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The 2x3EQ ParametricEQ/PreAmp/Mixer ($450 List)
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Two isolated, independent channels. | Three fully parametric bands
on each channel. |
Equalized channels can be mixed
or output separately. | Separate isolated stereo output
for other device/s such as earphones.
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3D View
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Front-Panel View
Back-Panel View |
Top-Panel View
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| Click on any thumbnail of the 2x3EQ to see the enlarged JPEG. Most enlargements are partitioned into buttons so you can click on any jack, knob or control and receive information about that item. |
This 2x3 utilizes a patented method of impedance simulation to accomplish parametric
equalization
of the utmost quality and versatility, for a cost savings never before achievable by any real competitor.
The following links describe features that users should expect of a parametric equalizer.
Learn about Spectral Distribution Optimization, a great feature of all Collier 2x3s.
Specs for the Collier 2x3EQ
Dimensions: 3" high x 7" wide x 9" deep - Black-Anodized Aluminum Chassis
Power Requirement: 120 VAC @ < 0.25 Amps
2 channel preAmp / parametric-equalizer / mixer, with
3 fully parametric bands per channel.
Each channel can be independently equalized. Then the two bands can be separately output (from two stereo outs) or they can be mixed, to produce two equivalent isolated mono outputs.
Alternatively, the two channels can be operated in sequence to provide a 6-band one-channel parametric EQ.
Outputs include two independent stereo outputs:
- An Earphones output from a front panel 1/4-inch stereo phone jack, including its own volume control (See Front-Panel View), and
- An isolated stereo Main Output from two 1/4-inch mono jacks on the Back Panel. These also have their own volume control (See Back-Panel View). An additional pair of low-level Main Outputs is/are also provided on the Back Panel, because low-level outputs are sometimes needed for driving sensitive front-ends of other devices.
General response features are as follows:
+20/-infinity dB max boost/cut on each band
Wide overlapping of the bands' center-freq selection ranges
Input Impedance 500 KOhms (each channel)
Up to 60 dB preamplification of low level inputs
Max input, unlimited, due to a special pre-attenuation technique utilized at each input (theta-squared tapering)
Output Impedances:
| 2 Main outputs | < 100 Ohms/channel |
| Stereo earphone outputs | < 100 Ohms/channel |
Dynamic range: > 80 dB
Bandwidth for each of the 6 parametric filters are adjustable from a range including not less than 0.1 - 2.8 octaves (See the following note.)
(These bandwidth ranges define the 'worst-case' constraints: At the lowest center-frequency setting for a band, its bandwidth can be chosen from less than 0.0071 octaves up to 2.8 octaves, and at the highest center-frequency setting, its bandwidth can be chosen from 0.1 octave to more than 9 octaves. But NO MATTER WHAT the setting chosen for the center frequency, the accessible range of bandwidths includes all (and more) of the preceeding specification.
Balanced and unbalanced I/Os with phantom power*
Adjustable low-pass and high-pass shelves*
Signal inverting switch on each channel*
EQ bypass switch for each channel*
* These last four features are available only in the 2X3 Parametric Mixer.
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