Speaker gurus, little help....

Without expressing any opinion about the appropriateness of the driver swap, I do observe that you're replacing 4-ohm drivers with 16-ohm ones; I presume you know that you'll have to change out the speaker wiring from series-parallel to purely parallel connections. That will give you a 4-ohm total cabinet impedance. Leaving the wiring as is will result in a 16-ohm total impedance.

Otherwise, your presumption that it reduces the nominal total power handling capacity to 600 watts is correct.

 

You'll possibly end up with less volume.

Maybe @agedhorse or @Wasnex might stop by.

 

Are you sure you'll end up with less volume? I guess it's a bit complicated because one driver is 16 ohms and the other is 4 ohms.

Here the way I think it works. Per the data sheets, the sensitivity off each driver is given at 1W/1M. But after you hook them up it works out so the cab provides a 4 ohm load and the power is split evenly between all four drivers. So if you feed 4W to a cab loaded with 16 ohm SC10s connected in parallel, each driver will make 94.3dB (because each driver gets 1W. Or, if the cab is loaded with 4 ohm BP102s connected in series/parallel, each driver will make 90.5dB.

As far as the sound being the same with both drivers. I don't think this will be the case. At the most basic level, the frequency response plots suggest a different tonal balance. I would also be interested to know how the low frequency response of each driver models in the cab; I.E. how deep the response goes and also how well damped the sound will be. Unfortunately, that's over my head. Perhaps @Rick James or @agedhorse will comment.

 

The speakers in there now might not be as good as they could be in a sealed cab, but the ones you are thinking of might do better. Qts looks more favorable for a sealed cab on the proposed model. Not by a lot, the Fs is higher as well, so definitely expect a different voice.

Meh 4 ohm is 4 ohm. Amp dont care if it is series/parallel or parallel.

 

Such efforts tend to become a fail in the long run. You will be left with four perfectly fine drivers hanging about.

You would be better off selling what you have and then purchasing a different but lighter product.

 

What is your sound goals?

You'll likely get a different sound performance (extended midrange content) with the Basslite drivers

 

All parallel improves thermal handling.
And any whoopsie doos you don't loose 2 drivers like series parallel. superior design for sure

Anyhoo. Sealed cabinet is lots of fun
And sensitivity will go up a little. With these drivers
I don't see any worries.

Should be fun

Sealed 4x12 would be fun too. Same type driver n cost. Alot punch and sensitivity. With the stamped neo Basslite 2012

I almost did same thing your doing wanted use the Basslite 10s. All 16 ohm.

Think I do remember the10" 8 ohm drivers having more sensitivity. And the extra 2dB is a okish idea actually just running series parallel. Even at 8ohms the sensitivity doesn't scream for to many watts. So almost benificial to use the higher sensitivity driver. Not worrie about max watts with the amp at 4 ohms.

 

Everything you could possibly want to know as far as the low frequency comparison between the BP102 and the SC10 in your cab would be shown by modeling them in WinISD 0.7, and the mid and high frequency comparisons are seen on the response charts of the data sheets. Absolutely no guess work or 'what do you think' required. The BP102s and SC10s are very close in low frequency response and sensitivity, but the 4.4mm xmax of the SC10 compared to the 6.2mm xmax of the BP102 means the SC10 will only take about 60w each before exceeding mechanical limits, while the BP102 will take about 100w each.