A-318B

About the A-318B

The Almarro A318B is a Class A single-ended triode integrated amplifier made in Japan, featuring 6C33C-B output tubes and 6SL7/6SN7 driver tubes. It delivers approximately 18 watts per channel into 8 ohms with a frequency response from 10 Hz to 30 kHz, offering a warm, rich sound characteristic of SET designs with surprising bass authority and dynamic punch. The amplifier uses point-to-point wiring and quality components for reliability and ease of maintenance. It includes three RCA line-level inputs, speaker output taps for 4 and 8 ohms, and manual bias adjustment for the output tubes. The amplifier weighs 18 kg and measures 370 x 280 x 200 mm. It features a relay-controlled timer for tube warm-up and stabilization, with a power consumption of 240 watts. The design incorporates larger output transformers than its predecessor (A318A) for improved bass control and power delivery, and a modest global feedback of about 5.4 dB to extend frequency response. The A318B is noted for its excellent midrange texture, dynamic tracking, and ability to drive a wide range of speakers, making it suitable for listeners seeking emotional connection with music rather than ultimate technical precision. It is a rare, hand-crafted amplifier with a solid wood finish and robust construction.