Description
A1
The return of a true Hi-Fi classic – the A1 Integrated Amplifier.
The A1 has one secret. This secret is simple: it makes music. It sounds sweet and fluid and creates a beautiful atmosphere around natural instruments. Especially in small to mid-sized rooms, carefully set up with a pair of great two-way speakers. It is not a powerhouse, but music lovers will cherish its abilities.
It‘s also not a product that you‘ll want to hide. A perfect example of form follows function. The oversized heatsinks define the A1‘s look, but they are essential for its operation. Truly unique, from the outside and inside.
The A1 has a sweet, warm, full and exciting sound. No harshness. No grain. Just pure music. It doesn‘t get muddy, and despite its lower power, drives difficult speakers with ease. It remains clean right up to its power limit. To hear what the A1 does is to hear what Hi-Fi is supposed to do: it makes music, pure and simple.
Phono Stage
The A1 employs a discrete current-mode input stage for lowest noise amplification of MC and MM cartridges. A low noise current to voltage conversion stage is used for further amplification and RIAA equalization. Automatic input impedance matching for the selected MC input, along with increased gain increases the versatility of the A1‘s phono stage.
Power Supply
The new A1 has received an updated transformer from shared (1985 original) to more efficient “dual mono split rail” windings. The amp stages are supplied by fully independent left and right power supplies for better power handling and stereo imaging and each power amplifier now has double supply capacity resulting in reduced ripple and noise.
The transformer‘s noise and heat dissipation are reduced due to better efficiency and updated components. The main supplies are filtered for better regulation and reduced switch on surge.
Class A
The A1 Integrated Amplifier is built around a completely discrete and symmetrical Class A topology. It is able to output 25 Watts of pure Class A power @ 8 ohms load, with 25 Amps of maximum output.
While the numbers here might seem rather low, the ability for the output stage to drive difficult speakers is a small miracle in itself. The amp design being dynamic class A, and if Class A standing current is exceeded, it will automatically allow more. It therefore slides (not switches) smoothly into class B style operation, temporarily allowing the further current draw needed.
Features
- 25-watts of pure Class-A operation.
- Able to drive even the most demanding of loudspeakers.
- Updated transformer using dual-mono split rail windings.
- Premium ALPS RK series motorised volume control.
- Remote control included.
Specifications
- Amplifier
- Power: 25 Watts per-channel into 8 Ohms
- Voltage: 42.5 Volts peak-to-peak
- Current: 25 Amps peak-to-peak
- Damping Factor: 150
- Gain (volume max): 32 dB (Direct Mode), 42 dB (Normal Mode)
- Output Devices: 2 per-channel
- SNR: 82 dB
- Channel Separation: 85 dB
- Frequency Response: + 0, –1 dB, 10 Hz – 40 kHz
- Line Level Sensitivity: 300 mV rms nominal, 8 V rms max
- Line Level Inputs Impedance: 25 kOhms
- Tape Out Impedance: 220 Ohms
- Pre Out Impedance: 100 Ohms
- Phono Stage
- Phono RIAA response: ±1 dB
- MM Sensitivity: 5 mV nominal
- MM Capacitance / Impedance / Gain: 100 pF / 50 kOhms / 40 dB
- MM SNR: 75 dB
- MC Sensitivity: 450 μV nominal
- MC Impedance / Gain: 1 kOhm / 60 dB
- MC SNR: 70 dB
- Inputs
- 1 x Phono RCA (MM / MC)
- 5 x Line RCA
- Outputs
- 1 x Line Level RCA (fixed TAPE OUT)
- 1 x Line Level RCA (variable PRE OUT)
- 1 x 4 mm banana / binding posts SPEAKER OUT
- General
- Dimensions (W x H x D): 440 x 68.3 x 283.3 mm
- Main Voltages: 230 V / 115 V Internally set, or 100 V optional
- Max. Consumption: 130 W, 0 W in standby (Power Switch OFF)
- Weight: 10.5 kg
Included
- 1 x A1 Integrated Amplifier.
- 1 x Mains Power Cable.
- 1 x Remote Control.
- 1 x Documentation.
Full Musical Fidelity Range Available
Unilet Sound & Vision are official retail partners for Musical Fidelity, providing sales, advice and assistance on their entire range of high-quality products. Please do get in touch if you would like a demonstration or wish to purchase.
