Made All The Mistakes

[tomo22]

I am from England and this is my fist post so I will Say Hello.
I live in the North east Part of Thailand.
I have purchased Two, Two Way Relatively Nice Looking speakers and want to use for Karaoke.
However they hiss quite a lot which seems to be comming from the Tweeters.
The Woofer is an OBOM Model 12-OB4899, Power 150w. Impedence 8 OHMS,Usable Frequency 30Hz to 2KHz, Aver Sensitivity 97 db, T-O Plate , T-O Coil 45mm. They sit nicely in a large cabinet which is made from 21mm Ply.

The dimensions are as follows. W 14" H 27" D 14" They have a bafle 21" from the top of cabinet made from the same ply. Which extends 9" from the front of the speaker. They have 3 x 3" x 3" Cones in the bottom section.

The woofers are connected direct with no Resistors Capacitors or Inducters connected Connected In Parallel to the Woofer are Two Tweeeters which I have no information for. Except I have used a multimeter which reads 4 Ohms.

Thes are connected inseries si I therfore have a parrell serial set up. In the serial connection is wired a WT 50v 3.3 Micro farad Capacitor.

This would seem to be making a cross over at 6KHz.

Can any one help me in making a few decisions.

These will be used eclusively in the outdoor environment and Top HiFi Quality is no needed However I would like to have something that sounds better than this. I have the Amp Requirment to drive these speakers and also have a 10 Chanel Graphic Equaliser.

I think I need to Scrap the tweeters as I have no information on them and can't get any.

Tweeter specs would help. and crossover levels also.

Thanks and look forward to your responses

P.S I am a fully Qualified electrical Engineer so you can be technical to a certain level because this is a specialist subject.

 

[tomo22]

Thanks for the help

This is the most unhelpfull forum I have ever been on. No responses yet lost of views obviously you think this is just spam. Never mind I have done what I want and they sound very good and people want me to do for there speakers that are the same. As I said I am an engineer so I this over the top speak realy chalanges me Buy For Now.

 

[Johnd]

I replied to your other thread, and have been fighting the urge to respond in this one...I just have to.

Your engineering background can prove useful in these things. But if creating good sound were as simple as combining speakers and a crossover in a box, we would already have perfection, and a robot would be asembing these perfect speakers by the thousands.

Selecting a crossover is not as simple as comparing frequency response from two speakers, and finding a happy medium. You seem to be referring to an active crossover as well (vs. passive)...even more difficult. Sonic, tonal quality can not be qualified until someone actually listens to the product (sound) after the speaker is completed (called r&d @ Paradigm, Hsu, etc.). So my best advice is trial and error (much like I did with my '72 Bonneville in my endless quest to obtain carburetion nirvana with different sizes of needle jets and air/fuel mixtures). It is good that you have resolved the issue. Cheers.