POLK AUDIO SWA 500 Dedicated Digital Power Amplifier For CSW Series 800W/4Ω 250W/8Ω

Driver Complement
Electrical
Dimensions
Cabinet Size     3-1/2" H x 17" W x 12-5/8" D
(8.89cm H x 43.18cm W x 32.07cm D)
Shipping/Other     
Shipping unit:     each
Total Shipping Weight     14.00 lbs. (6.35kgs)

Toroidal Transformer

We mount the premium toroidal transformer centrally, to reduce flux or magnetic disturbance from the volume pot.

The output power transistors used by the CXA60 are not your usual common or garden offerings. They come with an integrated Dynamic Thermal Tracking System. So what does this mean? Normally a Power Output transistor utilises a thermo-coupler attached directly to the heat sink of the amp; this informs the system so that it can re-bias when key temperatures are reached. However, using Integrated Dynamic Thermal tracking provides a far more accurate reading of the real temperature of a transistor, and relays it faster too because itʼs not a delayed heating effect. This enables us to bias the amplifier more accurately and in almost real time. Which means your CXA60 is always running at optimum performance.

If you want to use a subwoofer as part of your speaker complement, the CXA60 doesnʼt penalise you for it. Because we want to ensure thereʼs no unnecessary high frequency noise affecting the subwoofer, weʼve put the output filter at 3kHz. This is high enough to prevent any phase shift associated with the low pass filter affecting what happens below 200Hz. The result is a phase linear subwoofer output signal which is clean and musical.

Thereʼs some revolutionary signal management happening beneath the lid of the CXA60. For the first time, our engineers decided to go fully balanced rather than single-ended all the way through. As a consequence, any noise that that might be picked up in the audio signal while routing through the amplifier is cancelled before itʼs output.

The CX range represents a step change in the way our engineers have approached signal path design, and the result is one of our most musical and entertaining amplifiers yet. Previously, we went to almost surgical lengths to minimise distortion in order to get the best results. This invariably meant 46 components sat in the signal path. For the CX Series, we wanted to dramatically reduce that component count. The CXA60 now has only 24 components in the signal path. The big difference is that there are now 500 support components as well.

Their job is to guarantee those 24 key components are absolutely optimal all the time, regardless of mains fluctuations and other influences. This has made a big difference when it comes to tuning. Previously, tweaking one of the 46 components only made a small difference and it was sometimes difficult to quantify exactly what difference any change made. With the CX series, those 24 components have now actually become quite critical. Changing just one affects the character of the amplifier. We can hear very clearly what each of those components is doing.

This revision has fundamentally changed the character of the amplifier. Listening to a CX series amplifier is fun, engaging and exciting.

If you want to use your CXA60 with a Bluetooth source, we offer an optional BT100 audio receiver. To ensure that this does not interfere with other components in the amplifier, itʼs isolated internally on the digital input board. From the ground up, this is an audiophile Bluetooth device. All the coding for the BT100 is done in-house. We even include an extension cable which enables you get the best Bluetooth range.

Sometimes thereʼs a good reason to keep things uncomplicated. The CXA60 features a high-quality damped metal chassis, designed to ensure that nothing rattles or interferes with the electronics. Weʼve also kept volume control simple. The CXA60 uses a logarithmic ALPS pot. And when it comes to switching inputs, the CXA60 uses relay switching with silver plated contacts. This classic approach is still the best way to move signals around, rather than with transistors or electronic switches.

• Power output:60W RMS into 8 Ohms, 90W RMS into 4 Ohms
• DAC:Wolfson WM8740
• Frequency Response:

Advanced original amplifier circuitry and elimination of signal loss—resulting in a truly
emotional and dynamic sound. This is a high-grade integrated amplifier that has inherited
the new sound of Yamaha in the pursuit of rich musicality..

• Floating and Balanced Power Amplifier with MOSFETs
• All-stage fully discrete construction, balanced transmission and low impedance design
• Superior quality electronic volume control for optimum sound
• Large capacity power supply unit delivers energetic, dynamic sound with fast response
• Symmetrical design in pursuit of ideal stereo reproduction
• Discretely configured phono amp
• Headphone amp with fully discrete configuration
• Level meters visually reflect the dynamics in the music
• Elegant design with luxurious real wood panels
• Original speaker terminals combine ease of use and beauty with high sound quality

High rigidity metal frame
Shielded high current power supply
• 500VA toroidal transformer
• 80.000uF capacitor bank
• Rubber insulated aluminium feet
• WBT connector on unbalanced input
• Neutrik connector on balanced input
• Fully discrete analogue design
• Onsemi MJL1302/3281 power transistor
• Low overall feedback
• High stability on capacitive loads
• White Gold cable on output connection
• 100W/8Ohm power unit and double the
power on 4 Ohm until 390W on 2Ohm; a
big power reserve that allows to drive any loudspeakers even in a big room.

Enjoy superb sound from your favorite analog and digital sources with the Marantz PM7005 integrated stereo amplifier. Featuring a high current discrete power output stage with current feedback (a Marantz innovation), the PM7005 is also equipped with our exclusive HDAM technology, employing proprietary circuit modules with discrete components that deliver ultra-wideband response and fast slew rate.

The versatile PM7005 features multiple analog and digital inputs, including optical and coaxial digital inputs along with a USB-B 2.0 for direct connection to computer high resolution digital audio sources. Featuring the reference-class CS4398 high resolution D/A converter, the PM7005 can decode high resolution digital audio files up to 24 bits and 192 kHz sampling. It's also compatible with DSD 2.8 MHz and 5.6 MHz high resolution files (the same system found on SACD), and the asynchronous USB-B port also features jitter removal for the most pristine sound quality.

There are multiple analog inputs, including a MM phono input, along with dual recording inputs and outputs, and the Source Direct function bypasses the balance and tone controls for the shortest signal path, while the Analog mode disables the digital circuitry when listening to analog sources.

Overview

Integrated Amplifier with DAC mode

Integrated Amp with USB-DAC for High-res Audio and "Simple & Straight” Engineering Design from High-end Models

• 2 x 160 W (4 ohm) output
• Advanced Ultra High Current (UHC)-MOS Single Push-Pull Circuit Power Amplifier with new Schottky barrier diodes
• DAC Master Clock Design
• USB-B input for High Resolution Audio up to 384 kHz / 32 bit and 11.2 MHz DSD
• Digital isolator to eliminate high-frequency computer noise on the USB-B
• Low noise OLED display for source and sample rate indication
• Analog Mode for pure audio reproduction switching off digital audio circuitry and display
• Advanced AL32 Processing Plus
• Direct Mechanical Ground Construction to minimize unwanted vibration
• Chassis construction with 6 independent blocks to eliminate noises
• Leakage-cancelling-mounted twin transformers
• Main transformer with separate power supplies for analogue and digital circuits
• Wide dynamic range playback, supporting high-resolution audio sources
• High-grade volume control for precise adjustment
• 2 Digital Optical and 2 Digital Coaxial inputs
• High performance MM & MC Phono Equalizer Amp
• Available in Premium Silver

Denon is one of the rare audio brands that continued to actively develop Hi-Fi components and accumulate, refine, and pass down Hi-Fi audio technologies. The 2500NE series, designed for todayʼs age, has been developed by both veteran engineers and talented young engineers who have inherited the Denon technologies and expertise that have been cultivated over many years and decades. And the performance of the PMA-2500NE goes well beyond that of Denonʼs previous PMA-2000 series. With its ultimate built-quality, unique Denon technologies and state-of-the-art connectivity, the PMA-2500NE truly is a masterpiece of sound technology. Thanks to the rear USB-B input and embedded high quality D/A converter, the PMA plays high resolution files up to 384kHz/32bit and DSD up to 11.2MHz from a computer in impeccable sonic quality. For the best performance from analogue inputs, the PMA features an Analog Mode which allows to switch off all unutilized sections like the digital input circuitry or the low noise display for an unaltered audio reproduction.

Channels 2

Digital in: USB-B / optical / coaxial / USB-A / 2 / 2 /

Sample Rate digital In 192 kHz / 24-bit

USB-B DSD Audio Streaming (DoP): DSD2.8 / DSD5.6