Other News (Demo Coming Very Soon)
We’ve been doing our best but we haven’t had the chance to finish the demo yet. We have started filming and we will be finished very soon.
But don’t worry, we won’t leave this update blank.
The last few weeks have given us another chance to assess just where the FS-X is in terms of performance. And in advance of the demo/comparison video (with the JBL Charge2 and the Bose Soundlink Mini), we wanted to share some of the information we’ve put together. We hope this will clear things up, especially for those of you who a little less tech savvy as others might be...
Overall, in the final phase of tuning, the FS-X it seems, has gone to another level.
- More volume than we promised
- More bass than we promised
- More playtime than we promised
- More standby time than promised
- Lower noise floor than we promised
We’ve talked a lot about max SPL of >100dB, but we feel we need to spend some more time explaining exactly how power and performance work with the FS-X.
First of all, Max SPL volume, has come out higher than we expected. And that doesn't seem to have been at the expense of battery draw. Raw Max SPL was peaking at around 93 dB, @ 0.5 metre, we are now getting values up above the 100 dB level @ 1 metre.
Here's a screenshot with average level music taken at 1 metre. “Average”, that is, in terms of the amount of energy in the music. For the demo we are testing music from different genres - some of which were suggested by you backers in Update #50 - to demonstrate the FS-Xs capability of mastering sound at different energy levels.
Please note: don’t be fooled by the middle and right hand side figures. The display retains the max dB (left hand side), whereas the current dB (middle) and peak (right hand side) reading continue to jump about as the track progresses.
The last phase of tuning has revolved around whether and how far, to dial back max volume. Obviously more dB is better. But if getting an extra 1/2 dB means significantly reducing battery life, it wouldn’t be worth it. So we’ve been taking our time to find the ‘sweet spot’.
Playing continuously at max volume, would of course drain the battery at a much quicker pace (maximum peak is at 3A for 10ms. We haven't found actual tracks that do this and it’s very unlikely you will too, but if you played the highest power draw music continuously (pure, continuous noise), theoretically you would drain the battery in around 12 hours.
Unlike other speakers, the FS-X tracks the music being played and tunes the amp and driver in real time to deliver the best result. The software looks at the energy level in your music, then computes how to tune the matched amplifier and driver to achieve the best possible result, with the least amount of energy - giving you the best possible sound with the most amount of playtime.
Check out the short video below, demonstrating how the software is working to tune the amp and driver. On the left is the current draw and on the right is the voltage. Notice as the music is playing, both values change.
For this particular music, at this volume, the draw average is around 60ma (0.06) and SPL is on average, around 90dB at 1 metre. We could easily achieve almost 50 hours playtime from this (2800ma / 60ma ~ 46+ hours).
So how much playtime you get from the battery depends on the volume AND the type of music being played. And the envelope does seem to be wider than we thought. Before we were looking at 50 hours @ 70 dB (40 from Bluetooth, 10 from cable). Now it’s possible to get almost 50 hours @ 90 dB (on either Bluetooth or cable). This is a whole lot more volume than before, for the same playtime. Dialling back to 70dB (what most see as the outer extreme of the "comfort zone") will obviously see a big increase in playtime than what it was.
The FS-X has become an extremely efficient sound system where advanced digital signal processing and filtering combine to balance the AMP and the driver in real time, to provide the highest quality digital sound. All from a tiny battery, with an extremely long playtime.
As always thanks for your support, here’s an updated timeline with our projections.
Remember: we extended our projections to counteract any possibility of unforeseen slippage, we are still on target for delivery.
We'll share the demo video with you in a new update, next week. The next update after that will be no later than Thursday 16th April 2015.
All the best,
The Frankenspiel Team