This listing is for a replacement Promedia 2.1 THX computer speaker AMPLIFIER for a first generation Klipsch 2.1 system.  This plate amplifier mounts to the back of a ProMedia 2.1 subwoofer enclosure (1999-2018). The amplifier works great, has upgraded quality parts, and runs cooler, especially if you select the cooled version that has a Noctua fan mounted. The fan is internal once the amplifier is installed into your enclosure. You reuse your 2.1 subwoofer enclosure. This amplifier has better performance than the ProMedia 2.1 systems produced since 2012.  Compared with the most recent (final?) ProMedia 2.1 THX, this original version with this new LF board has a stronger bass foundation and better presence in the midrange. The newest version sounds hollow. There is a reason the newer versions are less expensive, especially when you account for inflation since this first generation was produced in 2000. Short of using a ProMedia 5.1 system (I have upgrades for them, too), this version of ProMedia 2.1 is the best performing 2.1 desktop speaker system.

November 2025 update:  After 25 years of continuous production, Klipsch has discontinued its ProMedia 2.1 and introduced a "ProMedia Lumina" for $380.  That jump in price would return the ProMedia to an inflation-adjusted price point for its original ProMedia. Has Klipsch hiked its price in order to restore power and quality? Maybe to an extent, but unfortunately, Klipsch's Lumina specs still do not match what the company cited for its first generation's power (98 dB vs. 106 dB) nor frequency range ( minimum 40Hz vs. 32Hz)--see specifications listed below. 8 dB is a lot. Instead, Lumina adds a computer interface, LED adjustable lighting and adjustable-angle satellite stands. The original ProMedia 2.1 system sold for $180 in 2002. Adjusted for inflation, that first generation system would cost $325 in 2025.  The final 2.1 versions (through October 2025) gradually reduced content and power to target a broader market at a lower price point.  At the end of 2023, Klipsch had a ProMedia 2.1 sale for $104, which would have been just $60.93 in 2002, or 1/3 the first generation ProMedia's price that year. 

Klipsch offers three solutions now--none of which equal the first generation:  A) a $99 ProMedia 2.0 (no subwoofer and less powerful) B) the $380 ProMedia Lumina, or C) the $499 R-15PM (Powered Monitors, 50 watts/channel).  Klipsch rates these powered, $499 monitors with 5.25" woofers to perform down to 62Hz ("extending" to 54Hz), while the first generation ProMedia's 6.5" subwoofer reaches 32Hz--nearly one full octave more! The $99 ProMedia 2.0 tasks its 3.5" drivers with handling all low frequencies, resulting in hitting 75Hz at best.  The Lumina surrenders (-6dB) at 40 Hz.  Conclusion: There is nothing on the market that can equal the performance (power, range and clarity) and compact size of a refreshed, first-generation ProMedia 2.1. This holds true not only at what its inflation-adjusted price would be ($325), but also well over that price!

SATELLITE POWER & CLARITY:  So many amplifiers today rely on class D topology, while Klipsch maintained a pure class A/B design through all ProMedia 2.1 generations (1999-2025), even though the rated power declined.  Before you switch to an inexpensive $100 set of off-brand speakers, be sure to listen to them for not only power, but also accuracy.  This listing's first generation version uses a pair of individual power transistors (TIP 41C TIP 42C MOSFETs) for each satellite channel, while the last ProMedia 2.1 uses a single amplifier-on-a-chip to power both channels (TDA7265).  The first generation's rating is 35 watts per channel. (Each transistor in the pair is rated for 65 watts max). The second generation ProMedia (2012 to mid-2018) uses a single TDA7265B chip for both satellite channels, rated for 25 W/channel at 1% distortion, or maximum 30 watts at 10% distortion (which is audible). That switch after the first generation ProMedia 2.1 to a single chip to replace what four discrete MOSFETs produced means pushing power through a noticeably smaller package. The last generation uses a less expensive TDA7265 chip, rated for just 20 watts/channel at 1% total harmonic distortion (THD), or 25 watts maximum at 10% THD.  So each generation has marked a decrease in cost and performance.  You want your amplifier to have plenty of headroom to be able to effortlessly reproduce momentary peaks of demand without distorting or having to compress the sound.  For comparison, Klipsch's 470W ProMedia 5.1 system of the same, early 2000s era uses four MOSFETs per channel, 24 in all, for 60 watts per channel to the satellites. The early, MOSFET-powered ProMedia 2.1, 4.1 and 5.1 all share pleasing clarity.

Upgraded parts: This has a designed-in-2020 (made in 2024/25) low frequency (LF) amplifier board with 57 new components. It produces less heat and has better quality Japanese, U.S., and German capacitors. A pair of 1000uF low ESR capacitors have ten times Klipsch’s original design capacitance, to address a class D design weakness of bus pumping. The original capacitors were next to a hot resistor, so they usually have lost even the original capacitance.  The new design has five improvements: 1) a pair of power resistors waste less energy and produce less heat, 2) are far from the capacitors, 3) the capacitors are much better quality, and two are far larger, 4) the board itself is much better quality, and if selected, 5) a fan keeps heat from cooking components. 

The power supply has eight new components. 

The two satellite circuit boards each has an upgraded resistor to address a design flaw that can cause a channel to short, possibly damaging a speaker. If your ProMedia has one channel dead, 1) check if you can hear both channels through headphones connected to the jack in the side of the preamplifier volume control pod. If sound is present, your signal source is good. Do not connect the good channel's speaker to the dead channel for the next test, or you could burn that speaker out, too! Rather, 2) connect the dead channel's speaker to the channel that works (left or right) to see if it works there. If a speaker tests dead (burned coil), I also have replacement ProMedia 2.1 satellite speakers available.

Optional: a Noctua 150,000 hour internal cooling fan is recommended to even out internal temperatures, speed removal of heat by the aluminum plate and the enclosure, and extend component life in the power supply and LF amplifier. This plate amplifier comes with a 6-month warranty.  The subwoofer is not included. This unit is intended to replace a non-working amplifier. 

Photos show original, charred amplifier boards without cooling and show the new (red or blue) circuit board sitting next to the old, and show the new board after installation.

Caution: Not every problem with the popular ProMedia 2.1 system is due to an amplifier problem. Some systems break from damage to the control pod cable; often noticeable by the system working intermittently as the cable is flexed near its plug, or if you can see one of the pins in the plug is bent over. Others have a failing 6.5" speaker.  You can remove the metal grill, and touch the foam surround. If it is brittle or sticky or even has holes and tears in it, you know it is time to replace it. I can refoam an original 6.5" 6-ohm subwoofer speaker already on hand, or can refoam your speaker ($30 plus shipping). I also have do-it-yourself refoam kits in my store.  Avoid a mismatched 8-ohm or 4-ohm generic replacement. 4-ohm replacements can damage the amplifier. 8-ohm replacements may reduce performance by 25%. Klipsch's 6.5" speakers for systems made since 2018 (Generations 3 & 4) use a lighter magnet for their speaker, and the speaker does not fit in the first generation's enclosure opening.

If you have a second generation (2012-2018) ProMedia 2.1 (not the Bluetooth), it is interchangeable with the original version (which was made from 2000 to 2012).  Both of the versions made until mid 2018 use the same control pod with a round, 6-pin mini-DIN plug, fit the same enclosure, and connect to the same satellite speakers. (A control pod, needed for operation, is not included here).  The newest ProMedia 2.1 systems use a serial-type plug with parallel rows of pins.

This earlier, first generation version uses a heavier, more expensive transformer power supply.  The easiest way to recognize it is by its rocker on/off switch for power, located next to the power cord. This system draws 0 watts when turned off. The original design draws 18-20 watts when turned on (no volume), or 24 VA. With the improved LF board, the amplifier draws 15-16 watts when turned on.  Power factor is .75.  The panels weigh nearly 8 pounds.  A wireless remote used for Christmas lights is an easy way to turn off power wirelessly, or a $10 wired, foot-operated switch for Christmas tree lights is an inexpensive way to turn off power without having to reach down to the back of the subwoofer on the floor each time you use it.

Depending on your zip code, you may find a second or third available shipping option here is less expensive. The amplifier ships double-boxed.

This system includes:
1 Klipsch ProMedia 2.1 amplifier panel 
6-month warranty. 

Avoid throwing out/sending your old ProMedia amplifier into a landfill or paying a recycling fee. I include a Fed Ex Ground return label. Just drop the box off at a Fed Ex Office. You may ship back either an old or newer version amplifier, so it can be refurbished for someone else to enjoy. If you will be shipping back the heavier, first generation version, I recommend re-using my boxes and packaging.  If the buyer prefers, he/she may pay for the core's shipping and will receive a $25 refund from this purchase (plus sales tax can be refunded on the $25, too). Pirate Ship and paypal.com/shiplabel/home offer discounted USPS Ground Advantage prices, so the cost to ship may be under $20 and can net a few dollars more than the cost of the label.

Klipsch's Information 

First Generation (2009 data) 

Total System Frequency Range: 32Hz-20kHZ 

Maximum Acoustic Output: 106dB 

Peak Amplifier Headroom: 2 X 35 watts-satellites 1 X 130 watts-subwoofer 

Satellite Impedance: 4 ohms minimum  

Amplifier: Digital linear hybrid amplifier; discrete MOSFET output power section 

Subwoofer Limiter: Protective limiter function protects the driver and amplifier from extremely high volume playback 


Second Generation Specs (2012 data):

Amplifier: High-efficiency power supply and linear amplifiers designed for uncompressed full power sound

Subwoofer Limiter: Protective limiter function protects the driver and amplifier from extremely high volume playback.

Satellite Impedance: 4 ohms minimum

Third Generation: ProMedia 2.1 BT (Bluetooth) Specs (2017)

Total System Power: 100 watts continuous/200 watts peak at <0.2% THD 

260 watts short-term peak power 

Satellites: 18 watts/channel continuous at <0.2% THD, 1kHz [Note Klipsch only cites at a narrow 1kHz]

           26 watts/channel short-term power at <5% THD, 1kHz 

Subwoofer: 65 watts continuous at <0.2% THD, 50 Hz 

          80 watts short-term power at <5% THD, 50H

 Fourth Generation: ProMedia 2.1 THX (2023) Data not from Klipsch, but based on components used:

Thanks for looking!