Music Reference RM-245

(Click to enlarge) The RM-245 is a 45 Amplifier, capable of delivering 5 Watts per side. Perfect for a small to medium listening room, the RM-245 is a very effective amplifier with unparalleled sonics in it's price range. This amp has received very good reviews in Audiophile Voice magazine. At Music Reference we are sometimes astounded at the waste and inefficiency of many current audiophile products. Whether a watt wasting, tube burning, distortion ridden, single ended design or a heat billowing silicon monstrosity, the concept and practice of waste and faddishness are anathema to our design practices. That’s why we were willing to devote four years of intensive research and development to the RM-245. It is our response to the failed efforts of others to produce an amplifier that at once sets standards of low cost, solid power output and wonderful musicality. In a world where 2 watts from a 45 was considered the limit, designer Roger A. Modjeski has endowed the RM-245 with 5 watts from the very same pair of tubes. More good news is found in the eco-friendly nature of the RM-245 which uses only 1/10th of a Watt of precious electricity at idle. This convergence of economy and efficiency is further evidenced by output tube life that exceeds 10,000 hours. The RM-245 is a product for the music lover who appreciated the subtlety of music as well as its grandeur. Its 5 watts per channel will drive many of today’s loudspeakers to realistic levels in all but the largest rooms. We invite you to celebrate the RM-245; to view its subtle lines and glowing charm, as well as to wade in its simple, truthful way with music. Let it be your partner in the appreciation of music and the combined art and science of amplifier design. In an era where mediocrity and waste are common, we offer you an experience of utmost quality and enduring value. Please feel free to contact us for more information about the RM-245.

RM-245 and 245.1 Specifications

Power Output: 5 Watts RMS per channel. Distortion: Less than 9% from 50 Hz to 20 KHz at 4 watts, 5 watts with EML 45. THD is typically less than 3% at 4 Watts dependent on feedback setting. Hum: Less than 150 microvolts (0.25 millivolts) of hum¹ (see below) Noise and Hiss: Typical 40 to 80 microvolts² (see below) Frequency Response: -3 dB at 8 Hz and 50 KHz. Inputs: Gold plated Tiffany® RCA Input impedance = 100 K ohms.

Power Bandwidth: -3 dB from 29 Hz to 40 KHz. Outputs: 8 ohm with 1/2" solid brass hex head posts. Damping Factor: 2 to 10 depending on feedback control setting Sensitivity: 200 mv to 1 V depending on feedback control setting Tube Complement: 2 45; 2 6GH8 Each unit is hand wired with point-to-point wiring Price: 245 $6,000 245.1 $2,250

1 Most audio amplifier do not even spec their hum, and those that do are not even close to this figure.
2 Noise and hiss is dependent on the 6GH8 driver tube. For very low noise (40 microvolts or less), you can use our Super Low Noise (SLN) tubes.