SRP 400

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Overview

The SRP 400 is the most compact active reference monitor in the new SRP line. It is an excellent reference to understand how mixes translate to smaller speakers. 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 4.5" CURV cone woofer produces impressive bass and transient response. A new 25 + 25 watt biamplifier drives the transducers optimally while providing adequate headroom and dynamics. The maximum SPL measures in at an impressive 100dB. Room compensation HF and LF tilts are available 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 400 accepts XLR and TRS balanced inputs and is available in the following durable powder coat finishes: rich black, charcoal grey or snow white.

Highlights

  • Rigid Aluminum die cast enclosure
  • Class AB: Biamplifier
  • 4.5" kevlar woofer
  • 1" HF in custom waveguide
  • High, Low Shelving EQs

Downloads

Product Literature: Sonodyne Reference Owners Manual: SRP 350 400 Product Literature

Specifications

DESCRIPTION 2 way nearfield active monitor
ENCLOSURE Pressure die-cast aluminum, vented, through front-firing aerodynamic port
TRANSDUCER COMPLEMENTS: HF Magnetically shielded 26mm silk dome with custom waveguide
TRANSDUCER COMPLEMENTS: LF Magnetically shielded 4.5" CURV cone woofer
AMPLIFIER POWER BEFORE CLIPPING LF: 25 W, HF: 25 W
AMPLIFIER THD AT RATED POWER < 0.1 %
MAX SPL @ 1M 100 dB
FREQUENCY RESPONSE 75 Hz ~ 22 kHz (+/- 2 dB)
USABLE FREQUENCY RANGE (-10 dB) 65 Hz ~ 25 kHz
CROSSOVER FREQUENCY 3.0 kHz
CMRR > 65 dB
INPUTS Fully balanced through XLR & TRS sockets
INPUT LEVEL FOR 90 dB SPL @ 1M -2 dBU
CONTROLS - FRONT Gain, Power
CONTROLS - REAR Bass tilt, Treble tilt
INDICATOR Power ON /OFF
GAIN CONTROL RANGE -∞ to +6 dB, 0 dB at center position
BASS ROLL-OFF 100 Hz, 6 dB/octave
SIGNAL TO NOISE RATIO (AT UNITY GAIN) > 90 dB, referred to full output
FINISH Powder coated (grey/white/black)
COLOURS Grey/ White/ Black
DIMENSIONS (HxWxD) mm 160 x 232 x 155
POWER CONSUMPTION 70 VA Max.
POWER REQUIREMENT 230 VAC, ±10%, 50 Hz; 120 V optional
NET WEIGHT 4.4 kg
WALL MOUNT BRACKET SRP WB1
MOUNTING OPTIONS 2 x M6 inserts on rear 4 x M6 inserts on base

* 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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Price
Quality
Overall
impressive little monitors!

disclosure:
I have no shares with Sonodyne, personally I know their marketing guy Aninda who works for Sonodyne. he sent me a pair of SRP400 to try them out at my location. I successfully used the Sonodyne SM100 AK 3 years back (and still do) and was pretty on fire about them.

introduction:
I got the SRP 400 4 weeks ago. They are very small sized boxes and fit on an office desk. Bi-amped, 4.5" bass driver with 25 Watts, silk dome 1" driver with 25 Watts. They are front ported, got an on off switch and a loudness attenuation switch. On the back you get an XLR and bass/treble tilt + bass rolloff (dip switches).

testing:
impressive, loud, tight comes to my mind. I was actually blown away by the sheer loudness these little guys can achive before they start to distort. My test were ranging from gold masters ACDC - back in black to modern stuff like destiny's child - say my name and pretty aggressive stuff like Crowbar - broken glass. Old Xzibit records and Bruce Springsteen.

I finally mixed a metalcore track on them switching between PSI M25 A, NS-10. I was able to get everything right after the second revision (and had to check on the M25 for the bass).

sound:
I never heard such a small box delivering sound in every range as balanced as on these speakers (always respecting their size! which is very small). They sound like modern NS-10 without the annoying fizz and lower mid-cut. the lower mids sound boosted (to compensate for the small size) but not in an annyoing way. No boxy-ness at all. The bass is super tight (altough you miss the lower octave due to the size). Compared to the M25 you have get a fair amount of the same deep information and width information. You get a very strong phantom mid with these small boxes so it seems they did a very good job over at Sonodyne to get the phase straight.

What I like the most with these small speakers is that I can take them with me, mixing/recording in other studios and feel like I have a strong reference with me (I did that twice now already and feel safe). I used them to monitor a live-recording on a metal gig 2 weeks ago. Fabolous.

the dynamics are impressive too. You can turn them all the way down and get the same balanced sound as if you turn them all the way up. Pay attention to their limited headroom when going full power. You can drive them all the way up and get no visual clipping led. You hear the artifacts very well (due to the good resolution of the speakers).

dynamics again: kicks, attack on snare drums are a very strong selling point on these little fukkers. You hear what you are getting. You can tune your compressor to get rid of the attack or if you don't have attack, make it sound right. They show off whats there!

Keep in mind that they are front ported so if you turn up the volume they are putting out a lot of air (without any noise on the port! again.. good job).


negative: I was not so happy with the loudness wheel on the front to adjust the loudness of the speaker. It's not clear where exactly the wheel is pointing at so you need good ears or a measuring tool to get left and right sound at the same level. That is only a small minus for me as I was able to dial that in easily.

At this price point there is no other speaker I tested that delivers that kind of sound for the money =>700 US$/pair. The sound/money ratio is impressive!

https://www.gearslutz.com/board/reviews/1021977-sonodyne-srp400.html

George Necola

Posted on: 9/2/2016

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