TW AD-2500 - 2 channel Amp 2X500W@8Ω

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  • Regular price $1,599.00

The AD-2500 power amplifier is the end result of many years of experience designing and refining audiophile power amps. Whether you're watching a movie or listening to live concert the AD-2500 amplifier will give you a new level of audio realism with exceptional sounding with our short signal path Class A/B output & efficiency of the Optimized Class “H” Technology.

New AD-2500 power amplifier presents the latest advancements in amplifier technology. The AD-2500 is built to the strict quality and performance standards set by Summit Hi-Fi & ToneWinner. We’re proud to offer you this exceptional audio component that will bring you many years of enjoyment and dependability.


Tone Winner Amplifier AD-2500PA

Audio Specifications:

  • Topology: Fully discrete, dual differential, high current, short signal path Class A/B - Class "H" power supply.
  • Numbers of Channel: 2 Channels - High powered single channel modules.
  • Power Output: ( Rated Power; THD <0.1% @ 115V (Tested @ AC 115V) - (AC 240V Will Increase the output wattage and maintain the THD<0.1%.)
  • 500 watts RMS/channel; 20 Hz – 20 kHz; THD<0.1%; 8 Ohms; one channel driven.
  • 899 watts RMS/channel; 20 Hz – 20 kHz; THD<0.1%; 4 Ohms; one channel driven.
  • 478+ watts RMS/channel; THD<0.1%; 8 Ohms; two channels driven..
  • Power Bandwidth (at rated power; 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.1 dB).
  • Broad-Band Frequency Response: 10 Hz to 59 kHz +0/-2 dB.
  • THD + noise: < 0.0045%; at 100 watts RMS; 1 kHz; 8 Ohms.
  • Signal to Noise Ratio (8 Ohm load):
  • > 110.6 dB; ref FTC rated power; unbalanced input (A-weighted).
  • > 96 dB; ref 1 watt; unbalanced input (A-weighted).
  • Minimum Recommended Load Impedance (per channel): 4 Ohms (which equals one 4 Ohm load or two paralleled 8 Ohm loads).
  • Damping Factor (8 Ohm load): > 121.
  • Input Sensitivity (for rated power; 8 Ohm load): 2.1 V.
  • Gain: 29.81 dB.
  • Maximum Power Consumption: 1700 watts.
  • Power Supply: 110V-240V: 15 Amps - 20 Amps Auto Switching Class "H"Power Supply.
  • Material: Aluminum
  • Modules: Separate Heatsinks for individual modules. 
  • Color: Black
  • Front Panel: Analogue meter with blue LED lights and Red Needle. 
  • Weight: 22.4KGS ( 51.37 Lb)
  • Unit size: 17.48 L X 17.52 W X 7.6 H Inches
  • Package size:22.52 L X 22.52 W X 12.64 H Inches
  • Accessories: Power cord cable.
  • Warranty: 2 years warranty

Customer Reviews

Based on 24 reviews
Donald Fether
Tone Winner AD-2500 @ 1 Month / Very happy! Will be buying another.

Tone Winner AD-2500 @ 1 Month
The amps a keeper. Using the AD-2500 from 3 to 12 hours a day on music styles Rock to Broadway the tone was tasty. I have found for example saxophone reed sounds accurate, the vibrato of the reed very nice, the tone of a trumpet bell ringing real and satisfying. For my system the bass output below 100 Hz is above average although what you hear is dependent on your system. My preamp has a button to reduce 100 Hz levels which I find I need for the turntable preamp and not CD’s (Again system dependent.)
The power supply easily keeps up with long high output requirements of rock guitar bands and that’s driving my 500+ watt per channel Carver towers which can be 4 ohms at times. The amplifier runs cooler than other large amps I’ve owned and that’s a positive. I’ll be buying a second to biamp my speakers and make the amps life easier.
Thank you Aamir for you help and patience

andré bigras
tw ad 2500

I love very mutch my first ad-2500 ,that why I buy other one,now I have 2 .

Beosker Posey
This Unit is NICEE

I'll be honest I bought this unit for the looks. I was pretty sure from the reviews that it would be a good buy. I'm not disappointed in the least, although I'm not sure if the needle is supposed to light up or not. Mine doesn't. No big deal. The really like the build quality. It feels like it's going to last. And while I haven't exactly pushed, it's never warm. Which is great since heat kills. I had wanted to buy the TW AD-5180 but was told that it was discontinued. So Amir helped me get this unit. The one thing that I always hear about summit-hi-fi is the customer service. You can't beat that.

Product as described, refreshingly.

Great amp. Runs cool, which should help it last. Glad I pulled the trigger. Aamir was great at answering any questions I had. Overall great experience from Summit Hifi & ToneWinner. Will definitely be buying more ToneWinner amps from Summit Hifi.

Lil Benny
Two amps are better than one!

I purchased two TW AD-2500 amplifiers with the intention of bi-amp configuration to replace a single two-channel amp. In the meantime, I connected the two amps to my XMC-1 processor, connecting the right channel (XLR cable) to one amp and the left channel (XLR cable) and the center channel (RCA cable) to the other amp. I turned them on and let them run idle for 30 minutes. Then I streamed from Spotify and the amps sounded ok right out of the box. After a few hours of playing them, the sound stage began to open up, instrument placing was coming into focus, and the music became fuller with depth.
Two days later, I began to hear a 60 Hz hum from both amps and traced the problem to the lights over the kitchen sink in the next room. After turning off the lights, I heard a buzz coming from one speaker (Klipsch KLF20). The other speaker (Klipsch KLF20) connected to the other amp was dead quiet. Both amps were on the same circuit. I unplugged the input cables (XLR\RCA) from the amp and could slightly hear the buzz from the speaker. Turning the volume up on the processor did not make the buzzing increase. Once I reconnected the interconnects (XLR\RCA), the buzzing became amplified through the speaker. By the way, to eliminate the speaker as a cause, I did swap speakers and received the same outcome.
Working with Aamir with Summit HI-FI, we tried several solutions to determine the cause of the buzz because it was not occurring with my previous amplifier. We checked ground loops and connections. For this amp, the shipping box was damaged, so there was the possibility this amp was damaged also.
Not being able to determine a cause of the buzz, Aamir was willing to replace the amp. While disconnecting the amp, and connecting the right channel to the other amp, the buzz began in the other amp. This showed that the issue was not with either of the amps. I began to consider cables. I had not before since the issue had not occurred with my previous amp. I changed the one channel with a shielded XLR cable and then the buzz was reduced, which shows I had a ground problem. The efficiency of the speakers and the quality of these amps revealed the issue with the cables and power.
Before I close, I’d like to share some thoughts about the performance of the amplifiers. With my prior amp, the bass was weak, and the highs were way too bright. With these AD2500s, the bass is strong with bottom end and highs and the mid-range are even. These are very accurate amps. With my prior amp, the KLF20s frequency were set at 50 Hz. With then AD2500 amps, the frequency is set at 80 Hz. (I love the current the amps are pushing.) With the AD2500s, I hear more music and better channel separation with no fatigue.
Kudos to Aamir with the time and research in helping to figure out this issue. He went well beyond expectations. Thank you so much. With the level of customer support and quality of product, I don’t know how you will be able to keep up.
Lil Benny