DIY bluetooth speaker build - Visaton, TDA7492P 2x20W

parts:
amplifer:TDA7492P
http://www.banggood.com/TDA7492P-Bluetooth-CSR4_0-Audio-Receiver-Digital-Amplifier-Board-p-1067571.html?p=7Y22143351272201512O
battery:NCR18650B
http://www.banggood.com/4PCS-NCR18650B-3_7V-3400mAh-Protected-Rechargeable-Lithium-Battery-p-90989.html?p=7Y22143351272201512O
battery holder:
http://www.banggood.com/Wholesale-Plastic-Battery-Storage-Case-Box-Holder-For-4-x-18650-Battery-p-36859.html?p=7Y22143351272201512O
http://www.banggood.com/Male-Female-12V-DC-Power-Plug-Jack-Adapter-Connector-for-CCTV-p-952843.html?p=7Y22143351272201512O
charger:
http://www.banggood.com/4pcs-4_2V-18650-3800mAh-Li-ion-Rechargeable-Battery-18650-Universal-Charger-p-1127612.html?p=7Y22143351272201512O
speakers: Visaton F8 SC/ F8SC
alternative speakers:
http://s.click.aliexpress.com/e/YzjUjYZ
Passive speakers: https://pl.aliexpress.com/item/2pcs-2-2-inches-Bass-Passive-Radiator-Auxiliary-Bass-Function/32684348173.html?spm=2114.010208.3.240.8wdZNe&ws_ab_test=searchweb0_0,searchweb201602_1_10000073_10065_10068_10000077_10000074_10000132_10000033_10000030_119_10000167_10000026_10000175_10000126_10000129_10000023_10000123_432_10000069_10000068_10060_10062_10056_10055_10000062_10054_10000063_301_10059_10000120_10099_10000020_10000156_10000158_10000013_10000117_10103_10102_10000016_10000114_10096_10000111_10000056_10000059_10052_10053_10050_10107_10051_10106_10000097_10000094_10000090_10000147_10000091_10000144_10084_10000150_10000101_10083_10000100_10000011_10080_10000153_10000104_10082_10000045_10081_10110_10000108_10111_10000191_10112_10113_10000197_10114_10000089_10000086_10000179_10000083_10000042_10000135_10000080_10078_10079_10000039_10073_10000140_10070_10000036_10122_10123_10121_10126_10124_10000187,searchweb201603_1,afswitch_1,ppcSwitch_2,single_sort_3_default&btsid=50cbca93-f62b-4dcc-9858-c33d2df13b35&algo_expid=24aaf01a-abc8-4c1e-a587-444d522c1abd-27&algo_pvid=24aaf01a-abc8-4c1e-a587-444d522c1abd
http://s.click.aliexpress.com/e/Iq3f6Uz
wood: plywood 6mm

music:

1.Silence Await by cdk (c) copyright 2008 Licensed under a Creative Commons Attribution (3.0) license. http://dig.ccmixter.org/files/cdk/17432 Ft: oldDog
2.Instrumental by Josh Woodward
3.maxzwell stay
4.maxzwell hurt

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