M-Audio AV42 Monitor Speakers ACTIVE 4” 20W RMS (PAIR)

• 4-inch polypropylene-coated woofers for tight, accurate bass
• 1-inch ferrofluid-cooled silk cone tweeters for clear, pristine highs
• OptImage IV tweeter wave guides for superior imaging and detail
• 20-watt per channel amplifier with Class A/B architecture
• RCA inputs for connecting gaming systems, DJ gear, mixers, and more
• Front-panel 1/8-inch stereo auxiliary input for connecting your laptop or desktop computer, MP3 player, or other audio sources
• Front-panel 1/8-inch headphone output
• Front-panel volume control
• Acoustically-inert MDF cabinet with bass reflex design for deep, rich sound
• Attractive black vinyl laminate finish

• Type: Two-way desktop reference speaker
• Low-Frequency Driver: 4" diameter, polypropylene-coated, with high-temperature voice coil
• High-Frequency Driver: 1" diameter, silk cone tweeter
• Frequency Response: 75 Hz – 20 kHz
• Crossover Frequency: 2.7 kHz
• RMS SPL: 101.5 dB @ 1 meter
• Signal-To-Noise Ratio: > 90 dB (typical, A-weighted)
• Input Connectors: Left and right RCA line input, and 1/8" aux input
• Polarity: Positive signal at "+" input produces outward low-frequency cone displacement
• Dynamic Power: 20 watts continuous, per channel into 4 Ω
• Input Impedance: 10 k Ω unbalanced
• Input Sensitivity: 100 mV pink noise input produces 90 dBA output SPL at 1 meter with volume control at maximum
• Protection: RF interference, output current limiting, over temperature, turn on/off transient, subsonic filter
• Indicator: blue power LED for aligning wave guide
• Power Requirements: 100-120V/~50/60 Hz, 220-240V/~50/60 Hz; powered via detachable 2-conductor line cord
• Cabinet: Vinyl-laminated MDF

PRICE PER UNIT

A revolutionary formula: 2 x 7 = 77

In some set-ups it can be advisable to use a horizontally designed speaker rather than a vertical one. Until now, such monitors were only available within the SX top line.

The brand new A77X, due to its outstanding features, might become a true game changer: Equipped with the same advanced technologies as the A7X, it therefore is very similar to the two-way speaker. The A77X, however, distinguishes itself by much higher, compression-free maximum sound pressure levels and dynamics. Due to its power and radiation characteristics, it also is perfectly suited for both near- and midfield monitoring.

Driver technology

Like all models of the AX series, the A77X features the ADAM proprietary X-ART tweeter. The ʽXʼ stands for ʽeXtended frequency responseʼ and thus for one of the features of the Accelerating Ribbon Technology that has been drastically improved: the frequency response. It now extends all the way up to 50kHz. In addition, the X-ART tweeter has higher efficiency and higher maximum sound pressure levels.

The two 7” woofers are identical with that of the A7X. With their large voice coils (1.5”) and powerful amplifiers, they are capable of both very high maximum sound pressure levels as well as very deep registers. The woofers do not cover the same frequency bands: while both of them are responsible for the (sub-) bass frequencies up to about 400Hz, only one of them reproduces the midrange. This prevents interferences between the two drivers. For stereo setups the A77X is available in A and B versions in order to guarantee a precise stereo image.

Amplifiers / controls

Each driver has its own dedicated amplifier. A 50W A/B amp is responsible for the X-ART tweeter, while the bass-/midwoofers are driven by a 100W PWM amp each. The front panel includes a power switch and a control for the volume that retains the volume setting independently from the on/off switch.

The rear panel features several additional controls: a gain for the high frequencies (± 4dB) and two shelf filters for high and low frequencies.
To ensure greater compatibility, there are both XLR (balanced) and RCA (unbalanced) connectors.

Review samples:

“… a refreshing change“
"… if you liked the A7X youʼll like the A77X even more, and if the companyʼs smaller near-fields werenʼt your cup of tea, the A77X are definitely worth another listen. They are not much bigger than a two-driver cabinet design, so should slip into any installation where a near-field speaker will fit, but the extra low/ mid frequency drivers mean that the bass is more naturally extended and the mid-range clearer and more detailed. I like the A77X a lot and they make a refreshing change from the usual mid-priced near-field speakers." AUDIO MEDIA magazine / February 2012

“… wide and spacious soundstage with solid left/right imaging“
"… they are fun and easy to work with, covering all the essential functions required of high-end monitors with aplomb." MusicTech magazine / April 2012

Features of the HR824mk2 Studio Reference Monitor:

- High-resolution Active studio reference monitor
- Ultra-linear frequency response for accurate mix translation
- 8.75 in. high-precision, low-distortion LF transducer
- 1 in. titanium dome, ferrofluid cooled tweeter
- Optimized Waveguide for wide, even sweet zone
- Twin FR Series amps -- 150W for LF / 100W for HF
- Cast aluminum Zero Edge Baffle minimizes diffraction
- Full internal damping eliminates midrange artifacts
- Onboard passive radiator extends bass response to 35Hz
- Acoustic Space, LF roll-off, and HF controls
- Balanced XLR, TRS, and unbalanced RCA inputs
- OmniMount ready for easy wall/ceiling placement
- THX pm3 certified for surround sound applications
- Perfect for High Definition audio, cinema and gaming systems

The compact LSR6325P-1 provides exceptional performance for use in applications
where accuracy is a must, but space is limited. With a 5.25 in. high-excursion woofer,
a damped titanium composite tweeter, and 150 Watts of amplification, it outperforms
many larger systems. When used with the LSR6312SP Subwoofer, the LSR6325P-1
is the heart of an exceptionally accurate yet space efficient full-range system.

Features:
High-performance bi-amplified design with patented JBL transducer technology.
Front panel volume and power controls.
Integrated mounting points for horizontal and vertical suspension.
Titanium composite high frequency device with elliptical oblate spheroidal waveguide.
Shielded for use next to video monitors.
Built in high-pass filtering for use with optional subwoofer.
User selectable workstation boundary compensation.
Powered monitors with 5.25" woofers and 1" titanium composite dome tweeters
100 watts power for low frequencies, 50 watts for highs
Cast aluminum enclosure for structural rigidity and light weight
Magnetically shielded for interference-free use near CRTs and other electronic gear
Linear Spatial Reference technology ensures even frequency response at the mix position
 

Features
Ruler-Flat Response 52Hz to 20kHz, + 1.5 dB

Benefit: Sound true to actual recording

Benefit: Any pair of speakers is a matched pair

Active Technology

2 FR (Fast Recovery) Series Amplifiers; HF 40W; LF 100W

Benefit: Precise dividing slope, correct phase, and low distortion

Benefit: Minimal chance of speaker damage due to overdriving

Servo Loop Woofer Technology

Electronic control and dampening

Benefit: Speaker output is as true to incoming signal as possible

Frequency Response Controls

80Hz low-cut switch; 3-position live/dead switch (-2bdB, Normal and +2dB)

Benefit: Excellent response in a variety of acoustic environments

Wide Sweet Spot

Custom-designed die-cast wave guide

Benefit: User hears the same thing across a wider range of motion

3-Position Acoustic Space Switch

Compensation in bass response for half-space (-2dB) and quarter-space (-4dB) placement

Benefit: As close-to-flat performance as possible regardless of placement in room

Applications
Professional Recording Studios

Home and Project Studios

Film (THX) and Post Production Studios

Home Theater Installations

Acoustic Performance
Free Field Frequency Response: 52Hz - 20Hz