D
Deleted member 148505
TPA3245+BTM875 based 2.1 portable amp
Some pictures of my current work in progress.
A three channel Bluetooth AMP with AUX in and Qualcomm TWS.
Amplifiers used are 2xTPA3245 (heatsink still missing), one in BTL and one in PBTL mode.
Both amps get their signal differntially, amped via TS914. The BTL amp is getting its signal directly from the BTM875 DAC, the PBTL one has a PCM5101 DAC as source.
I use the DSP of the CSR8675 for crossover etc. Works a treat.
As power supply I am using 4S LiPo packs, charged via LTC4006, limited to 2A charging rate. All voltages required for the amps, preamps and BTM875 are managed on a separate board.
The TPA3245 can either run with VBAT or 30V from a LM5122 single phase boost converter.
The switch from VBAT to 30V is based on the audio input levels of the amps. Moderate room volume will keep the amps playing with VBAT, turning up will automatically enable 30V supply.
Still, a lot of work (and documentation) to be done, but I am quite happy with the results so far.
Both PSU and Amps
PSU
Amp
Some pictures of my current work in progress.
A three channel Bluetooth AMP with AUX in and Qualcomm TWS.
Amplifiers used are 2xTPA3245 (heatsink still missing), one in BTL and one in PBTL mode.
Both amps get their signal differntially, amped via TS914. The BTL amp is getting its signal directly from the BTM875 DAC, the PBTL one has a PCM5101 DAC as source.
I use the DSP of the CSR8675 for crossover etc. Works a treat.
As power supply I am using 4S LiPo packs, charged via LTC4006, limited to 2A charging rate. All voltages required for the amps, preamps and BTM875 are managed on a separate board.
The TPA3245 can either run with VBAT or 30V from a LM5122 single phase boost converter.
The switch from VBAT to 30V is based on the audio input levels of the amps. Moderate room volume will keep the amps playing with VBAT, turning up will automatically enable 30V supply.
Still, a lot of work (and documentation) to be done, but I am quite happy with the results so far.
Both PSU and Amps
PSU
Amp
D
Deleted member 148505
Looks like my silver case is slightly bigger, I bought it here at 80USD shipping included.
I updated wirings to color coded. Momentary reset button installed on the back.
Chassis feet not yet arrived.
Attachments
Last edited by a moderator:
SYLPH-D200 TPA3255
I finished my first class d amplifier project.
Board: SYLPH-D200 TPA3255
PSU: Connex SMPS600RS 48V
Input Switch: Eizz
Stepped Attenuator: Eizz
Chassis: Modushop Galaxy
I finished my first class d amplifier project.
Board: SYLPH-D200 TPA3255
PSU: Connex SMPS600RS 48V
Input Switch: Eizz
Stepped Attenuator: Eizz
Chassis: Modushop Galaxy
Attachments
5 channel HYPEX NC250MP
Goal was to build a cool 5 channel amp for my Exasound E28 DAC.
5 x Hypex NC250MP in a self made case.
The drawing:
View attachment 966465
The prototype:
The eval board:
View attachment 966468
In the case:
View attachment 966470
Result is nearly perfect - crisp sound, zero noise, perfect fit.
Meanwhile I added a softstart.
Goal was to build a cool 5 channel amp for my Exasound E28 DAC.
5 x Hypex NC250MP in a self made case.
The drawing:
View attachment 966465
The prototype:
The eval board:
View attachment 966468
In the case:
View attachment 966470
Result is nearly perfect - crisp sound, zero noise, perfect fit.
Meanwhile I added a softstart.
Subwoofer plate
Hi!
Here a 2x15 "subwoofer plate, used in a sound reinforcement system, small PAs at events, etc.
Based on a 2x500 w / 4 Ohms bridged Pascal S-Pro2 module.
It packs a punch, hitting 1400 peak watts in the settings I use.
Used for many hours at 100% in dance sessions, it hardly heats up, a little more for the SMPS part.
As a preamplifier I use a low pass filter, cut off at 120Hz, and a small circuit with an NE5532 to invert the phase of channel II.
Regards!
Hi!
Here a 2x15 "subwoofer plate, used in a sound reinforcement system, small PAs at events, etc.
Based on a 2x500 w / 4 Ohms bridged Pascal S-Pro2 module.
It packs a punch, hitting 1400 peak watts in the settings I use.
Used for many hours at 100% in dance sessions, it hardly heats up, a little more for the SMPS part.
As a preamplifier I use a low pass filter, cut off at 120Hz, and a small circuit with an NE5532 to invert the phase of channel II.
Regards!
Attachments
Hi amigos,
My last Hypex NC502MP 2x350W / 8R fully balanced
Full alu case
Audio grade Filter
Push banana plugs
faire une galerie d image html
My last Hypex NC502MP 2x350W / 8R fully balanced
Full alu case
Audio grade Filter
Push banana plugs
faire une galerie d image html
