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Multi-Way Conventional loudspeakers with crossovers

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Old 12th December 2011, 06:28 AM   #1
msj965 is offline msj965  United States
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Default BIC America dv62si

Hello
I just bought a pair of 2way speaker - bic dv62si.Is there any other way to improve the sound quality of this speakers?and how. Thank you in advance.
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Old 12th December 2011, 07:19 AM   #2
mdocod is offline mdocod  United States
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In my experience the best way to make speakers sound better is to improve the quality of the signal they are getting.

What kind of amp are you using?
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Old 12th December 2011, 08:18 AM   #3
msj965 is offline msj965  United States
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I'm using the trends 10.1 amp. the reason why is this speaker produce excessively bright and a little no warm on mids range and no bottom end.
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Old 12th December 2011, 09:30 AM   #4
mdocod is offline mdocod  United States
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When I hear the term "warm" I generally associate that with even ordered harmonic distortion, like that from a tube amp. I don't generally expect to get a "warm" performance from a solid state amp, and I wouldn't expect a speaker to introduce said distortion either, especially at the lower sort of listening levels expected from a 6WPC amp.

I'd be tempted to pull the drivers and have a look in the box at what sort of crossover components are being used... It's possible that all they have done is slap a cap on the tweeter and left the woofer to free range the whole situation, which would cause a fairly annoying on-axis brightness in the ~4-10K range more than likely. It's also likely that the tweeter is anywhere from 3-6db more efficient than the woofer, so if they didn't pad it down with a resistor the system would sound overly bright. Depending on the crossover point they have chosen, an upgrade to a steeper x-over and a lower x-over frequency may also be worth considering. Since you aren't going to be driving these units very hard with that little amp, you could probably get away with dropping the crossover point quite a ways which may help eliminate some on axis brightness from the woofer. If they have the thing crossed at like 4-6K (wouldn't surprise me) then working on the crossover will make the biggest difference IMO.

If you have a router and a proper rabbit joint cutting tool you might consider flush mounting those drivers. I would probably do so by using a piece of 1/4" thick piece of wood, with cutouts for the drivers, just glued to the front of the box. I would want to use a round-over or beveled transition to the tweeter flange face (since the 1/4" will probably be a bit on the thick side for the tweeter flange). That may calm down some of the bright spots.
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Old 12th December 2011, 09:49 AM   #5
msj965 is offline msj965  United States
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I'm going to open that speaker and let u know what xover and detailed parts they put.

Thanks and more power to u.
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Old 23rd August 2012, 06:57 PM   #6
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These BIC bookshelf speakers are a fantastic platform for modding because they are inexpensive but based on decent quality parts. I have designed my own mod which makes them very musical.
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Old 24th March 2013, 12:33 PM   #7
nuconz is offline nuconz  United States
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These BIC bookshelf speakers are a fantastic platform for modding because they are inexpensive but based on decent quality parts. I have designed my own mod which makes them very musical.
care to share the mod?
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Old 24th March 2013, 06:55 PM   #8
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care to share the mod?
Hi,

Well, I begin by upgrading the cabinet damping which is almost nonexistent in the stock form. The damping upgrade is absolutely essential because the next part of the mod, the crossover, makes so much more bass that without extra damping it would boom badly. For the crossover I change out all components with specific parts except the woofer inductors. Those are the only things that remain.

Do you have the DV62si speakers?
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Old 24th March 2013, 07:08 PM   #9
nuconz is offline nuconz  United States
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Originally Posted by Dave1027 View Post
Hi,

Well, I begin by upgrading the cabinet damping which is almost nonexistent in the stock form. The damping upgrade is absolutely essential because the next part of the mod, the crossover, makes so much more bass that without extra damping it would boom badly. For the crossover I change out all components with specific parts except the woofer inductors. Those are the only things that remain.

Do you have the DV62si speakers?
thanks. i was considering buying a pair for the computer.

what type of damping material did you use?

do you have a photo of the crossover?
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Old 24th March 2013, 10:14 PM   #10
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I used R6.7 Owens Corning fiberglass. I tried many types but the fiberglass proved to be the best. I don't have any pics of the crossover right now. Let me know if/when you get your BICs. These things are already are decent for the money. Modded they are an incredible value.
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