Basically i want this
But on the cheap.
I have two Volt B2500.1 units and thats it, yes the jbl have 15 inch woofers mine will be the Volt and some sort of 5 inch mid.
Can anybody help with what units would suit the volt, Wimslow advised on ATC or Volt mid but the ATC is over £300 and the volt is over £500 per item!!
cheers
An externally hosted image should be here but it was not working when we last tested it.
But on the cheap.
I have two Volt B2500.1 units and thats it, yes the jbl have 15 inch woofers mine will be the Volt and some sort of 5 inch mid.
Can anybody help with what units would suit the volt, Wimslow advised on ATC or Volt mid but the ATC is over £300 and the volt is over £500 per item!!
cheers
Plugging in the T/S parameters of the Volt 2500.1 to the simulation program......No way are you going to get a big enclosure with anywhere near deep bass. This driver is a poor choice.
The driver models out at Twenty Liters worth of size, (small).
The EBP says ported, I only get an Fb of 46, and a -3Db at 43.31 hertz.( And this is re-tuning for low end)
Plain & simple, this driver really is no good for what your looking for, sorry.
___________________________________________________Rick.............
The driver models out at Twenty Liters worth of size, (small).
The EBP says ported, I only get an Fb of 46, and a -3Db at 43.31 hertz.( And this is re-tuning for low end)
Plain & simple, this driver really is no good for what your looking for, sorry.
___________________________________________________Rick.............
Volt themselves recommend a 70L vented box to give a -3dB point of 35Hz which is fine IMO.
On the whole Volt make very good drivers and I don't think this one is an exception.
I'd probably try this as a mid:Overview.
Note that their published distortion curve is measured at 110dBspl and 28.3V.
I think those two coupled with a dome tweeter in a waveguide would retain a lot of the vibe of those big JBLs in a more living room friendly package.
Might even sound better at sane levels.
On the whole Volt make very good drivers and I don't think this one is an exception.
I'd probably try this as a mid:Overview.
Note that their published distortion curve is measured at 110dBspl and 28.3V.
I think those two coupled with a dome tweeter in a waveguide would retain a lot of the vibe of those big JBLs in a more living room friendly package.
Might even sound better at sane levels.
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Volt B2500.1
Robert xXx,
What are you expecting from this woofer? (please detail)
What I can say,
The alignment that comes together with the driver is very much correct, 20L tuned to 45Hz what gives a port about 7.5cm and length 27cm, F-3 dB ~42 Hz. Now, first the round port needs to be wider about 9/10cm diam. what gives for a diam. of 9.7cm (internal) with a length of 47cm. Second, the driver has a good - Maximum Excursion 25 mm (before damage) - what is a good protection for the max excursion - use it carefully - having in mind that with freqs. lower than 30Hz and excursion@20Hz being at a max of 15/20mm for a power of ~110 W@8 Ohms, having the risk of damaging the driver motor. The speaker enclosure is supposedly also o good protection with good dimensioning and control of the parameters like the speaker alignment.
Volt B2500 1 Bass Unit
http://www.diyaudio.com/forums/subwoofers/120592-volt-b2500-1-enclosure.html
You can also look at the pages of others diy'ers for inspiration of the monitor type speaker you r looking 4.
PRELUDE
Yamaha-NS1000
Robert xXx,
What are you expecting from this woofer? (please detail)
What I can say,
The alignment that comes together with the driver is very much correct, 20L tuned to 45Hz what gives a port about 7.5cm and length 27cm, F-3 dB ~42 Hz. Now, first the round port needs to be wider about 9/10cm diam. what gives for a diam. of 9.7cm (internal) with a length of 47cm. Second, the driver has a good - Maximum Excursion 25 mm (before damage) - what is a good protection for the max excursion - use it carefully - having in mind that with freqs. lower than 30Hz and excursion@20Hz being at a max of 15/20mm for a power of ~110 W@8 Ohms, having the risk of damaging the driver motor. The speaker enclosure is supposedly also o good protection with good dimensioning and control of the parameters like the speaker alignment.
Volt B2500 1 Bass Unit
http://www.diyaudio.com/forums/subwoofers/120592-volt-b2500-1-enclosure.html
You can also look at the pages of others diy'ers for inspiration of the monitor type speaker you r looking 4.
PRELUDE
Yamaha-NS1000
I to did a vented port simulation. This Volt B2.5001 has a ridicolous strong motor. I used AJ-horn which does simulate vented including the voice coil inductance. With a 0.3 Ohm series resistance for the inductor in series with this driver (part of the crossover) i get a maximum volume of 10 liters for a flat response. -3dB 43 Hz. That's not bad at al given the volume. The stuff hits the fan, when you look at the port lengt. 8cm diameter and 68 cm long. Transmissionline effect and heavy resonance sets in from 250 Hz. So you would need a passive radiator to make this already expensive woofer function in a vented enclosure at all.
Another thing, the mechanical resistance of the Volt is extremly high 11.03 Rms. To simplify, you needs tons of power and volume to get some live out of it. It's an extremly damped driver.
Could the topic starter tell what he likes about the Jbl? Appearance?
given the volume. The stuff hits the fan, when you look at the port lengt. 8cm diameter and 68 cm long. Transmissionline effect and heavy resonance sets in from 250 Hz. So you would need a passive radiator to make this already expensive woofer function in a vented enclosure at all. Another thing, the mechanical resistance of the Volt is extremly high 11.03 Rms. To simplify, you needs tons of power and volume to get some live out of it. It's an extremly damped driver.
Could the topic starter tell what he likes about the Jbl? Appearance?
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Quested use that Volt driver in their highly regarded V3110 mid-field monitor.
Total volume of those (outside measurements) is about 82L so I would assume that they are closer to the 70L internal volume Volt suggests. Quested states a response of 30Hz-20k +-2dB. They are supposed to work quite well at low(ish) volumes ie no worse than any other ported speaker.
I plugged the parameters into a simple online box calculator and adjusted the internal volume to 70L (the calculator itself suggested something 9L with an F3 of 57Hz) and it gave an F3 of 22Hz with a response 'peak' of -5.8dB.
Generally Volt drivers do not model well in box calculators but if you get them right they do sound sublime. You may need to play with the port length or diameter for a while to get there though as simulators are of very little help here.
Total volume of those (outside measurements) is about 82L so I would assume that they are closer to the 70L internal volume Volt suggests. Quested states a response of 30Hz-20k +-2dB. They are supposed to work quite well at low(ish) volumes ie no worse than any other ported speaker.
I plugged the parameters into a simple online box calculator and adjusted the internal volume to 70L (the calculator itself suggested something 9L with an F3 of 57Hz) and it gave an F3 of 22Hz with a response 'peak' of -5.8dB.
Generally Volt drivers do not model well in box calculators but if you get them right they do sound sublime. You may need to play with the port length or diameter for a while to get there though as simulators are of very little help here.
A nice and inexpensive 5" midrange driver:
LF Pressed Chassis / Ferrite - TF0510 - Celestion - Guitar, Bass & Pro Audio Speakers
LF Pressed Chassis / Ferrite - TF0510 - Celestion - Guitar, Bass & Pro Audio Speakers
Might be ok but I'd feel like I'd be short-changing one of the best 10" woofers available with a 5" Celestion pressed steel chassis which costs about 1/12th of the woofer.
Nannoo and Charles,
We are all talking about this driver? Volt Loudspeakers - B2500.1
Fs 25 Hz
Vas 51
Qms 1.4
Qes 0.25
Qts 0.21
Sd 299 cm2
Le 0.8 mH
Red is 10 liters = as big as a flat ported design allows, above 10 liters the saddle sets in. Black is 70 liters port lenght best i could make of it. Diameter port 8 cm.
Either we are talking about a whole other chassis. Or there is something really funky going on.
We are all talking about this driver? Volt Loudspeakers - B2500.1
Fs 25 Hz
Vas 51
Qms 1.4
Qes 0.25
Qts 0.21
Sd 299 cm2
Le 0.8 mH
Red is 10 liters = as big as a flat ported design allows, above 10 liters the saddle sets in. Black is 70 liters port lenght best i could make of it. Diameter port 8 cm.
An externally hosted image should be here but it was not working when we last tested it.
Either we are talking about a whole other chassis. Or there is something really funky going on.
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Robert,
Do you want the appearance of the JBL? And how stuck are you on this driver. Are you sure it is this type of Volt driver you have? Celestion 5 inch driver is a good budget middriver Topicstarter said he wanted a budget version....
In full tilt "somebody is wrong on the internet modus" no offense ment.
Do you want the appearance of the JBL? And how stuck are you on this driver. Are you sure it is this type of Volt driver you have? Celestion 5 inch driver is a good budget middriver
Topicstarter said he wanted a budget version....In full tilt "somebody is wrong on the internet modus" no offense ment.
Yeah, that's the one.
For reasons beyond my understanding most if not all Volt drivers do quite badly in practically all modelling programs I tried. Textbook alignments don't seem to work with them. I'd just go with the 70L with a 7.5cm port that is 11cm long as per their recommendation or try and get the port measurements off some VS3110s.
I use a Volt RV3143 in a T/L which in real life and after some time fiddling with the stuffing etc performs substantially better than any modelling suggested.
In the end I largely reverse-engineered PMCs XB2 sub.
One nice thing I found with Volts I've heard is the seemingly unlimited amount of head room. They never sound different or strained in any way regardless if the get fed 1W or a couple of hundred.
For reasons beyond my understanding most if not all Volt drivers do quite badly in practically all modelling programs I tried. Textbook alignments don't seem to work with them. I'd just go with the 70L with a 7.5cm port that is 11cm long as per their recommendation or try and get the port measurements off some VS3110s.
I use a Volt RV3143 in a T/L which in real life and after some time fiddling with the stuffing etc performs substantially better than any modelling suggested.
In the end I largely reverse-engineered PMCs XB2 sub.
One nice thing I found with Volts I've heard is the seemingly unlimited amount of head room. They never sound different or strained in any way regardless if the get fed 1W or a couple of hundred.
Hi Charles,
This is 70 liter, 11 cm port lenght, 7.5 cm diameter. I really don't know what to say. The Volt Enclosure fly's against all sense and physics i have seen. Or maybe one of the TSP is really of? Qms not 1.4 but 14.0? I have both build lot's of TL's and BR's with Aj-horn (the simprogram) i trust Aj-Horn a lot. The impedance plot is enough for me to get my stomach really upset. There has to be some middleground...
This is 70 liter, 11 cm port lenght, 7.5 cm diameter. I really don't know what to say. The Volt Enclosure fly's against all sense and physics i have seen. Or maybe one of the TSP is really of? Qms not 1.4 but 14.0? I have both build lot's of TL's and BR's with Aj-horn (the simprogram) i trust Aj-Horn a lot. The impedance plot is enough for me to get my stomach really upset. There has to be some middleground...
An externally hosted image should be here but it was not working when we last tested it.
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Here is some info about Rms of the suspension, interview with Joachim Gerhard on Speakerbuilding. Last paragraph.
SpeakerBuilding.com - Interview with Joachim Gerhard of Audio Physic, Page 1
SpeakerBuilding.com - Interview with Joachim Gerhard of Audio Physic, Page 1
Robert,
Do you want the appearance of the JBL? And how stuck are you on this driver. Are you sure it is this type of Volt driver you have? Celestion 5 inch driver is a good budget middriver
In full tilt "somebody is wrong on the internet modus" no offense ment.
I think all the OP said was that £300 for an ATC dome or £500 for a Volt are too much.
For £90 I still think the BMS 5" I linked to might be worth a try.
Coupled with a waveguided tweeter (like in this thread: http://www.diyaudio.com/forums/multi-way/241286-my-first-wave-guide-speaker-lots-pics.html) you can end up with a speaker that can reach high SPLs with very little distortion.
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