I've a very noob question. I've been a silent reader of the forums. There's tons and tons of knowledge here. I've been very afraid to make a post. But I've hit a road block in the speaker wiring.
My friend has built a 2 channel amp for me from chipamp.com. It is a dual mono kit. I've a workshop over here. I built a box for it from sheet metal. I got 2 pairs of 8" Full range Boston speakers. The specs are,
RMS power 25 watts
Max power 40 watts
Impedance 8 Ohms
SPL @ 1W/1m 93 dB
I did some reading and found out that the amp's output is 68W RMS per channel. So these speakers are a little under powered for the application. I want to use them for the time being. I'm going to build the cabinets myself. Any suggestions on the drawings would be appreciated too. As per my little knowledge if I can wire two speaker in parallel for each channel would that work?
Also, if anyone here can suggest me a which volume control pot to use. It's very difficult to source a good potentiometer here in dual gang option but I can ask my friend to ship it from the USA.
Thank you very much.
My friend has built a 2 channel amp for me from chipamp.com. It is a dual mono kit. I've a workshop over here. I built a box for it from sheet metal. I got 2 pairs of 8" Full range Boston speakers. The specs are,
RMS power 25 watts
Max power 40 watts
Impedance 8 Ohms
SPL @ 1W/1m 93 dB
I did some reading and found out that the amp's output is 68W RMS per channel. So these speakers are a little under powered for the application. I want to use them for the time being. I'm going to build the cabinets myself. Any suggestions on the drawings would be appreciated too. As per my little knowledge if I can wire two speaker in parallel for each channel would that work?
Also, if anyone here can suggest me a which volume control pot to use. It's very difficult to source a good potentiometer here in dual gang option but I can ask my friend to ship it from the USA.
Thank you very much.
Hi,
If they are genuinely 93dB drivers your going to
need a big vented cabinet for 2, tuned to 40Hz.
Stick a coil in series with the lower one, for BSC.
Cannot say much more without decent driver details.
rgds, sreten.
If they are genuinely 93dB drivers your going to
need a big vented cabinet for 2, tuned to 40Hz.
Stick a coil in series with the lower one, for BSC.
Cannot say much more without decent driver details.
rgds, sreten.
The guy whom I bought it from is going to send me drawings for the cabinet.
What do you mean by BSC? Sorry for the noob questions. I don't really understand what do you mean.
Thanks for you help. I really appreciate it.
What do you mean by BSC? Sorry for the noob questions. I don't really understand what do you mean.
Thanks for you help. I really appreciate it.
BSC = Baffle Step Compensation
This site has good tutorials and calculators for the beginner. This other site is more complete, also has tutorials and calculators for all levels. And, this free software, is a great tool to simulate what will happen soundwise with your design.
This site has good tutorials and calculators for the beginner. This other site is more complete, also has tutorials and calculators for all levels. And, this free software, is a great tool to simulate what will happen soundwise with your design.
@sreten
here are some photos of the drivers and it's box. I received them today evening.
[image]http://i.imgur.com/4sIpLHt.jpg[/image]
[image]http://i.imgur.com/N0eocyI.jpg[/image]
[image]http://i.imgur.com/JpJmNr6.jpg[/image]
Again, thanks a lot for all the suggestions.
-ad1tya
here are some photos of the drivers and it's box. I received them today evening.
[image]http://i.imgur.com/4sIpLHt.jpg[/image]
[image]http://i.imgur.com/N0eocyI.jpg[/image]
[image]http://i.imgur.com/JpJmNr6.jpg[/image]
Again, thanks a lot for all the suggestions.
-ad1tya
So, yes, they can be paralleled for nominal Z=(8/2)= 4Ω and the power dissipated would be double ( 80 W )
But....
Acoustically is not a good thing of having two identical full range sources; that's why it's better to let only one reproduce the treble; BSC is from another point of view: the bass sums to bass with no damage. The higher in frequency, the shorter the wavelenght, and they can blend destructively. The use of an equalizer with full tilt on the treble would be a blessing...also because "fullrange" is a vague term...it can mean "100-10 kHz" so having 50 Hz and 15 kHz at -10 dB or so.
But....
Acoustically is not a good thing of having two identical full range sources; that's why it's better to let only one reproduce the treble; BSC is from another point of view: the bass sums to bass with no damage. The higher in frequency, the shorter the wavelenght, and they can blend destructively. The use of an equalizer with full tilt on the treble would be a blessing...also because "fullrange" is a vague term...it can mean "100-10 kHz" so having 50 Hz and 15 kHz at -10 dB or so.
I hear ya. I had a few suggestions from a member of other audio forum. He's used this drivers. Here are the suggestions,
a. standard hi q speaker cabinet - philips design
b. karlson resonator
c. WIBAQ
d. Transmission line speakers.
Out of these four I really liked WIBAQ. A fellow member has already posted full procedure on how to make them on instructables. The only thing bothers me is there size. But as @sreten said the drivers going to need big need vented cabinets.
a. standard hi q speaker cabinet - philips design
b. karlson resonator
c. WIBAQ
d. Transmission line speakers.
Out of these four I really liked WIBAQ. A fellow member has already posted full procedure on how to make them on instructables. The only thing bothers me is there size. But as @sreten said the drivers going to need big need vented cabinets.
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