Overview | Tech Specs

The Pro Acoustic Mix DI® provides the essential tools that acoustic musicians need to get the most from their instruments in a package small enough to fit in many guitar cases. As with all Highlander Products the noise and distortion are substantially below the threshold of human hearing and unmatched in the industry.

The Input Stages are designed to match active piezo pickup systems, electret condenser microphones and magnetic pickups providing vibrant, full range sound. Phase Reverse Switches negate potential incompatibility problems that may occur when using combinations of pickups (and/or mics) from different manufacturers.

The Tunable EQ® on each channel is easy to use yet sophisticated enough to deal with difficult room acoustics. Each unit comes with a booklet that explains how to obtain great sound even in adverse conditions using this unique equalizer. The extended frequency range of this equalizer enables full, warm bass harmonics to be brought out while opening up the top end with transparency and a beautiful "air like" quality.

Instrument Microphones: There are a wide variety of Electret Condenser Microphones available for acoustic instrument amplification. Unfortunately, there is no "standard" method for powering these mics. The Pro Acoustic Mix DI has a unique and innovative microphone power circuit on Channel 2. This circuit senses the power requirements of almost every (two wire) type of Electret Mic available and delivers optimal power for each type of microphone.
Note: Mic Power is Not Required for Highlander’s Internal Mic.

Channel Inserts enable the use of "in-line" effects (i.e. limiters or chorus units, etc.) while an overall FX Loop is provided to enable reverb and/or echo effects to be easily mixed in.
Note: The channel insert can also be used to provide an independent output from either channel.

The Balanced Output is electronically balanced and designed to provide stable, high quality audio even when driving long lengths of cable. Alleviating the need for a DI (direct) box, this output is perfect for "driving" professional power amplifiers, PA systems and recording consoles. The Unbalanced Output is ideal for connecting to acoustic guitar amplifiers, power amplifiers and powered speakers. Its low impedance ensures stable, low noise audio and compatibility with a wide variety of systems.

The Tuner Output is "buffered" to avoid degrading the audio quality of the main outputs. This output remains active when the master mute switch is activated so the audience does not have to listen to instruments being tuned.

The "FX Loop" is a combination of an output or FX Send, an input or FX Return and FX Fader that enables the user to mix a special effect (e.g. reverb or echo) with the sound of the instrument. A portion of the signal from both Channels is combined (electronically mixed) and connected to the FX Send Jack. The amount of signal from each Channel is determined by the level of each Channel’s Fader. The FX Return is connected to the FX Fader, which in turn is routed to the Master Output Mixing Stage.
Note: The FX Return can be also be used as an extra instrument input, although there is no EQ, Phase Reverse or separate Mute.

Highlander products are built to be rugged and durable. The Pro Acoustic Mix DI® is no exception. The case is constructed from steel, which is rugged and durable and provides superior electromagnetic shielding. This helps achieve the lowest noise performance even in adverse conditions.

Tech Specs

With the exception of "Clipping" all of the following specifications apply to either method of powering the unit (Batteries or AC Adapter).

• Continuously On when using the AC Adapter
• Slow Flashing when using Battery Power
• Fast Flashing when the Batteries are low

The unit will run for approximately 120 hours from two 9v alkaline batteries.
The unit is supplied with the AD18; AC Adapter.

** 2nd Harmonic distortion, at the low levels that it occurs in the Pro Acoustic Mix DI, is probably not audible. However, this type of harmonic distortion is the prevalent type of distortion in tube amplifiers and is associated with warm sound.

Extended Response
Extended Hi End
During the course Highlander’s extensive research, harmonics as high as 45KHz have been regularly measured emanating from acoustic guitars. We are sure that many acoustic instruments produce even higher harmonics. While the human ear cannot detect frequencies this high, these harmonics do have an effect on what we hear and perceive. For example, it is well known that two frequencies that are close in pitch generate "beat" frequencies. Some musicians use these beat frequencies to aid in tuning. These beat frequencies are actually the sum and difference of the original pitches. If the difference between two high harmonics (e.g. 40KHz and 42KHz) is 2KHz, this can be heard even though the harmonics cannot.

Extended Low End
The low "E" string on a guitar in standard tuning is 82.4Hz. If the "bass boost" on an equalizer is preset to 80Hz or higher then the low "E" string is actually being turned up when the bass is turned up thereby unbalancing the stings. The Extend Range EQ on the Pro Acoustic Mix DI goes down to 25Hz enabling the low end to be warmed up without unbalancing the strings.

Note: A "phase linear" low end roll off at 15Hz ensures that subsonic frequencies are not a problem.
Typically, in order to "roll off" the low end, a phase shift is incurred. Our Extended Low End Response also insures that bass instruments will not suffer any phase shift when their lowest notes are played through Highlander equipment.
These are just some of the reasons why Highlander strives to produce equipment with Extended Frequency Response.

Regular Price: $749.95
Our Price: $599.99
Please Inquire or phone (828) 658-9795 for more information