• Skip to main content

Soulution

Nature of sound

  • 7 Series
    • 787 turntable
    • 760 DAC
    • 757 deemphasis pre
    • 727 pre
    • 717 stereo / mono
    • 701+ & 711+ Upgrades
  • 5 Series
    • 560 DAC
    • 550 phono
    • 525 Pre
    • 511 Stereo / Mono
  • 3 Series
    • 360 DAC
    • 350 phono stage
    • 331 integrated
    • 326 preamplifier
    • 312 stereo amplifier
  • About
    • Reviews
    • Distributors
    • Downloads
  • Deutsch

717 power amplifier

What a difference control makes!

soulution’s new reference power amplifier drives all loudspeakers and sets new benchmarks in terms of noise, phase errors, common mode rejection and distortion.

Key Features

  • Switched mode power supply (4 × 600 VA , 4x 2’100 VA peak)
  • Impulse current rating of more than 400 Ampere
  • Minimal phase change (<0.2° @ 20kHz) in audio band
  • Ultra low noise circuit < -165dBV (input related noisedensity)

Highlights

Layout
The 717 power-amplifier (including the power supplies) was designed to be entirely dual-mono in its layout. The left and right channels each have their own PCB and are thus completely separated from each other. This results in much better channel separation (> 130 dB) than with previous models.

Input stage
The innovative input stage of the717 power-amplifier enables exceptional common mode rejection without compromising the input stage by introducing noise. This is achieved with parallelized instrumentation amplifiers designed for wide bandwidth (20MHz), lowest noise and optimal common mode rejection (CMMR >105dB). This ensures that even the faintest musical signals can be properly received by the 717 power-amplifier.

Voltage stage
For all amplifier designs with negative feedback more loopgain is better than a lot, provided that the design remains stable. With its bandwidth of more than 2 MHz, a loopgain of more than 120dB (DC) and its ultra linear feedback network the 717 sets a new benchmark in terms of phase coherence and distortion.

Current stage
The current amplifier stage features 16 power transistors per channel working in Class AB. A smart bias current control circuit measures the instantaneous current of each single transistor and controls its idle current ensuring optimal and identical operating conditions. The 717 combines outstanding micro dynamics with impressive raw power delivery. Short current pulses of 400A and more are readily attainable. For safety reasons the continuous current output is limited to 32Arms per channel.

Power supply
Four ultra-high peak-power switched (2’100W for 5 sec.) mode power supply modules provide the power for the rail voltages of the output stage. The output impedance of the regulated supply remains ultralow over the relevant frequency range which renders big storage capacitors redundant. Distributed local power supplies, with highly efficient DC-DC converters and extremely low-noise and fast linear regulators right next to the sink, power the small signal section of the 717. This ensures lowest noise and shortest signal paths for the small signal section.

Specifications

Mains
100– 240 V (50 – 60 Hz)
Power consumption< 0.5 W standby
idle 300 W
max 1600 W
Outputs 2 pairs Cu-terminal,
gold plated
Gain+ 26 dB
Power output2 × 150 W @ 8 Ω
2 × 300 W @ 4 Ω
2 × 600 W @ 2 Ω
Pulse power> 2 × 6000 W
Frequency response (– 3 dB)0 – 2 MHz
Phase response (@20kHz)< 0.2°
THD + N< 0.001% at 50 W @ 4 Ω
(20 Hz – 20 kHz)
Signal-to-noise ratio108 dB (5 W @ 1 kHz)
Spot noise (input related)< 165 dBV/sqrt(Hz), 20Hz - 20kHz
Channel separation> 120 dB @ 1 kHz
Damping factor> 10 000
Output current max32 A (limited)
Inputs2 × balanced (XLR)
Input impedance4.4 MΩ balanced
Dimensions480 × 350 × 505 mm
(W × H × D)
Weightapprox. 50 kg
LINK (remote turn-on)12 V control signal
  • Downloads
  • Facebook
  • Imprint
  • Privacy policy
  • Cookie Policy (EU)

© 2025 · soulution · SPEMOT AG · Dulliken, Switzerland · e-mail: info@soulution-audio.com

Manage Cookie Consent
To provide the best experiences, we use technologies like cookies to store and/or access device information. Consenting to these technologies will allow us to process data such as browsing behavior or unique IDs on this site. Not consenting or withdrawing consent, may adversely affect certain features and functions.
Functional Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
Statistics
The technical storage or access that is used exclusively for statistical purposes. The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
Marketing
The technical storage or access is required to create user profiles to send advertising, or to track the user on a website or across several websites for similar marketing purposes.
Manage options Manage services Manage {vendor_count} vendors Read more about these purposes
View preferences
{title} {title} {title}