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Spatial Hologram M3 Triode Master Open Baffle Loudspeakers

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Spatial Hologram M3 Triode Master Open Baffle Loudspeakers

Spatial's Hologram series of loudspeakers incorporate a number of advanced design features that work together to achieve a more realistic reproduction of music than ever before.


Open Baffle Design

Eliminating the speaker box dramatically improves the sound of a speaker by eliminating all manner of box related resonances and re-radiation of sound from inside the box. A free-flowing ease and dimensionality is immediately recognizable as more like actual music and less hifi sounding. Bass is extremely detailed and realistic sounding, while the midrange is portrayed naturally, with an open, 3D presentation. The challenge of creating an open-baffle speaker with powerful bass is especially daunting - the Hologram series succeed in producing unprecedented bass performance (without DSP) in a compact form factor.


Point Source Design

A properly designed point source driver provides a coherent transition from midrange to treble and stable imaging by eliminating comb-filtering; the interference patterns found when the tweeter is physically separate as in most speaker designs. Hologram models exhibit phenomenal imaging and soundstaging.


Controlled Directivity Design*

Dispersion angle is limited to around 80 degrees and held constant across the spectrum, allowing less interaction with the room and much more even response in reflected field energy.


Ultra wideband Dipolar compression driver

A special suspension design allows a very low crossover point at 700 Hz, providing coherent, high definition reproduction through the midrange and treble region. Since most of the midrange is produced by the low mass compression driver instead of the cone driver, a dramatic improvement in resolution and reduced distortion is provided compared to conventional speaker designs. The dipolar radiation pattern provides and extremely expansive soundstage, while still maintaining proper scaling of instruments and voices.


High-efficiency Drivers

The use of very high efficiency drivers provides outstanding dynamic response without compression effects. The mid/tweeter's 108dB sensitivity essentially eliminates any compression distortion when used in domestic applications.


Linear Response

Uniform frequency response is critical to accurate music reproduction. Great care has been taken in voicing the speaker in the effort to reproduce natural pitch and tonal balance.


*Controlled Directivity Explained:

The idea with controlled directivity is to create a situation in the room where the frequency response shape (and therefore tonal balance) of the direct field is similar to the reflected field. In domestic listening environments, the walls and floor/ceiling boundaries are close to the speaker, so the manner in which the speaker interacts with the boundaries plays a determining role in the final sound quality in a given listening room. Concurrently, the reduced levels of reflected energy lowers the amplitude of room sound, increasing the ratio of direct to reflected field energy at the listening position.

Conventional box speakers with surface mounted mid and treble drivers typically have very uneven frequency response off-axis. Unfortunately, this uneven response pattern is being reflected off the boundaries, which is then mixed with the on-axis, direct radiation coming from the speaker. The summed response at the listener position is one of degraded quality compared to the direct field alone. Additionally, the reflected field energy is arriving later due to the extra distance traveled, causing a number of time domain related problems such as blurred imaging and poorly constructed soundstage projection. The sound also takes on the character of the room more than is desired, creating inconsistancy from one installation to the next. Loudspeaker manufacturers using the conventional approach really have no idea what their customers are hearing due to room interaction being such a large factor.

The best known way to address this problem is to employ controlled directivity principles, which are well known and highly developed in professional audio, such as in studio monitors and live sound applications. As applied to the home listening environment, this means that the dispersion angle is narrower and more consistent with frequency, with less energy hitting the side walls and floor/ceiling boundaries. We aim to produce an 80 degree pattern that drops off quickly beyond that point and has a frequency response shape close to the on-axis response. We can't eliminate energy bouncing off boundaries, but we can reduce the level, which increases the ratio of direct to reflected field energy. Then, the summed response at the listener position is similar to the quality one would expect in a near-field listening arrangement. This, in effect allows the listener to hear the speaker itself, instead of such a strong mix of the speaker and room.

We achieve broadband uniformity of directivity by controlling the radiation angle specific to the differing properties of bass, mid and treble. Open-baffle bass provides directionality in the bass region where the wavelengths are very long, the large mid cone controls the angle in the midrange by virtue of its size compared the wavelengths of the mids, while the same cone provides a waveguide function to the point source compression tweeter. The Hologram achieves these objectives in a surprisingly simple and compact package. 


M3 Triode Master Specifications


  • Type: 2-way, point source, open-baffle, dipolar, controlled directivity
  • Chassis:: Two Layer HDF (High Density Fiberboard)
  • Driver compliment: Two 15 inch mid/woofers, one Spatial M35 Uniwave wide bandwidth compression driver
  • Crossover: 700Hz - Passive - Hologram Network Technology - WBT NextGen Binding Posts
  • Frequency Response: 32Hz - 22kHz +/- 3dB in room response
  • Efficiency: 95dB 1W@1M 16Ω
  • Impedance: 16Ω average
  • Recommended amplifiers -tube or solid state 8 Watts to 200 Watts
  • Dimensions: 42T x 17W x 3D inches, 55 lbs net each
  • 20 year limited warranty
  • American innovation. Made in USA
  • Available in Black, Red and White Satin.




Mcleans customer review - Sept. 2017

My initial encounter and first listening experience to the Spatial Hologram M3 Turbo S at the showroom.

Initially, I took my Spec RSA 717-Ex class D amplifier to audition the Magnepan 1.7i at Bill's house, after a few tracks played, I was disappointed that my SPEC RSA 717-EX amplifier did not quite live up or match up to the Magnepan, the sound was flat, compressed and lacking "energy", the maggies need lots and lots power to sound good.

Since I already made the trip to Gosford, we went back to Bill's shop to audition the Spatial Hologram M3 Turbo S even though I have no intention of buying the Spatial Hologram Turbo S3, it was the name and type of speakers I have not heard previously and not familiar within the audio circles, I had my heart and mind set on the Magnepan.

After Bill hooked up the Spec to the Hologram my initial thoughts on the M3 were WOW, WOW, WOW !!!!!!: 

It has a very big expansive open sound that seem to fill the room, the midrange was extremely focus, it has lots of energy, sounds very efficient , plays loudly easily with very little power amplifier, even at low volume, big punchy dynamics, superfast, very rocking, gutsy sound, tight bass, overall it has a beautiful ambiance and it is very musical, one thing I notice the bass presentation is more directional, free of boomy bass and ho-hum sound, sounds usually associated with ordinary untreated audio rooms.

I was actually taken aback and very surprised how good they sound in Bill's shop, the room set up can be described as semi open area with partitions on the side, front and back, not your usual dedicated audio room found in some other competitors like Len Wallis audio or Lifestyle. After hearing them, I can confidently say the Spatial Hologram M3 Turbo S will sound amazing in any room configurations or sizes due to their unique design.

Listening to the Spatial Hologram M3 Turbo S is like listening to electrostatic and horn-type speakers combined into one and I had listened or heard many speakers in my lifetime, my own audiophile journey going back to 1977.

I made up my mind to purchase after only listening to 3 tracks, I just knew that I was not going to leave Bill's shop without taking the speakers with me.

The Spatial Hologram M3 Turbo S are an excellent pair of speakers that will produce and deliver sonic sounds that you look for in your audiophile journey, be it jazz, classical, pop, acoustic, forget about the price or name, do yourself a favour, go there and just listen.

I strongly recommend every audiophile audition them at least once in their lifetime.

Music played via flac files-

Steely Dan " Negative Girl"
Steely Dan "Babylon Sisters"
Fourplay " Any time of Day"


Bill's Amp Recommendations - it's a Match!

Good: LM Audio LM218IA Integrated Amplifier
Better: Linear Tube Audio MZ-2S Pre amp and ZOTL 10 MKII Power Amplifier
Best: Linear Tube Audio MZ-2S Pre amp and ZOTL 40 Power Amplifier


See the Spatial Hologram factory tour over at DAR


Colour Selection - Choose one option   Satin White with Grey cloth
  Satin Black with Black cloth
  Satin Red with Black cloth


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