Powersoft K20 Specifications

K20

2-Channel Power Amplier for High-Performance Touring

®

▶ Subwoofers

▶ High-power LF drivers

in

▶ Large-scale touring systems

for

▶ Stadiums

▶ Open-air events

▶ Arenas

▶ Large concert halls

The K20 is the strongest model in
the agship K Series and probably the
world’s most powerful amplier at its
size. Ideal for subwoofers and low­frequency devices requiring relatively
high continuous power and ample
headroom, the K20 is the unique
result of smart design, attention to
sound quality, and extremely high
efciency with reliability, portability, and
adaptability in mind.

Like all K Series models, the K20 is
designed for, and absolutely stable with,
2 Ω loads, further reducing the number
of amps required to power a specic
system.

Such enormous power density in a single
19” rack unit weighing as little as 12
kg/26.5 lb and running off a single mains
phase is only possible due to unique
Powersoft technologies, resulting in a
remarkably high efciency exceeding
85%.

Better still, the K20 can be equipped,
at the factory or anytime later, with an
optional state-of-the-art DSP board
for extensive sound management
functionality. IIR/FIR lters, safety
features like TruePower™ limiting
and LiveImpedance™, as well as the
convenient Active DampingControl™
are intuitively manageable with the free
PC software Armonía Pro Audio Suite™
via standard RS485 communication port.

2-channel mode mono-bridged mode

2 Ω / Ch 4 Ω / Ch 8 Ω / Ch 4 Ω / Ch pair 8 Ω / Ch pair

9,000 W 5,200 W 2,700 W 18,000 W 10,400 W

EIAJ Test Stan dard, 1 kHz, 1% THD

 Legendary Powersoft efciency:

▶

Unequaled Class D design with xed switching frequency

▶

Universal switch mode power supply with PFC (Power Factor Correction)

▶

Space and weight saving: only one rack space (1 RU) and 12 kg/26.5 lb

▶

Green Audio Power®: more amplier output power from the AC mains
power distribution due to >85% efciency

 Outstanding performance and operational safety:

▶

Ecellent sonic quality by design, including amp clip limiters and patented
ripple cancellation network

▶

Numerous amp/system/venue parameters can be congured, locked, and
monitored; i.e. AC mains voltage/current draw to protect from breaker tripping

 Communication:

▶

Fully digitally controlled amplier providing feedback of status information

▶

RS485 serial communication port standard on board, for amplier control
and monitoring via Armonía Pro Audio Suite™ software

▶

Proven reliability, yet downloadable log le of all functional fault events with

1)

time-related trace

 Practically versatile:

▶

Mono-bridgeable amplier channels; switch for linking analog signal inputs

▶

AC inrush current limiting; channel output voltage limiting

▶

Digital gain attenuator for gain/sensitivity selection

 Front panel interactive LCD display for local access and conguration
 Front panel SmartCard reader/writer for rmware updates and preset storage
 Front-to-rear air ow cooling with variable-speed fan, temperature controlled
 Full protection circuitry: over/under AC voltage; troublesome signals (clipping,

VHF, long-term RMS); DC; thermal; shor t circuit; mute at power on/off

 Full four years warranty
 Options & accessories:

▶

Smar tCard, for rmware updates or preset storage

▶

Armonía Pro Audio Suite, free at www.armoniasuite.com

▶

Power Control Hub, RS485 distribution and remote Power-on unit for up
to eight K Series ampliers, 19”/1 RU

▶

KDSP Board, for DSP integration:

-

Optional top-grade DSP with high dynamic range and extensive feature set

-

Separate input/output EQ’s with numerous lters of various types up to
48 dB/oct (IIR), linear phase (FIR), and hybrid (FIR+IIR)

-

Sophisticated limiter system comprising peak, RMS voltage, RMS current,
and TruePower™ limiting

-

Speaker wire compensation with Active DampingControl™

-

LiveImpedance™ load monitoring with regular musical signal

-

1)

1) Serial communica tion is relatively slow ; hence , max 4 amps can be monitored simultaneously, and information

AES3 digital audio signal input via XLR

▶

KAESOP Board (Ethernet/AES3 inter face)

is reduced, e .g. no si gnal level metering.

powersoft_k20_data_en_v2.5

K20

2-Channel Power Amplier for High-Performance Touring

Specications

General

AC Mains Power

Thermal

Audio

DSP (optional)

Front Panel

Rear Panel

Construction

Number of channels 2
Output power stereo mode mono-bridged mode

EIAJ Test Stan dard, 1 kHz, 1% THD 2 Ω/ch 4 Ω/ch 8 Ω/ch 4 Ω 8 Ω

Max output volta ge / current 225 V

Power supply Universal, regulated switch mode with PFC (Power Factor Correction)
Operating voltage 100-240 V ±10%, 50/60 Hz
Power fac tor cos (
Consumptio n / curre nt draw @ 230 V @ 115 V
Idle 88 W 1.17 A 90 W 1.15 A
I/8 of max out put power @ 4 Ω 1,625 W 7.9 A 1,625 W 15.8 A
I/4 of ma x output power @ 4 Ω 3,250 W 14.7 A 3,250 W 29.3 A

Environmental operating temper ature 0° - 45° C / 32° - 113° F
Thermal dissipation Fan, continuously var iable speed, te mperature con trolled, fron t to rear air ow
Idle 682 BTU /h 172 kcal/ h
I/8 of max out put power @ 4 Ω 1,590 BTU/h 402 kcal/h
I/4 of ma x output power @ 4 Ω 2,498 BTU/h 631 kcal/h

Gain, selectable 26 dB 29 d B 32 dB 35 dB
Input Sensitivi ty @ 8 Ω 7.37 V 5.22 V 3.68 V 2.62 V
Max input level 27 dBu 24 dBu 21 dBu 18 dBu

Gate -52 dBu -55 dBu -58 dBu -61 dBu

Frequency response 20 Hz - 20 kHz (1 W @ 8 Ω, ±0.5 dB)
S/N ratio (amp lier section) >110 dBA (20 Hz - 20 kHz, A weighted)

Crosstalk separation > 66 dB @ 1 kHz

Input Impedance 10 k Ω balanced
THD+N /SM PTE IMD/DIM 100 IMD <0. 5% from 1 W to full power (typically <0.05%)
Slew rate 50 V/µs @ 8 Ω, inpu t lter bypassed
Damping fac tor @ 8 Ω >500 0 @ 20-200 Hz

A/D converter
D/A converter
Memory 8 MB (R AM) plus 2 MB (ash for presets)

Presets 50 stored lo call y + 150 stor ed on a smar tca rd

Digit al audio inpu t AES3 (glitchles s fall back to analog audio selectable)
Delay for time alignment up to 4 s on the input sec tion, up to 32 ms per outpu t, sample-by-sam ple stepping
Crossover lters But ter wor th, Link wit z-R iley, B essel, Ar bit rar y Asymm etr ic, 6dB/oc t to 48dB/oc t (II R), lin ear phase (FIR), hy brid (FI R+IIR)
Output equalizer 16 fully parametric lters per cha nnel, IIR: peaking, hi/lo shelving, hi /lo pa ss eq , band pass, band s top, all pass. Custom F IR

Input equalizer Three layers (PEQ, raised cosine , shel ving ), 32 lters each + group lter s, up to 256 lter s per channel
Cable compensation net work up to 2 Ω neg ative/pos itive wire compe nsation (Ac tive DampingContr ol

Limiters

Indicators 7 meter LEDs: 5 x green, 1 x yellow, 1 x re d, top yellow a nd red show al arm w ith protect descri ption on LCD panel

Controls

Power swi tch

Network dat a por t AESOP incl. AES3 2 x RJ45 wit h activi ty LE Ds

Maintenance

Audio signal input connectors

Loudspeake r output connectors 2 x Neutrik® Speakon N L4MD
Network dat a por t RS4 85 1 x RJ45 with 2 recessed rotar y encoder s for ID s elec tio n

Aux volt age 1 x 2-pin Phoenix P. 3.81mm

AC main s
Controls

Dimensions W 483 mm / 19”, H 44. 5 mm / 1 RU, D 475 mm / 18.7 ”

Chassis 1 mm / 0.04” ste el cha ssis a nd removable dust cover ; 3 mm / 0.12” steel fr ont panel, s crew h ole pr otec tion, side

Weig ht

φ) >0.95 @ >50 0 W

9,00 0 W 5,200 W 2,700 W 18,000 W 10,400 W

Dual 24bit 96 kHz Tandem® archi tec ture with 127 dBA of dynamic range and THD <0.0 05% (20 Hz - 20 kHz)
Dual 24bit 96 kHz Tandem® archi tec ture with 122 dBA of dynamic range and THD <0.003% (20 Hz - 20 kHz)

up to 384 taps @ 4 8 or 96 kHz

Power limite r (TruePower™, RMS vol tage, RMS current) + Peak Limiter

4 pushbut tons , function depending on user menu
Mains switch

Smar tCard re ader/writer for  rmw are u pdates and preset storage. E asily acce ssible dust l ter foam be hind two steel cover s

Analog: 2 x balanced Neutrik® Combo XL R female/1/4” jack; AES3: use channel 2 XLR

AMP CPC 45A on rear panel; A MP CPC 45A conn ector mounted on a 3 x 5 mm
1 x link switch, lin king analog inpu ts 1 and 2; AES3/analog input switch

reinforce ment & rear support
12 kg (26. 5 lb)

peak

/ 125 A

peak

TM

)

2

(10AWG) cable

Powersoft • Via Enrico Conti, 5 • 50018 Scandicci (FI) • Italy

[phone] • [e-mail] • www.powersoft-audio.com

Data is subjec t to change with out notice.
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