1. Amplification: A turntable's built-in amplifier is typically much weaker than that of a receiver, so you won't get as much volume.
2. Impedance matching: The impedance of your speakers must match the impedance of the turntable's amplifier. If the impedance is not matched, the sound quality can be distorted.
3. Tone control: A receiver allows you to adjust the bass and treble of your music, which can help you get the best possible sound quality.
4. Multiple inputs and outputs: A receiver has multiple inputs, so you can connect multiple devices, such as a CD player, tape deck, or MP3 player. It also has multiple outputs, so you can connect multiple pairs of speakers or use a subwoofer.
5. Radio: Many receivers also include a radio tuner, so you can listen to your favorite radio stations.
If you're on a budget, you can get a basic receiver for a relatively low price. However, if you want the best possible sound quality and flexibility, it's worth investing in a higher-quality receiver.