Logitech z5500 sattelites TB W3-871s. - diyAudio
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Old 13th December 2006, 05:36 PM   #1
willhub is offline willhub  United Kingdom
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Default Logitech z5500 sattelites TB W3-871s.

Hi, i have a Logitech Z5500 speaker system, the sattelites use the TB W3-871s drivers, but the enclosure is not good enough, so i would like to make a new one which is tall enough so that i dont need to use speaker stands.

I dont know if its possible if i want to keep using the z5500 subwoofer and amp, if it is possible, i would like to choose that option due to the fact i cannot afford to buy propor Hi-Fi equipment at the moment, i have seen other projects around this site which use the same drivers but with amps, apparently there would be problems trying to make a better enclosure for the drivers ebcause of the quality of the amp in the subwoofer and something to do with the crossover points.

I think using my X-Fi sound card i can adjust crossover with that, but i dont know if it does the same thing.

Anyway any advice on building a new enclosure would be greatfull, it would be something fun to do aswell building an enclosure, i dont expect it to be an easy straight forward thing, i dont even know if it will be possible, but i hope so, anyway any help is apreciated.

Thanks
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Old 13th December 2006, 06:36 PM   #2
sreten is offline sreten  United Kingdom
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- Total RMS power: 505 watts RMS
- Satellites: 317 watts RMS (2 x 62 W front, 2 x 62 rear, 69 W center)
- Subwoofer: 188 watts RMS
- Total Peak power: 1010 watts
- Maximum SPL: >115 dB
- Frequency response: 33 Hz — 20 kHz
- Amplifier: Ultra-linear, high-capacity analog
- Signal to noise ratio: >93.5 dB, typical 100
- Input impedance: 8,000 ohms
- Hardware decoding for Dolby® Digital, DTS®, and DTS®, 96/24 soundtracks
- Dolby Pro Logic II (Movie and Music modes)

Hi,

http://www.zaphaudio.com/archives.html

For info on the TB W3-871s, especially the notch filter.
Its possible the above has active equalisation.

I can't see the issue with rehousing the TBs.

/sreten.
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Old 13th December 2006, 06:45 PM   #3
willhub is offline willhub  United Kingdom
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What is Active Equilization?

So do you think there is no need to rehouse the speakers? its just i heard with the current enclosure they only go down to 110hz.
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Old 13th December 2006, 08:23 PM   #4
willhub is offline willhub  United Kingdom
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sorry, should of put this in before aswell.

Why are these notch Filers required?
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Old 13th December 2006, 10:18 PM   #5
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Quote:
Originally posted by willhub
sorry, should of put this in before aswell.

Why are these notch Filers required?
They flatten the frequency responce of the driver, e.g. attenuate annoying spikes around ~7kHz (or elsewhere depending on the driver).

I have used the W3-871 without notch and without any problems. It sounds ok just as it is.
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Old 13th December 2006, 11:22 PM   #6
willhub is offline willhub  United Kingdom
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Did you buy your W3-871's seperatly or get them with a speaker set?

If i did place the W3-871's from the logitech sattelites in a bigger and better enclosure (still using Logitech Z5500 Amp and Sub), what should i expect, will it be alot better, will these things go down to say 80Hz.

Also is there anyway if i take my z5500 to an electrical shop (once i made new boxes for the W3-871's and knew its lowest frequency it can go) that they could lower the crossover frequency of the z5500 sub, possible make any adjustments to the sub aswell so maybe the sub can be made to go to say around 25Hz, and so the crossover point is lower, as i would of thought making a new enclosure may make these little drivers go lower, which will make the set sound wierd due to the crossover point right?
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Old 14th December 2006, 06:49 AM   #7
zBuff is offline zBuff  New Zealand
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I've got a set of Logitech z-680s, and I've thinking about doing the same thing. Yes you should get more extended bass output with a larger enclosure. But you might want to make sure the logitech amplifier isn't cutting off the frequencies that you want more of for a start. Try hooking up another speaker to the amp, make sure it is the same ohmage, you have to make sure the crossover isn't the cause of it (I doubt it is personally)
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Old 14th December 2006, 09:34 AM   #8
willhub is offline willhub  United Kingdom
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Ok, there is a slight problem there, i dont have anymore speakers with speaker cable, there all rca or 3.5mm phono, maybe i can cut one of the speakers wire and use that? but the speakers are rated at 5watt, dunno if thats rms or max for these other ones and it has like 1" speaker.

If i did hook up another speaker, what exatly should i be looking for?
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Old 14th December 2006, 11:58 AM   #9
Pano is offline Pano  United States
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Quote:
Originally posted by willhub
If i did hook up another speaker, what exatly should i be looking for?
If you hook up a larger speaker, one with more bass, you'll be listening to find how low the satellite channels go. They probably roll off under 150Hz.

You can use a software signal generators such as the NCH tone generator. If you are connected to the Logitech via USB, be sure to chose it as your sound card in the NCH setup menu.

If you have a volt meter, you can actually measure the response and post it here. Then someone here can figure out what the crossover is doing.
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Old 14th December 2006, 12:33 PM   #10
willhub is offline willhub  United Kingdom
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Ok, thanks for the replies

I was thinking of buying some nice bookshelf speakers, 2 of them and using the for the front speakers, as say if the bookshelve are listed as 60w, then they should work ok with the z5500, but the only problem is, the tangband sattelites speakers are listed as 12w rms, when lightech listed the sattalites as been 62w rms each, so there is a problem there, maybe if i bought some nice bookshelve speakers they would not work as they would draw too much power?

The speakers are no connected via USB, there connected via optical and 6ch direct, i cant use 6ch direct because i get unusual distortion in the rear channels that never happened with my old set of z5500's so maybe my SB X-FI Fatal1ty is faulty

Will any volt meters work? i dont have one but i will check with a neighbour who might have one.
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