Argon 6350 bookshelf speaker, Spinorama measurements

[Maiky76]

Here are measurements of the Argon 6350 bookshelf speaker.

Argon speakers are developed and sold by the Danish retail chain Hifi Klubben (founded by Peter Lyngdorf). The retail price was ~131 USD/pair (1396 SEK) in 2014.

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I measured at 10 deg increments both horizontal and vertical, using a calibrated UMIK-2 (1m).

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The on-axis response is a bit uneven, but the early reflections are surprisingly smooth. Directivity error at crossover.


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Horizontal directivity:

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0-90 deg for comparison with Stereophile measurements:

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Vertical directivity:

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Distortion, 86 dB SPL at 1m (96 dB at 30 cm):

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I didn't measure at higher SPL since it's not my speaker, and I want to return it in working order . There was no audible distortion or port noise though.

Overall, the results are quite impressive considering how inexpensive these speakers were. They were discontinued in 2018.

Here is my take on the EQ.
Please report your findings, positive or negative!

For the score rational your journey starts here
Explanation for the sub score
The following EQs are “anechoic” EQs to get the speaker right before room integration.
If you able to implement these EQs you must add EQ at LF for room integration, that is usually not optional… see hints there.

The raw data with corrected ER and PIR:

Score no EQ: 4.2
With Sub: 6.7

Spinorama with no EQ:

EQ design:

I have generated two EQs. The APO config files are attached.

• The first one, labelled, LW is targeted at making the LW flat
• The second, labelled Score, starts with the first one and adds the score as an optimization variable.
• The EQs are designed in the context of regular stereo use i.e. domestic environment, no warranty is provided for a near field use in a studio environment although the LW might be better suited for this purpose.
• Large difference in loudness needs adjusting when A/B

Score EQ LW: 5.9
with sub: 8.3

Score EQ Score: 6.5
with sub: 8.8

Argon 6350 APO EQ LW 96000Hz
June262024-133806

Preamp: -2.10 dB

Filter 1: ON HPQ Fc 52.8 Hz Gain 0.00 dB Q 1.34
Filter 2: ON PK Fc 119.4 Hz Gain -5.90 dB Q 1.45
Filter 3: ON PK Fc 640.8 Hz Gain -1.25 dB Q 5.69
Filter 4: ON PK Fc 924.6 Hz Gain -2.26 dB Q 3.92
Filter 5: ON PK Fc 1452.4 Hz Gain -0.74 dB Q 5.73
Filter 6: ON PK Fc 1788.6 Hz Gain -4.46 dB Q 1.33
Filter 7: ON PK Fc 13785.8 Hz Gain -6.15 dB Q 1.23

Argon 6350 APO EQ Score 96000Hz
June262024-133807

Preamp: -1.90 dB

Filter 1: ON HPQ Fc 52.7 Hz Gain 0.00 dB Q 1.38
Filter 2: ON PK Fc 115.2 Hz Gain -5.77 dB Q 1.17
Filter 3: ON PK Fc 632.2 Hz Gain -1.56 dB Q 4.80
Filter 4: ON PK Fc 929.6 Hz Gain -2.57 dB Q 3.30
Filter 5: ON PK Fc 1552.0 Hz Gain -1.11 dB Q 6.09
Filter 6: ON PK Fc 1907.1 Hz Gain -4.25 dB Q 1.10
Filter 7: ON PK Fc 4053.8 Hz Gain -1.00 dB Q 1.06
Filter 8: ON PK Fc 13967.7 Hz Gain -6.99 dB Q 0.85

Spinorama EQ LW

Spinorama EQ Score

Zoom PIR-LW-ON

Regression - Tonal

Radar no EQ vs EQ score
Nice improvements