Understanding the Difference Between Preamps, Amps, and Why You Still Need Both
If you’re building your first vinyl setup, it’s easy to get confused about what each component does. Many beginners ask the same question:
“If I already have a phono preamp, do I still need an amplifier?”
The short answer is yes — in most setups, you still need an amplifier.
A phono preamp and an amplifier do completely different jobs, and one cannot replace the other.
Let’s break it down in simple terms.
1. What a Phono Preamp Actually Does
A phono preamp (also called a phono stage) has two key jobs:
✓ Boosts the weak phono signal
A turntable’s cartridge output is extremely low (2–6 mV). A preamp boosts it to line level, which is usable by an amplifier.
✓ Applies RIAA equalization
Vinyl records are pressed with reduced bass and boosted treble.
A preamp restores the correct frequency balance.
But: the preamp’s output is still not powerful enough to drive speakers.
2. What an Amplifier Does
An amplifier (or integrated amp) takes the line-level signal and makes it strong enough to power speakers.
Without an amplifier:
- The sound will be extremely quiet
- Speakers won’t move properly
- Bass and clarity will be weak or nonexistent
A phono preamp alone cannot drive passive speakers.
3. The Only Time You Don’t Need a Separate Amplifier
You don’t need an external amplifier if you’re using:
✅ Powered (active) speakers
These have a built-in amplifier.
Your signal chain will look like this:
Turntable → Phono Preamp → Powered Speakers
If your turntable already has a built-in preamp, the chain becomes even simpler:
Turntable (LINE OUT) → Powered Speakers
No external amp needed.
4. When You Do Need an Amplifier
You must use an amplifier if you are using:
❌ Passive bookshelf or floor-standing speakers
❌ Vintage speakers
❌ Studio monitors without line-level compatibility
Your signal chain should look like this:
Turntable → Phono Preamp → Amplifier → Passive Speakers
Many modern receivers, integrated amps, and stereo amplifiers include a built-in preamp, but if yours doesn’t, you need both components.
5. Quick Comparison
| Component | Purpose | Can it power speakers? |
|---|---|---|
| Phono Preamp | Boosts turntable signal & applies RIAA EQ | ❌ No |
| Amplifier | Drives speakers | ✅ Yes |
| Receiver / Integrated Amp | Amp + (sometimes) preamp in one unit | Depends on model |
| Powered Speakers | Have internal amplifier | Preamp still required |
Final Answer: Do You Still Need an Amplifier?
Yes — unless you are using powered speakers.
A phono preamp fixes your turntable’s signal, but it does not provide the power needed to run speakers.
To get full, rich, room-filling sound, an amplifier is almost always essential.