TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black | Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

Brand: Definitive Technology, TEAC
Model Number: 314140
Model Number: 314140
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TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black | Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

This Bundle Includes:
(1) TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black
(1) Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

Special Order – Items may ship separately – Call to Inquire

Product Description

Features & Specifications



TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black | Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

This Bundle Includes:
(1) TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black
(1) Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

TEAC AP505B Reference 500 Series Stereo Power Amplifier – Black

A stereo power amplifier that is incredibly small and uses Hypex Ncore technology to enable bi-amping or BTL (Bridge Tied Load/Bridged) mode A high-performance, TEAC-tuned Hypex Ncore power amplifier module contained inside a small, stylish housing, serves as the foundation of the adaptable stereo power amplifier known as the AP505B.

The AP505B may operate in stereo, bi-amp, and BTL (Bridge Tied Load/Bridged) modes, in addition to traditional stereo operation. In stereo and bi-amp modes, the AP-505 can output a maximum of 130W + 130W and 250W, respectively. Its core is a Ncore power amplifier module developed by Dutch company Hypex that has been expertly tweaked for outstanding sound quality by TEAC’s R&D team.

A sturdy steel chassis is covered by lightweight aluminum-alloy panels on the outside. When the amplifier is in use, two huge level metres offer visual interest, and three strategically placed “Pin-point” feet on the underside of the amplifier lend incision to the sound, assisting in the creation of a more stable and detailed stereo image.

NCore Audio Power Conversion

The Hypex Ncore power amplifier module used in the AP505B is high-performance and energy-efficient, producing 250W in BTL mode or 130W + 130W in stereo/bi-amp modes. The module, which has been meticulously calibrated and tweaked by our engineers after undergoing rigorous listening tests, readily drives a variety of speakers, giving anything from a pianissimo to a fortissimo and everything in between. Therefore, it accurately mimics the dynamics of real music.

Stereo, Bi-amp, And BTL Modes Are Supported

By placing a few AP505B units side by side, this little unit offers multiple speaker driving modes, Bi-amp, and BTL modes in addition to the traditional stereo mode with 130W + 130W of output power. While the BTL modes create 250W of output power in each channel, the Bi-amp mode drives the woofer and tweeter separately.

Stiffness, Stability And Elegance Provided By A Full-Metal, Small-Footprint Body

Every exterior panel, including those on the front, top, and sides is made of a sturdy steel core chassis and a high-grade aluminium alloy. This technique of construction ensures that every component inside the unit is able to operate at its peak performance by reducing the transmission of mechanical vibration. Because of its practical A4-sized footprint, the AP505B fits in seamlessly in contemporary settings where saving space is crucial, like a desktop. Contrast this with the majority of traditional bi-amp/BTL-capable power amplifiers, which are typically hefty, full-width equipment.

Full-Scale Balance

The AP505B maintains the audio signal as pure as possible as it passes through the amplifier by using a fully balanced circuit design from the input section to the output stage. This leads to extremely low distortion levels and a fantastic signal-to-noise ratio (assisted by the effective elimination of common-mode noise).

Components That Have Been Carefully Chosen And Are Only Used In Hi-Fi Applications

High-quality MUSES8820E dual op-amps are used at the input stage, where sound quality is essentially determined, for both the XLR and RCA inputs. The left and right channel rectifying circuits use four high-capacity 4700F capacitors on each channel (8 in total) in the power supply part of the input stage to achieve distinct soundstage separation between the left and right channels.
A well-designed circuit provides great signal integrity at the XLR input portion, in part due to the removal of coupling capacitors, which frequently cause audio information to be lost as a signal passes through them.

Large Toroidal Power Transformer

The AP505B’s power supply uses a large capacity toroidal-core transformer while the rectifying circuit uses Schottky barrier diodes. Schottky barrier diodes, as opposed to conventional diodes, lessen rectifier noise, resulting in a “cleaner” supply and a more steady delivery of current.

Easy Installation Thanks To ‘Pin-Point’ Feet

The AP505B uses the “Pin-Point” feet that TEAC is attempting to patent. These consist of two independent metal pieces enclosed in a single housing. One is attached to the chassis’s bottom and has a spiked top, while the other has a basin-shaped base with a flange-shaped cup that hangs down from the spiked area. The ‘Pin-Point’ feet have a special design that significantly reduces vibrations and resonance because the unit is held by just three points and has a very limited surface contact area. This arrangement improves the soundstage and enhances fine auditory clarity by reducing mid- and low-frequency muddiness.

Design Using Passive Cooling For Silent Operation

Designing an amplifier that produces a pair of speakers with outstanding sound but also produces a cooling fan that is always making noise is absurd. Our engineers were adamant from the beginning to adopt a circuit and layout that would permit adequate natural cooling, enabling the design of a small but powerful amplifier that didn’t require a cooling fan.

Dual Analogue Level Meters Indicate The Musical Tempo

The AP505B front panel’s analogue level metres move in reaction to signal levels, providing an aesthetically pleasing indication that the amplifier is functioning as intended. Users may alter the display’s intensity in four steps (bright, mid, dim off), and a switchable sensitivity (0dB, +20dB, movement off) lets them choose whether they’d like to see more, less, or even no metre movement.
Naturally, you can determine the device is on even if the lighting is out and the metre movement has been disabled by looking at the location of the power switch!


  • TEAC-tuned Hypex Ncore power amplifier module
  • Maximum output power of 130W plus 130W, or 250W in BTL/bridged mode.
  • Able to function in stereo, bi-amp, and bridged/BTL modes
  • Complete circuit balancing
  • Carefully chosen premium components created specifically for hi-fi applications
  • Large-scale Schottky barrier diodes and toroidal power transformers
  • Circuits for comprehensive protection (Surge, Over-voltage, Thermal)
  • Pin-point feet for simple installation that are still subject to patent (Japan Patent Nos. 4075477, 3778108)
  • Substantial level metres
  • Use of passive cooling to achieve silence
  • Full-metal body with an A4-sized footprint for rigidity, stability, and elegance
  • Analogue audio inputs with XLR balanced and RCA unbalanced connections (one set of each)
  • Screw-type speaker connectors with a wide pitch
  • Automatic power saving
  • RoHS compliant

Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair

The Demand 11 offers full-range, room-filling sound and precise imaging. These are the true audiophile’s bookshelf loudspeaker of choice.

Superior Midrange and Tight Bass

Balanced Double Surround System and Integrated Passive Bass Radiator.

Precise Imaging

Linear Response Waveguide.™

High-Frequency High-Performance

Laterally Offset Tweeter Assembly.

Everything in Its Proper Place

Featuring unique technologies such as the Balanced Double Surround System™, the Demand 11 uses a linear response waveguide, and laterally offset tweeter assembly, the D11 Large Bookshelf Speakers deliver remarkably smooth, detailed top-shelf audio for true audiophiles.

Aluminum Dome Tweeter for clear, precise highs

The Demand 11 couples a laterally offset 1” Aluminum Dome Tweeter with our 20/20 Wave Alignment Lens™. We offset the tweeters by 5°, minimizing wave cancellations off the front baffle to deliver a more precise center stereo image and ensure clear, detailed high-frequency performance.

Exclusive BDSS™ midrange/woofer

The Demand 11’s 6.5” patented Balanced Double Surround System™ (BDSS) woofer provides greater excursion and output for superior midrange detail and punchier bass compared with other drivers of similar size.

Integrated Bass Radiator for superior low-end extension

Produces superior low-end extension with an integrated 6” x 10” passive bass radiator. Plus, the addition of a larger spider to the radiator reduces rocking and delivers cleaner, tighter bass response.

Audiophile-Quality Crossovers for beautifully balanced audio

The Demand 11 crossovers are built with the latest premium audiophile-quality parts, including polypropylene metal-film capacitors and air-core inductors. These high-end components meticulously manage frequencies for clean and crystalline treble, refined and articulate midrange, and linear, low-distortion bass. This ensures that every detail comes through within a clear, balanced presentation that never sacrifices power.

Linear Response Waveguide™ all natural, totally precise

The patented Linear Response Waveguide™ extends both on-axis and off-axis frequency dispersion for more natural midrange timbre and precise imaging.

Flawless Home Theater Audio

True audiophiles are obsessive about all sound, not just their music. The Demand 11 is designed with meticulous attention to detail, it also flawlessly reproduces home theater audio.

Artistry to the eye and ear

Extruded aluminum front baffles capture a clean, modern aesthetic with a bead-blasted finish for a timeless look and feel to fit any décor. Each speaker is meticulously sanded and painted with five layers of premium gloss paint, then buffed to a near-mirror finish.

Brand TEAC   Model TEAC 314140
Product: TEAC AP505B Reference 500 Series Stereo Power Amplifier - Black | Definitive Technology Demand 11 6.5″ Bookshelf Speaker – Black – Pair
Amplifier - DAC



Amplifier section

Stereo, Bi-amp modes: 130W + 130W (4Ω, 1kHz, JEITA) 90W + 90W (8Ω, 1kHz, JEITA)
BTL (Bridge) mode: 250W (8Ω, 1kHz, JEITA)
Stereo, Bi-amp modes: 115W + 115W (4Ω, 1kHz, THD 0.8%) 70W + 70W (8Ω, 1kHz, THD 0.8%)
BTL (Bridge) mode: 220W (8Ω, 1kHz, THD 0.8%)
Total harmonic distortion: 0.0015% (8Ω, 1kHz, 12.5W, JEITA)
Signal-to-Noise ratio: 113dB (8Ω, 1kHz, IHF-A)
Frequency response: 10Hz to 50,000Hz (+0dB, –5dB, 8Ω, 1W, JEITA)
Dumping factor: 370 or higher, JEITA (20Hz to 20kHz, Output impedance: 22mΩ, 8Ω loaded)

Input section

LINE IN (Balanced)
Connector: XLR (2: HOT) × 1 pair
Input sensitivity: 1.3V (Output 8Ω, THD 1%)
Input impedance: 10kΩ or higher
LINE IN (Unbalance)
Connector: RCA Pin (gold-plated) × 1 pair
Input sensitivity: 0.66V (Output 8Ω, THD 1%)
Input impedance: 10kΩ or higher

Speaker outputs

Connector: Screw type × 1 set (gold-plated, AWG8 and Banana-plug compatible)
Compatible speaker impedance
Stereo, Bi-amp modes: 4Ω to 16Ω
BTL (Bridge) mode: 8Ω to 16Ω
Power: AC220 to 240V, 50Hz (UK/Europe)
Power consumption: 106W
Standby power: 0.1W or less (at Auto power-saving mode)
Overall dimensions: 290 × 84.5 × 271 mm / 11.4" × 3.3" × 10.7" (W × H × D)
Weight: 4.4kg / 9.7 lbs.
Included accessories: Power code, Owner's manual (incl. Warranty card)

Definitive Technology Demand 11 Specifications


Enclosure Type
Passive Radiator

8 Ω

Number of Speakers
2 Speakers

Speaker Sensitivity
86 – 90 db

Speaker Size

Finish: MDF/Aluminum
Tweeter Type: Hard-Dome
Tweeter Size (inches): 1
Midrange Size (inches): N/A
Woofer Size (inches): 6.5
Woofer Composition: Polypropylene
Woofer Surround: Rubber
Power Range: 20-200
Sensitivity: 90 dB
Impedance (Ohms): 8
Frequency Response: 61-22k Hz
Connector Type: 5-Way post
Bi-amp Inputs: Yes
Height (inches): 13-1/16
Width (inches): 7-5/16
Depth (inches): 12-15/16
Weight (pounds): 19
Mounting Bracket Included: No
Recommended Stand Height (inches): 24-28

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TEAC Canada 1 Year Limited Warranty
Definitive Technology Canada 3 Year Electronics Warranty
Definitive Technology Canada 5 Year Cabinet Warranty
Definitive Technology Canada 5 Year Drivers Warranty


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