Hello,
i recently bought a MiniRig 4 (minirigs.co.uk)
probably the most analog sounding commercial bluetooth speaker i tried so far, but im wondering, could i 3d print something to get deeper bass or enhance the enclosure? im not really looking for a overall volume increase, but an actual low end extension (even just 5-10Hz) or reduction of some resonances....
i could also design a holder/second enclosure with some micro perforated panels (helnholtzresonators) if it would be beneficial
1. placing the speaker in a cardbox board (orsomething 3d printed which is tunneling air from the back of the speaker to to front) seems to also increase bass in relation to the other frequencys, tho im unsure if i can get really deeper bass here without an very large box, it seemed to boost specially the region that is already quite present
2. if lower bass extension is not possible, i would atleast look at reducing some resonances as the cabinet is quite heavly vibrating, might be able to load up REW again to do some measurements what could be improved (imo the biggest bump is around 80-120Hz, while extension goes down to about 60hz)
Any Ideas here?
i recently bought a MiniRig 4 (minirigs.co.uk)
probably the most analog sounding commercial bluetooth speaker i tried so far, but im wondering, could i 3d print something to get deeper bass or enhance the enclosure? im not really looking for a overall volume increase, but an actual low end extension (even just 5-10Hz) or reduction of some resonances....
i could also design a holder/second enclosure with some micro perforated panels (helnholtzresonators) if it would be beneficial
1. placing the speaker in a cardbox board (orsomething 3d printed which is tunneling air from the back of the speaker to to front) seems to also increase bass in relation to the other frequencys, tho im unsure if i can get really deeper bass here without an very large box, it seemed to boost specially the region that is already quite present
2. if lower bass extension is not possible, i would atleast look at reducing some resonances as the cabinet is quite heavly vibrating, might be able to load up REW again to do some measurements what could be improved (imo the biggest bump is around 80-120Hz, while extension goes down to about 60hz)
Any Ideas here?
Give the driver a run on DATS or the REW way of pulling up the T/S
1) Take the back off and using a tubular extension, mess with internal volume increase as well as a passive radiator on the back
2) Don't take the back off, use a tubular extension to create a second back chamber. Fit a lil Tang Band or similar sub in that
3) Remove internals and fit into a larger new enclosure with a better FR driver or 2-way
The internal pre/amp may not be sending lower bass to the stock driver, so measure those speaker leads frequency response. If it is sending low bass and the stock driver just not able to use it, try a passive x-over to send the lower bass to the second driver. Or, pick up the signal from the speaker leads and convert to line level to feed a monoblock sub style TPA3116D2 board that already has a sub filter and bass adjust knobs. The good boards are 2R capable and since you don't seem to mind a larger box, make a small sub using the driver in my Racer 8 post. Cut a hole in the sub box to mount the BT speaker as is. Print a box to hold lithium-ion batteries and a BMS inside too. Find out the charge voltage for the BT speaker and using DC-DC converter modules, set the voltages for that and the amp module
1) Take the back off and using a tubular extension, mess with internal volume increase as well as a passive radiator on the back
2) Don't take the back off, use a tubular extension to create a second back chamber. Fit a lil Tang Band or similar sub in that
3) Remove internals and fit into a larger new enclosure with a better FR driver or 2-way
The internal pre/amp may not be sending lower bass to the stock driver, so measure those speaker leads frequency response. If it is sending low bass and the stock driver just not able to use it, try a passive x-over to send the lower bass to the second driver. Or, pick up the signal from the speaker leads and convert to line level to feed a monoblock sub style TPA3116D2 board that already has a sub filter and bass adjust knobs. The good boards are 2R capable and since you don't seem to mind a larger box, make a small sub using the driver in my Racer 8 post. Cut a hole in the sub box to mount the BT speaker as is. Print a box to hold lithium-ion batteries and a BMS inside too. Find out the charge voltage for the BT speaker and using DC-DC converter modules, set the voltages for that and the amp module
thanks for the ideas!
sounds the most approachable and i feel like there could be indeed some Hz to be gained and maybe at the same time the mid-bass bump reduced
tho, i preferably would like to keep the unit stock (maybe i change my mind once the gurantee is over.. but i also feel like the unit sounds quite good stock) and just make an external shell or something that has some benefits
i actually played around a bit with the speaker (putting it inside of tubes or such) and imo there is some low end extension going on.... also placing the speaker simply on a desk has such a effect (tho its not really predictable/repeatable)
but in my experimentation i actually "sensed" that there was on the outer aluminium(?) tube around 3x as much vibration going on as on the bottom, so i figured why not try a clamp? (as it seems that putting some force with a few fingers around the tube actually quite significantly cleans up some muddyness in the bass/low vocal region)
i will report back once the print finished 🙂
i just took a listen to the clamp, actually this might be the easiest solution to the resonance problem, big pro is it stays portable and i could design it in such way so it can be used as horizontal stand
the clamp definitely reduced/eliminated some of the muddyness, was able to bump the bass by one notch inside the minirig app after that
So, i might just go with this?
currently printing this version (ports are between the clamps) with adjusted/tighter tolerances:
will try to make some measurements soon, im pretty sure this can be seen specially in the waterfal diagram
the clamp definitely reduced/eliminated some of the muddyness, was able to bump the bass by one notch inside the minirig app after that
So, i might just go with this?
currently printing this version (ports are between the clamps) with adjusted/tighter tolerances:
will try to make some measurements soon, im pretty sure this can be seen specially in the waterfal diagram
model can be found here: https://www.printables.com/model/1199327-minirig-4-resonance-clamp-with-horizontal-stand
just an update after a bit more listening to it
i printed the model with Sunlu PLA+ 2.0
its at first a very thight fit but it seems over time the PLA+ gives in a little
while the effect of the clamp on is still audible, its not as good anymore as the first day/few hours
ALSO, i noticed the horizontal stand is actually quite heavly transferring resonances into the ground, therefore i advice to put some rubber feet/dampener under it to avoid aggregating the bottom surface the minirig stands on
----
Also i have to say this, the minirig 4 is actually the first bluetooth speaker that sounds decent coming mainly form studio monitors, while it isnt perfectly flat it has a very nice EQ curve imo (kind of similar i adjust my flat measuring speakers anyway too, slight bass boost and reduced highs)
just make sure you dont go volume-wise much above 3 lights on, as distortion will dominate in these upper volume regions
with 3 lights fully on you end up at around 65-80db depending on the song
(also dont set your android phone to max volume, but around 90% to have some headroom for best SQ ime)
i printed the model with Sunlu PLA+ 2.0
its at first a very thight fit but it seems over time the PLA+ gives in a little
while the effect of the clamp on is still audible, its not as good anymore as the first day/few hours
ALSO, i noticed the horizontal stand is actually quite heavly transferring resonances into the ground, therefore i advice to put some rubber feet/dampener under it to avoid aggregating the bottom surface the minirig stands on
----
Also i have to say this, the minirig 4 is actually the first bluetooth speaker that sounds decent coming mainly form studio monitors, while it isnt perfectly flat it has a very nice EQ curve imo (kind of similar i adjust my flat measuring speakers anyway too, slight bass boost and reduced highs)
just make sure you dont go volume-wise much above 3 lights on, as distortion will dominate in these upper volume regions
with 3 lights fully on you end up at around 65-80db depending on the song
(also dont set your android phone to max volume, but around 90% to have some headroom for best SQ ime)