Hi all, how are you? i want to know what you think about this combination for a PA speaker?
Woofer:
Sensitivity: 92dB (W/M)
Impedance: 8ohm
Re: 6.8ohm
Le: 0.989mH
Frequency response:
45Hz~6KHz
Fs: 68Hz
Qts: 0.56
Qes: 0.69
Qms: 3.3
Vas: 10.86 liters
Xmax: 5.4mm
Tweeter:
1/2" mylar dome shielded tweeters:
Low mass Mylar dome extends response:
Phase correction faceplate also protects diaphragm:
Includes bypassable 2.2Ω, 5 watt padding resistor:
Magnetically shielded ceramic motor:
1/2" diameter dome for superior off-axis response:
Specifications:
Power handling-30 watts RMS/60 watts max (with 6,000 Hz 12 dB/octave crossover):
VCdia-1/2":
Impedance-8 ohms:
Re-8.27 ohms:
Frequency response-6,000-20,000 Hz:
Fs-3,500 Hz:
SPL-88 dB 1W/1m:
Crossover:
500 Watts RMS Power Rating
8 ohm impedance
Crossover point at 3400 Hz.
12 dB Octave Slope
Note: Should i remove the 2.2Ω, 5 watt padding resistor from the tweeters?
Woofer:
Sensitivity: 92dB (W/M)
Impedance: 8ohm
Re: 6.8ohm
Le: 0.989mH
Frequency response:
45Hz~6KHz
Fs: 68Hz
Qts: 0.56
Qes: 0.69
Qms: 3.3
Vas: 10.86 liters
Xmax: 5.4mm
Tweeter:
1/2" mylar dome shielded tweeters:
Low mass Mylar dome extends response:
Phase correction faceplate also protects diaphragm:
Includes bypassable 2.2Ω, 5 watt padding resistor:
Magnetically shielded ceramic motor:
1/2" diameter dome for superior off-axis response:
Specifications:
Power handling-30 watts RMS/60 watts max (with 6,000 Hz 12 dB/octave crossover):
VCdia-1/2":
Impedance-8 ohms:
Re-8.27 ohms:
Frequency response-6,000-20,000 Hz:
Fs-3,500 Hz:
SPL-88 dB 1W/1m:
Crossover:
500 Watts RMS Power Rating
8 ohm impedance
Crossover point at 3400 Hz.
12 dB Octave Slope
Note: Should i remove the 2.2Ω, 5 watt padding resistor from the tweeters?
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Hi,
I'm going to guess that you're new to speaker design, so here's some articles to read through.
PA speakers often need to produce very high SPLs, so an initial sensitivity of 92dB@1w is on the low side: you should be looking for 95dB or higher. Remember that 3dB gain requires a double in power, so the 92dB speaker at 200w will be roughly as loud as a 95dB speaker at 100w.
The tweeter you've chosen isn't close to the right thing for the job, I'm afraid: its sensitivity is low due to its small size (compression drivers often come in at over 100dB@1w). The power rating indicates it'll do around 100dB at 1m away before melting, if you use it in its specified frequency range.
Your crossover would feed another octave of signal to the tweeter, lowering its power handling massively: it wouldn't keep up with the woofer!
IMHO, start from scratch, pick your goals, and find out what's needed to do that.
A lot of people like the Eminence coaxials, which would be a useful budget PA speaker option (no need to buy a horn) and would clearly outperform the speaker you've specified here.
Chris
I'm going to guess that you're new to speaker design, so here's some articles to read through.
PA speakers often need to produce very high SPLs, so an initial sensitivity of 92dB@1w is on the low side: you should be looking for 95dB or higher. Remember that 3dB gain requires a double in power, so the 92dB speaker at 200w will be roughly as loud as a 95dB speaker at 100w.
The tweeter you've chosen isn't close to the right thing for the job, I'm afraid: its sensitivity is low due to its small size (compression drivers often come in at over 100dB@1w). The power rating indicates it'll do around 100dB at 1m away before melting, if you use it in its specified frequency range.
Your crossover would feed another octave of signal to the tweeter, lowering its power handling massively: it wouldn't keep up with the woofer!
IMHO, start from scratch, pick your goals, and find out what's needed to do that.
A lot of people like the Eminence coaxials, which would be a useful budget PA speaker option (no need to buy a horn) and would clearly outperform the speaker you've specified here.
Chris
oh thank you, im just asking because i already have these components laying around and wanted to put them together. Was thinking of making a little box for my room. Planing to use like 30 watts amp. But i see that there isnt any workaround. Or i could buy a new tweeter with better spl?
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Hmmm...
Go for a 5kHz crossover and some BSC (check the articles I posted). That'll get you somewhere near.
Chris
Go for a 5kHz crossover and some BSC (check the articles I posted). That'll get you somewhere near.
Chris
Hi,
I'm assuming the bass unit is small, and both drivers
are not suitable for PA use in any sense. Probably
be fine though as as a small cheap speaker.
The secret to using those tweeters is they often
form a decent 3rd order acoustic roll-off with
just a series cap or 4th order with just LC.
The difficulty is matching the bass unit to it.
http://audio.claub.net/Simple Loudspeaker Design ver2.pdf
http://www.rjbaudio.com/Audiofiles/FRDtools.htm
rgds, sreten.
I'm assuming the bass unit is small, and both drivers
are not suitable for PA use in any sense. Probably
be fine though as as a small cheap speaker.
The secret to using those tweeters is they often
form a decent 3rd order acoustic roll-off with
just a series cap or 4th order with just LC.
The difficulty is matching the bass unit to it.
http://audio.claub.net/Simple Loudspeaker Design ver2.pdf
http://www.rjbaudio.com/Audiofiles/FRDtools.htm
rgds, sreten.
So, what size is the woofer? The larger its diameter, the lower the crossover point needs to be for a smooth power response. Theoretically, at 3.4kHz, a matching woofer size would be about 4" diameter, and no larger than 5". If it's just for personal listening & you're not trying to cover a large space, maybe you can get away with a 6.5" driver.
Hi, thanks for your responses, the driver is an 8". I didnt know that the cossover point has a relation with the drivers diameter. I have heard that people use this driver for 4x8 bass guitar cabs too. I was thinking on removing a tweeter from a broken speaker that im not using. It has the same spl of the woofer and the freq range starts below the crossover point.
Tweeter:
2000 - 20,000 Hz Frequency Range
100 Watts RMS & 200 Watts Max
92dB
8oz Magnet
Cut Size is 3.375"
Mounting Depth is 1"
This Listing and Price is for 1 Tweeter
Tweeter:
2000 - 20,000 Hz Frequency Range
100 Watts RMS & 200 Watts Max
92dB
8oz Magnet
Cut Size is 3.375"
Mounting Depth is 1"
This Listing and Price is for 1 Tweeter
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