I'm a bit confused. If I want to attach my tabletop to subwoofers and speaker, what else do you recommend. Receiver and amplifier?
Tabletop? Turntable? What one do you have?
For using subs modern avrs have bass management, old 2ch gear generally does not. Some subs have some bass management built in, most do not and only provide a low pass filter. A receiver and an amplifier is possible but probably not necessary as the amp built into the receiver will generally be fine.
A receiver is, in one box: tuner, pre-amp, amp
An integrated amp is, in one box, a pre-amp and amp
Separates would be each unit in their own box, tuner, pre-amp, amp....
Most of the older 2ch gear will have an appropriate phono stage (i.e. phono pre-amp and RIAA eq) for a turntable, there will be two types of cartridges they can handle....magnetic or moving coil. The most common built in phono stages will accommodate a magnetic type. Some prefer a separate box for their phono stage. Some newer turntables come with their own phono stage (many modern receivers do not provide a phono stage built in).