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Mission 705 crossovers no hf can I fix them?

Hi, just got some mission 705s but the crossovers are delivering almost inaudible high frequency sound, can barely hear them at high volume with the amp connected to the high frequency speaker terminals only, have tried tweeters via some 735s and both work just fine, have looked at x-overs and can't see anything untoward, so I was wondering if I could fix them? Maybe replace a capacitor or something, maybe even improve the sound, I don't know, I need help! Many thanks, Sid

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Wharfedale Modus One

The tweeters are probably blown, i had the same problem.
You can test this by placing the cable on the dismanteled crossover at the back of the speaker. colour blue/yellow.
No high volume please.
See http://www.hometheatershack.com/forums/diy-speakers/4549-wharfedale-modus-one-six-crossover-pics.html
for pictures.
If the tweeter is blown it can be dismanteld with the aid of a screwdriver, horizontally.
Place it between the tweeterbowl and the ring which has the mark wharfedale on it. The tweeter comes loose. On second hand sites you can buy little speakers, like modus one or two's with the same tweeters for a good price and put them on your larger speakers.

This how i repaired 2 of my 4 modus eights.

good luck Danny Mol
the netherlands

Posted on Mar 11, 2008

TJBENGR
  • 121 Answers

SOURCE: Tweeters & Midrange Speakers

If you have a Ohm Meter, check the resistance to the speakers. If it is very high, the speakers are burned, (or the crossover is (just capacitors, and resisters...cheap)). If it is close to 4 ohms check the wiring and connectors..to and at the speakers, most likly the receiver/amp is not blown.

Posted on Apr 20, 2008

  • 133 Answers

SOURCE: Midrange and tweeter driver not hit the the high range.

Are u sure u haven't messed up with the polarity of the speakers while rewiring the speakers? If all is ok and only u find that the speakers are not so vibrant as the other there cud be a possibility that the coil has shifted inside the magnet and is either scratching or not aligned. Also hav a look at the crossover

Posted on Aug 26, 2009

Testimonial: "Thanks. I appreciate the timely response and other things to consider"

  • 1 Answer

SOURCE: blown kef q55.2 tweeter, is replacement possible?

The tweater on my Q55.2 blew as well. I went into a shop in NYC and they tried to charge me $225 for a new tweater, so I took it home and called up Kef. They sent me out a new tweater for $35 and instructions on how to solder it in.
It took all of 10 mins to replace and they are working fine. I've never soldered anything before and it was simple.
Cheers
Martin

Posted on Sep 12, 2009

jhinsincity
  • 616 Answers

SOURCE: With reference to a JBL 4311 WX-A speaker...

Any wire with a black stripe on in is usually negative

Posted on Feb 27, 2010

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1 Answer

What is a crossover an what does it do


Basically a crossover filters high and low frequency sound into separate bands and then only allows that band of frequency to reach the speaker! Uses are for feeding a sub woofer with low frequency sound and a tweeter with high frequency sound!

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Difference between high and low frequency


This would depend on which area of radio you are asking about. In FRS/GMRS there is no "low frequency" though some manufacturers may use those phrases. FRS/GMRS radios are all in the UHF range, or ultra high frequency. In amateur radio we use UFH, VHF, and HF or high frequency. Though the FCC does not allow amateur use of the LF range, there are experimental stations that are allowed to operate ther. See http://www.arrl.org/lf-low-frequency for an explanation of this. For an understanding of the range of frequencies and what is UHF, VHF, HF, etc. see the chart at the lower part of the page at http://en.wikipedia.org/wiki/Radio_frequency

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1 Answer

Subwoofer makes noise like an untuned TV regardless of volume knob


I would suggest your crossover unit has failed in the speaker cabinet. The crossover circuit board separates the low and high frequency content of your stereos audio signal. The low frequencies go to the bass unit (woofer) and the high frequencies go to the tweeter speaker. If the capacitor on the crossover goes open or near open circuit then noise is introduced into the sound system. Replace either the capacitor or crossover unit.

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Don't understand how to connect my speakers


the 4 inputs are for biamping, (using separate amplifiers for low and high frequencies). just leave the pins in place and connect the amplifier to one red(+) and one black(-) connector on the speaker. It has an internal crossover to protect the tweeter.

Nov 20, 2013 | Audio Players & Recorders

2 Answers

Peavey sp2xt speakers horn makes no sound when plugged into normal input. Horn works fine when plugged into the high side of the crossover.


High side speaker input jack defective, as they are switch also and if you plug the wire from the amp in full range and no hf sound but connecting directly to the bi-amp hi does, then your female 1/4 plug at crossover is defective for sure.

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1 Answer

I put a sub in my 2002 Altima but when I turn it up the bass cracks on the door speakers??? What do I do to get all the bass on the sub


Hi Ethan,

What you're looking for is called a "crossover". A crossover is an electronic filter for an audio or speaker circuit. In an audio circuit, a crossover is used to prevent or pass certain frequencies or a range of frequencies from passing through it. Since your sub will reproduce the bass or low frequencies, you don't want other speakers to reproduce them. A band pass filter on your door speakers will do this for you. A band pass filter passes only a range or "band" of frequencies and blocks those that are above and below the range or band of frequencies selected. Installing a band pass filter will prevent the very high & very low frequencies from getting to the door /dash speakers. Likewise, you should consider connecting a low pass filter to your subs, too. The low pass filters work a little differently from of the way band pass filters work - they only allow low frequencies to get to the sub - blocking all the other higher frequencies (your other speakers are better suited to reproduce those). Lastly, you would install a high pass filters on tweeters. Tweeters are designed to reproduce only the high frequencies - sending mid and low frequencies to them is wasting power and can cause damage to them.

You purchase the filters for specific crossover points (the block / unblocked point) as determined by the individual speakers. If a sub has a frequency response of 20Hz - 100Hz, a low pass filter of 100Hz would be ideal. Remaining filters would need to begin at 100Hz - assuming the mid-range speakers have a frequency response beginning at 100Hz. A band pass filter of 100Hz - 3KHz would fit the bill nicely if the mid-range speakers go up to 3Khz Match the high end of the band pass to the high end of the frequency response of the mid-range speakers. Next, a high pass filter at 3KHz would allow only the high frequencies to your tweeters. Basically, you want to have the entire audible range 20Hz - 20KHz covered by the speakers and have the crossover points that match the frequency response ranges of the speakers.

I hope this helps & good luck!

Apr 12, 2012 | Pioneer Car Audio & Video

1 Answer

Can we use the subwoofer as an amplifier for speakers? it has jacks for speaker in/out, but i can't figure out how to make it work because the speakers have no sound.


I don't believe this hookup is amplified; but, if you have used the regular unfiltered speaker connections from your receiver/amplifier to hookup the subwoofer, the system will pass the signal thru the outputs subject to the crossover adjustment on the back panel. You cannot get the full signal if your system is sending only the bass signal to the subwoofer. I have copied the instructions below from the manual. You would set the high freq crossover to the low end of your satellite's frequency range. The full manual is here: http://www.jbl.com/EN-US/Products/Pages/ProductSupportDetails.aspx?PID=PSW-D110

High-Pass Control
• If you hooked up your subwoofer
as shown in Hookup
3 on page 4, you also have
the capability of adjusting
the high-pass frequency.
The High-Pass control
determines the frequency at
which the main speakers
will start reproducing
sounds. If your main speakers
can comfortably reproduce
some low-frequency
sounds, also set this control
to a lower frequency
setting, between 50Hz –
100Hz. This will concentrate
the subwoofer’s
efforts to the ultradeep
bass sounds, while your
main speakers continue to
reproduce the mid-bass
information. If you are
using smaller bookshelf
speakers that do not extend
to the lower bass frequencies,
set the high-pass crossover
control to a higher setting,
between 125Hz – 180Hz.
With this setting, your main
speakers will not have the
burden of reproducing any
low-frequency sounds.
• If you hooked up your subwoofer
as shown in Hookup
1 on page 3, the high-pass
frequency is fixed at 180Hz.
• If you hooked up your subwoofer
as shown in Hookup
2 on page 4, there is no
high-pass control. Unless
your receiver/amplifier
incorporates a high-pass
crossover, your main speakers
will continue to get a
full-range signal.
Final adjustment and blending
of the low-pass and high-pass
controls may evolve over several
listening sessions. A good
starting point would be to set
both the low- and high-pass
controls to the same frequency
and adjust from that point.

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3 Answers

I have a peavey SP4XT Cabinet . the cross over network has a bi amp input for HF and LF jacks and these work for both LF HF output . Also on this network is two input quarter inch jacks for full range...


The chokes blocks high frequency, the capacitors block low frequency. You would need a digital multimeter to check for continuity. Make sure none of the resistor is burnt, which may not be obvious.

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1 Answer

OUT OF RANGE


Sounds like the Video setting is too high. Change the refresh rate lower and change the resolution lower. You monitor can't handle the setting that you have it on.
I can't fix this for you, but if I helped you get it fixed, please rate it as a fixya not a helpful rating. These ratings let me be allowed to help you and others in the future.

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1 Answer

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