Description
BRZHIFI A1s A1 Series 20W×2 at 8Ω Class-A Amplifier HiFi Power Amp (Silver) for Audiophile Home Use
Description:
With an output power of only 20W at 8 ohms, the A1s amplifier delivers the quintessential British sound: delicate, smooth, warm, and rich in tone, full of character. It is an excellent choice for music lovers. Although the original unit was not very expensive, its sound quality rivals that of many high-end machines from much larger brands.
After extensive listening tests and comparisons, we decided to produce and share this model with everyone. The A1s has had a profound impact on audiophiles. For a long time, it was widely believed that Class-A amplifiers sound best when running hot. The A1s was so successful that its successors—the A2 and then the A3—have never matched its reputation or status.
Features:
20W Class-A Amplifier with Hifi Sound Quality
* Aluminum alloy panel
* Stylish heat dissipation design
* High power output
* Damped tactile knob
* Toroidal transformer
* Exquisite circuit layout
Heat Sink & Laser Marking
* Class-A amplifiers generate significant heat during operation. That's why this unit adopts a symmetrical heat dissipation design on both sides, with tooth-shaped heatsinks for efficient thermal performance.
* The enclosure is made from full aluminum alloy, precisely CNC-machined. The laser-engraved markings ensure they won't rust, fade, or peel — a premium finish typically found on high-end audio equipment.
* 10mm heat dissipation baseplate
* CNC precision machining
* Laser-engraved text
Premium-Grade Components
* Large Toroidal Transformer: The amplifier's powerful performance is driven by a high-quality toroidal transformer — the energy source behind its robust output. Much like a car engine, this oversized, seamless A-core transformer delivers a continuous and stable power supply to the amplifier.
* High-Capacity Main Filter Array: Equipped with Japanese 18000uF 35V capacitors (for Nichicon) — 4 per channel — the total filter capacitance reaches an impressive 144,000uF. This ensures ultra-fast charge/discharge cycles for superior dynamic response and deeper bass extension. Note: These are imported original reclaimed capacitors.
* Original Power Transistors for ON Semiconductor: Each channel uses a pair of MJL21193/MJL21194 transistors for ON Semiconductor — commonly found in ultra-high-end Swiss amplifiers. These transistors deliver exceptional vocal clarity, depth, and detail. Their overall performance exceeds that of counterparts for Sanken, providing a rich, fatigue-free listening experience.
* Original Relays for OMRON: Silver-alloy contact relays prevent power-on/off transients and protect against DC output. With long service life and excellent stability, they safeguard your equipment effectively.
Multiple Full-System Protection Mechanisms
* DC Protection System: It automatically monitors internal circuitry and disconnects the speaker output in case of anomalies, ensuring your speakers are always operating in a safe environment.
* Power-On Delay System: It prevents speaker-damaging power surges at startup and eliminates the "thump" sound typically heard when the amplifier is turned on.
* Overheat Protection System: When the internal temperature exceeds safe limits, the system automatically reduces current and output power to protect the amplifier from thermal damage.
Symmetrical Circuit Design & Dual-Channel Power Output
* The fully symmetrical layout and dual-channel power boards deliver strong and stable output, providing ample driving force and letting you experience the music in its most natural and realistic form.
Intuitive Front Panel Interface
* All functions are clearly labeled for easy and intuitive operation. Compatible with a wide variety of audio devices.
Specifications:
* Model: A1s
* Power Output: 20W (8Ω), 25W (4Ω), Pure Class-A (Equivalent driving force of Class-AB 100W×2)
* Frequency Response: 10Hz–40kHz ±3dB
* Signal-to-Noise Ratio: 105dB
* Impedance: 4–8Ω
* Distortion: Less than 0.001% (1kHz, 1W)
* Voltage: 110V/220V
* Dimensions: 335mm × 208mm × 75mm (L × W × H) (Height excludes feet)
* Weight: 5.3kg
Packing List:
* 1 × Set of Power Amplifier
Packaging Details:
* Weight: 6kg
Description:
With an output power of only 20W at 8 ohms, the A1s amplifier delivers the quintessential British sound: delicate, smooth, warm, and rich in tone, full of character. It is an excellent choice for music lovers. Although the original unit was not very expensive, its sound quality rivals that of many high-end machines from much larger brands.
After extensive listening tests and comparisons, we decided to produce and share this model with everyone. The A1s has had a profound impact on audiophiles. For a long time, it was widely believed that Class-A amplifiers sound best when running hot. The A1s was so successful that its successors—the A2 and then the A3—have never matched its reputation or status.
Features:
20W Class-A Amplifier with Hifi Sound Quality
* Aluminum alloy panel
* Stylish heat dissipation design
* High power output
* Damped tactile knob
* Toroidal transformer
* Exquisite circuit layout
Heat Sink & Laser Marking
* Class-A amplifiers generate significant heat during operation. That's why this unit adopts a symmetrical heat dissipation design on both sides, with tooth-shaped heatsinks for efficient thermal performance.
* The enclosure is made from full aluminum alloy, precisely CNC-machined. The laser-engraved markings ensure they won't rust, fade, or peel — a premium finish typically found on high-end audio equipment.
* 10mm heat dissipation baseplate
* CNC precision machining
* Laser-engraved text
Premium-Grade Components
* Large Toroidal Transformer: The amplifier's powerful performance is driven by a high-quality toroidal transformer — the energy source behind its robust output. Much like a car engine, this oversized, seamless A-core transformer delivers a continuous and stable power supply to the amplifier.
* High-Capacity Main Filter Array: Equipped with Japanese 18000uF 35V capacitors (for Nichicon) — 4 per channel — the total filter capacitance reaches an impressive 144,000uF. This ensures ultra-fast charge/discharge cycles for superior dynamic response and deeper bass extension. Note: These are imported original reclaimed capacitors.
* Original Power Transistors for ON Semiconductor: Each channel uses a pair of MJL21193/MJL21194 transistors for ON Semiconductor — commonly found in ultra-high-end Swiss amplifiers. These transistors deliver exceptional vocal clarity, depth, and detail. Their overall performance exceeds that of counterparts for Sanken, providing a rich, fatigue-free listening experience.
* Original Relays for OMRON: Silver-alloy contact relays prevent power-on/off transients and protect against DC output. With long service life and excellent stability, they safeguard your equipment effectively.
Multiple Full-System Protection Mechanisms
* DC Protection System: It automatically monitors internal circuitry and disconnects the speaker output in case of anomalies, ensuring your speakers are always operating in a safe environment.
* Power-On Delay System: It prevents speaker-damaging power surges at startup and eliminates the "thump" sound typically heard when the amplifier is turned on.
* Overheat Protection System: When the internal temperature exceeds safe limits, the system automatically reduces current and output power to protect the amplifier from thermal damage.
Symmetrical Circuit Design & Dual-Channel Power Output
* The fully symmetrical layout and dual-channel power boards deliver strong and stable output, providing ample driving force and letting you experience the music in its most natural and realistic form.
Intuitive Front Panel Interface
* All functions are clearly labeled for easy and intuitive operation. Compatible with a wide variety of audio devices.
Specifications:
* Model: A1s
* Power Output: 20W (8Ω), 25W (4Ω), Pure Class-A (Equivalent driving force of Class-AB 100W×2)
* Frequency Response: 10Hz–40kHz ±3dB
* Signal-to-Noise Ratio: 105dB
* Impedance: 4–8Ω
* Distortion: Less than 0.001% (1kHz, 1W)
* Voltage: 110V/220V
* Dimensions: 335mm × 208mm × 75mm (L × W × H) (Height excludes feet)
* Weight: 5.3kg
Packing List:
* 1 × Set of Power Amplifier
Packaging Details:
* Weight: 6kg
Payment Terms
1. We accept PayPal,Payoneer,Visa Card,Google pay,Credit card etc.
2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
2. We ship to your eBay or Paypal address. Please make sure your eBay and Paypal address is correct before you pay.
Shipping Terms
1. We will process the order within the handling time ,if you have any questions, please contact us via eBay message or email.
2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding.
2. For remote regions of DHL/FedEx..., extra shipping costs might be charged. Usually it costs about 30USD-50USD. We will contact you if shipping company informed us your address belongs to remote area. Thanks for your understanding.
Return Terms
If you receive the item that not satisfied or defective, please do not open case and kindly notify us within 30 days. We will guide you the returning process for replacement or refund.
Custom Duties & Taxes
1. It is buyer's responsibility to cover the import duties, taxes.We do not charge any taxes and fees, and the possible taxes and fees will be collected by the platform or by third parties such as customs and carriers.
2. Please check with your country's customs office and inform us what/how much should declare before shipping.
2. Please check with your country's customs office and inform us what/how much should declare before shipping.
Feedback
1. Please kindly leave us a positive feedback and 5 star DSR if you satisfied with our product and service. Please feel free to contact us firstly if you have any problem with your order, we are responsible and credible seller and will solve the issue it for you asap.
2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.
2. If you are dissatisfied for any reason, please don't be quick to leave us neutral or negative feedback. We work hard to make sure EVERY CUSTOMER 100% SATISFIED and resolve any problem for you and always leave positive feedback to all our customers.