DTA
Digital to
Processor
OWNER’S MANUAL
DTA 1
Digital
Processor
OWNER’S MANUAL
Thank you for purchasing the Soundstream
.
You now own
the finest automotive Digital to Analog processor made, a precision
component with audiophile performance.
For maximum performance, we suggest you take a few moments
to read through this manual, to better acquaint yourself with the
design features and capabilities of your new
.
This Soundstream product is the result of the combined efforts of
Krell Digital and Soundstream Technologies. It is made with
American craftsmanship and the highest quality control standards, to
provide you with many years of listening pleasure. To further help
protect your investment and to aid us with service questions, please
fill in and retain the following requested information:
Figure
l
level Analog Output Stages to amplify the analog signals
coming from the
This Krell preamplifier has all-discrete,
Class A outputs that feature low-output impedance to drive long
cable runs. The design also includes a modified version of Krell’s
proprietary home audio grounding system, with separate analog
power supply to insure minimal digital signal crosstalk. With it
you’ll hear cleaner, more transparent music reproduction without
annoying low-level digital artifacts.
Model Number:
Serial Number:
Dealer’s Name:
Date of Purchase:
Date of Installation:
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Three Inputs with Priority Switching for connection to digital
input signals. One input uses an Optical connector for interface to
industry-standard fiber-optic cable in lieu of coaxial cable. The
other two inpuk connect to standard 75 ohm coaxial cables ter-
We’ve designed the
(as shown in Figure 1) to be an audio-
DESIGN
FEATURES
phile replacement for the standard digital to analog (D/A) proces-
sors found in many of today’s mass-marketed, CD and DAT mobile
components. When you bypass your source’s D/A circuits and route
,
minated with RCA connectors. The
is compatible with CD,
DAT, and the new DCC digital cassette formats at both 44.1 and
48
sampling frequencies. Through clever sensing circuits, the
will automatically choose the Optical input as the source
whenever a signal is present at that connection (as explained in
the Installation section). Similarly, for the 75 ohm inputs, input 1
has priority over input 2. Switching between sampling frequen-
cies is transparent.
the digital output to the
your mobile audio system will be
greatly enhanced by these features:
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Digital Processor with 8x Oversampling Digital Filter
this high-performance processor resamples the incoming digital
signal to create an 8x oversampled, 1 datastream. With 8x
oversampling, more data points are added to create a more accu-
rate waveform. This allows the use of a simpler, better-sounding
analog filter at the converters’ outputs, for precise analog signal
reconstruction.
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Quality Construction -we use only premium parts to build each
including double-sided masked glass epoxy circuit boards,
polypropylene capacitors, gold-plated RCA input/output connec-
tors, and a rugged heavy gauge steel enclosure.
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Hybrid Digital to Analog Conversion
System our unique
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the
location inside the vehicle with four sheet metal screws. The
obtains power from the standard Vdc automotive electrical
system and uses the audio system’s remote turn-on voltage for cir-
cuit activation. Once installed, the operates automatically
without any need for adjustments or controls.
can be mounted in any convenient
combination of traditional, oversampled “ladder” and newer
“1 -bit” DAC technologies. Resampled data is split up and han-
dled by two separate converters per channel, working in parallel.
The result is an accurate analog conversion with the lowest possi-
ble noise and distortion specifications.
Wiring Layout
In general, you should plan to connect the
CONNECTIONS
between the digital
source and the control head unit, as shown in Figure 3. If you are
using an equalizer or active crossover, be sure to insert the
the chain before any of these components.
in
Determine how your vehicle’s wiring is laid out, and plan to run
your new wiring along the same routes. sure to keep power wires
away from audio signal wires. (NOTE: Wires containing audio
signals can cross a power wire, but not run alongside it.)
You can route the new wires under the carpeting, but make sure
they do not interfere with the vehicle’s normal operation. Keep all
Figure 3
Figure 2
Power Connections (Barrier Strip)
Remote: Connect to control head unit remote turn-on.
Ground: Connect to Chassis Ground.
Electronic Crossover
Connect to
power to
Digital Inputs
Optical: Fiber-optic
Vdc. An adjacent LED indicator confirms
.
First Digital Input.
1:
2:
RCA coaxial
RCA coaxial
Second Digital Input.
Third Digital Input.
Analog Audio Outputs
Left: RCA audio Analog Left Output.
Right: RCA audio jack Analog Right Output.
Speakers
Channel
Automotive sound system installations can be tricky, especially for
first-timers. For this reason, we recommend using o professional
installer, who has the tools and, more importantly, the experience
to do the
right. If you decide to install the equipment yourself,
we hope this manual will serve as a helpful guide.
Aftermarket Source Unit
(CD, DA J or
Player)
Recommended Signal Cables
The
of the available 3 digital audio connections. For best analog signal
transfer, we recommend using Stereo Audio
uses custom gold-plated RCA
for analog and 2
Cable, Streamline Audio Cable, or an equivalent premium cable.
For digital audio connections, use a precision flexible 75 ohm
cable like Soundstream’s
1, 75 ohm Interconnect Cable, to
Subwoofers
insure accurate transmission of digital signals.
7. Connect another (e.g., orange or aqua) wire from the Remote
terminal to your control head unit’s remote turn-on connection.
wires inside the vehicle, hidden from passengers. An exposed wire
can inadvertently be pulled out, and may cause disconnection or
shorting.
NOTE: This connection enables the
to follow a timed sequence
for minimal turn-on and turn-off thumps and is required for circuit
activation.
location and Mounting
The
is compact in size and it generates virtually no heat. It
can be located almost anywhere within the passenger compartment,
8. Connect a red wire (18 gauge) from the
0.75 A in-line (fast-blow) fuse, to a constant
that it is “hot” even when the ignition is off. Try connecting it to the
battery cable itself, or tapping into a power lead on the control
head unit (see Figure 3).
terminal through a
Vdc source, so
trunk, or storage area. However, do not install the
in the
engine compartment or in any outside location exposed to dirt and
moisture.
Use the
the
as a template to mark drill holes. Before mounting
to your vehicle’s chassis, inspect the site for any hidden
DTA 1 Operation
brake or gas lines, wires, or cables.
9. Turn on your control head unit, selecting a source connected to the
and slowly increase the volume while listening to a familiar
musical selection. With proper instollation, your
After selecting a suitable location, mount the
form the following connection steps:
,
and then per-
should pro-
vide you with an increased sense of transparency and music repro-
duction. There are no adjustments or controls.
Connecting Audio Signal Cables
1. Make sure power to your audio system is off.
NOTE: If you experience problems at this point, review the installa-
tion steps and check all your connections. If you are installing the
2. Locate the Digital Output connector on the back of your CD or
DAT control head unit.
as part of a new system, try leaving the
out of the chain
until you get your entire system operating properly first. Then repeat
3. Connect an appropriate length of RCA coaxial cable from the
steps 1 through 8 to insert the
system chain.
once again into the audio
source’s digital output to digital 75
NOTE: If you use an optical link, connect an appropriate length of
the Optical input
input 1 on the
fiber-optic cable from the source’s digital output
on the
ber that the
.
However, if you are installing a second source, remem-
uses automatic priority switching to select signals
Your
is protected by a limited warranty. Please read the
enclosed warranty information carefully. Should any problem occur,
contact your local Soundstream dealer.
at Optical input over those present at the 75 ohm inputs, 1 or 2.
Also, input 1 has priority over input 2. However, CD players not
equipped with o Remote On/Off control will continue generating
digital sync code which will be sensed by the
of player is part of your installation, we suggest connecting
unit to a lower priority input via RCA cables.
If this type
8x Oversompling,
32 44.1
5 Hz to 20
hybird
SPECIFICATIONS
Sampling Frequency
Frequency Response
48
0.25
4. Repeat steps 2 and 3 to connect an additional CD or DAT control
head unit.
A-weighted
S / N
Dynamic Range
THD
96
5. Connect an appropriate length of high-performance stereo RCA
audio cable from the Left and Right analog audio outputs on the
to the CD or Aux input of your head unit or preamp in your
mobile system chain (see Figure 3).
20 Hz to 20
Channel Separation
Minimum Recommended Load
output
1
2Vrms
Connecting Power Wires
6. With power still off, connect a black wire (18 gauge) from the
Ground terminal to a good chassis ground (e.g., bare metal or bolt,
not painted or coated).
Dimensions
6
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