Much more than a sum of its parts, the new DP548 dynamic management
takes the features of the 4 Series products and adds the equivalent
of four D2 dynamic equalisers across the inputs and four units'
worth of C2 compressors across the outputs (8 individual channels),
along with a new matrix mixing mode.
All the original features and sound quality of the 4 Series
are preserved and expanded upon using a newer DSP platform,
and with some never before seen ground breaking features in
AudioCore, it all makes for a new dynamic combination...
It's a long list to cover, but for
those who have never used a 4 Series unit, there is a formidable
array of tools availble to cater for your creative as well
as your control/corrective needs.
Each input has a 28 band graphic EQ that can be configured
to model either our own GQ600, or older inductor based designs
such as the DN27.
There are an additional 8 bands of "traditional"
parametric EQ on each input.
All parametric sections can be reconfigured to many alternate
filter behaviours, including the familiar high and low shelves
and notch filters, but along with bandpass, elliptic and
variable 'Q' shapes, and phase adjustment, in 2 degree steps.
On top of all this EQ that you might be used to comes the
incredibly powerful dynamic EQ. Three bands of SiDD's dynamic
EQ are available on each input, with all four modes of operation
supported (so, cut/boost either above or below the threshold).
Each band will cover the full 20-20k range and has controls
for envelope (attack/release) as well as setting the maximum
allowable amount of gain adjustment and choosing the "strength"
of the effect (the ratio in dynamics terms).
Dynamic EQ may be stored in its own memories, as can graphic
EQ settings, all other input settings or all output settings,
and every combination of these if necessary!
Considering how daunting this could be, and it is all still
editable via the front panel, AudioCore opens up the dynamic
EQ ediitng in an incredibly intuitive manner.
Have a look at the TechBlog post to see some screenshots and
a video of the real- time EQ curve adjusting to the incoming
Routing inputs to outputs is as flexible as ever with any
input or combination of inputs being switchable to any output,
and there are various useful templates to get you started
(along with default crossover points to help).
The DP548 also supports a full matrix mixing mode where inputs
may be mixed in any ratio to any outputs with four "sends"
being available on each output channel instead of just switching
Looking at output sections, the requisite crossover filters
offer slopes from 6dB/Octave up to 48dB/Octave. Nine more
bands of parametric EQ follow and then we have a a choice
of dynamics useful for protection or for creative use.
Before the limiter sections there is now a fully featured
compressor with variable knee to turn it from a safe corrective
tool with hard knee to a gentler (but still with a high ratio
if required) effect that only makes its presence felt gradually
as the threshold is approached and exceeded.
Each output also features a combination of limiters - a limiter
designed to protect individual drivers from over-heating,
and an additional look-ahead "D-Max" limiter for
added safety and to prevent driver over-excursion.
Add to this sub-millimetre accuracy when introducing time
alignment with completely flexible ganging of all channels,
and it can be seen that the DP548 will fit the bill in any
To give you a few ideas of how you might use the unit, we
have compiled some suggestions here.
Inputs Electronically balanced (transformers optional)
AES/EBU (selectable) fitted as standard to all Series 4
Impedance >10k ohms
CMRR >65dB 50Hz - 10kHz
Outputs All electronically balanced (transformers optional)
AES/EBU fitted as standard to all Series 4 units
Source Imp < 60ohms
Minimum Load 600ohm
Maximum Level +20dBm into 600 ohm load
Sampling Rate DP548 – Up to 96kHz internal, up to
192kHz can be accepted and converted.
Frequency Response ±0.5dB 10Hz - 32kHz
Dynamic Range >116dB 20Hz -20kHz. Unwtd
Distortion < 0.001% @ 1kHz, +10dBm
Maximum Delay 650 mS. (increment 0.325 µs steps)
Output gain Adjustable +15dB to -40dB in 0.1 dB steps and
Filters Parametrics - 8 Per input / 9 per output
Additional filters 28-band graphic on each input
Each parametric can be switched to Bandpass, Allpass, Notch,
VariQ, Shelf and Elliptical response
Phase filtering - 2 degree steps on each input and output
Bessel / Butterworth 6/12/18/24/48dB per octave
and Linkwitz-Riley 12/24/48dB per octave
3 bands per input
Parametric behaviour - 19.7Hz - 32kHz
'Q' 0.4 - 128,
Max gain automatic gain adjustment 18dB
Max ratio (cut above mode) 4:1
Max ratio (all other modes) 2:1
Attack 70uS - 2.0 Seconds
Release 11mS - 3.4 Seconds
One per output
Max ratio 16:1
Variable knee - 12 steps + Off (Hard)
Attack 70uS - 2.0 Seconds
Release 11mS - 3.4 Seconds
Mix matrix mode:
Input sends to each output continuously variable from -40.0dB
to _15.0dB in 0.1dB steps plus OFF,
Threshold +22dBu to -10dBu
Attack time 0.3 to 90 milliseconds
Release time 4, 8, 16 or 32 times the attack time
Clip/D-max Limiter :
Look-ahead attack time,
Fast, Medium or Slow release times
Inputs 3 pin female XLR
Outputs 3 pin male XLR
RS485 In/Out XLRs
RS232 9 Pin (Female) D Connector
Power 3 pin IEC
Power 60VAC - 240VAC
Consumption < 40 watts
Weight 3.5kg. Net (5kg. Shipping)
Size 1.75”(1U) x 19” x 12” (44 x 482 x
305mm) excluding connectors
Due to continuing product improvement the above specifications
are subject to change.