2 DR250 build - Europe Materials
Posted: Sun Dec 14, 2025 3:19 am
After figuring out some Questions upfront, i decided to start the build thread for others to comment and see whatever they feel a need to.
Some results of the questions before starting:
- Handle in the back with angled sunken connectors, connectors for BI-Amping and chaining two cabs (so 4 connectors). Optional passive crossover module could be fitted inside the handle, connected to the input-connector, and leaving a flush connector outside the backpanel.
I will go for bi-amping including passthrough, so i will have four connectors on each cab. Will be slightly bigger to fit everything in, but i will take that for the first build.
Back panel is thicker then needed/recommended in that situation, to have the handle not falling apart when grabbing it/strapping it there.
Wood Quality:
I was going for the Birch Plywood in 12mm as recommended, but the other option is a combination of poplar and eucalyptus, 7 "true" plies, which brings down the cost by a lot.
Wood cutlist:
I can highly recommend www.opticutter.com (limited to 20 different panels in the free version); esp due to the option to export as dxf to further optimize for all CAD-Users. The Link in the plans does lead somewhere into the darkness.
By that optimisation i need one sheet of 4/8 feet (in global units, 2500*1250mm) per cab, and have more then enough spare. By the price of the poplar/eucalyptus, the wood needed per one cab comes down to 72,53€ per cab for the 12mm/half-inch needed.
PU-Glue:
As PL-Premium is not available here (i assume by the chemical components, it would be illegal due to regulations here?) i went for the latest i could find with a reasonable pricing; Soudal PU glue from the supplier collection thread here.
Foams, is available and, compared to other solutions matching that, a cheap variant.
10" Driver:
Very useful database imho: https://loudspeakerdatabase.com/search/ ... %89%A450.0
here added the parameters from the plan to get an overview. Not at all a complete list, but gives you a range.
With maximum output in the low-end (and european availability) in mind i'm on to choose the LaVoce WAF(or WAN)102.50 (slightly out of specs by the Vas below 25l as the WAN as well; link for that specs included: https://loudspeakerdatabase.com/search/ ... %89%A450.0)
The WAN comes with a slightly higher pricing in germany, the question for me is if the specs will have an effect that would be worth it? Weight difference is obvious, but i don't really care about that weight.
WAF has a way higher Xmax? Higher power handling? Lower Fs, that will not be needed, but anyway? Vas closer to ideal? Weight aside, i don't see the benefit of the neo-variant.
My bad, compared to the discontinued WAF102.52.
WAN has the higher power taking of 100W, and increased 1b sensitivity. WAF slightly lower Fs, but not used anyway.
Anyone compared these two in theory (simulation) or used both?
These are my results getting quick prices:
(Total costs for 2 cabs on the right)
Not sure if the price of the driver goes linear with the quality at the end, any tips?
HF-section:
European problem, in the end the piezo-version would be more expensive sadly.
To the monacor-recommendation: There are two available, i assume it is about the model MPT-016 and not the MPT-025?
Needing 20 per box, or 50 in total to sort out the bad ones, that comes in quite expensive at 8,94€ per piece.
Probably i'll end up in the future with a combination of piezo and cd stacked on top of each other, but for the first build i was aiming at the cd version. The ones i can order from here are the 1001 and the LaVoce-Option; not quite sure about the benefits of these compared to each other? PRV would be import-able somewhat, not sure about the final costs then.
Price comparison as well:
(Total costs for 2 cabs on the right)
Same as to the LF drivers, any tips?
If it's worth it, I'm more then willing to spend on it...but i can not guess about the real worth vs. the pricing. The better dispersion of the melded piezo array in closer range makes me think about going that way. LF no idea beyond not going the cheapest way.
High SPL and low distortion would be the criteria, weight not that much. Also the final result when playing with subs should give me a kick i can feel...will never be used without subs. Sub yet to choose.
Processing:
For now i aim at active xo, driverack PA2 it is (the wifi-connected remote control is the deciding point and worth the buck for me). Amps not sure yet, for testing i have some hifi-amps that will do the trick.
Cab for now one per channel, chainable in 2 per amp-channel with the first one built the linking one. The Addition will only need inputs; and then there has to be another chain like that for the future if i'm going to extend to 6 or 8 in total.
For now I'll start with the CD version (if not convinced otherwise). When the first pair is done, i'll think about the piezo-variant; maybe as the next extension. In the end having two piezos (bottom) and two CD (top) stacked should have a coverage of all needs, be probably way to much already.
also three or more together should equal in a quite flat response by design. As the LF with 8 ohm would be wired parallel with two cabs result in 4ohm when linked; same goes for the two CD that are wired to give an 8ohm per cab. So each channel will see 8 ohm when bi-amped one cab, and 4 ohm when bi-amped two cabs in parralell. Limiter presets to be set accordingly.
For chaining of a CD and piezo cab i will need to go for xo in the amp, or switch to passive xo inside the cab. Not sure yet, i will see. Probably two CD-units chained, and one piezo with passive xo on a seperate amp?
The plan:
Drivers still to choose, but on monday i think i'll find the time to get the wood and start building the interieur. When the baffle needs the screw-in holes for the LF driver, the driver has to be here...but that is as far as i can go for now.
So any hints on Driver choice will be highly appreciated
Edit: My uneducated guess would be to go for the combination, LaVoce WAN102.50 for maximum output and the HF CD LaVoce DF10.142LK for the lower Crossover option. Maybe I'll just take the risk and get this combination, to gather everything befor the yearly shutdown so I can use that time to hopefully build it. Any errors on that guess i don't see?
Some results of the questions before starting:
- Handle in the back with angled sunken connectors, connectors for BI-Amping and chaining two cabs (so 4 connectors). Optional passive crossover module could be fitted inside the handle, connected to the input-connector, and leaving a flush connector outside the backpanel.
I will go for bi-amping including passthrough, so i will have four connectors on each cab. Will be slightly bigger to fit everything in, but i will take that for the first build.
Back panel is thicker then needed/recommended in that situation, to have the handle not falling apart when grabbing it/strapping it there.
Wood Quality:
I was going for the Birch Plywood in 12mm as recommended, but the other option is a combination of poplar and eucalyptus, 7 "true" plies, which brings down the cost by a lot.
Wood cutlist:
I can highly recommend www.opticutter.com (limited to 20 different panels in the free version); esp due to the option to export as dxf to further optimize for all CAD-Users. The Link in the plans does lead somewhere into the darkness.
By that optimisation i need one sheet of 4/8 feet (in global units, 2500*1250mm) per cab, and have more then enough spare. By the price of the poplar/eucalyptus, the wood needed per one cab comes down to 72,53€ per cab for the 12mm/half-inch needed.
PU-Glue:
As PL-Premium is not available here (i assume by the chemical components, it would be illegal due to regulations here?) i went for the latest i could find with a reasonable pricing; Soudal PU glue from the supplier collection thread here.
Foams, is available and, compared to other solutions matching that, a cheap variant.
10" Driver:
Very useful database imho: https://loudspeakerdatabase.com/search/ ... %89%A450.0
here added the parameters from the plan to get an overview. Not at all a complete list, but gives you a range.
With maximum output in the low-end (and european availability) in mind i'm on to choose the LaVoce WAF(or WAN)102.50 (slightly out of specs by the Vas below 25l as the WAN as well; link for that specs included: https://loudspeakerdatabase.com/search/ ... %89%A450.0)
The WAN comes with a slightly higher pricing in germany, the question for me is if the specs will have an effect that would be worth it? Weight difference is obvious, but i don't really care about that weight.
WAF has a way higher Xmax? Higher power handling? Lower Fs, that will not be needed, but anyway? Vas closer to ideal? Weight aside, i don't see the benefit of the neo-variant.
My bad, compared to the discontinued WAF102.52.
WAN has the higher power taking of 100W, and increased 1b sensitivity. WAF slightly lower Fs, but not used anyway.
Anyone compared these two in theory (simulation) or used both?
These are my results getting quick prices:
Not sure if the price of the driver goes linear with the quality at the end, any tips?
HF-section:
European problem, in the end the piezo-version would be more expensive sadly.
To the monacor-recommendation: There are two available, i assume it is about the model MPT-016 and not the MPT-025?
Needing 20 per box, or 50 in total to sort out the bad ones, that comes in quite expensive at 8,94€ per piece.
Probably i'll end up in the future with a combination of piezo and cd stacked on top of each other, but for the first build i was aiming at the cd version. The ones i can order from here are the 1001 and the LaVoce-Option; not quite sure about the benefits of these compared to each other? PRV would be import-able somewhat, not sure about the final costs then.
Price comparison as well:
- Screenshot 2025-12-14 080720.png (9.59 KiB) Viewed 74 times
Same as to the LF drivers, any tips?
If it's worth it, I'm more then willing to spend on it...but i can not guess about the real worth vs. the pricing. The better dispersion of the melded piezo array in closer range makes me think about going that way. LF no idea beyond not going the cheapest way.
High SPL and low distortion would be the criteria, weight not that much. Also the final result when playing with subs should give me a kick i can feel...will never be used without subs. Sub yet to choose.
Processing:
For now i aim at active xo, driverack PA2 it is (the wifi-connected remote control is the deciding point and worth the buck for me). Amps not sure yet, for testing i have some hifi-amps that will do the trick.
Cab for now one per channel, chainable in 2 per amp-channel with the first one built the linking one. The Addition will only need inputs; and then there has to be another chain like that for the future if i'm going to extend to 6 or 8 in total.
For now I'll start with the CD version (if not convinced otherwise). When the first pair is done, i'll think about the piezo-variant; maybe as the next extension. In the end having two piezos (bottom) and two CD (top) stacked should have a coverage of all needs, be probably way to much already.
also three or more together should equal in a quite flat response by design. As the LF with 8 ohm would be wired parallel with two cabs result in 4ohm when linked; same goes for the two CD that are wired to give an 8ohm per cab. So each channel will see 8 ohm when bi-amped one cab, and 4 ohm when bi-amped two cabs in parralell. Limiter presets to be set accordingly.
For chaining of a CD and piezo cab i will need to go for xo in the amp, or switch to passive xo inside the cab. Not sure yet, i will see. Probably two CD-units chained, and one piezo with passive xo on a seperate amp?
The plan:
Drivers still to choose, but on monday i think i'll find the time to get the wood and start building the interieur. When the baffle needs the screw-in holes for the LF driver, the driver has to be here...but that is as far as i can go for now.
So any hints on Driver choice will be highly appreciated
Edit: My uneducated guess would be to go for the combination, LaVoce WAN102.50 for maximum output and the HF CD LaVoce DF10.142LK for the lower Crossover option. Maybe I'll just take the risk and get this combination, to gather everything befor the yearly shutdown so I can use that time to hopefully build it. Any errors on that guess i don't see?