SRP 600

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The SRP 600 is a new near field active reference monitor. This SRP adds loudness, clarity and bottom end to the compact SRP 500. The enclosure is pressure die cast aluminum that maximizes rigidity and lends it a unique form. The silk dome tweeter is nested in a custom waveguide to produce on and off axis linearity and a wide, detailed soundstage. The 6.5" kevlar woofer produces deep bass and exceptional transient response. A new 80 + 50 watt biamplifier drives the transducers optimally while providing adequate headroom and dynamics. The maximum SPL measures in at an impressive 108dB. DSP based internal processing with high quality ADC and DAC is employed for the crossover and also provides the 0.75dB step calibrated HF and LF room compensation EQs at the rear. On the front is a level control ranging from mute to +6dB with centre detent at 0dB. Tapped inserts at the rear and bottom allow for various mounting options. The SRP 600 accepts both XLR and TRS balanced inputs and is available in the following durable powder coat finishes: rich black, charcoal grey or snow white.


  • Rigid Aluminum die cast enclosure
  • Class AB: Biamplifier
  • 6.5" kevlar woofer
  • 1" HF in custom waveguide
  • Discrete EQ in 0.75 dB steps
  • Internal DSP balance


Product Literature: Sonodyne Reference Owners Manual: SRP 500, 600, 800


DESCRIPTION 2 way biamplifier speaker
ENCLOSURE Pressure die-cast aluminum, vented, through front-firing aerodynamic port
TRANSDUCER COMPLEMENTS: HF Magnetically shielded 26mm silk dome tweeter with custom waveguide
TRANSDUCER COMPLEMENTS: LF Magnetically shielded 6.5" kevlar cone woofer in die-cast chassis
MAX SPL @ 1M 107 dB
FREQUENCY RESPONSE 48 Hz ~ 21 kHz (+/- 2 dB)
USABLE FREQUENCY RANGE (-10 dB) 42 Hz ~ 25 kHz
CMRR >65 dB
INPUTS Fully balanced through XLR & TRS sockets
CONTROLS - FRONT Power Switch and Gain Control
CONTROLS - REAR Low shelving, High shelving, Bass roll-off
PROTECTION Over current, Overheat , RFI, Switch on/ off transients
GAIN CONTROL RANGE -70 dB ~ +10 dB, 0 dB at (detented) centre
HIGH SHELVING EQ 4 kHz ~ 20 kHz, -3 dB ~ +3 dB in 0.75 dB steps
LOW SHELVING EQ 50 Hz ~ 250 Hz, -3 dB ~ +3 dB in 0.75 dB steps
BASS ROLL-OFF 80 Hz, 12 dB/ octave
SIGNAL TO NOISE RATIO (AT UNITY GAIN) > 90 dB, referred to full output
FINISH Powder coated (grey/white/black)
DIMENSIONS (HxWxD) mm 340 x 250 x 240
POWER REQUIREMENT 230 VAC, ±10%, 50 Hz, 120 V optional
NET WEIGHT 11.9 kg
MOUNTING OPTIONS 2 x M6 inserts on rear, 4 x M6 inserts on bottom

* All specifications are subject to change due to continuous improvements

Set up your system

The following sketch shows an optimum set-up for a stereo system. The important part here is to place the speakers such that the head of the listener and the two monitors lie at the vertices of an equilateral triangle.

Figure 3: stereo set-up >

The following sketch shows a 5.1 set-up. It is recommended to have a symmetrical listening position with the front left and right speakers facing the listener and the surround speakers located at the back of the listener.

< Figure 4: Surround sound set-up

Distance from walls

While placing speakers, make sure that they are at least 40 cm away from any reflecting surface. This will help minimise bumps in the low-frequency response due to reflections, and also ensure that the rear-mounting port is unobstructed. It is also required to ensure that the heat sinks at the back have adequate ventilation, for uninterrupted operation.

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The Sonodyne SRP series is a no-nonsense entry into the sub-$1000 monitor scene, with five different models ranging from 3'' to 8'' in woofer size.

Touting an ultra-wide sweet spot with custom waveguides for the tweeters on each model, SRP monitors are enclosed in die-cast aluminum enclosures that eliminate vibration-induced coloration. They feature woven Kevlar cones, and Sonodyne claims they exhibit accurate transient and low-end response, despite their compact size. Having no prior experience with Sonodyne monitors, I was excited to take a listen.

I spent a few weeks with an SRP 600 pair mainly using them as a complementary set of monitors, as I'd loaned my NS-10Ms to another engineer and needed another set of monitors for referencing during some mix projects. Right off the bat, it was apparent that they are indeed articulate, and loud. I had to turn them down a bit to make them evenly matched with my Focal and my Auratone speakers. But aside from shear volume, the detail in the midrange was very pleasing.

After digging in a bit more and experimenting with both my own mixes and some of my favorite albums, from 300 Hz — 12 kHz, I felt like I was hearing a pretty darn accurate representation of the audio — particularly within the crucial 800 Hz — 2 kHz midrange. The manual specifies a usable frequency range of 42 Hz — 25 kHz, and I feel like for the most part that's true, which I didn't expect would be the case, given the size and cost.

When it came to actually making decisions with the Sonodynes, I first played a mix that I'd been working on for a few days, and a few things jumped out at me right away. I could hear that my vocal effects were clouding up the center of the image in both their positioning and their equalization — a welcome revelation. After switching back to my Focals, I found that it was the right call. There was also a guitar that was covering up the vocals with some overzealous 400 Hz. However, the biggest shock was I could hear the punchy ultra-lows (which I'll classify as 40-80 Hz for the purposes of this review), coming from these little monitors quite clearly. I went to work on those frequencies, as I'd noticed that they were an issue in my car earlier that day.

For all of the good things that the SRP 600 did to the midrange, I felt like 100-250 Hz was less impressive, but still very useful for ensuring that my mixes were translating with lesser systems. It should also be noted that this review was conducted entirely in one room, so your results may vary (especially in regards to frequency ranges that are affected most by nearby surface reflections). While the back of the speakers have equalizers that allow you to increase 50-250 Hz by up to 3 dB either way (and a separate EQ for the highs), I was happy with the representation up to 100 Hz, so I figured it'd be best to do any critical low-end adjustments on my usual rig that I know inside and out. After all, I was mainly evaluating these monitors by utilizing them as a complementary pair to my current setup, so revealing any flaws in my midrange was much more appealing to me than a fancy low register. It should be noted, however, that an unclouded low end allows you to really concentrate on your midrange, which was exactly what I'd been looking for.

Last but not least, I found the high end to be very serviceable — perhaps not as revealing as the midrange, but coming in a close second. You'll definitely know if you've got too much going on from 5 kHz up. I'd describe the response as being crispy — somewhere between the Genelec 8000 series and the Mackie HR824 [Tape Op #67]. In my time with the monitors, I didn't feel like I had to dial back the high end, but I wasn't really using them exclusively. Were they the only monitors I had to use, listening at extremely high levels would probably call for a slight adjustment.

The SRP 600 retails for $775 each, which is interesting, because I feel like overall, they sound a little more expensive than that. For me, the big thing is that they sound very different than what I'm used to, but in an entirely useful way, so I may have to buy myself (yet) another pair of speaker stands for my room. Monitors are a very subjective and finicky thing to nail down, so I fully suggest trying out several different pairs if you're in the market; just be sure to include the SRP series while you're at it.

Dave Hidek

Posted on: 9/21/2016

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