I’ve finally got around to trying different wiring layouts on my dual Tang Band W4-1052sa’s (http://www.greenie512.net/greenie512/html/wip.html ). I’ve used bi-wires speaker sockets with each speaker connected separately to each pair (of the 4).
This allows parallel 4 ohms with the supplied jumpers or serial 8 ohm if I go positive to positive lower – lower negative to upper positive – upper negative – negative out.
Have I got that correct? – I have no measurement gear – and the only advantage I can hear is the 4 ohm set up “seems” more dynamic at the same amp setting. But if I turn the cog up for 8 ohm all remains the same.
I’m using Musical Fidelity amps so 4 or 8 ohm is no bother. Are there other advantages I am missing?? I’m tempted to leave them as 4 ohm.
This allows parallel 4 ohms with the supplied jumpers or serial 8 ohm if I go positive to positive lower – lower negative to upper positive – upper negative – negative out.
Have I got that correct? – I have no measurement gear – and the only advantage I can hear is the 4 ohm set up “seems” more dynamic at the same amp setting. But if I turn the cog up for 8 ohm all remains the same.
I’m using Musical Fidelity amps so 4 or 8 ohm is no bother. Are there other advantages I am missing?? I’m tempted to leave them as 4 ohm.
it depends on your amplifier. in most cases it would be best to put them in series to get 8 ohms. if you put them in parallel the imedance is nomonal 2 ohms. maybe it will go as low as 1 ohm..maybe even less you need a VERY good amp and power supply to work with that.
Greenie, I've been following your work as you have documented on your website and I'm vey impressed. Your cabinet building skills are par excellence. I would think that a guy who knows his tools would spring for a digital multimeter, though.
FYI, if you're paralleling two 4 ohm speakers the amp will see a 2 ohm load. If you wire them in series the amp will see an 8 ohm load. I don't know the specs on your amp but if both wiring configs give you the same sound I would leave them in the series configuration, just to be safe.
Keep up the good work. You raise the bar for my limited carpentry skills.
FYI, if you're paralleling two 4 ohm speakers the amp will see a 2 ohm load. If you wire them in series the amp will see an 8 ohm load. I don't know the specs on your amp but if both wiring configs give you the same sound I would leave them in the series configuration, just to be safe.
Keep up the good work. You raise the bar for my limited carpentry skills.
westend said:
Thanks for the rap - but picture can lie and you never see them of my many (many ...) botchs. But I must say I'm now getting to grips seriously with box making, especially with the more bits of kit I buy to help my relatively unskilled hands.
I stuggle quite a lot when I'm doing my own designs as my electrical knowledge is very limited and I have been avoiding the technical theory stuff out of laziness.
Will run speakers as 8 ohm units. This will be best as once veneered they'll end up on eBay at cost price to fund next project.
Paralle configuration may sound a bit louder because taken the voltage gain being the same, the current is probably four times of that serial configuration, thus the power is four times the power. thus 6db difference. If your power amp is not build to support good 2ohm loading, then the first thing you will notice is lack of bass.
Howdy,
@2ohms the drivers will play at a higher SPL, however, this will also limit the "headroom" of your amplifier. It is much easier to drive an 8ohm load then a 2ohm load. Soncially there is no benifit other then the SPL output of a given driver (thus the design principle). But remember, as you change the load to the x-over (your speakers vrs. their wiring) so goes the responce curve of any given x-over, and hence the need for a DVOM that can test both capacitence (C) and mili-henery's (MH).
@2ohms the drivers will play at a higher SPL, however, this will also limit the "headroom" of your amplifier. It is much easier to drive an 8ohm load then a 2ohm load. Soncially there is no benifit other then the SPL output of a given driver (thus the design principle). But remember, as you change the load to the x-over (your speakers vrs. their wiring) so goes the responce curve of any given x-over, and hence the need for a DVOM that can test both capacitence (C) and mili-henery's (MH).
- Status
- Not open for further replies.