The Electro-whatever website makes many errors. The datasheet shows the important missing parts.
The voltage gain is very high at almost 400 times (!) so output hiss noise will probably be audible. Negative feedback resistors can be added to reduce the gain at the risk of oscillation.
With 220uF output capacitors feeding 4 ohm speakers then 182Hz (upper bass) will be at half power and lower frequencies will be reduced a lot more. Bass boost does not boost the low frequencies, instead it reduces mid and high frequencies.
A solderless breadboard guarantees that the circuit will oscillate at a high frequency. Use a pcb instead.