ART SLA2 Power Amplifier (2x200 Watts)

Designed with the studio in mind, the ART SLA2 power amplifier packs 400 watts of pristine yet powerful sound.

ART's amplifier stems from the success of their popular 100-watt SLA-1. For all of you power-hungry audio enthusiasts, ART presents to you the more powerful SLA-2. The SLA-2 is a studio linear power amp that delivers 200 watts of clean, clear power, and will help reproduce your mixes with near-pinpoint accuracy inside a single rack space.

One of the top features on the SLA-2 is ART's SmartFan technology. In addition to a standard cooling fan, the over-sized convection heat sinks located on each side of the SLA-2 silently directs heat flow outside the chassis. What makes the SmartFan 'smart'? It's temperature-controlled variable-speed keeps the amp quiet and cool while performing at lower output. SmartFan kicks in only when the amp's heat load rises creating an 'on demand' cooling system in warmer environments.

ART has also included a tamper-proof faceplate for your fixed installations.

Its long list of useful features measure up to an incredible value. The SLA-2 is perfect for pro, project and home studios.


- Toroidal transformer
- 200 watts per channel @ 8 ohms
- 560 watts bridged mono @ 8 ohms
- 10 Hz -- 40 kHz within +/- .5 dB
- XLR, Euroblock & 1/4 in. inputs
- Includes tamper-proof faceplate
- SmartFan silent cooling system
- Low profile 1U rack-mountable
- Extremely low noise, discrete linear design
- All-steel chassis

- Bridged output power, 8 ohms: 560 watts mono
- CMRR: > 60dB (typical @ 1kHz)
- Dimensions: 1.75 in. h x 19 in. w x 13.5 in. d
- Frequency response: 10Hz to 40kHz, +/- .5dB
- Hum and noise: > 100dB below clipping
- Input impedance: 44k ohms (bal), 22k ohms (unbal)
- Input sensitivity: 1V for full power output
- Input connections: XLR, Euroblock (bal), 1/4 in. TRS (bal/unbal)
- Output connections: binding post
- Power requirements: USA 120vac 60 Hz 1000 watts (max) 1000 watts (max)
- Stereo output power, 4 ohms: 280 watts RMS per channel
- Stereo output power, 8 ohms: 200 watts RMS per channel
- Total harmonic distortion: > 0.05% (typical)
- Transformer type: toroidal
- Weight: 19.8 lbs (9 kg)

Output at 8 ohms stereo: 200 watts per channel
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 25.25 lbs
Shipping Dimensions: 23 x 18 x 5 in
Manufacturer Part Number (MPN): SLA2

For support or warranty questions, please contact the manufacturer:
Phone: 716-297-2920

Reviewers gave this product an overall rating of 4 out of 5 stars. (16 ratings)
Submitted April 2, 2009 by a customer from

"200W/Ch of linear power into 8 ohms, in one rack space."

Overall: 4 out of 5 stars
(see rating details)
This review has been selected by our experts as particularly helpful.
This amplifier is a bargain considering its size, power and performance. I do not know of another linear power amp of this rating, in this size, without resorting to the dreaded Class D amps which abound at the moment.

I have been listening it the ART SLA 2 in my Hi-Fi setup now for two days and I am quite impressed by the sound. It is pleasant to listen to if a little brittle in the treble and a bit congested in the mids. The bottom end is nice and dry but perhaps lacks a bit of weight. Their is slight buzz (very low level) that is audible when your ears are against the speakers which is probably due to the power supply filtering being a bit light on (4700uF per rail) and there are no snubbing caps on the bridge rectifier. Very detailed and engaging though.

For installation work there is tamper proof panel that you can screw onto the front. However, I am using it in my live bass rig. The power amp is rated at 200W per channel into 8 ohms but can be bridged to 560W into 8 ohms. It is also a linear (Class B in this case) amplifier and hence does not suffer from the frequency and load dependent phase shifts of Class D amps. The linear power amp combined with the high power and small size 1RU are the reasons I bought it. There is also a small fan which is probably too noisy for a quite studio environment but to me it still seems quieter than a computer fan. You could replace the fan with one read more by PAPST if the noise is a problem in your environment.

Ease of Use
Very easy to use. It features both TRS and XLR inputs as well as a binding strip (which they could lose in my opinion). I would like to have four pole speakon connector

This is a very inexpensive amplifier but I would still say it is pretty well made. The chassis is made of steel and the internal construction is typical of modern manufacturing. It has obviously been built to a price (everything is these days) but that being said their is nothing wrong with the construction. It contains a single sided board but the component choice is good enough and should be reliable in operation. The filtering caps are 105C types and the input opamp is a AN6554 which is a very respectable quad low noise opamp.

Considering the size, power and sound this amplifier is excellent value. I think ART have struck an incredible balance of features versus price.

Manufacturer Support
I hope obtain a service schematic for this amplifier but I haven't tried as yet so I can't make a call on this as yet.

The Wow Factor
It is a pity about the extremely bright BLUE Led that ART have incorportated into the front panel of this amp. On stage it would be shining straight into the audience and annoying everybody. You could reduce the current into the LED by making the series resistor larger as another reviewer suggested but I simply replaced the LED in mine with a 20mcd device from RS components. I think overall the unit looks pretty good but I would lose the large rounded rectangle line that encloses the power and gain controls on the front panel as well. In my opinion this thick white line makes the unit look cheap. Their are no filters on the air inlets on the power amp so if you work in dusty environment the dust will be drawn into the power amp by the cooling fan. All this aside it is still an excellent addition to my current setup.

Musical Background:
Professional Musician, Electronic Design Engineer

Musical Style:
Funk, Soul, Jazz, R&B, Disco House, Rock, Reggae (anything that makes money really)
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