DXT-MON RNX | Monitor | reference speaker

Technical data

Frequency range (-3dB): 49- >20000Hz
Sensitivity (2,83V/1m): 85 dB
Crossover frequency: 1950Hz LR4
Nominal impedance: 4 Ohm
Concept: 2 ways, bass reflex
Net volume: 14l
Dimensions (HxWxD): 380x224x288mm

Applications

ambitious stereo applications in small to medium-sized rooms
passive near-field monitor
In the home cinema as a main, center or rear speaker.

It made sense to test the, allready in Mark K's ER18DXT installed and proven combination of Seas ER18RNX (H1456-08) and Seas DXT 27TBCD/GB (H1499), also in the DXT-MON series.
And the test was successful ... In terms of cabinet size, it is significantly smaller than the DXT-MON-182, correspondingly a little less deep bass. In terms of horizontal directivity, the DXT-MON-RNX sets the bar even a little higher. An extremely fascinating speaker!

Components

Seas ER18RNX (H1456-08)

Seas DXT 27TBCD / GB (H1499)

Test

Measurements

**Sum, drivers, vs. null, 0 ° hor.**
perfect linearity
-3dB @50Hz
Filtering: 1950Hz LR filter 4. order
symmetrical flanks, optimal addition

DXT_MON_RNX_Impedance — **impedance**
no disturbances whatsoever
Minimum 3,2Ω @ 20kHz

**Directivity horizontal 0-90 °, 15 ° steps**
perfect directional behavior

**Directivity horizontal 0-90° (Sonogram)**
Area representation of the angular frequency responses shown in the previous image

**Angle vertical top 0-15 °, 5 ° steps**
Driver arrangement and filtering corresponding, unproblematic behavior

**Angle vertical down 0-15 °, 5 ° steps**
Driver arrangement and filtering corresponding, unproblematic behavior

**Harmonic distortion (85-100dB)**
extremely low level of distortion at all measured levels

**Burst decay**
rapid decay over all frequencies

Housing

38mm front
Body 19mm
Interior walls with alubutyl (double) / Hardboard sandwich
Two struts between the side walls

Crossover

Construction plans DXT-MON-RNX | bilingual
60,00 €
Shipping: Free
Details

6 thoughts too "DXT-MON RNX Reference compact speaker"

Can you please provide an estimate of the crossover component cost? This is a critical variable before committing to purchase of the design.

Heißmann-Acoustics says:

December 11, 2023 at 02:52 pm

Hello Tom
With Jantzen standard parts (3 Aircoils, 1 Iron-Core Coil, 6 Crosscap MKPs, 6 Mox 10w resistors) about 65€ in Germany.
Sorry for the delayed answer!

Best regards
Alexander

Reply

Can you provide an impedance plot for the DXT-MON-RNX? Or at least a minimum impedance @ approx. frequency?

Heißmann-Acoustics says:

January 30, 2024 at 02:03 pm

…done… 🙂

Reply

The DXT-MON RNX is described as "significantly less bulky than the DXT-MON-182 in terms of housing size". However, the dimensions for both are identical in the technical data. What are the correct dimensions for the DXT-MON RNX?

The BR pipe is probably on the back, right?

Thanks and regards
Erich

Heißmann-Acoustics says:

June 16, 2024 at 13:04 pm

Hello Eric
The RNX has a depth of 288mm, the DXT-MON-182 338mm. This is also stated in the technical data.
Yes, the BR pipe goes to the back.

Regards

Reply