.5 under normal setup).
-
OFF
T i p :
Sonically-damaging DSP is NOT used for either XBass nor 3D HolographicSound® systems. It uses the
•
highest-quality discrete components and so the integrity of the original recording is retained. Hence all the
clarity and resolution of the original music is retained.
For use with the iFi Retro LS3.5, it is recommended to set the XBass to the following configurations:
•
1. If the iFi Retro LS3.5 loudspeakers are placed on speaker stands in free space, use the setting.
2. If the iFi Retro LS3.5 loudspeakers are placed on a console or in an open shelf, use the setting.
•
The iFi Retro LS3.5 speakers are designed with the XBass function of the Retro Stereo 50 as part of the
overall frequency response, hence it is recommended to at least use thesetting for the maximum sound
●
“ ”
●●●
“”
●
“ ”
quality.
3D HolographicSound System®
For narrow (<1.5m apart) speaker placement.
●●●●
For Normal Use (Recommended).
-
OFF
12
T i p :
•
The 3D HolographicSound® system for Speakers and Headphones corrects a fundamental flaw in the
#
stereophonic recording process, which distorts the presentation of space and instruments with the
recording space. Both speakers and headphones are affected, however in different and one may say
opposite ways.
•
The RETRO Stereo 50 implements the required corrections for both Headphones and Speakers in the form of
iFi 's 3D HolographicSound® matrix analogue signal processing, specially and separately optimised for
speakers and headphones. This feature is of benefit to all speakers by improving the focus and clarity of the
sound stage and to headphones by reducing or eliminating "in head" localisation.
•
The changeover is automatic, with speakers playing, 3D HolographicSound® for speakers is selected; with
headphones playing (headphones plugged in), 3D HolographicSound® for headphones is selected.
•
The 3D HolographicSound® system can also be used to expand the sound field to improve the sense of width,
height and depth for greater listening pleasure or to compensate for sub-optimal speaker placement.
•
3D HolographicSound® system for Speakers
-
Direct - use for recordings made with similar corrections as 3D HolographicSound® (rare)
●
3D Correction only - for typical speaker situations (e.g. HiFi speakers in a normal listening room)
●●●
3D Correction and 3D expansion - for narrow speaker situations (e.g. desktop speakers beside the
computer monitor)
•
3D HolographicSound® system for Headphones
-
Direct - use for recordings made with similar corrections as 3D HolographicSound® (rare) or Headphones
with built-in correction
●
3D Correction only - for normal Headphone listening with most recordings
●●●
3D Correction and 3D expansion - for recordings or headphones with too narrow rendering of space
•
Please note that the above settings are guidelines, feel free to try and find the optimal settings that suit your
environment, recordings and Speakers/Headphones.
•
For use with the RETRO LS3.5, it is recommended to set the 3D HolographicSound® System to the following
configurations:
1. If the distance between the speakers is less than 1.5m, use the “” setting.
2. If the distance between the speakers is more than 1.5m, use the “ ” setting.
●●●
●
#
At the dawn of stereo recording in the 1930s, a fundamental problem was documented by the 'father' of
stereo sound recording – Alan Dower Blumlein. Due to the shape and size of the human head, stereo
separation is greater at high frequencies than it is at low frequencies due to the crosstalk between the two
ears at low frequencies.
A similar problem was found in the late 1950's by Ben Bauer for headphone playback of stereophonic
recordings, however here the problem was the excessive separation of low frequencies by the two separate
"on/in ear” transducers producing a sound field stuck in the listener’s head. With hindsight it is clear this is
the exact flip-side of the problem documented by Blumlein.
Despite this problem being 'known' for 80 Years (or over 50 Years for headphone listening), very few
recordings and no playback system compensate for this issue and little research has been conducted on how
to correct this.
The 3D HolographicSound® System corrects the above issue by applying the correction separately for
Speakers and Headphones (which need different and opposing corrections) and hence it is recommended
to at least use the “ ” setting for the most accurate sound stage reproduction.
●
13
Loudspeaker Outputs
Connection method: Loudspeaker cables
S t e p 1 :
RIGHTLEFT
SPEAKERS
4 - 1 6 O h m
Connect the left LS3.5 loudspeaker to the LEFT SPEAKER output on the iFi RETRO Stereo 50 and vice
v er sa .
Tip:
•
Normally is it preferably to decouple the loudspeakers from the shelf/desk they are placed on.
It is recommended to place the speakers at ear-height, with around the same distance between
•
them as the distance to the user.
iFi has included the following for proper decoupling:
•
1. anti-slip mat
2. silicon rubber feet
•
Please select your preferred decoupling item. The silicon rubber feet are usually used when
the LS3.5 is positioned on its side, so the silicon will raise the LS3.5 to the same height as the Stereo
5 0 A m p l i f i e r f o r a m o r e c o h e r e n t l o o k a n d f e e l .
•
Depending on the positioning of the 2 loudspeakers, please experiment with XBass and 3D
HolographicSound for the best sound. Please refer to the “XBass” and “3DHolographicSound”
s e c t i o n s f o r m o r e d e t a i l s .
The loudspeaker grille is acoustically transparent, attached by magnetic force and is replaceable.
•
•
The included loudspeaker cables are made of very high quality silver-plated OFHC copper with
T e f l o n i n s u l a t i o n f o r t h e b e s t s o u n d .
14
Headphone Outputs
The iFi RETRO Stereo 50 has two headphone outputs (Normal and Turbo) to suit different
headphones:
3.5mm socket (normal drive): connect normal sensitivity headphones and In Ear Monitors (IEMs)