ST-10M
US$ 1,795.00
Reference class power amplifier
The ST-10M Reference Class Mono Amplifier builds upon NuPrime’s fourth generation (V4) amplifier module from the ST-10 and brings it to the next level. The ST-10 was designed within the space limitation of its chassis and hence had a power system which was capable of providing 150W power output to each of the stereo channels. To really bring out the best of the V4 amplifier module, the ST-10M has a new 300W power supply for its mono channel. The entire design including the chassis has been optimized for the mono configuration, further lowering the cross channel interference.
Out of stock
Other Circuit Enhancements
The original 10A bridge rectifier has been replaced by a 50A Schottky diode, the capacitors upgraded 30,000 micro-Farad, and duly the power transformer is now rated at 300W. Improved circuit layout with careful component selection has allowed the ST-10M to have a lower noise floor than the ST-10.
The NuPrime Sound
The ST-10M sounds more full bodied and rich, conveys greater immediacy and power as compared to the ST-10. The improved power delivery and reduced interference gives the instruments richer overtones and more natural decay. The soundstage is deeper and creates a greater sense of space. Imaging gains more solidity over the ST-10 which already has an impressive placement.
The effects of the improvements could be heard on the following examples. The striking of piano keys demonstrates greater attack and faster transients, with a sound that naturally resonates with the piano body. Brass instruments sounds glorious, characterful and carries a natural sheen but not overly bright. Female vocals and high frequencies retains the signature of the ST-10 but is smoother on the ST-10M. In an ensemble, the tonality gains an extra notch of richness which makes the overall presentation more natural.
With the ST-10M, every aspect of the ST-10 sound has been improved upon, which makes it truly a reference grade amplifier!
Note: The ETI BP-20C binding posts used in current production have higher quality than the ETI Cable Pod binding posts used in older production batches.
- Inputs:
- RCA: Un-Balanced input x 1
- XLR: Balanced input x 1
- Outputs:
- Speaker Out x 1
- Power Output (rated): 230W @ 8 Ohms, 320W @ 4 Ohms
- Power Output (peak): 270W @ 8 Ohms, 375W @ 4 Ohms
- Gain: x 28
- Input Impedance: 47k Ohms
- Sensitivity: 1.5Vrms to rated power
- Total Harmonic Distortion (THD): 0.01%
- Signal to Noise Ratio (SNR): 91dB @ 10W
- Frequency Response: 0Hz to 50kHz (-3dB)
- Rated / Peak Current: 10A / 18A
- Standby Power Consumption: 0.9W at 115V outlet, 1.7W at 230V outlet
- Idle Power Consumption: 14W at 115V outlet, 14.8W at 230V outlet
- Worldwide AC voltage: (115 VAC / 230 VAC) with Voltage Select Switch
- AC Fuse: Slow-blow, 5A, 250VAC
- Dimension: 59 mm H x 215.4 mm W x 394 mm D
- Weight: 6 kg
- Color: Black or Silver
ST-10M is a phase inverting amp. If you are certain that the +/- (usually the red/white connectors) phase of your inputs are non inverting, then you should reverse the +/- inputs for each channel on ST-10M. All other NuPrime amps were designed as non-inverting amp. If you have no idea what this is all about, don’t bother with making any adjustment.
There is no 12V trigger for ST-10M.
NuPrime DAC-10, ST-10 and Totem Rainmaker speakers
– By RafaPolit, audiocircle.com
“…
For the first time I understand what “sound stage” means. Sound comes from everywhere, not just from the speakers. Each voice and instrument has its own position, really an eye opener for me!
It is a powerful combo, so much so that if you a not careful, you can blow out your speakers.
…
The clarity of the sound is remarkable if the source has that quality…”
NuPrime ST-10M with Magnepan 1.7i
-By Jan A., audiocircle.com
“…ST10M is a reference level amplifier, just like advertised, in performance at least equal in many respects to the equipment that is multiple of their price level, which is saying something about NuPrime engineering abilities….”
ST-10M with Legacy Helix
– By Brad from Canada
“…They sounded pretty impressive right out of the box, but have improved greatly over the last 3 weeks. It would be a huge understatement to say that I’m very impressed with their performance. The following are my observations on sound quality in no particular order: Large holographic soundstage, 3D imaging, completely black background, very neutral and highly resolving, tight defined bass, superb mid-range (vocals are awesome), rich tone, smooth and dynamic. Excellent performance from top to bottom, very musical and engaging (toe tapping goodness!) I’ve been in this hobby for approx. 30 years, and at no time have I come across the price / performance value that NuPrime offers, it really is unbelievable. These amps are the real deal, and I will be keeping them…”
Review of ST-10 in AudioCircle
– ZAPHOD2012, audiocircle.com
“…I have Audience 2+2 in a stereo system in the bedroom, they have been powered by Cary Audio and Parasound multi channels. Due to the weight and only stereo need i sold the Cary and Parasound for the Nuprime ST-10. I was cautious as i have hated my previous experiments with class d amps such as rotel, pioneer and wyred4sound, all cold and lifeless, boring and flat. The ST-10 was a revelation, sweet, very detailed, tight, extended and bouncy, it had life and was a joyful match with the 2+2’s, I cannot remember a more enjoyable sound in 30 years, especially for the money, and the mids are incredible…
…In my main system i needed to replace my hernia weighted Cary 7 channel, so with my positive experience with the ST-10 I plumped for the MCH-K38 at half the weight of the Cary and hoping it would come close to the exceptional ST-10. The MCH-K38 will be used in a 5.1 system driving Audience 4+4’s when they arrive from the factory. In 5.1 mode the first 4 channels will be bridged and that is how i compared it to the ST-10, not only did it equal the ST-10 but in bridged mode bettered it. Same family signature but just with a more effortless control, more open, less restrained and detailed, I am extremely surprised and very happy, what a combination made in heaven, the Audience and the Nuprime ….rock on ….”
NuPrime DAC-10H DAC/Pre and ST-10 Power Amplifier
– Steven Stone, theabsolutesound.com
DAC-10H
“……Within their product categories the DAC-10H DAC/preamp and ST-10 basic power amplifier are priced at the lower mid-level, yet they both deliver a level of performance that could be considered exemplary regardless of their cost. The DAC-10H has the capabilities, sound, and feature set that should keep it current for a number of years, while the ST-10 produces a level of sound quality that unless you absolutely must have more power output capabilities, will make “upgrading” to anything but a far pricier and more powerful amplifier more of a sideways proposition than an upward one…
…As it is a relatively new firm, NuPrime has yet to develop the reputation and visibility of more venerable audio companies. But given the quality of its first three products, the IDA-16, DAC-10H, and ST-10, it’s hard not to predict that NuPrime will be a force to be reckoned with now and in the future…”
ST-10
“…over the years I’ve reviewed and used plenty of digital power amplifiers from Bel Canto, Wyred4Sound, April Music, and others, and I appreciate what a well-designed model can bring to a system. And it happens that the ST-10 is the best digital power amplifier I’ve heard to date…
…Within their product categories the DAC-10H DAC/preamp and ST-10 basic power amplifier are priced at the lower mid-level, yet they both deliver a level of performance that could be considered exemplary regardless of their cost… “
→AudioCircle.com ST-10 discussion
Amp & Preamp (3)
In some applications, the speaker outputs from the power amplifier are used as source signals for devices such as REL sub woofer. For such application, usually the receiving devices should have DC offset blocking capability because some amplifier by design has floating ground (DC offset) on the speaker outputs.
The following models have no DC offset on the amplifier speaker outputs and the negative terminal is also the ground:
NuPrime STA-9, MCH-K38, IDA-6, IDA-16, STA-9X, AMG STA
The following models’ speaker outputs can not be connected directly to sub woofer input:
NuPrime Reference 20, ST-10, IDA-8, ST-10M, Evolution One, Evolution Two, Evolution STA, AMG One, MCX-1,2,3,4
REL has provided instructions for connecting Class-D amp with floating speaker outputs to their sub woofers, please contact REL. All currently shipping REL sub woofers can be connected directly to any Nuprime amps.
IDA-8 is an extremely popular and award winning integrated amp. New users are welcome to read this long topic on audiocircle.com: http://www.audiocircle.com/index.php?topic=134697.0
When a device has a 12V trigger input, it is designed to be turned on when a 12V is detected. You can use any standard male to male 3.5mm (3-pin type) cable.
https://components101.com/connectors/35mm-audio-jack
The Tip section is +12V, the bottom Sleeve section is GND, and the middle Ring section is not used. Nuprime’s trigger design uses 3.5mm stereo cable pin 1 and pin 3. A mono trigger cable shorts pin 2 and pin 3, it can be used to connect the Nuprime device to another device’s trigger that only uses a mono cable.
