Eminence LAB 15 + Hypex DS8.0
I'll be starting to design and build new subwoofer using Eminence LAB 15 driver and Hypex DS8.0 amp. The design will be sealed box of 35 - 108 litres. The box will be filled with damping materials. Driver is 600/1200W@6ohms and amp is 800W@4ohms.
It will be used purely to music and specially for rock and metal music. My listening room could be something like 16-20 square meters and walls are rock.
Qtc 0.707 is 35 litres F3=59Hz F12=30Hz
Qtc 0.585 is 61 litres F3=60Hz F12=26Hz
Qtc 0.503 is 108 litres F3=63Hz F12=23Hz
At 20Hz those all give pretty much same SPL and higher Qtc gives more SPL at top frequencies.
Anyone else played with the same driver? Given my room and taste of music which size box should I aim? I've heard good words from LAB 12 but nothing from LAB 15.
Happily I got some discounts from these... 🙂
edit: My sealed 50x50x50cm cube is rocking now and I've got some measurements in the end of thread post#54. I'm also interested how an upgrade of enclosure to TH or TQWP might work. I'll start discussing these in the end of thread.
I'll be starting to design and build new subwoofer using Eminence LAB 15 driver and Hypex DS8.0 amp. The design will be sealed box of 35 - 108 litres. The box will be filled with damping materials. Driver is 600/1200W@6ohms and amp is 800W@4ohms.
It will be used purely to music and specially for rock and metal music. My listening room could be something like 16-20 square meters and walls are rock.
Qtc 0.707 is 35 litres F3=59Hz F12=30Hz
Qtc 0.585 is 61 litres F3=60Hz F12=26Hz
Qtc 0.503 is 108 litres F3=63Hz F12=23Hz
At 20Hz those all give pretty much same SPL and higher Qtc gives more SPL at top frequencies.
Anyone else played with the same driver? Given my room and taste of music which size box should I aim? I've heard good words from LAB 12 but nothing from LAB 15.
Happily I got some discounts from these... 🙂
edit: My sealed 50x50x50cm cube is rocking now and I've got some measurements in the end of thread post#54. I'm also interested how an upgrade of enclosure to TH or TQWP might work. I'll start discussing these in the end of thread.
Last edited:
Hi Veke76,
Have you measured the T/S parameters yet? I hope they are close to the spec sheet values.
Regards,
Have you measured the T/S parameters yet? I hope they are close to the spec sheet values.
Regards,
Sorry I don't have equipment to measure T/S parameters. But looking at the site: Speaker Detail | Eminence Speaker I can see at cabinet design.pdf the parameters are already a little bit different with their test driver measured. I used the spec sheet.pdf parameters with simulating in WinISD.
I'm going add 24g/L of damping material in the box so that also changes the volume +20%. So I think I don't have to do more than 90L box.
They don't actually advertise this driver with sealed box but: "Subwoofer suited for small vented boxes and for Horn Loading". Well I'm more into making sealed and passive radiator boxes. I simulated this with 2pcs of CSS APR15 but extra cost didn't add up to me. Specially I'm going the place the subwoofer in the corner of rock walls so the room gain will be effecting the sound output. So I'm wondering which shape of the curves will give the nicest output.
I'm going add 24g/L of damping material in the box so that also changes the volume +20%. So I think I don't have to do more than 90L box.
They don't actually advertise this driver with sealed box but: "Subwoofer suited for small vented boxes and for Horn Loading". Well I'm more into making sealed and passive radiator boxes. I simulated this with 2pcs of CSS APR15 but extra cost didn't add up to me. Specially I'm going the place the subwoofer in the corner of rock walls so the room gain will be effecting the sound output. So I'm wondering which shape of the curves will give the nicest output.
Hi,
Thanks for the additional information. I doubt that you'll notice much of a difference in the range of Q=0.5 to Q=0.7. Probably, building for the larger volume would be a good idea if you have the space.
Regards,
Thanks for the additional information. I doubt that you'll notice much of a difference in the range of Q=0.5 to Q=0.7. Probably, building for the larger volume would be a good idea if you have the space.
Regards,
Just because I love throwing monkey wrenches around...
The Dayton RSS390HF and TIT400 both look like more sub for less dollars but would need larger boxes than the LAB15.
When simulating a sealed enclosure, My suggestion is to pick your alignment such that you won't be leaving any Xmax unavailable within the available amplification, thermal power handling and frequency range you want to use.
In the case of the LAB15, for music perposes, I'd shoot for a Qtc below 0.6 to allow you to hit Xmax without running out of power or power handling.
Regards,
Eric
The Dayton RSS390HF and TIT400 both look like more sub for less dollars but would need larger boxes than the LAB15.
When simulating a sealed enclosure, My suggestion is to pick your alignment such that you won't be leaving any Xmax unavailable within the available amplification, thermal power handling and frequency range you want to use.
In the case of the LAB15, for music perposes, I'd shoot for a Qtc below 0.6 to allow you to hit Xmax without running out of power or power handling.
Regards,
Eric
Hi. If I set max excursion at 18Hz so I get these:
Qtc 0.707 max excursion @ 750W
Qtc 0.585 max excursion @ 410W
Qtc 0.503 max excursion @ 270W
I think I avoid the smallest box. Qtc 0.656 and 42L would give max power 600W
Qtc 0.707 max excursion @ 750W
Qtc 0.585 max excursion @ 410W
Qtc 0.503 max excursion @ 270W
I think I avoid the smallest box. Qtc 0.656 and 42L would give max power 600W
Last edited:
I have measured Lab-15 and there is some differences:
Qt 0,283
Qe 0,299
Qm 5,39
Vas 124 liters
Re 4,88 ohm
Sensitivity (1watt) 90,32
BL 28 N/amp
Mms 300 gram
Le 5,79 🙂eek🙂
A really nice woofer!
Dag
Qt 0,283
Qe 0,299
Qm 5,39
Vas 124 liters
Re 4,88 ohm
Sensitivity (1watt) 90,32
BL 28 N/amp
Mms 300 gram
Le 5,79 🙂eek🙂
A really nice woofer!
Dag
Hi Dag,
That's great to get some real data. Was this on one or more drivers, and new or broken in?
Regards,
That's great to get some real data. Was this on one or more drivers, and new or broken in?
Regards,
I have measured 4, all broken in and very similar data.🙂
I have to say i am impressed with these subwoofers, they are rugged, well made (no vent noise etc) and sound nice in many different boxes.
Dag
I have to say i am impressed with these subwoofers, they are rugged, well made (no vent noise etc) and sound nice in many different boxes.
Dag
Hi Dag,
That gives me hope. I bought 2 when they were on sale, but have not done anything with them yet. Getting measured T/S is really helpful, what was your Fs?
Regards,
That gives me hope. I bought 2 when they were on sale, but have not done anything with them yet. Getting measured T/S is really helpful, what was your Fs?
Regards,
Last edited:
im looking for the new drv for my friend und want to make a fullrange if the bass will ok , but the most of my friend wants the best for the voice more than bass. ok to day ill see the specs of it.🙂
Oh, i forgot that: 25,57Hz
If dont mind 8-10cuft boxes try TH.
If you prefer something smaller, i think it is hard to beat this driver in a 3,5cuft reflex box.🙂
Dag
Thanks for parameters Dag.
Using these suggest that when aiming same Qtc the box could be smaller but to reach same F12 it would require same box size. At 108L the Qtc=0.438...maybe it's too low and will affect sound.
42 - 67L seems now best choice.
Using these suggest that when aiming same Qtc the box could be smaller but to reach same F12 it would require same box size. At 108L the Qtc=0.438...maybe it's too low and will affect sound.
42 - 67L seems now best choice.
Hi Dag,
Thanks for the measured Fs. As far as other enclosure forms are concerned, I have designed a bunch of those on paper. The THs all end up to be rather large when looking at a home theater, much larger than what Veke76 is interested in.
Regards,
Thanks for the measured Fs. As far as other enclosure forms are concerned, I have designed a bunch of those on paper. The THs all end up to be rather large when looking at a home theater, much larger than what Veke76 is interested in.
Regards,
Hi Veke76,
Give yourself lots of internal volume for braces, filling and the driver. In a sealed box it never hurts to have a little extra volume, you can always fill it up later. How high (frequency) do you want to run this?
Regards,
Give yourself lots of internal volume for braces, filling and the driver. In a sealed box it never hurts to have a little extra volume, you can always fill it up later. How high (frequency) do you want to run this?
Regards,
I've done modelling with Google Sketchup and seems to be about 480x480x480mm cube what I end up with. Acoustic volume is at 67L. It has all the braces and amp section on it.
Frequency at normal listening @80Hz and for partying @120Hz
Frequency at normal listening @80Hz and for partying @120Hz
...some sketches...bracing is now at minimum 10mm but I will make it wider...
Edit: uups...bracings at half way is not good...it hits drivers magnet...
Edit: uups...bracings at half way is not good...it hits drivers magnet...
Attachments
Last edited:
- Status
- Not open for further replies.