Description
V Hi-Fi je Musical Fidelity The A1 has become one of the most classic designs – inside and out. First released in 1985, it quickly became a hit, being an absolute beast when it came to driving some of the heaviest speakers of the time, even though it was actually a fairly low-power integrated amplifier.
Stereo amplifier Musical Fidelity A1 is a classic for real HiFi gourmet with a touch of nostalgia
Pri Musical Fidelity they say: “For the first time since its initial release, 2023 has actually retained all the specs, looks and circuitry of the 1985 version for those who missed it the first time around.
With an updated transformer, power supplies, and modern low-noise components, we have revitalized the formula and are proud to once again pred"We are putting on a fresh original – three decades later."
Technical debate
Stereo amplifier Musical Fidelity The A1 is built around a fully discrete and symmetric topology of theredand A. It can transmit 25 W of pure power.reda A into an 8 ohm load with 25 A of peak power. While the numbers may seem quite low, the output stage's ability to drive demanding speakers is a minor miracle in itself. The amplifier's design is a dynamic rangered And if the constant current isreda A exceeded, it will automatically allow more. Therefore it smoothly “slips” (NOT “switches”) into the operating mode of thereda B, which temporarily allows for higher current consumption.
Power supply part
The new A1 has an updated transformer and more efficient “dual mono split rail” windings. The amplifier stages are powered by fully independent left and right power supplies for improved power handling and stereo imaging, and each power amplifier now has double the power supply capacity, resulting in reduced ripple and noise.
Predamplifier part
Circuit predThe low-noise amplifier is identical to the original 1988 design and, as we pointed out above, benefits greatly from improved, fully smooth and regulated power supplies.
Among the notable changes, the one that immediately catches the eye is the addition of a new “direct” switch at the p stage.redamplifier. With this switch you can completely bypass the amplifier block pred nadvolume level, resulting in approximately 10 dB less gain. This feature proves particularly beneficial when working with modern or high-performance digital sources, as it allows you to fine-tune the range of your volume potentiometer and adapt to sensitive speakers.
In addition, a noticeable nadbuilding the volume potentiometer itself, which is now nadThe ALPS RK series potentiometer has been replaced. This high-quality component provides superior performance and improved accuracy. In addition, the potentiometer is now motorized, allowing you the convenience of adjusting the volume from the comfort of your couch, thanks to the new included remote control.
A1 over time (1985-2023) - Improvements to the original
- Updated transformer for more efficient “dual mono split rail” windings.
- High quality and updated potentiometer
- Added IR remote control for volume
- Reinforcement block pred nadVolume control fully passable using a “direct” switch (-10dB)
- All transistors, including output devices, are carefully selected
- All capacitors in the signal path are polypropylene (PP).
- The resistors are modern low noise metal foils
- Care and attention are taken to ensure that no component specifications are changed, but are updated to a modern equivalent with a long lifespan
- The circuit layout faithfully follows the original
- Circuit sections are better laid out, especially separate power supplies and power amplifiers
- Phono stage and predThe amplifier is improved with less noise and hum
Return of the real one Hi-Fi classical
Stereo amplifier Musical Fidelity A1 has a secret.
This secret is simple: it creates music. It sounds sweet and flowing and creates a wonderful atmosphere around natural musical instruments. Especially in small to medium sized rooms.redlarge rooms with well-chosen "bookshelf” speakers. It’s not a powerhouse, but music lovers will appreciate its capabilities.
It's also not a product you'd want to hide. A perfect example of form following function. Oversized refrigerators opredThey lack the look of the A1, but are essential to its operation. Truly unique, inside and out.
The A1 has a sweet, warm, full and exciting sound. No harshness. No crackling. Just pure music. It doesn't get dirty and despite its lower power, it drives demanding speakers with ease. It stays clean right up to its power limit. Hearing what the A1 does is hearing what it's supposed to do. Hi-Fi What he did: he made music, pure and simple.
Excellent Phono stage
The A1 uses a discrete current mode input stage for the lowest noise amplification of MC and MM cartridges. A low noise current to voltage conversion stage is used for nadFurther amplification and RIAA equalization. Automatic input impedance matching for the selected MC input together with increased gain increases the versatility of the A1 phono stage.
Musical Fidelity A1 - technical specifications
Amplifier
- Power: 25 watts per channel at 8 ohms
- Voltage: 42,5 V peak to peak
- Current: 25 amps peak to peak
- Damping factor: 150
- Gain (maximum volume): 32 dB (unlimited)redno mode), 42 dB (normal mode)
- Output devices: 2 per channel
- Signal to noise ratio: 82dB
- Channel separation: 85dB
- Frequency response: +0, –1dB, 10Hz to 40kHz
- Line level sensitivity: 300 mV rms nominal, 8 V rms max
- Line level input impedance: 25k Ohms
- Output impedance: 220 Ohms
- Impedance predoutput: 100 Ohms
Predsound amplifier
- Phono RIAA response: +/- 1dB
- MM sensitivity: 5mV nominal
- MM capacitance/impedance/gain: 100pF/50k Ohms/40dB
- MM signal to noise ratio: 75dB
- MC sensitivity: 450μV nominal
- MC impedance / gain: 1k Ohm / 60dB
- MC signal to noise ratio: 70dB
Entrances
- 1x phono RCA MM/MC, 5x line RCA
Exits
- 1 x line RCA fix TAPE OUT
- 1 x line level RCA var PRE OUT
- 1 x 4 mm banana/connector posts SPEAKER OUT
General information
- Dimensions (WxHxD): 440 x 68,3 x 283,3 mm
- Mains voltage: 230V/115V internally set or 100V selectable
- Max. Consumption: 130 W, 0 W in standby mode (=switch off)
- Weight: 10,5 kg
DO YOU WANT ADVICE • DO YOU HAVE A QUESTION?
AV PLANET audio video specialists
e-mail: info@av-planet.si
phone: 051 436 500
url: www.av-planet.si
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Need more information? Visit the official manufacturer's website Musical Fidelity
