Hello everyone!
This is my first thread here, so let's get straight to the point! I'm building a portable bluetooth amp + speaker for a individual science project and i've been roaming for a few days on the internet but I still have some questions i can't solve on my configuration.
I chose for the amp the TDA-7492P with the following specs:
TDA7492P:
Power supply: 12V 3A (recommend) ; [9-20V]
Amplifier IC: TDA7492P-Stmielectronics
Sound Source: DCM8633 Bluetooth 4.0 module
Output mode: Stereo
Output power: 25W + 25W; THD=10% ; Vcc=18V; RL = 6ohms
Adaptive speaker: 20W/4ohms, 20W/6ohms, 20W/8ohms
and I have currently 2 speakers "full-range":
Visaton FRS8 -4 (from datasheet):
Impedance: 4 ohms
Rated Power: 30W
Maximum Power: 50W
Frequency Response: 100 - 20 000 Hz
Here are the dimensions of my prototype enclosure, after calculating online from the FRS8 datasheet:
28*10,5*17 cm or (11*4*6,5 in)
Questions:
1) First, do you see anything weird in the choice of my components or does it seems ok for you? (can my amp drive my speakers correctly?)
2) In the first place, i was considering getting a FRS-8 and this 6 ohm tweeter but in the end, it costs more than the 2 drivers i already got.
Is it really bothering in terms of sound if I mount the 2 full range speakers (one on each channel) and no tweeter? What would you recommend?
3) If yes, what components and values should i look for a passive crossover?
4) I'm looking for a way to make a Li-ion battery to power my amp. Here's what i'm thinking of, any critic?
4x 3000mAh 3,7V Li-Ion (in serie)
5) What charging protection module should I buy?
Looking forward to read you all, thanks a lot!
Thomas
P.S: any useful contribution will be listed in the "special thanks" in my final report
This is my first thread here, so let's get straight to the point! I'm building a portable bluetooth amp + speaker for a individual science project and i've been roaming for a few days on the internet but I still have some questions i can't solve on my configuration.
I chose for the amp the TDA-7492P with the following specs:
TDA7492P:
Power supply: 12V 3A (recommend) ; [9-20V]
Amplifier IC: TDA7492P-Stmielectronics
Sound Source: DCM8633 Bluetooth 4.0 module
Output mode: Stereo
Output power: 25W + 25W; THD=10% ; Vcc=18V; RL = 6ohms
Adaptive speaker: 20W/4ohms, 20W/6ohms, 20W/8ohms
and I have currently 2 speakers "full-range":
Visaton FRS8 -4 (from datasheet):
Impedance: 4 ohms
Rated Power: 30W
Maximum Power: 50W
Frequency Response: 100 - 20 000 Hz
Here are the dimensions of my prototype enclosure, after calculating online from the FRS8 datasheet:
28*10,5*17 cm or (11*4*6,5 in)
Questions:
1) First, do you see anything weird in the choice of my components or does it seems ok for you? (can my amp drive my speakers correctly?)
2) In the first place, i was considering getting a FRS-8 and this 6 ohm tweeter but in the end, it costs more than the 2 drivers i already got.
Is it really bothering in terms of sound if I mount the 2 full range speakers (one on each channel) and no tweeter? What would you recommend?
3) If yes, what components and values should i look for a passive crossover?
4) I'm looking for a way to make a Li-ion battery to power my amp. Here's what i'm thinking of, any critic?
4x 3000mAh 3,7V Li-Ion (in serie)
5) What charging protection module should I buy?
Looking forward to read you all, thanks a lot!
Thomas
P.S: any useful contribution will be listed in the "special thanks" in my final report