Plinius SA103 Power Amplifier


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The Plinius SA-103 Class A power amplifier is the successor to the acclaimed SA-100 power amplifier and features include dual power transformers with much higher capacity, improved power supply filtering, circuit refinements, and advanced energy saving and error detecting logic control. Input configuration switching allows the SA-102 to be run as a fully balanced mono power amplifier. Two SA-103s operated in this fashion provide 460 watts per channel of pure balanced Class A music. Constructed in a substantial chassis with huge Plinius designed heatsink extrusions forming the sides of the case. Enhanced cooling flow built in to the amplifier allows it to run cooler while still maintaining the substantial bias current required for Class A operation. The power supply is housed in the base of the unit and is separated from the active signal circuitry by a horizontal internal bulkhead. Although rated at 125 watts per channel in stereo mode, the SA-103 has a very large current capacity. Difficult loads are driven with ease, although very low efficiency ones in large spaces may need the added power of the Plinius SA-Reference. Input options allow for Stereo via RCA connectors, bridged mono through RCA connectors, XLR stereo via XLR balanced connectors, or XLR balanced mono. Signal carrying wires are all Siltech brand. Available in Black or Silver.

Power     125 Watts RMS 20Hz to 20kHz into 8 Ohms both channels driven from 20Hz to 20kHz.
Bridged/Balanced Mono Output     460 Watts RMS per channel into 8 Ohms.
Frequency Response     20Hz to 20kHz at 0.2dB. -3dB at 5Hz and -3db at 70kHz.
Distortion     Typically less than 0.05% THD at rated power, 0.1% THD and IMD worst case prior to clipping.
Hum & Noise     100dB below rated output 20Hz to 20KHz A-weighted.
Input Sensitivity     0.8V RMS for rated output at 1kHz.
Input Impedance     47k Ohms
Dimensions (mm)     220H x 500W x 455D
Weight (kg)     38

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Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A
Saturday by 12 Delivery £35 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25