Ubernoob
2nd July 2019, 08:47 PM
Hi all,
Thought I might move this one away from my toys thread.
My boss bought a Milwaukee portable speaker and while it wasn't bad(for a $60 speaker) on axis it the upper mids were gone as soon as you were a few degrees off axis. I figured I'd make a basic bluetooth speaker with decent off axis response, I have used Dayton drivers in the past and have liked them so I went with them again.
Parts list-
Tweeters- Dayton AMT Mini-8
Midrange- Dayton ND65-8
Bluetooth Receiver- Lusya CSR8675 Wireless Lossless Bluetooth 5.0 Audio Stereo Receiver(from AliExpress)
Amplifiers- Two TPA3116 two-channel 50W + 50W amps(again AliExpress), speakers will be bi amped with passive crossovers.
Crossovers 12dB oct- Dayton inductors and Jaycar caps, two resistors in a series parallel config to knock 7dB off the tweeters' output, there will be a 6dB high pass at 20Hz for the mids-Nichicon Muse caps from memory.
Box- Poorly made ply and fibreglass enclosure, volume is around 1.1L after speaker displacement and port volume is deducted, the left is actually about 50mL less than the right as the amplifiers will use some real estate so I'll put a bit more dacron in that side.
I am no cabinet maker so my work is a bit rough but it will all work okay and will be used on job sites and moved with greasy hands.
457319
457320
457321
457322
457323
457324
457325
Parts are sadly at least a couple of weeks away, the back will have a speaker cloth cover and the ports will go in to some timber extensions so it should look a tad better.
EDIT- In the crossover pic the resistors are in the wrong orientation and a couple of jumper wires are yet to be added.
Thought I might move this one away from my toys thread.
My boss bought a Milwaukee portable speaker and while it wasn't bad(for a $60 speaker) on axis it the upper mids were gone as soon as you were a few degrees off axis. I figured I'd make a basic bluetooth speaker with decent off axis response, I have used Dayton drivers in the past and have liked them so I went with them again.
Parts list-
Tweeters- Dayton AMT Mini-8
Midrange- Dayton ND65-8
Bluetooth Receiver- Lusya CSR8675 Wireless Lossless Bluetooth 5.0 Audio Stereo Receiver(from AliExpress)
Amplifiers- Two TPA3116 two-channel 50W + 50W amps(again AliExpress), speakers will be bi amped with passive crossovers.
Crossovers 12dB oct- Dayton inductors and Jaycar caps, two resistors in a series parallel config to knock 7dB off the tweeters' output, there will be a 6dB high pass at 20Hz for the mids-Nichicon Muse caps from memory.
Box- Poorly made ply and fibreglass enclosure, volume is around 1.1L after speaker displacement and port volume is deducted, the left is actually about 50mL less than the right as the amplifiers will use some real estate so I'll put a bit more dacron in that side.
I am no cabinet maker so my work is a bit rough but it will all work okay and will be used on job sites and moved with greasy hands.
457319
457320
457321
457322
457323
457324
457325
Parts are sadly at least a couple of weeks away, the back will have a speaker cloth cover and the ports will go in to some timber extensions so it should look a tad better.
EDIT- In the crossover pic the resistors are in the wrong orientation and a couple of jumper wires are yet to be added.