The 330A is a stereo power amplifier by MOON that delivers 125 watts x 2 channels into 8 ohms, 250 watts x 2 channels into 4 ohms, and 400 watts bridged into 8 ohms mono. The first 5 watts are Class A. It was released in 2018. It is a 2-channel design using a Class A/B output stage. Bridged to mono it delivers 400 watts mono into 8 ohms, which is the usual way to use a pair of these on a demanding speaker. Speakers connect via binding posts. A minimum impedance of 4 ohms makes it compatible with a wide range of loudspeakers. The MOON 330A has an MSRP of $4,400.
Performance Specs
One of the most important factors when deciding on an integrated amplifier is its power ratings and compatibility with your speaker's impedance requirements. The MOON 330A is rated at 125 watts RMS into 8-ohms. MOON provides this wattage at a THD (Total Harmonic Distortion) of 0.05% which is an important indicator of distortion at the given values (lower THD is better).
Here are the main highlights of its performance specs:
- 125 watts into 8-ohms (10 Hz-125 kHz) at 0.05%
- 250 watts into 4-ohms
- 4-ohms Min Impedance (allows compatibility with a wide range of loudspeakers)
- 100dB Signal to Noise Ratio
How loud will 125 watts actually play in your room? →
Wiring more than one pair of speakers to it? Check the load first →
Which speakers suit the MOON 330A?
125 W into 8 ohms, 250 W into 4, rated down to 4 ohms.
We rank every passive speaker we cover against it on power, impedance safety and current
delivery.
Need more power?
MOON 330A is rated at 125 watts into 8 ohms, which puts it in our 121 to 180 watts band. The next band up is Over 180 watts, which is worth about 2.3dB more output. That is a real difference in headroom on peaks, and a modest one in how loud the system plays - power and loudness are not the same thing.
Before buying watts, check what your speakers actually need: the amp and speaker matcher works it out from their sensitivity, impedance and your room. Plenty of systems are better served by the 91 to 120 watts band and better speakers.
When pairing the MOON 330A with a passive Bookshelf (Stand mount) or Passive Floor Standing (Tower) speaker, you have to check if their Max Power Range is below the max wattage of the amp for the given impedance levels.
Operating your amp outside of this max range may damage the speakers.
What size of room is the MOON 330A Amplifier good for?
An essential deciding factor is the size of the room in which you intend to employ the MOON 330A amplifier. Here, taking into account its maximum power parameters, we analyzed its applicability to various size environments:
| Listening Environment |
Suitability |
| Near-field | Poor |
| Small Room | Poor |
| Mid-size Room | Good |
| Large Room | Good |
| Very Large Room | Average |
Inputs and Outputs
Besides the performance specs of the MOON 330A, the next important feature set that you have to evaluate is the input and output selections that it offers.
MOON 330A has total of 2 Analog inputs .
Inputs
- Total Number of Analog Inputs: 2
Outputs
Bluetooth Connectivity
MOON 330A doesn't have bluetooth connectivity feature. In order to stream your music via bluetooth, the easiest way is to connect an external bluetooth receiver to your MOON 330A. Two bluetooth receivers that we recommend are the
iFi Zen Blue V2 and the
Audioengine B1.
Among the amps in the same price range, these are the 5 amps that have Bluetooth Connectivity:
Phono Input
MOON 330A doesn't have a phono input so in order to play your vinyl albums, MOON 330A has to be paired with a Phono Preamp that is MM (Moving Magnet) or/and MC (Moving COil) depending on your cartridge type.
Balanced connections
MOON 330A has a balanced XLR input. A balanced cable carries the signal twice, on two conductors of opposite polarity. Interference picked up along the way lands on both equally and cancels when the two are recombined at the far end, so the longer the cable run and the noisier the surroundings, the more the connection is worth. Whether a balanced connection also yields more power depends on how the amplifier is built inside - some are balanced end to end, others convert to single-ended internally and deliver the same power either way, so it is worth reading the maker's own wording rather than assuming.
MOON 330A Pros and Cons
Drawn from the published figures on this page, not from listening.
- ✓Power nearly doubles into a harder load, 125 watts into 8 ohms rising to 250 into 4, which points to a power supply with real current in reserve.
- ✓Signal-to-noise ratio of 100dB, so the amplifier itself should be inaudible between tracks.
- ✓Can be bridged to mono, so a pair can be used as two larger monoblocks.
- ✓Balanced XLR inputs, worth having on a long cable run.
- ✗A power amplifier has no volume control and no input selection - it needs a preamplifier, or a source with a variable output, in front of it.
MOON 330A External Dimensions and Weight
MOON 330A has external dimensions of (H x W x D) 3-1/2 x 16-7/8 x 14 inch (88.9 x 429.3 x 355.6 mm ).
Base Surface Area
Base surface area of an integrated amplifier may become an important decision factor when the space in your room or desk is limited.
The base area of the MOON 330A is approximately 1526.6cm2 / 236.6inch2.
- Width: 429.3mm (16-7/8")
- Height: 88.9mm (3-1/2")
- Depth: 355.6mm (14")
- Weight: —
- Base Surface Area: ~1526.6cm2 / 236.6inch2
- Volume: ~13.6 liter / 3.6 gallon
Available colors
MOON 330A is available in Black and Silver color options.
| General |
| Brand |
MOON |
| Full Model Name |
MOON 330A |
| Release Date |
2018 |
| Amplifier Type |
Power Amplifier |
| Number of Channels |
2 |
| Amp Class |
Class A/B |
| Amplifier Technology |
Solid State |
| Performance |
| Watts RMS per Channel into 8-ohms |
125 watts |
| Watts RMS per Channel into 6-ohms |
N/A |
| Watts RMS per Channel into 4-ohms |
250 watts |
| Bridged Power per Channel |
Yes, 400 watts mono into 8 ohms |
| Frequency Bandwidth |
10 Hz-125 kHz |
| THD |
0.05% |
| Minimum Impedance |
4 |
| Signal to Noise Ratio |
100 dB |
| Digital Music |
| Built-in DAC |
No |
| Bluetooth |
No |
| WiFi |
No |
| CONNECTIONS |
| Total Analog Inputs |
2 |
| Phono Input |
No |
| Headphone Output |
No |
| Removable Power Cord |
|
| Speaker Connectors |
Binding posts |
| PHYSICAL SPECS |
| Height |
88.9mm (3-1/2") |
| Width |
429.3mm (16-7/8") |
| Depth |
355.6mm (14") |
| Weight |
— |
| Available Colors |
Black,Silver |
| OTHER |
| Parts Warranty |
|
| Labor Warranty |
|
How much power does the MOON 330A have?
The MOON 330A delivers 125 watts x 2 channels into 8 ohms, 250 watts x 2 channels into 4 ohms, and 400 watts bridged into 8 ohms mono. The first 5 watts are Class A. Its output almost doubles into 4 ohms, which points to a strong power supply that can hold its composure with demanding, low-impedance speakers.
Does the MOON 330A use vacuum tubes?
No. The MOON 330A is a solid-state amplifier - there are no vacuum tubes in it.
What amplifier class is the MOON 330A?
The MOON 330A uses a Class A/B amplifier design. Class A/B is the traditional linear design: it runs warmer and is less efficient than Class D, but it is long valued for its natural, low-distortion sound.
Does the MOON 330A have a built-in DAC?
No. The MOON 330A has no built-in DAC, so a digital source such as a streamer or CD transport needs its own converter, or you connect it over analogue.
Can I connect a turntable to the MOON 330A?
No. The MOON 330A has no phono input, so a turntable needs an external phono preamp (or a deck with one built in) before it can be connected.
Does the MOON 330A have Bluetooth?
No. The MOON 330A does not have Bluetooth built in; you would need an external Bluetooth receiver connected to one of its inputs.
Does the MOON 330A have a headphone output?
No. The MOON 330A does not have a headphone output, so headphone listening needs a separate headphone amplifier.
How much does the MOON 330A cost?
The MOON 330A has a manufacturer's list price (MSRP) of $4,400.
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