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Connecting 6 Ohm STX Woofers and 8 Ohm TVM Tweeters to Diora WS442 Amp

El_liero 51433 50
Best answers

Can I connect a 6 Ω woofer and an 8 Ω tweeter to a Diora WS442 amplifier without damaging it?

Yes — you can connect a 6 Ω woofer and an 8 Ω tweeter to the Diora WS442, but use a proper crossover and do not drive the amp into clipping or audible distortion [#2310040][#2316837] A 6 Ω load is considered acceptable for this amplifier; it will draw more current than 8 Ω, so the output transistors may run warmer, while the transformer/power supply will limit the real output anyway [#2310040][#2323249] Do not add series resistors just to “fix” the impedance unless they are small compared with the speaker impedance, because series resistance only raises the load seen by the amplifier and slightly worsens damping [#2321238] The ARV-104-04-8 tweeter was considered suitable and unlikely to burn because it is more efficient than the woofer and will work with attenuation in the crossover [#2316802] For this STX/TVM set, a crossover around 3 kHz was discussed, and small changes from that value were not treated as a major problem [#2310040][#2319796]
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  • #31 2318422
    Tarru
    Level 15  
    Hi ... I'll just tell you this ... This kind Diora is standing in front of me and has been using 4ohms for half a year now and she has already been to many events and walks very nicely ... it was connected to the SW stage set :D

    Ps and as for these raisers ... I do not know why you are such supporters of turning off the contour ?? For me, the sound with an outline is cleaner and more transparent ... Maybe someone will convince me to turn it off?
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  • #32 2318446
    Anonymous
    Anonymous  
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  • #33 2318905
    El_liero
    Level 24  
    Oh, OK


    and some of you have a page where there is a crossover diagram for ARV-104-04-8

    I will start looking for something tomorrow ... but for sure I won't find everything ...
  • #34 2319257
    J. S.
    Level 27  
    Guy! After all, I gave you a crossover for this ARVka and GDN! What do you mean? Do you read any replies to your posts?
  • #35 2319418
    El_liero
    Level 24  
    J. S. wrote:
    Guy! After all, I gave you a crossover for this ARVka and GDN ...



    relax... ;) I know, I know ... I saw it and I have it on HDD ...

    because you see ... in this diagram, L1 = 1.2mH ... thanks to this there is a division of about 3500Hz ... and I would like to have a division of about 3000Hz ... and I think that it is enough for me to increase from 1.2mH up to 1.3mH

    the problem is that there is no such coil for sale ...

    and now the question:
    maybe I would connect 2 coils together so that they were together equal to 1.3 mH? good idea ... it will work ... can you?

    2 question:
    What is RDC? (one of the parameters in the coils - expressed in ohms) explain to me because I have to choose the right parts for my verse
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  • #36 2319511
    J. S.
    Level 27  
    Rdc - if in [?], then probably the coil resistance for direct current.
    Look, maybe you will find a coil as needed. If not, you can unroll a bit more. With the rest of 1.3 and 1.2 mH it is not a big difference, it would probably be difficult to remove it in the listening experience.
    You want a lower cut - give a larger voice coil for the woofer. Do not try too hard with the tweeter, because with a lower cut, the power strength will be lower. You will have a tiny slump in the characteristics - "withdrawn" midrange.
  • #37 2319537
    El_liero
    Level 24  
    I mean cutting from the woofer ...
    at 1.2mH it is around 3500Hz
    at 1.5mH it is about 2500Hz (I've seen graphs with such a crossover)

    and i need about 3000Hz

    then how? can I connect 2 coils together so that it gives me 1.3mH?
  • Helpful post
    #38 2319796
    J. S.
    Level 27  
    You can connect 2 coils. If they are not magnetically coupled (close to each other / parallel axes) - the resultant inductance will be the sum of the inductances of individual coils. If, on the other hand, you place them too close to each other, they will interact with each other and depending on how they are located in relation to each other, the resultant inductance will be greater or less than the sum of the inductances of individual coils.
  • #39 2320241
    Hefajstos
    Level 35  
    Quote:
    You forgot about one important thing, which is too weak power supply - 120W transformer will not allow you to get such power


    All the better for transistors in the power amplifier :)


    -
    greetings
    Hephi
  • #40 2320971
    El_liero
    Level 24  
    and will it be that:
    How do I connect a 0.4 ohm RDC coil to a 6 ohm speaker ... the speaker will behave as if it had 6.4 ohm?
  • #41 2321036
    Tarru
    Level 15  
    Not quite ... the coil will do as a crossover here :D
  • #42 2321200
    El_liero
    Level 24  
    well ... like a crossover ... but from what I know, "the impedance of the speaker will increase" ... as if ... no?
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  • Helpful post
    #43 2321238
    J. S.
    Level 27  
    If you connect any resistance in series with the loudspeaker, then the impedance as seen by the amplifier will of course be larger by an appropriate amount. The overall goodness of the loudspeaker will also increase slightly - Qts - as described by Igod here: http://diyaudio.pl/articles.php?id=5. The so-called damping factor, a bit. However, there is no need to worry about these two things, as long as the resistance in series is much less than the impedance of the speaker itself.
  • #44 2321406
    El_liero
    Level 24  
    and thanks to this, I have a problem with my head that at least 8 ohms can be connected to my amplifier ... and I will buy GDN speakers that have only 6 ohms ... ;)

    Added after 17 [minutes]:

    Well, that's about the speakers and crossovers ... now I can start buying and assembling it all ... although there is still the housing ... but the time will come for that ...


    if I make the columns, I will write reviews ... (+ photos) ... with thanks and paste it here

    thanks to everyone for your help ... especially JS
  • #45 2321634
    Tremolo
    Level 43  
    Apart from the boost, the opposite phenomenon can occur - for example on old cassette tapes ... Input is not controlled. And then you can shoot to the max without using any equalizers and we still have no imaging.

    I gave an example signal with the only true setting - all set to zero. The lack of linearity of the potentiometer characteristic can be corrected by playing somewhere on the half of the output power (i.e. where the Loudnesses do not work)
    Helpful post? Buy me a coffee.
  • #46 2323249
    Hefajstos
    Level 35  
    -> El Liero
    Do not try to install a coil with Rdc = 2ohm, because you will worsen the bass control. Rather, assume that the amplifier will be fine on 6 ohms, as this is not a cheap Chinese tower. Besides, the amp's transformer won't allow for more.


    -
    greetings
    Hephi
  • #47 2323415
    El_liero
    Level 24  
    ok ... good to know ;)
  • #48 2323858
    Kamil_KJM
    Level 12  
    And can I connect the 4? speakers to the DIORA WS 502 amplifier, which writes 8?? Nothing's going to burn ???
  • #49 2323889
    J. S.
    Level 27  
    Quote:
    And can I connect the 4? speakers to the DIORA WS 502 amplifier, which writes 8?? Nothing gets burned ???

    Look for! The topic was discussed also in the context of this amplifier.
    Standard answer:
    If you listen quietly, nothing should happen. However, if you play it loud, such exploitation will cause faster wear and tear up to and including the destruction of the power amplifier.
  • #50 2323970
    Trenton
    Level 18  
    I deviate a bit from the topic, but I want to come back a little. Which potentiometers are better. From which group. Regards
  • #51 2332480
    Hefajstos
    Level 35  
    Conrad Pihery - cheap and good.

    Generally, B is used for audio, but it may be different in the case of foreign ones. Retailers usually know which to give, like you say to adjust the volume.
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Topic summary

✨ The discussion revolves around connecting 6 Ohm STX woofers and 8 Ohm TVM tweeters to a Diora WS442 amplifier, which is rated for 2x35W RMS at 8 Ohms. Users express concerns about the compatibility of the 6 Ohm speakers with the amplifier, which specifies a minimum impedance of 8 Ohms. Several participants suggest that while it is possible to connect the 6 Ohm speakers, caution is advised regarding volume levels to prevent distortion and potential damage. Recommendations include using a low-pass filter to slightly increase the impedance of the woofer and ensuring that the amplifier is not pushed to its limits. The conversation also touches on crossover design for the setup, with users sharing insights on different crossover types and their implications for sound quality. The need for careful selection of components and monitoring of amplifier performance is emphasized to avoid overheating and distortion.

FAQ

TL;DR: Using 6 Ω woofers boosts output current by about 33 % compared with 8 Ω loads [Elektroda, Tremolo, post #2310040] "Turn it down when you hear distortion" [Elektroda, J. S., post #2305888] Add a 2-way Linkwitz-Riley filter at 3 kHz and avoid full-volume bursts.

Why it matters: This setup lets Diora WS-442 owners match modern STX/TVM drivers without frying amps or tweeters.

Quick Facts

• Diora WS-442 rated 2 × 35 W RMS @ 8 Ω; transformer ~120 W total [Elektroda, Anonymous, post #2318446] • Current rises ≈1.33× when load drops from 8 Ω to 6 Ω [Elektroda, Tremolo, post #2310040] • Safe listening level: stop before audible “wheezing” or clipping [Elektroda, J. S., post #2305888] • Linkwitz-Riley 2nd-order crossover parts for 3 kHz, 6 Ω woofer: L=1.3 mH, C=6.6 µF (calc). • ARV-104-04-8 tweeter needs −3 dB pad; power after filter ≈5 W [Elektroda, Tremolo, post #2310040]

Can I safely connect 6 Ω STX woofers to a Diora WS-442 rated for 8 Ω?

Yes. The amp tolerates 6 Ω loads if you keep volume below clipping. Several users run 4–6 Ω speakers without failures [Elektroda, Hefajstos, #2306480; #2323249].

Will adding series resistors protect the amplifier?

No. Extra resistors waste power and overheat [Elektroda, Q-mac, post #2304352] Focus on sensible volume and adequate heatsinking.

What crossover type and cutoff work best for STX 18-120-6 + TVM ARV-104?

Use a 2nd-order Linkwitz-Riley at 3 kHz. It offers flat summation and manageable tweeter load [Elektroda, Tremolo, post #2311276]

Which inductor value gives a 3 kHz woofer roll-off on 6 Ω?

Approx. 1.3 mH in series achieves 3 kHz. Two smaller coils can be wired in series; keep them 5 cm apart to avoid coupling [Elektroda, J. S., post #2319796]

Does the tweeter’s 45 W rating risk burnout during parties?

Unlikely. After the filter the tweeter sees only a few watts; it also gets an L-pad drop, lowering stress [Elektroda, Hefajstos, post #2316802]

Edge case: what happens if I run full volume into 4 Ω speakers?

The WS-442 reaches full power near 0.4 V input; beyond that it clips hard, overheats, and may blow output transistors [Elektroda, Tremolo, post #2310040]

How do I calculate capacitor and inductor values quickly?

Use AJDesigner’s 2-way calculator; enter driver impedances and choose Linkwitz-Riley alignment, then round to nearby E12 parts [Tremolo, #2310040].

Will coil DCR raise system impedance?

Yes. A coil with 0.4 Ω adds that resistance in series, so the amp “sees” roughly 6.4 Ω at low frequencies [Elektroda, J. S., post #2321238]

Simple 3-step guide: wiring the speakers and crossover

  1. Mount woofer and tweeter in the cabinet with gasket tape.
  2. Solder the 3 kHz Linkwitz-Riley network (L-C on woofer, C-L on tweeter), observing polarity.
  3. Add an −3 dB L-pad before the tweeter, then connect to amp terminals—test at low level first.
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