Audex CHAAMP (CHP-2000) Cell Phone Amplifier The CHAAMP CHP-2000 cell phone amplifier was made by Audex Inc. of Longview, TX beginning in Sept, 2002. CHAAMP was an acronym for "Compatible Hearing Amplified Accessory for Mobile Phones" The CHAAMP CHP-2000 measured 5¾" x 1⅞" x 11/16" (14.7 x 4.7 x 1.8 cm) and weighed 2.0 oz (56 g). It retailed for $139.00. |  | Click picture for larger view | | |   | | | |
| The CHAAMP CHP-2000 was specifically designed to work with 5 models of Nokia cell phones, Models 3285 (shown here), 5170, 5180, 5185 and 6185.
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| Front view of the Nokia 3285 cell phone with the CHAAMP CHP-2000 attached. |  | Click picture for larger view | | | |
| Rear view of the Nokia 3285 cell phone with the CHAAMP CHP-2000 attached. The volume control is the little rocker wheel visible on the left side of the CHAAMP by the antenna. The button about 1/3 of the way down was the battery release button. You pressed and held the button down while you slid the battery down to release it from the CHAAMP or phone. |  | Click picture for larger view | | | |
| Side view of the Nokia 3285 cell phone with the CHAAMP CHP-2000 attached. The two buttons near the top of the CHAAMP were for recording (lower) and playing (upper) back messages.
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| As you can see by comparing the above picture of the Nokia 3285 with the CHAAMP CPH-2000 attached, it made the phone considerably thicker. |  | Click picture for larger view | | | |
| The CHAAMP CHP-2000 (center) was sandwiched between the phone's battery (left) and the phone's body (right). As a result it had to fit the phone exactly both physically and electronically. Ultimately, this proved to be the CHAAMP's undoing as phone styles were changing so rapidly by the time a new CHAAMP was designed to fit the phone, it was already obsolete.
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| To install the CHAAMP CHP-2000, you simply removed the battery from the back of the phone, and then slid the CHAAMP (left) into the empty battery dock on the phone (right) until it snapped in place. |  | Click picture for larger view | | | |
| Then you slid the battery (left) into the battery dock on the back of the CHAAMP (right) until it snapped in place. It was that simple and could be done in just 5 seconds. To unsnap the CHAAMP from the phone, you just pressed and held the two black buttons (upper and lower right) and slid the CHAAMP towards the bottom of the phone. The CHAAMP didn't have batteries. It got the power it needed from the cell phone's battery. |  | Click picture for larger view | | | |
On the lower back of the CHAAMP CHP-2000 were three switches. The left one turned the t-coil on or off if you wanted to just listen via "bare ears". The middle one turned the speaker on or off so you could save battery life and have more privacy with the speaker off when you were using the t-coils on your hearing aids. The right one turned the loud ringer on or off.
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| The CHAAMP CHP-2000 gave wonderful amplification of 40 dB or so. You could easily hear without using hearing aids unless you had a profound loss. The phone ringer was so loud it could scare people around it, but that was what is needed for hard of hearing people. The center of the label in the center gives the name "CHAAMP", the model number "CHP-2000", the serial number, and the name of the manufacturer, "Audex" as well as stating "Made in USA" on the left. |  | Click picture for larger view | | | |
When the phone rang, the red light (top center) of the CHAAMP flashed so you had visual as well as audible notification.
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| Bottom view of the Nokia 3285 cell phone with the CHAAMP CHP-2000 attached. The pins on the right (for a Nokia handsfree headset) matched the pins on the CHAAMP. Thus when the CHAAMP was attached, the phone went into headset mode. It disabled the phone's microphone. Instead, it used the microphone built into the CHAAMP. The microphone port is the tiny slot in the groove to the left of the green jack. The CHAAMP was quite flexible. You could plug an external microphone to the green 2.5 mm mic jack. You could also plug stereo earphones/earbuds into the blue 2.5 mm stereo audio output jack.
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| With the CHAAMP attached, you listened via the CHAAMP's receiver (top), not via the phones normal receiver on the front of the phone. It may have looked a bit funny to see a person talking into the back of the phone instead of the front as would normally be done. The button on the right was the delete button for recorded messages. There were two lights in the recessed oval (center). The left yellow light indicated the unit was on. It also indicated a message was playing back. The right red light indicated you were recording a message. Note: both of these lights flashed when the phone was ringing. |  | Click picture for larger view | | | |
| View of the cover of the manual for the CHAAMP CMP-2000. Read the complete CHAAMP manual here. Here is a color brochure put out to introduce the CHAAMP.
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