TEAC AP-505 Power Amplifier

TEAC AP-505 Power Amplifier is a compact, versatile stereo design driven by TEAC's high performance Hypex Ncore power amplification technology which can also operate in bi-amp or BTL (Bridge Tied Load) mode.

Enclosed in an elegant housing featuring a small footprint, AP-505 delivers 2 channels of 115 watts of power in stereo/bi-amp modes and 220 Watts in BTL mode. The Ncore power amplifier module ensures superior sound quality.

The steel chassis is covered by lightweight aluminum-alloy. Twin large level-meters add aesthetic appeal while proprietary ‘Pin-point’ feet are strategically located in three positions on the underside to help create a more detailed and balanced stereo image.

Hypex Ncore

AP-505 employs a high-performance, energy-efficient Hypex Ncore power amplifier module delivering 115W + 115W in stereo/bi-amp modes or 220W in BTL mode.

The module has undergone extensive listening tests before being carefully tuned and tweaked by engineers, easily drives a wide range of speakers, delivering anything from a pianissimo to a fortissimo, and everything in between. In other words, it properly reproduces the dynamics of real music.

Small Footprint

Every external panel is formed from high-grade aluminium alloy, firmly fixed to the sturdy steel inner chassis. This helps lower the transmission of mechanical vibration, ensuring every single element within is allowed to perform at its best.

Thanks to its convenient A4-sized footprint, AP-505 suits rooms where space-efficiency is crucial i.e. desktop. This contrasts typical bi-amp/BTL power amps which are usually bulky, full-width units.

Fully Balanced Design

By employing a fully-balanced circuit design from the input section to the output stage, the AP-505 keeps the audio signal as unadulterated as possible as it moves through the amplifier, the result being extremely low distortion levels and an excellent signal-to-noise ratio (assisted by the effective elimination of common-mode noise).

Designed for HiFi

Sound quality is fundamentally defined at input and high-quality MUSES8820E dual op-amps are employed for both XLR and RCA inputs. In the power supply, both the left and right channel rectifying circuits are totally isolated from the power transformer onwards.

Four high-capacity 4700μF capacitors are featured on each channel (8 in total) for clear separation in the soundstage between channels. A well-designed circuit delivers excellent signal integrity at the XLR input section thanks to the reduction of coupling capacitors that can often lose audio data as a signal travels through them.

Toroidal Transformer

In the power supply, the AP-505 employs a high capacity toroidal-core transformer, with Schottky barrier diodes in the rectifying circuit. Unlike conventional diodes, Schottky barrier diodes reduce rectifier noise, leading to a ‘cleaner’ supply and a more stable delivery of current.

Easy Installation

AP-505 employs TEAC's ‘Pin-Point’ feet. These comprise two separated metal sections in an integrated housing. One has a spiked top and is attached to the bottom of the chassis, the other is a basin-shaped base that hangs down from the spiked section, with a flange-shaped cup to simplify installation.

Due to the unique design, vibrations and resonance are minimised because the unit is supported on just three points with a very small surface contact area. This arrangement reduces mid and low frequency muddiness so improving the soundstage and enhancing fine sonic detail.

Passive-Cooling Design

This amplifier is designed to prevent distracting operating noise from a cooling fan. TEAC engineers sought to use a circuit and layout that enabled sufficient natural cooling to create a compact but powerful amplifier which didn’t need the help of a cooling fan.

Analogue Level Meters

Analog level meters on the front panel move in response to signal levels visually confirming the amplifier's performance. A four-step dimmer (bright, mid, dim off) lets users adjust the display intensity to taste, while a switchable sensitivity allows you to enjoy more, less or even zero meter movement.

Key Features

- Hypex Ncore power amplifier module, tuned by TEAC
- 115W + 115W of max output power or 220W in BTL mode
- 3 switchable output modes: Stereo, Bi-Amp and BTL
- Fully balanced circuit design, from input to output
- Huge toroidal transformer and Schottky barrier diodes
- Comprehensive protection circuitry
- ‘Pin-point’ feet for easy installation
- Large level meters
- XLR Balanced and RCA Unbalanced analog audio inputs